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Add PIC32 SPI driver
git-svn-id: https://nuttx.svn.sourceforge.net/svnroot/nuttx/trunk@4459 7fd9a85b-ad96-42d3-883c-3090e2eb8679
This commit is contained in:
patacongo
@@ -2534,4 +2534,6 @@
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* configs/sure-pic32mx/usbnsh and configs/sure-pic32mx/src: Add support for
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NSH using only USB serial I/O to support the console. This is useful on
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devices that have USB, but no serial port.
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* arch/mips/src/pic32mx/pic32mx_spi.c: Add a PIC32 SPI driver. Initial
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checkin is primitive, incomplete (lacks interrupt logic), and untested.
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@@ -1,7 +1,7 @@
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/****************************************************************************
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* arch/mips/include/pic32mx/irq_5xx6xx7xx.h
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*
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* Copyright (C) 2011 Gregory Nutt. All rights reserved.
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* Copyright (C) 2011-2012 Gregory Nutt. All rights reserved.
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* Author: Gregory Nutt <gnutt@nuttx.org>
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*
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* Redistribution and use in source and binary forms, with or without
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@@ -148,8 +148,8 @@
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#define PIC32MX_IRQSRC_IC5 (128+21) /* Vector: 21, Input Capture 5 */
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#define PIC32MX_IRQSRC_OC5 (128+22) /* Vector: 22, Output Compare 5 */
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#define PIC32MX_IRQSRC_SPI1E (128+23) /* Vector: 23, SPI1 Fault */
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#define PIC32MX_IRQSRC_SPI1TX (128+24) /* Vector: 23, " " Receive done */
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#define PIC32MX_IRQSRC_SPI1RX (128+25) /* Vector: 23, " " Transfer done */
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#define PIC32MX_IRQSRC_SPI1RX (128+24) /* Vector: 23, " " Receive done */
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#define PIC32MX_IRQSRC_SPI1TX (128+25) /* Vector: 23, " " Transfer done */
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#define PIC32MX_IRQSRC_26 (128+26) /* Vector: 24, UART1, SPI3, I2C3 */
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# define PIC32MX_IRQSRC_U1E (128+26) /* Vector: 24, UART1 Error */
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# define PIC32MX_IRQSRC_SPI3E (128+26) /* Vector: 24, SPI3 Fault */
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@@ -1,7 +1,7 @@
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############################################################################
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# arch/mips/src/pic32mx/Make.defs
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#
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# Copyright (C) 2011 Gregory Nutt. All rights reserved.
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# Copyright (C) 2011-2012 Gregory Nutt. All rights reserved.
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# Author: Gregory Nutt <gnutt@nuttx.org>
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#
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# Redistribution and use in source and binary forms, with or without
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@@ -62,7 +62,8 @@ endif
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CHIP_ASRCS =
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CHIP_CSRCS = pic32mx-irq.c pic32mx-decodeirq.c pic32mx-exception.c pic32mx-gpio.c \
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pic32mx-lowconsole.c pic32mx-lowinit.c pic32mx-serial.c pic32mx-timerisr.c
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pic32mx-lowconsole.c pic32mx-lowinit.c pic32mx-serial.c pic32mx-spi.c \
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pic32mx-timerisr.c
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# Configuration-dependent PIC32MX files
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@@ -0,0 +1,852 @@
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/****************************************************************************
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* arch/mips/src/pic32mx/pic32mx-spi.c
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*
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* Copyright (C) 2012 Gregory Nutt. All rights reserved.
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* Author: Gregory Nutt <gnutt@nuttx.org>
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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*
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in
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* the documentation and/or other materials provided with the
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* distribution.
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* 3. Neither the name NuttX nor the names of its contributors may be
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* used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
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* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
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* COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
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* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
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* OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
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* AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
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* ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*
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****************************************************************************/
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/****************************************************************************
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* Included Files
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****************************************************************************/
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#include <nuttx/config.h>
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#include <sys/types.h>
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#include <stdint.h>
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#include <stdbool.h>
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#include <semaphore.h>
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#include <errno.h>
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#include <debug.h>
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#include <arch/board/board.h>
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#include <nuttx/arch.h>
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#include <nuttx/spi.h>
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#include "up_internal.h"
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#include "up_arch.h"
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#include "chip.h"
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#include "pic32mx-internal.h"
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#include "pic32mx-spi.h"
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#if defined(CONFIG_PIC32MX_SPI1) || defined(CONFIG_PIC32MX_SPI2) || \
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defined(CONFIG_PIC32MX_SPI3) || defined(CONFIG_PIC32MX_SPI4)
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/****************************************************************************
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* Definitions
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****************************************************************************/
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/* Enables non-standard debug output from this file */
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#ifndef CONFIG_DEBUG
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# undef CONFIG_DEBUG_SPI
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#endif
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#ifdef CONFIG_DEBUG_SPI
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# define spidbg lldbg
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# ifdef CONFIG_DEBUG_VERBOSE
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# define spivdbg lldbg
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# else
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# define spivdbg(x...)
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# endif
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#else
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# undef CONFIG_DEBUG_VERBOSE
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# define spidbg(x...)
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# define spivdbg(x...)
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#endif
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/****************************************************************************
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* Private Types
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****************************************************************************/
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/* This structure descibes the state of the SSP driver */
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struct pic32mx_dev_s
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{
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struct spi_dev_s spidev; /* Externally visible part of the SPI interface */
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uint32_t base; /* SPI register base address */
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#ifdef CONFIG_PIC32MX_SPI_INTERRUPTS
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uint8_t vector; /* Interrupt vector number(for attaching) */
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uint8_t eirq; /* SPI fault interrupt number */
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uint8_t rxirq; /* SPI receive done interrupt number */
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uint8_t txirq; /* SPI transfer done interrupt number */
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#endif
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#ifndef CONFIG_SPI_OWNBUS
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sem_t exclsem; /* Held while chip is selected for mutual exclusion */
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uint32_t frequency; /* Requested clock frequency */
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uint32_t actual; /* Actual clock frequency */
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uint8_t nbits; /* Width of word in bits (8 to 16) */
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uint8_t mode; /* Mode 0,1,2,3 */
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#endif
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};
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/****************************************************************************
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* Private Function Prototypes
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****************************************************************************/
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/* Low-level register access */
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static uint32_t spi_getreg(FAR struct pic32mx_dev_s *priv,
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unsigned int offset);
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static void spi_putreg(FAR struct pic32mx_dev_s *priv,
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unsigned int offset, uint32_t value);
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/* SPI methods */
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#ifndef CONFIG_SPI_OWNBUS
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static int spi_lock(FAR struct spi_dev_s *dev, bool lock);
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#endif
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static uint32_t spi_setfrequency(FAR struct spi_dev_s *dev, uint32_t frequency);
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static void spi_setmode(FAR struct spi_dev_s *dev, enum spi_mode_e mode);
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static void spi_setbits(FAR struct spi_dev_s *dev, int nbits);
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static uint16_t spi_send(FAR struct spi_dev_s *dev, uint16_t ch);
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static void spi_sndblock(FAR struct spi_dev_s *dev, FAR const void *buffer, size_t nwords);
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static void spi_recvblock(FAR struct spi_dev_s *dev, FAR void *buffer, size_t nwords);
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/****************************************************************************
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* Private Data
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****************************************************************************/
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#ifdef CONFIG_PIC32MX_SPI1
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static const struct spi_ops_s g_spi1ops =
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{
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#ifndef CONFIG_SPI_OWNBUS
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.lock = spi_lock,
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#endif
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.select = pic32mx_spi1select,
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.setfrequency = spi_setfrequency,
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.setmode = spi_setmode,
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.setbits = spi_setbits,
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.status = pic32mx_spi1status,
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#ifdef CONFIG_SPI_CMDDATA
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.cmddata = pic32mx_spi1cmddata,
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#endif
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.send = spi_send,
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.sndblock = spi_sndblock,
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.recvblock = spi_recvblock,
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#ifdef CONFIG_SPI_CALLBACK
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.registercallback = pic32mx_spi1register, /* Provided externally */
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#else
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.registercallback = 0, /* Not implemented */
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#endif
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};
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static struct pic32mx_dev_s g_spi1dev =
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{
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.spidev = { &g_spi1ops },
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.base = PIC32MX_SPI1_K1BASE,
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#ifdef CONFIG_PIC32MX_SPI_INTERRUPTS
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.vector = PIC32MX_IRQ_SPI1,
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.eirq = PIC32MX_IRQSRC_SPI1E,
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.rxirq = PIC32MX_IRQSRC_SPI1RX,
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.txirq = PIC32MX_IRQSRC_SPI1TX,
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#endif
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};
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#endif
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#ifdef CONFIG_PIC32MX_SPI2
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static const struct spi_ops_s g_spi2ops =
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{
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#ifndef CONFIG_SPI_OWNBUS
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.lock = spi_lock,
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#endif
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.select = pic32mx_spi2select,
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.setfrequency = spi_setfrequency,
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.setmode = spi_setmode,
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.setbits = spi_setbits,
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.status = pic32mx_spi2status,
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#ifdef CONFIG_SPI_CMDDATA
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.cmddata = pic32mx_spi2cmddata,
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#endif
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.send = spi_send,
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.sndblock = spi_sndblock,
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.recvblock = spi_recvblock,
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#ifdef CONFIG_SPI_CALLBACK
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.registercallback = pic32mx_spi2register, /* Provided externally */
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#else
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.registercallback = 0, /* Not implemented */
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#endif
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};
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static struct pic32mx_dev_s g_spi2dev =
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{
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.spidev = { &g_spi2ops },
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.base = PIC32MX_SPI2_K1BASE,
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#ifdef CONFIG_PIC32MX_SPI_INTERRUPTS
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.vector = PIC32MX_IRQ_SPI2,
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.eirq = PIC32MX_IRQSRC_SPI2E,
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.rxirq = PIC32MX_IRQSRC_SPI2RX,
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.txirq = PIC32MX_IRQSRC_SPI2TX,
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#endif
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};
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#endif
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#ifdef CONFIG_PIC32MX_SPI3
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static const struct spi_ops_s g_spi3ops =
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{
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#ifndef CONFIG_SPI_OWNBUS
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.lock = spi_lock,
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#endif
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.select = pic32mx_spi3select,
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.setfrequency = spi_setfrequency,
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.setmode = spi_setmode,
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.setbits = spi_setbits,
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.status = pic32mx_spi3status,
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#ifdef CONFIG_SPI_CMDDATA
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.cmddata = pic32mx_spi3cmddata,
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#endif
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.send = spi_send,
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.sndblock = spi_sndblock,
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.recvblock = spi_recvblock,
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#ifdef CONFIG_SPI_CALLBACK
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.registercallback = pic32mx_spi3register, /* Provided externally */
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#else
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.registercallback = 0, /* Not implemented */
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#endif
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};
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static struct pic32mx_dev_s g_spi3dev =
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{
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.spidev = { &g_spi3ops },
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.base = PIC32MX_SPI3_K1BASE,
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#ifdef CONFIG_PIC32MX_SPI_INTERRUPTS
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.vector = PIC32MX_IRQ_SPI4,
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.eirq = PIC32MX_IRQSRC_SPI3E,
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.rxirq = PIC32MX_IRQSRC_SPI3RX,
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.txirq = PIC32MX_IRQSRC_SPI3TX,
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#endif
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};
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#endif
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#ifdef CONFIG_PIC32MX_SPI4
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static const struct spi_ops_s g_spi4ops =
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{
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#ifndef CONFIG_SPI_OWNBUS
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.lock = spi_lock,
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#endif
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.select = pic32mx_spi4select,
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.setfrequency = spi_setfrequency,
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.setmode = spi_setmode,
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.setbits = spi_setbits,
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.status = pic32mx_spi4status,
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#ifdef CONFIG_SPI_CMDDATA
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.cmddata = pic32mx_spi4cmddata,
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#endif
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.send = spi_send,
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.sndblock = spi_sndblock,
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.recvblock = spi_recvblock,
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#ifdef CONFIG_SPI_CALLBACK
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.registercallback = pic32mx_spi4register, /* Provided externally */
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#else
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.registercallback = 0, /* Not implemented */
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#endif
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};
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static struct pic32mx_dev_s g_spi4dev =
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{
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.spidev = { &g_spi4ops },
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.base = PIC32MX_SPI4_K1BASE,
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#ifdef CONFIG_PIC32MX_SPI_INTERRUPTS
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.vector = PIC32MX_IRQ_SPI4,
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.eirq = PIC32MX_IRQSRC_SPI4E,
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.rxirq = PIC32MX_IRQSRC_SPI4RX,
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.txirq = PIC32MX_IRQSRC_SPI4TX,
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#endif
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};
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#endif
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/****************************************************************************
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* Public Data
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****************************************************************************/
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/****************************************************************************
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* Private Functions
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****************************************************************************/
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/****************************************************************************
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* Name: spi_getreg
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*
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* Description:
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* Return the contents of one, 32-bit SPI register
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*
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* Input Parameters:
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* priv - A pointer to a PIC32MX SPI state structure
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* offset - Offset from the SPI base address to the register of interest
|
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*
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* Returned Value:
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* The current contents of the register
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*
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****************************************************************************/
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static uint32_t spi_getreg(FAR struct pic32mx_dev_s *priv, unsigned int offset)
|
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{
|
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return getreg32(priv->base + offset);
|
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}
|
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|
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/****************************************************************************
|
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* Name: spi_getreg
|
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*
|
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* Description:
|
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* Write a value to one, 32-bit SPI register
|
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*
|
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* Input Parameters:
|
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* priv - A pointer to a PIC32MX SPI state structure
|
||||
* offset - Offset from the SPI base address to the register of interest
|
||||
* value - The value to write to the SPI register
|
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*
|
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* Returned Value:
|
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* None
|
||||
*
|
||||
****************************************************************************/
|
||||
|
||||
static void spi_putreg(FAR struct pic32mx_dev_s *priv, unsigned int offset,
|
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uint32_t value)
|
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{
|
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putreg32(value, priv->base + offset);
|
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}
|
||||
|
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/****************************************************************************
|
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* Name: spi_lock
|
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*
|
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* Description:
|
||||
* On SPI busses where there are multiple devices, it will be necessary to
|
||||
* lock SPI to have exclusive access to the busses for a sequence of
|
||||
* transfers. The bus should be locked before the chip is selected. After
|
||||
* locking the SPI bus, the caller should then also call the setfrequency,
|
||||
* setbits, and setmode methods to make sure that the SPI is properly
|
||||
* configured for the device. If the SPI buss is being shared, then it
|
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* may have been left in an incompatible state.
|
||||
*
|
||||
* Input Parameters:
|
||||
* dev - Device-specific state data
|
||||
* lock - true: Lock spi bus, false: unlock SPI bus
|
||||
*
|
||||
* Returned Value:
|
||||
* None
|
||||
*
|
||||
****************************************************************************/
|
||||
|
||||
#ifndef CONFIG_SPI_OWNBUS
|
||||
static int spi_lock(FAR struct spi_dev_s *dev, bool lock)
|
||||
{
|
||||
FAR struct pic32mx_dev_s *priv = (FAR struct pic32mx_dev_s *)dev;
|
||||
|
||||
if (lock)
|
||||
{
|
||||
/* Take the semaphore (perhaps waiting) */
|
||||
|
||||
while (sem_wait(&priv->exclsem) != 0)
|
||||
{
|
||||
/* The only case that an error should occur here is if the wait was awakened
|
||||
* by a signal.
|
||||
*/
|
||||
|
||||
ASSERT(errno == EINTR);
|
||||
}
|
||||
}
|
||||
else
|
||||
{
|
||||
(void)sem_post(&priv->exclsem);
|
||||
}
|
||||
return OK;
|
||||
}
|
||||
#endif
|
||||
|
||||
/****************************************************************************
|
||||
* Name: spi_setfrequency
|
||||
*
|
||||
* Description:
|
||||
* Set the SPI frequency.
|
||||
*
|
||||
* Input Parameters:
|
||||
* dev - Device-specific state data
|
||||
* frequency - The SPI frequency requested
|
||||
*
|
||||
* Returned Value:
|
||||
* Returns the actual frequency selected
|
||||
*
|
||||
****************************************************************************/
|
||||
|
||||
static uint32_t spi_setfrequency(FAR struct spi_dev_s *dev, uint32_t frequency)
|
||||
{
|
||||
FAR struct pic32mx_dev_s *priv = (FAR struct pic32mx_dev_s *)dev;
|
||||
uint32_t divisor;
|
||||
uint32_t actual;
|
||||
uint32_t regval;
|
||||
|
||||
/* Check if the requested frequency is the same as the frequency selection */
|
||||
|
||||
#ifndef CONFIG_SPI_OWNBUS
|
||||
if (priv->frequency == frequency)
|
||||
{
|
||||
/* We are already at this frequency. Return the actual. */
|
||||
|
||||
return priv->actual;
|
||||
}
|
||||
#endif
|
||||
|
||||
/* Calculate the divisor
|
||||
*
|
||||
* frequency = BOARD_PBCLOCK / (2 * divisor), or
|
||||
* divisor = (BOARD_PBCLOCK / 2) / frequency
|
||||
*/
|
||||
|
||||
divisor = (BOARD_PBCLOCK / 2) / frequency;
|
||||
|
||||
/* The a BRG register value is that divisor minus one
|
||||
*
|
||||
* frequency = BOARD_PBCLOCK /(2 * (BRG + 1)), or
|
||||
* BRG = (BOARD_PBCLOCK / 2) / frequency - 1
|
||||
*/
|
||||
|
||||
regval = divisor;
|
||||
if (regval > 0)
|
||||
{
|
||||
regval--;
|
||||
}
|
||||
|
||||
/* Save the new BRG value */
|
||||
|
||||
spi_putreg(priv, PIC32MX_SPI_BRG_OFFSET, regval);
|
||||
|
||||
/* Calculate the new actual frequency"
|
||||
*
|
||||
* frequency = BOARD_PBCLOCK / (2 * divisor)
|
||||
*/
|
||||
|
||||
actual = (BOARD_PBCLOCK / 2) / divisor;
|
||||
|
||||
/* Save the frequency setting */
|
||||
|
||||
#ifndef CONFIG_SPI_OWNBUS
|
||||
priv->frequency = frequency;
|
||||
priv->actual = actual;
|
||||
#endif
|
||||
|
||||
spidbg("Frequency %d->%d\n", frequency, actual);
|
||||
return actual;
|
||||
}
|
||||
|
||||
/****************************************************************************
|
||||
* Name: spi_setmode
|
||||
*
|
||||
* Description:
|
||||
* Set the SPI mode. Optional. See enum spi_mode_e for mode definitions
|
||||
*
|
||||
* Input Parameters:
|
||||
* dev - Device-specific state data
|
||||
* mode - The SPI mode requested
|
||||
*
|
||||
* Returned Value:
|
||||
* none
|
||||
*
|
||||
****************************************************************************/
|
||||
|
||||
static void spi_setmode(FAR struct spi_dev_s *dev, enum spi_mode_e mode)
|
||||
{
|
||||
FAR struct pic32mx_dev_s *priv = (FAR struct pic32mx_dev_s *)dev;
|
||||
uint32_t regval;
|
||||
|
||||
/* Has the mode changed? */
|
||||
|
||||
#ifndef CONFIG_SPI_OWNBUS
|
||||
if (mode != priv->mode)
|
||||
{
|
||||
#endif
|
||||
/* Yes... Set CR appropriately */
|
||||
|
||||
regval = spi_getreg(priv, PIC32MX_SPI_CON_OFFSET);
|
||||
regval &= ~(SPI_CON_CKP|SPI_CON_SMP);
|
||||
|
||||
switch (mode)
|
||||
{
|
||||
case SPIDEV_MODE0: /* CPOL=0; CPHA=0 */
|
||||
break;
|
||||
|
||||
case SPIDEV_MODE1: /* CPOL=0; CPHA=1 */
|
||||
regval |= SPI_CON_SMP;
|
||||
break;
|
||||
|
||||
case SPIDEV_MODE2: /* CPOL=1; CPHA=0 */
|
||||
regval |= SPI_CON_CKP;
|
||||
break;
|
||||
|
||||
case SPIDEV_MODE3: /* CPOL=1; CPHA=1 */
|
||||
regval |= (SPI_CON_CKP|SPI_CON_SMP);
|
||||
break;
|
||||
|
||||
default:
|
||||
DEBUGASSERT(FALSE);
|
||||
return;
|
||||
}
|
||||
|
||||
spi_putreg(priv, PIC32MX_SPI_CON_OFFSET, regval);
|
||||
|
||||
/* Save the mode so that subsequent re-configuratins will be faster */
|
||||
|
||||
#ifndef CONFIG_SPI_OWNBUS
|
||||
priv->mode = mode;
|
||||
}
|
||||
#endif
|
||||
}
|
||||
|
||||
/****************************************************************************
|
||||
* Name: spi_setbits
|
||||
*
|
||||
* Description:
|
||||
* Set the number if bits per word.
|
||||
*
|
||||
* Input Parameters:
|
||||
* dev - Device-specific state data
|
||||
* nbits - The number of bits requests
|
||||
*
|
||||
* Returned Value:
|
||||
* none
|
||||
*
|
||||
****************************************************************************/
|
||||
|
||||
static void spi_setbits(FAR struct spi_dev_s *dev, int nbits)
|
||||
{
|
||||
FAR struct pic32mx_dev_s *priv = (FAR struct pic32mx_dev_s *)dev;
|
||||
uint32_t mode;
|
||||
uint32_t regval;
|
||||
|
||||
/* Has the number of bits changed? */
|
||||
|
||||
DEBUGASSERT(priv && nbits > 7 && nbits < 17);
|
||||
#ifndef CONFIG_SPI_OWNBUS
|
||||
if (nbits != priv->nbits)
|
||||
{
|
||||
#endif
|
||||
/* Yes... Set the CON register appropriately */
|
||||
|
||||
if (nbits == 8)
|
||||
{
|
||||
mode = SPI_CON_MODE_8BIT;
|
||||
}
|
||||
else if (nbits == 16)
|
||||
{
|
||||
mode = SPI_CON_MODE_8BIT;
|
||||
}
|
||||
else if (nbits == 32)
|
||||
{
|
||||
mode = SPI_CON_MODE_8BIT;
|
||||
}
|
||||
else
|
||||
{
|
||||
spidbg("Unsupported nbits: %d\n", nbits);
|
||||
return;
|
||||
}
|
||||
|
||||
regval = spi_getreg(priv, PIC32MX_SPI_CON_OFFSET);
|
||||
regval &= ~SPI_CON_MODE_MASK;
|
||||
regval |= mode;
|
||||
regval = spi_getreg(priv, PIC32MX_SPI_CON_OFFSET);
|
||||
|
||||
/* Save the selection so the subsequence re-configurations will be faster */
|
||||
|
||||
#ifndef CONFIG_SPI_OWNBUS
|
||||
priv->nbits = nbits;
|
||||
}
|
||||
#endif
|
||||
}
|
||||
|
||||
/****************************************************************************
|
||||
* Name: spi_send
|
||||
*
|
||||
* Description:
|
||||
* Exchange one word on SPI
|
||||
*
|
||||
* Input Parameters:
|
||||
* dev - Device-specific state data
|
||||
* wd - The word to send. the size of the data is determined by the
|
||||
* number of bits selected for the SPI interface.
|
||||
*
|
||||
* Returned Value:
|
||||
* response
|
||||
*
|
||||
****************************************************************************/
|
||||
|
||||
static uint16_t spi_send(FAR struct spi_dev_s *dev, uint16_t wd)
|
||||
{
|
||||
FAR struct pic32mx_dev_s *priv = (FAR struct pic32mx_dev_s *)dev;
|
||||
|
||||
/* Write the data to transmitted to the SPI Data Register */
|
||||
|
||||
spi_putreg(priv, PIC32MX_SPI_BUF_OFFSET, (uint32_t)wd);
|
||||
|
||||
/* Wait for the SPITBE bit in the SPI Status Register to be set to 1. The
|
||||
* SPITBE bit will be set when the receive buffer is not empty.
|
||||
*/
|
||||
|
||||
while ((spi_getreg(priv, PIC32MX_SPI_STAT_OFFSET) & SPI_STAT_SPITBE) == 0);
|
||||
|
||||
/* Return the SPI data */
|
||||
|
||||
return (uint16_t)spi_getreg(priv, PIC32MX_SPI_BUF_OFFSET);
|
||||
}
|
||||
|
||||
/*************************************************************************
|
||||
* Name: spi_sndblock
|
||||
*
|
||||
* Description:
|
||||
* Send a block of data on SPI
|
||||
*
|
||||
* Input Parameters:
|
||||
* dev - Device-specific state data
|
||||
* buffer - A pointer to the buffer of data to be sent
|
||||
* nwords - the length of data to send from the buffer in number of words.
|
||||
* The wordsize is determined by the number of bits-per-word
|
||||
* selected for the SPI interface. If nbits <= 8, the data is
|
||||
* packed into uint8_t's; if nbits >8, the data is packed into uint16_t's
|
||||
*
|
||||
* Returned Value:
|
||||
* None
|
||||
*
|
||||
****************************************************************************/
|
||||
|
||||
static void spi_sndblock(FAR struct spi_dev_s *dev, FAR const void *buffer, size_t nwords)
|
||||
{
|
||||
FAR struct pic32mx_dev_s *priv = (FAR struct pic32mx_dev_s *)dev;
|
||||
FAR uint8_t *ptr = (FAR uint8_t*)buffer;
|
||||
uint32_t regval;
|
||||
uint8_t data;
|
||||
|
||||
spidbg("nwords: %d\n", nwords);
|
||||
while (nwords)
|
||||
{
|
||||
/* Write the data to transmitted to the SPI Data Register */
|
||||
|
||||
data = *ptr++;
|
||||
spi_putreg(priv, PIC32MX_SPI_BUF_OFFSET, (uint32_t)data);
|
||||
|
||||
/* Wait for the SPITBE bit in the SPI Status Register to be set to 1.
|
||||
* The SPITBE bit will be set when the receive buffer is not empty.
|
||||
*/
|
||||
|
||||
while ((spi_getreg(priv, PIC32MX_SPI_STAT_OFFSET) & SPI_STAT_SPITBE) == 0);
|
||||
|
||||
/* Read from the buffer register to clear the status bit */
|
||||
|
||||
regval = spi_getreg(priv, PIC32MX_SPI_BUF_OFFSET);
|
||||
nwords--;
|
||||
}
|
||||
}
|
||||
|
||||
/****************************************************************************
|
||||
* Name: spi_recvblock
|
||||
*
|
||||
* Description:
|
||||
* Revice a block of data from SPI
|
||||
*
|
||||
* Input Parameters:
|
||||
* dev - Device-specific state data
|
||||
* buffer - A pointer to the buffer in which to recieve data
|
||||
* nwords - the length of data that can be received in the buffer in number
|
||||
* of words. The wordsize is determined by the number of bits-per-word
|
||||
* selected for the SPI interface. If nbits <= 8, the data is
|
||||
* packed into uint8_t's; if nbits >8, the data is packed into uint16_t's
|
||||
*
|
||||
* Returned Value:
|
||||
* None
|
||||
*
|
||||
****************************************************************************/
|
||||
|
||||
static void spi_recvblock(FAR struct spi_dev_s *dev, FAR void *buffer, size_t nwords)
|
||||
{
|
||||
FAR struct pic32mx_dev_s *priv = (FAR struct pic32mx_dev_s *)dev;
|
||||
FAR uint8_t *ptr = (FAR uint8_t*)buffer;
|
||||
|
||||
spidbg("nwords: %d\n", nwords);
|
||||
while (nwords)
|
||||
{
|
||||
/* Write some dummy data to the SPI Data Register in order to clock the
|
||||
* read data.
|
||||
*/
|
||||
|
||||
spi_putreg(priv, PIC32MX_SPI_BUF_OFFSET, 0xff);
|
||||
|
||||
/* Wait for the SPITBE bit in the SPI Status Register to be set to 1.
|
||||
* The SPITBE bit will be set when the receive buffer is not empty.
|
||||
*/
|
||||
|
||||
while ((spi_getreg(priv, PIC32MX_SPI_STAT_OFFSET) & SPI_STAT_SPITBE) == 0);
|
||||
|
||||
/* Read the received data from the SPI Data Register */
|
||||
|
||||
*ptr++ = (uint8_t)spi_getreg(priv, PIC32MX_SPI_BUF_OFFSET);
|
||||
nwords--;
|
||||
}
|
||||
}
|
||||
|
||||
/****************************************************************************
|
||||
* Public Functions
|
||||
****************************************************************************/
|
||||
|
||||
/****************************************************************************
|
||||
* Name: up_spiinitialize
|
||||
*
|
||||
* Description:
|
||||
* Initialize the selected SPI port
|
||||
*
|
||||
* Input Parameter:
|
||||
* Port number (for hardware that has mutiple SPI interfaces)
|
||||
*
|
||||
* Returned Value:
|
||||
* Valid SPI device structure reference on succcess; a NULL on failure
|
||||
*
|
||||
****************************************************************************/
|
||||
|
||||
FAR struct spi_dev_s *up_spiinitialize(int port)
|
||||
{
|
||||
FAR struct pic32mx_dev_s *priv;
|
||||
irqstate_t flags;
|
||||
uint32_t regval;
|
||||
|
||||
/* Select the SPI state structure for this port */
|
||||
|
||||
#ifdef CONFIG_PIC32MX_SPI1
|
||||
if (port == 1)
|
||||
{
|
||||
priv = &g_spi1dev;
|
||||
}
|
||||
else
|
||||
#endif
|
||||
#ifdef CONFIG_PIC32MX_SPI2
|
||||
if (port == 2)
|
||||
{
|
||||
priv = &g_spi2dev;
|
||||
}
|
||||
else
|
||||
#endif
|
||||
#ifdef CONFIG_PIC32MX_SPI3
|
||||
if (port == 3)
|
||||
{
|
||||
priv = &g_spi3dev;
|
||||
}
|
||||
else
|
||||
#endif
|
||||
#ifdef CONFIG_PIC32MX_SPI4
|
||||
if (port == 4)
|
||||
{
|
||||
priv = &g_spi4dev;
|
||||
}
|
||||
else
|
||||
#endif
|
||||
{
|
||||
spidbg("Unsuppport port: %d\n", port);
|
||||
return NULL;
|
||||
}
|
||||
|
||||
/* Disable SPI interrupts */
|
||||
|
||||
flags = irqsave();
|
||||
#ifdef CONFIG_PIC32MX_SPI_INTERRUPTS
|
||||
up_disable_irq(priv->eirq);
|
||||
up_disable_irq(priv->txirq);
|
||||
up_disable_irq(priv->rxirq);
|
||||
#endif
|
||||
|
||||
/* Stop and reset the SPI module by clearing the ON bit in the CON register. */
|
||||
|
||||
spi_putreg(priv, PIC32MX_SPI_CON_OFFSET, 0);
|
||||
|
||||
/* Clear the receive buffer by reading from the BUF register */
|
||||
|
||||
regval = spi_getreg(priv, PIC32MX_SPI_BUF_OFFSET);
|
||||
|
||||
/* Set the ENHBUF bit if using Enhanced Buffer mode. */
|
||||
|
||||
#ifdef CONFIG_PIC32MX_SPI_INTERRUPTS
|
||||
/* Attach the interrupt vector */
|
||||
|
||||
ret = irq_attach(priv->vector, spi_interrupt);
|
||||
if (ret < 0)
|
||||
{
|
||||
spidbg("Failed to attach vector: %d port: %d\n", priv->vector, port);
|
||||
goto errout;
|
||||
}
|
||||
|
||||
/* Enable SPI interrupts */
|
||||
|
||||
up_enable_irq(priv->eirq);
|
||||
up_enable_irq(priv->txirq);
|
||||
up_enable_irq(priv->rxirq);
|
||||
|
||||
/* Set the interrupt priority */
|
||||
|
||||
ret = up_prioritize_irq(priv->vector, CONFIG_PIC32MX_SPI_PRIORITY)
|
||||
if (ret < 0)
|
||||
{
|
||||
spidbg("up_prioritize_irq failed: %d\n", ret);
|
||||
goto errout;
|
||||
}
|
||||
#endif
|
||||
|
||||
/* Select a default frequency of approx. 400KHz */
|
||||
|
||||
spi_setfrequency((FAR struct spi_dev_s *)priv, 400000);
|
||||
|
||||
/* Clear the SPIROV overflow bit (SPIxSTAT:6). */
|
||||
|
||||
spi_putreg(priv, PIC32MX_SPI_STATCLR_OFFSET, SPI_STAT_SPIROV);
|
||||
|
||||
/* Initial settings 8 bit + master mode + mode 0*/
|
||||
|
||||
regval = (SPI_CON_MSTEN | SPI_CON_MODE_8BIT | SPI_CON_ON);
|
||||
#ifdef CONFIG_PIC32MX_SPI_INTERRUPTS
|
||||
regval |= (SPI_CON_RTXISEL_HALF | SPI_CON_STXISEL_HALF);
|
||||
#endif
|
||||
spi_putreg(priv, PIC32MX_SPI_CON_OFFSET, regval);
|
||||
|
||||
/* Set the initial SPI configuration */
|
||||
|
||||
#ifndef CONFIG_SPI_OWNBUS
|
||||
priv->nbits = 8;
|
||||
priv->mode = SPIDEV_MODE0;
|
||||
#endif
|
||||
|
||||
/* Initialize the SPI semaphore that enforces mutually exclusive access */
|
||||
|
||||
#ifndef CONFIG_SPI_OWNBUS
|
||||
sem_init(&priv->exclsem, 0, 1);
|
||||
#endif
|
||||
irqrestore(flags);
|
||||
return &priv->spidev;
|
||||
|
||||
#ifdef CONFIG_PIC32MX_SPI_INTERRUPTS
|
||||
errout:
|
||||
irqrestore(flags);
|
||||
return NULL;
|
||||
#endif
|
||||
}
|
||||
|
||||
#endif /* CONFIG_PIC32MX_SPI */
|
||||
|
||||
@@ -1,231 +1,230 @@
|
||||
/****************************************************************************
|
||||
* arch/mips/src/pic32mx/pic32mx-spi.h
|
||||
*
|
||||
* Copyright (C) 2011 Gregory Nutt. All rights reserved.
|
||||
* Author: Gregory Nutt <gnutt@nuttx.org>
|
||||
*
|
||||
* Redistribution and use in source and binary forms, with or without
|
||||
* modification, are permitted provided that the following conditions
|
||||
* are met:
|
||||
*
|
||||
* 1. Redistributions of source code must retain the above copyright
|
||||
* notice, this list of conditions and the following disclaimer.
|
||||
* 2. Redistributions in binary form must reproduce the above copyright
|
||||
* notice, this list of conditions and the following disclaimer in
|
||||
* the documentation and/or other materials provided with the
|
||||
* distribution.
|
||||
* 3. Neither the name NuttX nor the names of its contributors may be
|
||||
* used to endorse or promote products derived from this software
|
||||
* without specific prior written permission.
|
||||
*
|
||||
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
|
||||
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
|
||||
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
|
||||
* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
|
||||
* COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
|
||||
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
|
||||
* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
|
||||
* OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
|
||||
* AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
|
||||
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
|
||||
* ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
|
||||
* POSSIBILITY OF SUCH DAMAGE.
|
||||
*
|
||||
****************************************************************************/
|
||||
|
||||
#ifndef __ARCH_MIPS_SRC_PIC32MX_PIC32MX_SPI_H
|
||||
#define __ARCH_MIPS_SRC_PIC32MX_PIC32MX_SPI_H
|
||||
|
||||
/****************************************************************************
|
||||
* Included Files
|
||||
****************************************************************************/
|
||||
|
||||
#include <nuttx/config.h>
|
||||
|
||||
#include "chip.h"
|
||||
#include "pic32mx-memorymap.h"
|
||||
|
||||
/****************************************************************************
|
||||
* Pre-Processor Definitions
|
||||
****************************************************************************/
|
||||
/* Register Offsets *********************************************************/
|
||||
|
||||
#define PIC32MX_SPI_CON_OFFSET 0x0000 /* SPI control register */
|
||||
#define PIC32MX_SPI_CONCLR_OFFSET 0x0004 /* SPI control clear register */
|
||||
#define PIC32MX_SPI_CONSET_OFFSET 0x0008 /* SPI control set register */
|
||||
#define PIC32MX_SPI_CONINV_OFFSET 0x000c /* SPI control invert register */
|
||||
#define PIC32MX_SPI_STAT_OFFSET 0x0010 /* SPI status register */
|
||||
#define PIC32MX_SPI_STATSET_OFFSET 0x0018 /* SPI status set register */
|
||||
#define PIC32MX_SPI_BUF_OFFSET 0x0020 /* SPI buffer register */
|
||||
#define PIC32MX_SPI_BRG_OFFSET 0x0030 /* SPI baud rate register */
|
||||
#define PIC32MX_SPI_BRGCLR_OFFSET 0x0034 /* SPI baud rate clear register */
|
||||
#define PIC32MX_SPI_BRGSET_OFFSET 0x0038 /* SPI baud rate set register */
|
||||
#define PIC32MX_SPI_BRGINV_OFFSET 0x003c /* SPI baud rate invert register */
|
||||
|
||||
/* Register Addresses *******************************************************/
|
||||
|
||||
#ifdef PIC32MX_SPI1_K1BASE
|
||||
# define PIC32MX_SPI1_CON (PIC32MX_SPI1_K1BASE+PIC32MX_SPI_CON_OFFSET)
|
||||
# define PIC32MX_SPI1_CONCLR (PIC32MX_SPI1_K1BASE+PIC32MX_SPI_CONCLR_OFFSET)
|
||||
# define PIC32MX_SPI1_CONSET (PIC32MX_SPI1_K1BASE+PIC32MX_SPI_CONSET_OFFSET)
|
||||
# define PIC32MX_SPI1_CONINV (PIC32MX_SPI1_K1BASE+PIC32MX_SPI_CONINV_OFFSET)
|
||||
# define PIC32MX_SPI1_STAT (PIC32MX_SPI1_K1BASE+PIC32MX_SPI_STAT_OFFSET)
|
||||
# define PIC32MX_SPI1_STATSET (PIC32MX_SPI1_K1BASE+PIC32MX_SPI_STATSET_OFFSET)
|
||||
# define PIC32MX_SPI1_BUF (PIC32MX_SPI1_K1BASE+PIC32MX_SPI_BUF_OFFSET)
|
||||
# define PIC32MX_SPI1_BRG (PIC32MX_SPI1_K1BASE+PIC32MX_SPI_BRG_OFFSET)
|
||||
# define PIC32MX_SPI1_BRGCLR (PIC32MX_SPI1_K1BASE+PIC32MX_SPI_BRGCLR_OFFSET)
|
||||
# define PIC32MX_SPI1_BRGSET (PIC32MX_SPI1_K1BASE+PIC32MX_SPI_BRGSET_OFFSET)
|
||||
# define PIC32MX_SPI1_BRGINV (PIC32MX_SPI1_K1BASE+PIC32MX_SPI_BRGINV_OFFSET)
|
||||
#endif
|
||||
|
||||
#ifdef PIC32MX_SPI2_K1BASE
|
||||
# define PIC32MX_SPI2_CON (PIC32MX_SPI2_K1BASE+PIC32MX_SPI_CON_OFFSET)
|
||||
# define PIC32MX_SPI2_CONCLR (PIC32MX_SPI2_K1BASE+PIC32MX_SPI_CONCLR_OFFSET)
|
||||
# define PIC32MX_SPI2_CONSET (PIC32MX_SPI2_K1BASE+PIC32MX_SPI_CONSET_OFFSET)
|
||||
# define PIC32MX_SPI2_CONINV (PIC32MX_SPI2_K1BASE+PIC32MX_SPI_CONINV_OFFSET)
|
||||
# define PIC32MX_SPI2_STAT (PIC32MX_SPI2_K1BASE+PIC32MX_SPI_STAT_OFFSET)
|
||||
# define PIC32MX_SPI2_STATSET (PIC32MX_SPI2_K1BASE+PIC32MX_SPI_STATSET_OFFSET)
|
||||
# define PIC32MX_SPI2_BUF (PIC32MX_SPI2_K1BASE+PIC32MX_SPI_BUF_OFFSET)
|
||||
# define PIC32MX_SPI2_BRG (PIC32MX_SPI2_K1BASE+PIC32MX_SPI_BRG_OFFSET)
|
||||
# define PIC32MX_SPI2_BRGCLR (PIC32MX_SPI2_K1BASE+PIC32MX_SPI_BRGCLR_OFFSET)
|
||||
# define PIC32MX_SPI2_BRGSET (PIC32MX_SPI2_K1BASE+PIC32MX_SPI_BRGSET_OFFSET)
|
||||
# define PIC32MX_SPI2_BRGINV (PIC32MX_SPI2_K1BASE+PIC32MX_SPI_BRGINV_OFFSET)
|
||||
#endif
|
||||
|
||||
#ifdef PIC32MX_SPI3_K1BASE
|
||||
# define PIC32MX_SPI3_CON (PIC32MX_SPI3_K1BASE+PIC32MX_SPI_CON_OFFSET)
|
||||
# define PIC32MX_SPI3_CONCLR (PIC32MX_SPI3_K1BASE+PIC32MX_SPI_CONCLR_OFFSET)
|
||||
# define PIC32MX_SPI3_CONSET (PIC32MX_SPI3_K1BASE+PIC32MX_SPI_CONSET_OFFSET)
|
||||
# define PIC32MX_SPI3_CONINV (PIC32MX_SPI3_K1BASE+PIC32MX_SPI_CONINV_OFFSET)
|
||||
# define PIC32MX_SPI3_STAT (PIC32MX_SPI3_K1BASE+PIC32MX_SPI_STAT_OFFSET)
|
||||
# define PIC32MX_SPI3_STATSET (PIC32MX_SPI3_K1BASE+PIC32MX_SPI_STATSET_OFFSET)
|
||||
# define PIC32MX_SPI3_BUF (PIC32MX_SPI3_K1BASE+PIC32MX_SPI_BUF_OFFSET)
|
||||
# define PIC32MX_SPI3_BRG (PIC32MX_SPI3_K1BASE+PIC32MX_SPI_BRG_OFFSET)
|
||||
# define PIC32MX_SPI3_BRGCLR (PIC32MX_SPI3_K1BASE+PIC32MX_SPI_BRGCLR_OFFSET)
|
||||
# define PIC32MX_SPI3_BRGSET (PIC32MX_SPI3_K1BASE+PIC32MX_SPI_BRGSET_OFFSET)
|
||||
# define PIC32MX_SPI3_BRGINV (PIC32MX_SPI3_K1BASE+PIC32MX_SPI_BRGINV_OFFSET)
|
||||
#endif
|
||||
|
||||
#ifdef PIC32MX_SPI4_K1BASE
|
||||
# define PIC32MX_SPI4_CON (PIC32MX_SPI4_K1BASE+PIC32MX_SPI_CON_OFFSET)
|
||||
# define PIC32MX_SPI4_CONCLR (PIC32MX_SPI4_K1BASE+PIC32MX_SPI_CONCLR_OFFSET)
|
||||
# define PIC32MX_SPI4_CONSET (PIC32MX_SPI4_K1BASE+PIC32MX_SPI_CONSET_OFFSET)
|
||||
# define PIC32MX_SPI4_CONINV (PIC32MX_SPI4_K1BASE+PIC32MX_SPI_CONINV_OFFSET)
|
||||
# define PIC32MX_SPI4_STAT (PIC32MX_SPI4_K1BASE+PIC32MX_SPI_STAT_OFFSET)
|
||||
# define PIC32MX_SPI4_STATSET (PIC32MX_SPI4_K1BASE+PIC32MX_SPI_STATSET_OFFSET)
|
||||
# define PIC32MX_SPI4_BUF (PIC32MX_SPI4_K1BASE+PIC32MX_SPI_BUF_OFFSET)
|
||||
# define PIC32MX_SPI4_BRG (PIC32MX_SPI4_K1BASE+PIC32MX_SPI_BRG_OFFSET)
|
||||
# define PIC32MX_SPI4_BRGCLR (PIC32MX_SPI4_K1BASE+PIC32MX_SPI_BRGCLR_OFFSET)
|
||||
# define PIC32MX_SPI4_BRGSET (PIC32MX_SPI4_K1BASE+PIC32MX_SPI_BRGSET_OFFSET)
|
||||
# define PIC32MX_SPI4_BRGINV (PIC32MX_SPI4_K1BASE+PIC32MX_SPI_BRGINV_OFFSET)
|
||||
#endif
|
||||
|
||||
/* Register Bit-Field Definitions *******************************************/
|
||||
|
||||
/* SPI control register */
|
||||
|
||||
#if defined(CHIP_PIC32MX5) || defined(CHIP_PIC32MX6) || defined(CHIP_PIC32MX7)
|
||||
# define SPI_CON_RTXISEL_SHIFT (0) /* Bits 0-1: SPI Receive Buffer Full Interrupt Mode */
|
||||
# define SPI_CON_RTXISEL_MASK (3 << SPI_CON_RTXISEL_SHIFT)
|
||||
# define SPI_CON_RTXISEL_EMPTY (0 << SPI_CON_RTXISEL_SHIFT) /* Buffer empty*/
|
||||
# define SPI_CON_RTXISEL_NEMPTY (1 << SPI_CON_RTXISEL_SHIFT) /* Buffer not empty*/
|
||||
# define SPI_CON_RTXISEL_HALF (2 << SPI_CON_RTXISEL_SHIFT) /* Buffer half full or more */
|
||||
# define SPI_CON_RTXISEL_FULL (3 << SPI_CON_RTXISEL_SHIFT) /* Buffer full */
|
||||
# define SPI_CON_STXISEL_SHIFT (2) /* Bits 2-3: SPI Transmit Buffer Empty Interrupt Mode */
|
||||
# define SPI_CON_STXISEL_MASK (3 << SPI_CON_STXISEL_SHIFT)
|
||||
# define SPI_CON_STXISEL_DONE (0 << SPI_CON_STXISEL_SHIFT) /* Buffer empty (and data shifted out) */
|
||||
# define SPI_CON_STXISEL_EMPTY (1 << SPI_CON_STXISEL_SHIFT) /* Buffer empty */
|
||||
# define SPI_CON_STXISEL_HALF (2 << SPI_CON_STXISEL_SHIFT) /* Buffer half empty or more */
|
||||
# define SPI_CON_STXISEL_NFULL (3 << SPI_CON_STXISEL_SHIFT) /* Buffer not full */
|
||||
#endif
|
||||
/* Bit 4: Reserved */
|
||||
#define SPI_CON_MSTEN (1 << 5) /* Bits 5: Master mode enable */
|
||||
#define SPI_CON_CKP (1 << 6) /* Bits 6: Clock polarity select */
|
||||
#define SPI_CON_SSEN (1 << 7) /* Bits 7: Slave select enable (slave mode) */
|
||||
#define SPI_CON_CKE (1 << 8) /* Bits 8: SPI clock edge select */
|
||||
#define SPI_CON_SMP (1 << 9) /* Bits 9: SPI data input sample phase */
|
||||
#define SPI_CON_MODE_SHIFT (10) /* Bits 10-11: 32/16-Bit Communication Select */
|
||||
#define SPI_CON_MODE_MASK (3 << SPI_CON_MODE_SHIFT)
|
||||
#define SPI_CON_MODE32 (1 << 11) /* Bits 11: xx */
|
||||
# define SPI_CON_MODE_8BIT (0 << SPI_CON_MODE_SHIFT) /* 8-bit data width */
|
||||
# define SPI_CON_MODE_16BIT (1 << SPI_CON_MODE_SHIFT) /* 16-bit data width */
|
||||
# define SPI_CON_MODE_32BIT (2 << SPI_CON_MODE_SHIFT) /* 2-bit data width */
|
||||
#define SPI_CON_DISSDO (1 << 12) /* Bits 12: Disable SDOx pin */
|
||||
#define SPI_CON_SIDL (1 << 13) /* Bits 13: Stop in idle mode */
|
||||
#define SPI_CON_FRZ (1 << 14) /* Bits 14: Freeze in debug exception */
|
||||
#define SPI_CON_ON (1 << 15) /* Bits 15: SPI peripheral on */
|
||||
#define SPI_CON_ENHBUF (1 << 16) /* Bits 16: Enhanced buffer enable */
|
||||
#define SPI_CON_SPIFE (1 << 17) /* Bits 17: Frame sync pulse edge select */
|
||||
/* Bits 18-23: Reserved */
|
||||
#if defined(CHIP_PIC32MX5) || defined(CHIP_PIC32MX6) || defined(CHIP_PIC32MX7)
|
||||
# define SPI_CON_FRMCNT_SHIFT (24) /* Bits 24-26: Frame Sync Pulse Counter bits */
|
||||
# define SPI_CON_FRMCNT_MASK (7 << SPI_CON_FRMCNT_SHIFT)
|
||||
# define SPI_CON_FRMCNT_CHAR1 (0 << SPI_CON_FRMCNT_SHIFT) /* Frame sync pulse each char */
|
||||
# define SPI_CON_FRMCNT_CHAR2 (1 << SPI_CON_FRMCNT_SHIFT) /* Frame sync pulse every 2 chars */
|
||||
# define SPI_CON_FRMCNT_CHAR4 (2 << SPI_CON_FRMCNT_SHIFT) /* Frame sync pulse every 4 chars */
|
||||
# define SPI_CON_FRMCNT_CHAR8 (3 << SPI_CON_FRMCNT_SHIFT) /* Frame sync pulse every 8 chars */
|
||||
# define SPI_CON_FRMCNT_CHAR16 (4 << SPI_CON_FRMCNT_SHIFT) /* Frame sync pulse every 16 chars */
|
||||
# define SPI_CON_FRMCNT_CHAR32 (5 << SPI_CON_FRMCNT_SHIFT) /* Frame sync pulse every 32 chars */
|
||||
# define SPI_CON_FRMSYPW (1 << 27) /* Bits 27: Frame sync pulse width */
|
||||
# define SPI_CON_MSSEN (1 << 28) /* Bits 28: Master mode slave select enable */
|
||||
#endif
|
||||
#define SPI_CON_FRMPOL (1 << 29) /* Bits 29: Frame sync polarity */
|
||||
#define SPI_CON_FRMSYNC (1 << 30) /* Bits 30: Frame sync pulse direction control on SSx pin */
|
||||
#define SPI_CON_FRMEN (1 << 31) /* Bits 31: Framed SPI support */
|
||||
|
||||
/* SPI status register */
|
||||
|
||||
#if defined(CHIP_PIC32MX3) || defined(CHIP_PIC32MX4)
|
||||
# define SPI_STAT_SPIRBF (1 << 0) /* Bits 0: SPI receive buffer full status */
|
||||
# define SPI_STAT_SPITBE (1 << 3) /* Bits 3: SPI transmit buffer empty status */
|
||||
# define SPI_STAT_SPIROV (1 << 6) /* Bits 6: Receive overflow flag */
|
||||
# define SPI_STAT_SPIBUSY (1 << 11) /* Bits 11: SPI activity status */
|
||||
#elif defined(CHIP_PIC32MX5) || defined(CHIP_PIC32MX6) || defined(CHIP_PIC32MX7)
|
||||
# define SPI_STAT_SPIRBF (1 << 0) /* Bits 0: SPI receive buffer full status */
|
||||
# define SPI_STAT_SPITBF (1 << 1) /* Bits 1: SPI transmit buffer full status */
|
||||
# define SPI_STAT_SPITBE (1 << 3) /* Bits 3: SPI transmit buffer empty status */
|
||||
# define SPI_STAT_SPIRBE (1 << 5) /* Bits 5: RX FIFO Empty */
|
||||
# define SPI_STAT_SPIROV (1 << 6) /* Bits 6: Receive overflow flag */
|
||||
# define SPI_STAT_SRMT (1 << 7) /* Bits 6: Shift Register Empty */
|
||||
# define SPI_STAT_SPITUR (1 << 6) /* Bits 8: Transmit under run */
|
||||
# define SPI_STAT_SPIBUSY (1 << 11) /* Bits 11: SPI activity status */
|
||||
# define SPI_STAT_TXBUFELM_SHIFT (16) /* Bits 16-20: Transmit Buffer Element Count bits */
|
||||
# define SPI_STAT_TXBUFELM_MASK (31 << SPI_STAT_TXBUFELM_SHIFT)
|
||||
# define SPI_STAT_RXBUFELM_SHIFT (24) /* Bits 24-28: Receive Buffer Element Count bits */
|
||||
# define SPI_STAT_RXBUFELM_MASK (31 << SPI_STAT_RXBUFELM_SHIFT)
|
||||
#endif
|
||||
|
||||
/* SPI buffer register (32-bits wide) */
|
||||
|
||||
/* SPI baud rate register */
|
||||
|
||||
#define SPI_BRG_MASK 0x1ff
|
||||
|
||||
/****************************************************************************
|
||||
* Public Types
|
||||
****************************************************************************/
|
||||
|
||||
#ifndef __ASSEMBLY__
|
||||
|
||||
/****************************************************************************
|
||||
* Inline Functions
|
||||
****************************************************************************/
|
||||
|
||||
/****************************************************************************
|
||||
* Public Function Prototypes
|
||||
****************************************************************************/
|
||||
|
||||
#ifdef __cplusplus
|
||||
#define EXTERN extern "C"
|
||||
extern "C" {
|
||||
#else
|
||||
#define EXTERN extern
|
||||
#endif
|
||||
|
||||
#undef EXTERN
|
||||
#ifdef __cplusplus
|
||||
}
|
||||
#endif
|
||||
|
||||
#endif /* __ASSEMBLY__ */
|
||||
#endif /* __ARCH_MIPS_SRC_PIC32MX_PIC32MX_SPI_H */
|
||||
/****************************************************************************
|
||||
* arch/mips/src/pic32mx/pic32mx-spi.h
|
||||
*
|
||||
* Copyright (C) 2011-2012 Gregory Nutt. All rights reserved.
|
||||
* Author: Gregory Nutt <gnutt@nuttx.org>
|
||||
*
|
||||
* Redistribution and use in source and binary forms, with or without
|
||||
* modification, are permitted provided that the following conditions
|
||||
* are met:
|
||||
*
|
||||
* 1. Redistributions of source code must retain the above copyright
|
||||
* notice, this list of conditions and the following disclaimer.
|
||||
* 2. Redistributions in binary form must reproduce the above copyright
|
||||
* notice, this list of conditions and the following disclaimer in
|
||||
* the documentation and/or other materials provided with the
|
||||
* distribution.
|
||||
* 3. Neither the name NuttX nor the names of its contributors may be
|
||||
* used to endorse or promote products derived from this software
|
||||
* without specific prior written permission.
|
||||
*
|
||||
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
|
||||
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
|
||||
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
|
||||
* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
|
||||
* COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
|
||||
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
|
||||
* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
|
||||
* OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
|
||||
* AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
|
||||
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
|
||||
* ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
|
||||
* POSSIBILITY OF SUCH DAMAGE.
|
||||
*
|
||||
****************************************************************************/
|
||||
|
||||
#ifndef __ARCH_MIPS_SRC_PIC32MX_PIC32MX_SPI_H
|
||||
#define __ARCH_MIPS_SRC_PIC32MX_PIC32MX_SPI_H
|
||||
|
||||
/****************************************************************************
|
||||
* Included Files
|
||||
****************************************************************************/
|
||||
|
||||
#include <nuttx/config.h>
|
||||
|
||||
#include "chip.h"
|
||||
#include "pic32mx-memorymap.h"
|
||||
|
||||
/****************************************************************************
|
||||
* Pre-Processor Definitions
|
||||
****************************************************************************/
|
||||
/* Register Offsets *********************************************************/
|
||||
|
||||
#define PIC32MX_SPI_CON_OFFSET 0x0000 /* SPI control register */
|
||||
#define PIC32MX_SPI_CONCLR_OFFSET 0x0004 /* SPI control clear register */
|
||||
#define PIC32MX_SPI_CONSET_OFFSET 0x0008 /* SPI control set register */
|
||||
#define PIC32MX_SPI_CONINV_OFFSET 0x000c /* SPI control invert register */
|
||||
#define PIC32MX_SPI_STAT_OFFSET 0x0010 /* SPI status register */
|
||||
#define PIC32MX_SPI_STATCLR_OFFSET 0x0014 /* SPI status clear register */
|
||||
#define PIC32MX_SPI_BUF_OFFSET 0x0020 /* SPI buffer register */
|
||||
#define PIC32MX_SPI_BRG_OFFSET 0x0030 /* SPI baud rate register */
|
||||
#define PIC32MX_SPI_BRGCLR_OFFSET 0x0034 /* SPI baud rate clear register */
|
||||
#define PIC32MX_SPI_BRGSET_OFFSET 0x0038 /* SPI baud rate set register */
|
||||
#define PIC32MX_SPI_BRGINV_OFFSET 0x003c /* SPI baud rate invert register */
|
||||
|
||||
/* Register Addresses *******************************************************/
|
||||
|
||||
#ifdef PIC32MX_SPI1_K1BASE
|
||||
# define PIC32MX_SPI1_CON (PIC32MX_SPI1_K1BASE+PIC32MX_SPI_CON_OFFSET)
|
||||
# define PIC32MX_SPI1_CONCLR (PIC32MX_SPI1_K1BASE+PIC32MX_SPI_CONCLR_OFFSET)
|
||||
# define PIC32MX_SPI1_CONSET (PIC32MX_SPI1_K1BASE+PIC32MX_SPI_CONSET_OFFSET)
|
||||
# define PIC32MX_SPI1_CONINV (PIC32MX_SPI1_K1BASE+PIC32MX_SPI_CONINV_OFFSET)
|
||||
# define PIC32MX_SPI1_STAT (PIC32MX_SPI1_K1BASE+PIC32MX_SPI_STAT_OFFSET)
|
||||
# define PIC32MX_SPI1_STATCLR (PIC32MX_SPI1_K1BASE+PIC32MX_SPI_STATCLR_OFFSET)
|
||||
# define PIC32MX_SPI1_BUF (PIC32MX_SPI1_K1BASE+PIC32MX_SPI_BUF_OFFSET)
|
||||
# define PIC32MX_SPI1_BRG (PIC32MX_SPI1_K1BASE+PIC32MX_SPI_BRG_OFFSET)
|
||||
# define PIC32MX_SPI1_BRGCLR (PIC32MX_SPI1_K1BASE+PIC32MX_SPI_BRGCLR_OFFSET)
|
||||
# define PIC32MX_SPI1_BRGSET (PIC32MX_SPI1_K1BASE+PIC32MX_SPI_BRGSET_OFFSET)
|
||||
# define PIC32MX_SPI1_BRGINV (PIC32MX_SPI1_K1BASE+PIC32MX_SPI_BRGINV_OFFSET)
|
||||
#endif
|
||||
|
||||
#ifdef PIC32MX_SPI2_K1BASE
|
||||
# define PIC32MX_SPI2_CON (PIC32MX_SPI2_K1BASE+PIC32MX_SPI_CON_OFFSET)
|
||||
# define PIC32MX_SPI2_CONCLR (PIC32MX_SPI2_K1BASE+PIC32MX_SPI_CONCLR_OFFSET)
|
||||
# define PIC32MX_SPI2_CONSET (PIC32MX_SPI2_K1BASE+PIC32MX_SPI_CONSET_OFFSET)
|
||||
# define PIC32MX_SPI2_CONINV (PIC32MX_SPI2_K1BASE+PIC32MX_SPI_CONINV_OFFSET)
|
||||
# define PIC32MX_SPI2_STAT (PIC32MX_SPI2_K1BASE+PIC32MX_SPI_STAT_OFFSET)
|
||||
# define PIC32MX_SPI2_STATCLR (PIC32MX_SPI2_K1BASE+PIC32MX_SPI_STATCLR_OFFSET)
|
||||
# define PIC32MX_SPI2_BUF (PIC32MX_SPI2_K1BASE+PIC32MX_SPI_BUF_OFFSET)
|
||||
# define PIC32MX_SPI2_BRG (PIC32MX_SPI2_K1BASE+PIC32MX_SPI_BRG_OFFSET)
|
||||
# define PIC32MX_SPI2_BRGCLR (PIC32MX_SPI2_K1BASE+PIC32MX_SPI_BRGCLR_OFFSET)
|
||||
# define PIC32MX_SPI2_BRGSET (PIC32MX_SPI2_K1BASE+PIC32MX_SPI_BRGSET_OFFSET)
|
||||
# define PIC32MX_SPI2_BRGINV (PIC32MX_SPI2_K1BASE+PIC32MX_SPI_BRGINV_OFFSET)
|
||||
#endif
|
||||
|
||||
#ifdef PIC32MX_SPI3_K1BASE
|
||||
# define PIC32MX_SPI3_CON (PIC32MX_SPI3_K1BASE+PIC32MX_SPI_CON_OFFSET)
|
||||
# define PIC32MX_SPI3_CONCLR (PIC32MX_SPI3_K1BASE+PIC32MX_SPI_CONCLR_OFFSET)
|
||||
# define PIC32MX_SPI3_CONSET (PIC32MX_SPI3_K1BASE+PIC32MX_SPI_CONSET_OFFSET)
|
||||
# define PIC32MX_SPI3_CONINV (PIC32MX_SPI3_K1BASE+PIC32MX_SPI_CONINV_OFFSET)
|
||||
# define PIC32MX_SPI3_STAT (PIC32MX_SPI3_K1BASE+PIC32MX_SPI_STAT_OFFSET)
|
||||
# define PIC32MX_SPI3_STATCLR (PIC32MX_SPI3_K1BASE+PIC32MX_SPI_STATCLR_OFFSET)
|
||||
# define PIC32MX_SPI3_BUF (PIC32MX_SPI3_K1BASE+PIC32MX_SPI_BUF_OFFSET)
|
||||
# define PIC32MX_SPI3_BRG (PIC32MX_SPI3_K1BASE+PIC32MX_SPI_BRG_OFFSET)
|
||||
# define PIC32MX_SPI3_BRGCLR (PIC32MX_SPI3_K1BASE+PIC32MX_SPI_BRGCLR_OFFSET)
|
||||
# define PIC32MX_SPI3_BRGSET (PIC32MX_SPI3_K1BASE+PIC32MX_SPI_BRGSET_OFFSET)
|
||||
# define PIC32MX_SPI3_BRGINV (PIC32MX_SPI3_K1BASE+PIC32MX_SPI_BRGINV_OFFSET)
|
||||
#endif
|
||||
|
||||
#ifdef PIC32MX_SPI4_K1BASE
|
||||
# define PIC32MX_SPI4_CON (PIC32MX_SPI4_K1BASE+PIC32MX_SPI_CON_OFFSET)
|
||||
# define PIC32MX_SPI4_CONCLR (PIC32MX_SPI4_K1BASE+PIC32MX_SPI_CONCLR_OFFSET)
|
||||
# define PIC32MX_SPI4_CONSET (PIC32MX_SPI4_K1BASE+PIC32MX_SPI_CONSET_OFFSET)
|
||||
# define PIC32MX_SPI4_CONINV (PIC32MX_SPI4_K1BASE+PIC32MX_SPI_CONINV_OFFSET)
|
||||
# define PIC32MX_SPI4_STAT (PIC32MX_SPI4_K1BASE+PIC32MX_SPI_STAT_OFFSET)
|
||||
# define PIC32MX_SPI4_STATCLR (PIC32MX_SPI4_K1BASE+PIC32MX_SPI_STATCLR_OFFSET)
|
||||
# define PIC32MX_SPI4_BUF (PIC32MX_SPI4_K1BASE+PIC32MX_SPI_BUF_OFFSET)
|
||||
# define PIC32MX_SPI4_BRG (PIC32MX_SPI4_K1BASE+PIC32MX_SPI_BRG_OFFSET)
|
||||
# define PIC32MX_SPI4_BRGCLR (PIC32MX_SPI4_K1BASE+PIC32MX_SPI_BRGCLR_OFFSET)
|
||||
# define PIC32MX_SPI4_BRGSET (PIC32MX_SPI4_K1BASE+PIC32MX_SPI_BRGSET_OFFSET)
|
||||
# define PIC32MX_SPI4_BRGINV (PIC32MX_SPI4_K1BASE+PIC32MX_SPI_BRGINV_OFFSET)
|
||||
#endif
|
||||
|
||||
/* Register Bit-Field Definitions *******************************************/
|
||||
|
||||
/* SPI control register */
|
||||
|
||||
#if defined(CHIP_PIC32MX5) || defined(CHIP_PIC32MX6) || defined(CHIP_PIC32MX7)
|
||||
# define SPI_CON_RTXISEL_SHIFT (0) /* Bits 0-1: SPI Receive Buffer Full Interrupt Mode */
|
||||
# define SPI_CON_RTXISEL_MASK (3 << SPI_CON_RTXISEL_SHIFT)
|
||||
# define SPI_CON_RTXISEL_EMPTY (0 << SPI_CON_RTXISEL_SHIFT) /* Buffer empty*/
|
||||
# define SPI_CON_RTXISEL_NEMPTY (1 << SPI_CON_RTXISEL_SHIFT) /* Buffer not empty*/
|
||||
# define SPI_CON_RTXISEL_HALF (2 << SPI_CON_RTXISEL_SHIFT) /* Buffer half full or more */
|
||||
# define SPI_CON_RTXISEL_FULL (3 << SPI_CON_RTXISEL_SHIFT) /* Buffer full */
|
||||
# define SPI_CON_STXISEL_SHIFT (2) /* Bits 2-3: SPI Transmit Buffer Empty Interrupt Mode */
|
||||
# define SPI_CON_STXISEL_MASK (3 << SPI_CON_STXISEL_SHIFT)
|
||||
# define SPI_CON_STXISEL_DONE (0 << SPI_CON_STXISEL_SHIFT) /* Buffer empty (and data shifted out) */
|
||||
# define SPI_CON_STXISEL_EMPTY (1 << SPI_CON_STXISEL_SHIFT) /* Buffer empty */
|
||||
# define SPI_CON_STXISEL_HALF (2 << SPI_CON_STXISEL_SHIFT) /* Buffer half empty or more */
|
||||
# define SPI_CON_STXISEL_NFULL (3 << SPI_CON_STXISEL_SHIFT) /* Buffer not full */
|
||||
#endif
|
||||
/* Bit 4: Reserved */
|
||||
#define SPI_CON_MSTEN (1 << 5) /* Bits 5: Master mode enable */
|
||||
#define SPI_CON_CKP (1 << 6) /* Bits 6: Clock polarity select */
|
||||
#define SPI_CON_SSEN (1 << 7) /* Bits 7: Slave select enable (slave mode) */
|
||||
#define SPI_CON_CKE (1 << 8) /* Bits 8: SPI clock edge select */
|
||||
#define SPI_CON_SMP (1 << 9) /* Bits 9: SPI data input sample phase */
|
||||
#define SPI_CON_MODE_SHIFT (10) /* Bits 10-11: 32/16-Bit Communication Select */
|
||||
#define SPI_CON_MODE_MASK (3 << SPI_CON_MODE_SHIFT)
|
||||
# define SPI_CON_MODE_8BIT (0 << SPI_CON_MODE_SHIFT) /* 8-bit data width */
|
||||
# define SPI_CON_MODE_16BIT (1 << SPI_CON_MODE_SHIFT) /* 16-bit data width */
|
||||
# define SPI_CON_MODE_32BIT (2 << SPI_CON_MODE_SHIFT) /* 2-bit data width */
|
||||
#define SPI_CON_DISSDO (1 << 12) /* Bits 12: Disable SDOx pin */
|
||||
#define SPI_CON_SIDL (1 << 13) /* Bits 13: Stop in idle mode */
|
||||
#define SPI_CON_FRZ (1 << 14) /* Bits 14: Freeze in debug exception */
|
||||
#define SPI_CON_ON (1 << 15) /* Bits 15: SPI peripheral on */
|
||||
#define SPI_CON_ENHBUF (1 << 16) /* Bits 16: Enhanced buffer enable */
|
||||
#define SPI_CON_SPIFE (1 << 17) /* Bits 17: Frame sync pulse edge select */
|
||||
/* Bits 18-23: Reserved */
|
||||
#if defined(CHIP_PIC32MX5) || defined(CHIP_PIC32MX6) || defined(CHIP_PIC32MX7)
|
||||
# define SPI_CON_FRMCNT_SHIFT (24) /* Bits 24-26: Frame Sync Pulse Counter bits */
|
||||
# define SPI_CON_FRMCNT_MASK (7 << SPI_CON_FRMCNT_SHIFT)
|
||||
# define SPI_CON_FRMCNT_CHAR1 (0 << SPI_CON_FRMCNT_SHIFT) /* Frame sync pulse each char */
|
||||
# define SPI_CON_FRMCNT_CHAR2 (1 << SPI_CON_FRMCNT_SHIFT) /* Frame sync pulse every 2 chars */
|
||||
# define SPI_CON_FRMCNT_CHAR4 (2 << SPI_CON_FRMCNT_SHIFT) /* Frame sync pulse every 4 chars */
|
||||
# define SPI_CON_FRMCNT_CHAR8 (3 << SPI_CON_FRMCNT_SHIFT) /* Frame sync pulse every 8 chars */
|
||||
# define SPI_CON_FRMCNT_CHAR16 (4 << SPI_CON_FRMCNT_SHIFT) /* Frame sync pulse every 16 chars */
|
||||
# define SPI_CON_FRMCNT_CHAR32 (5 << SPI_CON_FRMCNT_SHIFT) /* Frame sync pulse every 32 chars */
|
||||
# define SPI_CON_FRMSYPW (1 << 27) /* Bits 27: Frame sync pulse width */
|
||||
# define SPI_CON_MSSEN (1 << 28) /* Bits 28: Master mode slave select enable */
|
||||
#endif
|
||||
#define SPI_CON_FRMPOL (1 << 29) /* Bits 29: Frame sync polarity */
|
||||
#define SPI_CON_FRMSYNC (1 << 30) /* Bits 30: Frame sync pulse direction control on SSx pin */
|
||||
#define SPI_CON_FRMEN (1 << 31) /* Bits 31: Framed SPI support */
|
||||
|
||||
/* SPI status register */
|
||||
|
||||
#if defined(CHIP_PIC32MX3) || defined(CHIP_PIC32MX4)
|
||||
# define SPI_STAT_SPIRBF (1 << 0) /* Bits 0: SPI receive buffer full status */
|
||||
# define SPI_STAT_SPITBE (1 << 3) /* Bits 3: SPI transmit buffer empty status */
|
||||
# define SPI_STAT_SPIROV (1 << 6) /* Bits 6: Receive overflow flag */
|
||||
# define SPI_STAT_SPIBUSY (1 << 11) /* Bits 11: SPI activity status */
|
||||
#elif defined(CHIP_PIC32MX5) || defined(CHIP_PIC32MX6) || defined(CHIP_PIC32MX7)
|
||||
# define SPI_STAT_SPIRBF (1 << 0) /* Bits 0: SPI receive buffer full status */
|
||||
# define SPI_STAT_SPITBF (1 << 1) /* Bits 1: SPI transmit buffer full status */
|
||||
# define SPI_STAT_SPITBE (1 << 3) /* Bits 3: SPI transmit buffer empty status */
|
||||
# define SPI_STAT_SPIRBE (1 << 5) /* Bits 5: RX FIFO Empty */
|
||||
# define SPI_STAT_SPIROV (1 << 6) /* Bits 6: Receive overflow flag */
|
||||
# define SPI_STAT_SRMT (1 << 7) /* Bits 6: Shift Register Empty */
|
||||
# define SPI_STAT_SPITUR (1 << 6) /* Bits 8: Transmit under run */
|
||||
# define SPI_STAT_SPIBUSY (1 << 11) /* Bits 11: SPI activity status */
|
||||
# define SPI_STAT_TXBUFELM_SHIFT (16) /* Bits 16-20: Transmit Buffer Element Count bits */
|
||||
# define SPI_STAT_TXBUFELM_MASK (31 << SPI_STAT_TXBUFELM_SHIFT)
|
||||
# define SPI_STAT_RXBUFELM_SHIFT (24) /* Bits 24-28: Receive Buffer Element Count bits */
|
||||
# define SPI_STAT_RXBUFELM_MASK (31 << SPI_STAT_RXBUFELM_SHIFT)
|
||||
#endif
|
||||
|
||||
/* SPI buffer register (32-bits wide) */
|
||||
|
||||
/* SPI baud rate register */
|
||||
|
||||
#define SPI_BRG_MASK 0x1ff
|
||||
|
||||
/****************************************************************************
|
||||
* Public Types
|
||||
****************************************************************************/
|
||||
|
||||
#ifndef __ASSEMBLY__
|
||||
|
||||
/****************************************************************************
|
||||
* Inline Functions
|
||||
****************************************************************************/
|
||||
|
||||
/****************************************************************************
|
||||
* Public Function Prototypes
|
||||
****************************************************************************/
|
||||
|
||||
#ifdef __cplusplus
|
||||
#define EXTERN extern "C"
|
||||
extern "C" {
|
||||
#else
|
||||
#define EXTERN extern
|
||||
#endif
|
||||
|
||||
#undef EXTERN
|
||||
#ifdef __cplusplus
|
||||
}
|
||||
#endif
|
||||
|
||||
#endif /* __ASSEMBLY__ */
|
||||
#endif /* __ARCH_MIPS_SRC_PIC32MX_PIC32MX_SPI_H */
|
||||
|
||||
@@ -452,10 +452,12 @@ selected as follow:
|
||||
Where <subdir> is one of the following:
|
||||
|
||||
ostest:
|
||||
-------
|
||||
This configuration directory, performs a simple OS test using
|
||||
apps/examples/ostest.
|
||||
|
||||
nsh:
|
||||
----
|
||||
Configures the NuttShell (nsh) located at apps/examples/nsh. The
|
||||
Configuration enables only the serial NSH interface.
|
||||
|
||||
@@ -489,7 +491,8 @@ Where <subdir> is one of the following:
|
||||
to enable the USB mass storage device. However, this device cannot
|
||||
work until support for the SD card is also incorporated.
|
||||
|
||||
usbnsh
|
||||
usbnsh:
|
||||
-------
|
||||
This is another NSH example. If differs from the 'nsh' configuration
|
||||
above in that this configurations uses a USB serial device for console
|
||||
I/O. This configuration was created to support the "DB-DP11212 PIC32
|
||||
|
||||
Reference in New Issue
Block a user