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stm32f10x usart add interrupt tx mode

This commit is contained in:
Aubr.Cool 2017-01-19 09:56:36 +08:00
parent 6fa8bfd92a
commit 4008a0a5fb
1 changed files with 29 additions and 6 deletions
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35
bsp/stm32f10x/drivers/usart.c
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@ -14,6 +14,7 @@
* 2013-05-13 aozima update for kehong-lingtai.
* 2015-01-31 armink make sure the serial transmit complete in putc()
* 2016-05-13 armink add DMA Rx mode
* 2017-01-19 aubr.cool add interrupt Tx mode
*/
#include "stm32f10x.h"
@ -144,8 +145,21 @@ static int stm32_putc(struct rt_serial_device *serial, char c)
RT_ASSERT(serial != RT_NULL);
uart = (struct stm32_uart *)serial->parent.user_data;
uart->uart_device->DR = c;
while (!(uart->uart_device->SR & USART_FLAG_TC));
if(serial->parent.open_flag & RT_DEVICE_FLAG_INT_TX)
{
if(!(uart->uart_device->SR & USART_FLAG_TXE))
{
USART_ITConfig(uart->uart_device, USART_IT_TC, ENABLE);
return -1;
}
uart->uart_device->DR = c;
USART_ITConfig(uart->uart_device, USART_IT_TC, ENABLE);
}
else
{
uart->uart_device->DR = c;
while (!(uart->uart_device->SR & USART_FLAG_TC));
}
return 1;
}
@ -244,6 +258,11 @@ static void uart_isr(struct rt_serial_device *serial) {
if (USART_GetITStatus(uart->uart_device, USART_IT_TC) != RESET)
{
/* clear interrupt */
if(serial->parent.open_flag & RT_DEVICE_FLAG_INT_TX)
{
rt_hw_serial_isr(serial, RT_SERIAL_EVENT_TX_DONE);
}
USART_ITConfig(uart->uart_device, USART_IT_RXNE, DISABLE);
USART_ClearITPendingBit(uart->uart_device, USART_IT_TC);
}
if (USART_GetFlagStatus(uart->uart_device, USART_FLAG_ORE) == SET)
@ -561,7 +580,8 @@ void rt_hw_usart_init(void)
/* register UART1 device */
rt_hw_serial_register(&serial1, "uart1",
RT_DEVICE_FLAG_RDWR | RT_DEVICE_FLAG_INT_RX | RT_DEVICE_FLAG_DMA_RX,
RT_DEVICE_FLAG_RDWR | RT_DEVICE_FLAG_INT_RX |
RT_DEVICE_FLAG_INT_TX | RT_DEVICE_FLAG_DMA_RX,
uart);
#endif /* RT_USING_UART1 */
@ -576,7 +596,8 @@ void rt_hw_usart_init(void)
/* register UART2 device */
rt_hw_serial_register(&serial2, "uart2",
RT_DEVICE_FLAG_RDWR | RT_DEVICE_FLAG_INT_RX | RT_DEVICE_FLAG_DMA_RX,
RT_DEVICE_FLAG_RDWR | RT_DEVICE_FLAG_INT_RX |
RT_DEVICE_FLAG_INT_TX | RT_DEVICE_FLAG_DMA_RX,
uart);
#endif /* RT_USING_UART2 */
@ -592,7 +613,8 @@ void rt_hw_usart_init(void)
/* register UART3 device */
rt_hw_serial_register(&serial3, "uart3",
RT_DEVICE_FLAG_RDWR | RT_DEVICE_FLAG_INT_RX | RT_DEVICE_FLAG_DMA_RX,
RT_DEVICE_FLAG_RDWR | RT_DEVICE_FLAG_INT_RX |
RT_DEVICE_FLAG_INT_TX | RT_DEVICE_FLAG_DMA_RX,
uart);
#endif /* RT_USING_UART3 */
@ -608,7 +630,8 @@ void rt_hw_usart_init(void)
/* register UART4 device */
rt_hw_serial_register(&serial4, "uart4",
RT_DEVICE_FLAG_RDWR | RT_DEVICE_FLAG_INT_RX | RT_DEVICE_FLAG_DMA_RX,
RT_DEVICE_FLAG_RDWR | RT_DEVICE_FLAG_INT_RX |
RT_DEVICE_FLAG_INT_TX | RT_DEVICE_FLAG_DMA_RX,
uart);
#endif /* RT_USING_UART4 */
}