mirror of
https://gitee.com/mirrors_PX4/PX4-Autopilot.git
synced 2026-10-22 22:13:34 +08:00
Beginning of an SMTPE11 touchscreen/IO expander driver
git-svn-id: https://nuttx.svn.sourceforge.net/svnroot/nuttx/trunk@4700 7fd9a85b-ad96-42d3-883c-3090e2eb8679
This commit is contained in:
patacongo
@@ -47,6 +47,10 @@ ifeq ($(CONFIG_INPUT_ADS7843E),y)
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CSRCS += ads7843e.c
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endif
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ifeq ($(CONFIG_INPUT_STMPE11),y)
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CSRCS += stmpe11_base.c
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endif
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# Include input device driver build support
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DEPPATH += --dep-path input
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+117
-10
@@ -44,28 +44,135 @@
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* Included Files
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********************************************************************************************/
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#include <nuttx/config.h>
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#include <semaphore.h>
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#include <nuttx/wqueue.h>
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#include <nuttx/input/stmpe11.h>
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#if defined(CONFIG_INPUT) && defined(CONFIG_INPUT_STMPE11)
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/********************************************************************************************
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* Pre-Processor Definitions
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********************************************************************************************/
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/* Configuration ****************************************************************************/
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/* Reference counting is partially implemented, but not needed in the current design.
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*/
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#undef CONFIG_STMPE11_REFCNT
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/* No support for the SPI interface yet */
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#ifdef CONFIG_STMPE11_SPI
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# error "Only the STMPE11 I2C interface is supported by this driver"
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#endif
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/* Driver support ***************************************************************************/
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/* This format is used to construct the /dev/input[n] device driver path. It defined here
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* so that it will be used consistently in all places.
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*/
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#define DEV_FORMAT "/dev/input%d"
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#define DEV_NAMELEN 16
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/********************************************************************************************
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* Public Types
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********************************************************************************************/
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/* This describes the state of one contact */
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enum stmpe11_contact_3
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{
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CONTACT_NONE = 0, /* No contact */
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CONTACT_DOWN, /* First contact */
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CONTACT_MOVE, /* Same contact, possibly different position */
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CONTACT_UP, /* Contact lost */
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};
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/* This structure describes the results of one STMPE11 sample */
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struct stmpe11_sample_s
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{
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uint8_t id; /* Sampled touch point ID */
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uint8_t contact; /* Contact state (see enum stmpe11_contact_e) */
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uint16_t x; /* Measured X position */
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uint16_t y; /* Measured Y position */
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uint16_t z; /* Measured Z position */
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};
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/* This structure represents the state of the SMTPE11 driver */
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struct stmpe11_dev_s
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{
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#ifdef CONFIG_STMPE11_MULTIPLE
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FAR struct stmpe11_dev_s *flink; /* Supports a singly linked list of drivers */
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#endif
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#ifdef CONFIG_STMPE11_REFCNT
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uint8_t crefs; /* Number of times the device has been opened */
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#endif
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uint8_t nwaiters; /* Number of threads waiting for STMPE11 data */
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uint8_t inuse; /* SMTPE11 pins in use */
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uint8_t id; /* Current touch point ID (TSC only) */
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uint8_t minor; /* Touchscreen minor device number (TSC only) */
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volatile bool penchange; /* An unreported event is buffered (TSC only) */
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sem_t devsem; /* Manages exclusive access to this structure */
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sem_t waitsem; /* Used to wait for the availability of data */
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uint32_t threshx; /* Thresholded X value (TSC only) */
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uint32_t threshy; /* Thresholded Y value (TSC only) */
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#ifdef CONFIG_STMPE11_SPI
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FAR struct spi_dev_s *spi; /* Saved SPI driver instance */
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#else
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FAR struct i2c_dev_s *i2c; /* Saved I2C driver instance */
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#endif
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FAR struct stmpe11_config_s *config; /* Board configuration data (TSC only) */
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struct work_s work; /* Supports the interrupt handling "bottom half" */
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struct stmpe11_sample_s sample; /* Last sampled touch point data (TSC only) */
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/* The following is a list if poll structures of threads waiting for
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* driver events. The 'struct pollfd' reference for each open is also
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* retained in the f_priv field of the 'struct file'.
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*/
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#ifndef CONFIG_DISABLE_POLL
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struct pollfd *fds[CONFIG_STMPE11_NPOLLWAITERS];
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#endif
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};
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/********************************************************************************************
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* Public Function Prototypes
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********************************************************************************************/
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#ifdef __cplusplus
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#define EXTERN extern "C"
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extern "C" {
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#else
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#define EXTERN extern
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#endif
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/********************************************************************************************
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* Name: stmpe11_getreg8
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*
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* Description:
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* Read from an 8-bit STMPE11 register
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*
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********************************************************************************************/
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#undef EXTERN
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#ifdef __cplusplus
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}
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#endif
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static uint8_t stmpe11_getreg8(FAR struct stmpe11_dev_s *priv, uint8_t regaddr);
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/********************************************************************************************
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* Name: stmpe11_putreg8
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*
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* Description:
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* Write a value to an 8-bit STMPE11 register
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*
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********************************************************************************************/
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void stmpe11_putreg8(FAR struct stmpe11_dev_s *priv, uint8_t regaddr, uint8_t regval);
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/********************************************************************************************
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* Name: stmpe11_getreg16
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*
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* Description:
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* Read 16-bits of data from an STMPE-11 register
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*
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********************************************************************************************/
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uint16_t stmpe11_getreg16(FAR struct stmpe11_dev_s *priv, uint8_t regaddr);
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#endif /* CONFIG_INPUT && CONFIG_INPUT_STMPE11 */
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#endif /* __DRIVERS_INPUT_STMPE11_H */
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@@ -0,0 +1,366 @@
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/****************************************************************************
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* drivers/input/stmpe11_base.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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* References:
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* "STMPE811 S-Touch® advanced resistive touchscreen controller with 8-bit
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* GPIO expander," Doc ID 14489 Rev 6, CD00186725, STMicroelectronics"
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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 <errno.h>
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#include <debug.h>
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#include <nuttx/arch.h>
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#include <nuttx/input/stmpe11.h>
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#include "stmpe11.h"
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#if defined(CONFIG_INPUT) && defined(CONFIG_INPUT_STMPE11)
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/****************************************************************************
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* Private Types
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****************************************************************************/
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/****************************************************************************
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* Private Data
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****************************************************************************/
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/* If only a single STMPE11 device is supported, then the driver state
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* structure may as well be pre-allocated.
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*/
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#ifndef CONFIG_STMPE11_MULTIPLE
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static struct stmpe11_dev_s g_stmpe11;
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/* Otherwise, we will need to maintain allocated driver instances in a list */
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#else
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static struct stmpe11_dev_s *g_stmpe11list;
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#endif
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/****************************************************************************
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* Private Functions
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****************************************************************************/
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/****************************************************************************
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* Name: stmpe11_checkid
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*
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* Description:
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* Read and verify the STMPE11 chip ID
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*
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****************************************************************************/
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static int stmpe11_checkid(FAR struct stmpe11_dev_s *priv)
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{
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uint16_t devid = 0;
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/* Read device ID */
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devid = stmpe11_getreg8(priv, STMPE11_CHIP_ID);
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devid = (uint32_t)(devid << 8);
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devid |= (uint32_t)stmpe11_getreg8(priv, STMPE11_CHIP_ID+1);
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ivdbg("devid: %04x\n", devid);
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if (devid != (uint16_t)CHIP_ID)
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{
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/* ID is not Correct */
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return -ENODEV;
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}
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return OK;
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}
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/****************************************************************************
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* Name: stmpe11_reset
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*
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* Description:
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* Reset the STMPE11
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*
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****************************************************************************/
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static void stmpe11_reset(FAR struct stmpe11_dev_s *priv)
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{
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/* Power Down the STMPE11 */
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stmpe11_putreg8(priv, STMPE11_SYS_CTRL1, SYS_CTRL1_SOFTRESET);
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/* Wait a bit */
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up_mdelay(20);
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/* Then power on again. All registers will be in their reset state. */
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stmpe11_putreg8(priv, STMPE11_SYS_CTRL1, 0);
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}
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/****************************************************************************
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* Public Functions
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****************************************************************************/
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/****************************************************************************
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* Name: stmpe11_instantiate
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*
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* Description:
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* Instantiate and configure the STMPE11 device driver to use the provided
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* I2C or SPIdevice instance.
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*
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* Input Parameters:
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* dev - An I2C or SPI driver instance
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* config - Persistant board configuration data
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*
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* Returned Value:
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* A non-zero handle is returned on success. This handle may then be used
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* to configure the STMPE11 driver as necessary. A NULL handle value is
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* returned on failure.
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*
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****************************************************************************/
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#ifdef CONFIG_STMPE11_SPI
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STMPE11_HANDLE stmpe11_instantiate(FAR struct spi_dev_s *dev,
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FAR struct stmpe11_config_s *config)
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#else
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STMPE11_HANDLE stmpe11_instantiate(FAR struct i2c_dev_s *dev,
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FAR struct stmpe11_config_s *config)
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#endif
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{
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FAR struct stmpe11_dev_s *priv;
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int ret;
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/* On entry the following is assumed:
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*
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* I2C initialization ready
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* GPIO pins already configured.
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*/
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/* Allocate the device state structure */
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#ifdef CONFIG_STMPE11_MULTIPLE
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priv = (FAR struct stmpe11_dev_s *)kzalloc(sizeof(struct stmpe11_dev_s));
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if (!priv)
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{
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return -ENOMEM;
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}
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/* And save the device structure in the list of STMPE11 so that we can find it later */
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priv->flink = g_stmpe11list;
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g_stmpe11list = priv;
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#else
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/* Use the one-and-only STMPE11 driver instance */
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priv = &g_stmpe11;
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#endif
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/* Initialize the device state structure */
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#ifdef CONFIG_STMPE11_SPI
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priv->spi = dev;
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#else
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priv->i2c = dev;
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#endif
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/* Read and verify the STMPE11 chip ID */
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ret = stmpe11_checkid(priv);
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if (ret < 0)
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{
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#ifdef CONFIG_STMPE11_MULTIPLE
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kfree(priv);
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#endif
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return NULL;
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}
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|
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/* Generate STMPE11 Software reset */
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stmpe11_reset(priv);
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return (STMPE11_HANDLE)priv;
|
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}
|
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|
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/****************************************************************************
|
||||
* Name: stmpe11_getreg8
|
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*
|
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* Description:
|
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* Read from an 8-bit STMPE11 register
|
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*
|
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****************************************************************************/
|
||||
|
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#ifdef CONFIG_STMPE11_I2C
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uint8_t stmpe11_getreg8(FAR struct stmpe11_dev_s *priv, uint8_t regaddr)
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{
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/* 8-bit data read sequence:
|
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*
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* Start - I2C_Write_Address - STMPE11_Reg_Address -
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* Repeated_Start - I2C_Read_Address - STMPE11_Read_Data - STOP
|
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*/
|
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struct i2c_msg_s msg[2];
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uint8_t regval;
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int ret;
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|
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/* Setup 8-bit STMPE11 address write message */
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msg[0].addr = priv->config->address; /* 7-bit address */
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msg[0].flags = 0; /* Write transaction, beginning with START */
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msg[0].buffer = ®addr; /* Transfer from this address */
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msg[0].length = 1; /* Send one byte following the address
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* (no STOP) */
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/* Set up the 8-bit STMPE11 data read message */
|
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msg[1].addr = priv->config->address; /* 7-bit address */
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msg[1].flags = I2C_M_READ; /* Read transaction, beginning with Re-START */
|
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msg[1].buffer = ®val; /* Transfer to this address */
|
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msg[1].length = 1; /* Receive one byte following the address
|
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* (then STOP) */
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/* Perform the transfer */
|
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ret = I2C_TRANSFER(priv->i2c, msg, 2);
|
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if (ret < 0)
|
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{
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idbg("I2C_TRANSFER failed: %d\n", ret);
|
||||
return 0;
|
||||
}
|
||||
|
||||
return regval;
|
||||
}
|
||||
#endif
|
||||
|
||||
/****************************************************************************
|
||||
* Name: stmpe11_putreg8
|
||||
*
|
||||
* Description:
|
||||
* Write a value to an 8-bit STMPE11 register
|
||||
*
|
||||
****************************************************************************/
|
||||
|
||||
#ifdef CONFIG_STMPE11_I2C
|
||||
void stmpe11_putreg8(FAR struct stmpe11_dev_s *priv,
|
||||
uint8_t regaddr, uint8_t regval)
|
||||
{
|
||||
/* 8-bit data read sequence:
|
||||
*
|
||||
* Start - I2C_Write_Address - STMPE11_Reg_Address - STMPE11_Write_Data - STOP
|
||||
*/
|
||||
|
||||
struct i2c_msg_s msg;
|
||||
uint8_t txbuffer[2];
|
||||
int ret;
|
||||
|
||||
/* Setup to the data to be transferred. Two bytes: The STMPE11 register
|
||||
* address followed by one byte of data.
|
||||
*/
|
||||
|
||||
txbuffer[0] = regaddr;
|
||||
txbuffer[1] = regval;
|
||||
|
||||
/* Setup 8-bit STMPE11 address write message */
|
||||
|
||||
msg.addr = priv->config->address; /* 7-bit address */
|
||||
msg.flags = 0; /* Write transaction, beginning with START */
|
||||
msg.buffer = txbuffer; /* Transfer from this address */
|
||||
msg.length = 2; /* Send two byte following the address
|
||||
* (then STOP) */
|
||||
|
||||
/* Perform the transfer */
|
||||
|
||||
ret = I2C_TRANSFER(priv->i2c, &msg, 1);
|
||||
if (ret < 0)
|
||||
{
|
||||
idbg("I2C_TRANSFER failed: %d\n", ret);
|
||||
}
|
||||
}
|
||||
#endif
|
||||
|
||||
/****************************************************************************
|
||||
* Name: stmpe11_getreg16
|
||||
*
|
||||
* Description:
|
||||
* Read 16-bits of data from an STMPE-11 register
|
||||
*
|
||||
****************************************************************************/
|
||||
|
||||
#ifdef CONFIG_STMPE11_I2C
|
||||
uint16_t stmpe11_getreg16(FAR struct stmpe11_dev_s *priv, uint8_t regaddr)
|
||||
{
|
||||
/* 16-bit data read sequence:
|
||||
*
|
||||
* Start - I2C_Write_Address - STMPE11_Reg_Address -
|
||||
* Repeated_Start - I2C_Read_Address - STMPE11_Read_Data_1 -
|
||||
* STMPE11_Read_Data_2 - STOP
|
||||
*/
|
||||
|
||||
|
||||
struct i2c_msg_s msg[2];
|
||||
uint8_t rxbuffer[2];
|
||||
int ret;
|
||||
|
||||
/* Setup 8-bit STMPE11 address write message */
|
||||
|
||||
msg[0].addr = priv->config->address; /* 7-bit address */
|
||||
msg[0].flags = 0; /* Write transaction, beginning with START */
|
||||
msg[0].buffer = ®addr; /* Transfer from this address */
|
||||
msg[0].length = 1; /* Send one byte following the address
|
||||
* (no STOP) */
|
||||
|
||||
/* Set up the 8-bit STMPE11 data read message */
|
||||
|
||||
msg[1].addr = priv->config->address; /* 7-bit address */
|
||||
msg[1].flags = I2C_M_READ; /* Read transaction, beginning with Re-START */
|
||||
msg[1].buffer = rxbuffer; /* Transfer to this address */
|
||||
msg[1].length = 2; /* Receive two bytes following the address
|
||||
* (then STOP) */
|
||||
|
||||
/* Perform the transfer */
|
||||
|
||||
ret = I2C_TRANSFER(priv->i2c, msg, 2);
|
||||
if (ret < 0)
|
||||
{
|
||||
idbg("I2C_TRANSFER failed: %d\n", ret);
|
||||
return 0;
|
||||
}
|
||||
|
||||
return (uint16_t)rxbuffer[0] << 16 | (uint16_t)rxbuffer[1];
|
||||
}
|
||||
#endif
|
||||
|
||||
#endif /* CONFIG_INPUT && CONFIG_INPUT_STMPE11 */
|
||||
|
||||
Reference in New Issue
Block a user