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Add infrastructure to support RS-485 on the LPC43xx (logic still incomplete)

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git-svn-id: https://nuttx.svn.sourceforge.net/svnroot/nuttx/trunk@4958 7fd9a85b-ad96-42d3-883c-3090e2eb8679
This commit is contained in:
patacongo
2012-07-20 16:58:39 +00:00
parent bfeaf56050
commit 3dd3e950cb
6 changed files with 106 additions and 2 deletions
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nuttx/include/nuttx/serial/tioctl.h
+22 -1
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@@ -160,9 +160,21 @@
#define TIOCMIWAIT _TIOC(0x0028) /* Wait for a change on serial input line(s): void */
#define TIOCGICOUNT _TIOC(0x0029) /* Read serial port interrupt count: FAR struct serial_icounter_struct */
/* RS-485 Support */
#define TIOCSRS485 _TIOC(0x002a) /* Set RS485 mode, arg: pointer to struct serial_rs485 */
#define TIOCGRS485 _TIOC(0x002b) /* Get RS485 mode, arg: pointer to struct serial_rs485 */
/* Debugging */
#define TIOCSERGSTRUCT _TIOC(0x002a) /* Get device TTY structure */
#define TIOCSERGSTRUCT _TIOC(0x002c) /* Get device TTY structure */
/* Definitions used in struct serial_rs485 (Linux compatible) */
#define SER_RS485_ENABLED (1 << 0) /* Enable/disble RS-485 support */
#define SER_RS485_RTS_ON_SEND (1 << 1) /* Logic level for RTS pin when sending */
#define SER_RS485_RTS_AFTER_SEND (1 << 2) /* Logic level for RTS pin after sent */
#define SER_RS485_RX_DURING_TX (1 << 4)
/********************************************************************************************
* Public Type Definitions
@@ -178,6 +190,15 @@ struct winsize
/* uint16_t ws_ypixel; unused */
};
/* Structure used with TIOCSRS485 and TIOCGRS485 (Linux compatible) */
struct serial_rs485
{
uint32_t flags /* See SER_RS485_* definitions */
uint32_t delay_rts_before_send; /* Delay before send (milliseconds) */
uint32_t delay_rts_after_send; /* Delay after send (milliseconds) */
};
/********************************************************************************************
* Public Function Prototypes
********************************************************************************************/