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Add single-wire UART support to STM32 serial driver

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git-svn-id: svn://svn.code.sf.net/p/nuttx/code/trunk@5552 42af7a65-404d-4744-a932-0658087f49c3
This commit is contained in:
patacongo 2013-01-23 14:38:13 +00:00
parent 7527f63b6d
commit 713530127c
2 changed files with 44 additions and 2 deletions
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19
arch/arm/src/stm32/Kconfig
View File

@ -457,32 +457,38 @@ config STM32_USART1
bool "USART1"
default n
select ARCH_HAVE_USART1
select STM32_USART
config STM32_USART2
bool "USART2"
default n
select ARCH_HAVE_USART2
select STM32_USART
config STM32_USART3
bool "USART3"
default n
select ARCH_HAVE_USART3
select STM32_USART
config STM32_UART4
bool "UART4"
default n
select ARCH_HAVE_UART4
select STM32_USART
config STM32_UART5
bool "UART5"
default n
select ARCH_HAVE_UART5
select STM32_USART
config STM32_USART6
bool "USART6"
default n
depends on STM32_STM32F20XX || STM32_STM32F40XX
select ARCH_HAVE_USART6
select STM32_USART
config STM32_USB
bool "USB Device"
@ -1804,8 +1810,11 @@ config STM32_TIM14_DAC2
endchoice
bool STM32_USART
bool
menu "U[S]ART Configuration"
depends on STM32_USART1 || STM32_USART2 || STM32_USART3 || STM32_USART4 || STM32_USART5 || STM32_USART6
depends on STM32_USART
config USART1_RS485
bool "RS-485 on USART1"
@ -1968,6 +1977,14 @@ config SERIAL_TERMIOS
endmenu
config STM32_USART_SINGLEWIRE
bool "Single Wire Support"
default n
depends on STM32_USART
---help---
Enable single wire UART support. The option enables support for the
TIOCSSINGLEWIRE ioctl in the STM32 serial driver.
menu "SPI Configuration"
depends on STM32_SPI

27
arch/arm/src/stm32/stm32_serial.c
View File

@ -1,7 +1,7 @@
/****************************************************************************
* arch/arm/src/stm32/stm32_serial.c
*
* Copyright (C) 2009-2012 Gregory Nutt. All rights reserved.
* Copyright (C) 2009-2013 Gregory Nutt. All rights reserved.
* Author: Gregory Nutt <gnutt@nuttx.org>
*
* Redistribution and use in source and binary forms, with or without
@ -1401,6 +1401,31 @@ static int up_ioctl(struct file *filep, int cmd, unsigned long arg)
}
break;
#ifdef CONFIG_STM32_USART_SINGLEWIRE
case TIOCSSINGLEWIRE:
{
/* Change the TX port to be open-drain/push-pull and enable/disable
* half-duplex mode.
*/
uint32_t cr = up_serialin(priv, STM32_USART_CR3_OFFSET);
if (arg == SER_SINGLEWIRE_ENABLED)
{
stm32_configgpio(priv->tx_gpio | GPIO_OPENDRAIN);
cr |= USART_CR3_HDSEL;
}
else
{
stm32_configgpio(priv->tx_gpio | GPIO_PUSHPULL);
cr &= ~USART_CR3_HDSEL;
}
up_serialout(priv, STM32_USART_CR3_OFFSET, cr);
}
break;
#endif
#ifdef CONFIG_SERIAL_TERMIOS
case TCGETS:
{