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Merge pull request #433 from wangzhouwang/master 

[bsp] add uart4 driver for stm32f10x bsp.
This commit is contained in:
Bernard Xiong 2015-03-11 20:12:18 +08:00
parent a2fbc5f5a8 351dd923e3
commit 4888957d22
1 changed files with 82 additions and 0 deletions
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82
bsp/stm32f10x/drivers/usart.c
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@ -35,6 +35,12 @@
#define UART3_GPIO_RX GPIO_Pin_11
#define UART3_GPIO GPIOB
/* USART4 */
#define UART4_GPIO_TX GPIO_Pin_10
#define UART4_GPIO_RX GPIO_Pin_11
#define UART4_GPIO GPIOC
/* STM32 uart driver */
struct stm32_uart
{
@ -264,6 +270,45 @@ void USART3_IRQHandler(void)
}
#endif /* RT_USING_UART3 */
#if defined(RT_USING_UART4)
/* UART4 device driver structure */
struct stm32_uart uart4 =
{
UART4,
UART4_IRQn,
};
struct rt_serial_device serial4;
void UART4_IRQHandler(void)
{
struct stm32_uart* uart;
uart = &uart4;
/* enter interrupt */
rt_interrupt_enter();
if(USART_GetITStatus(uart->uart_device, USART_IT_RXNE) != RESET)
{
rt_hw_serial_isr(&serial4, RT_SERIAL_EVENT_RX_IND);
/* clear interrupt */
USART_ClearITPendingBit(uart->uart_device, USART_IT_RXNE);
}
if (USART_GetITStatus(uart->uart_device, USART_IT_TC) != RESET)
{
/* clear interrupt */
USART_ClearITPendingBit(uart->uart_device, USART_IT_TC);
}
if (USART_GetFlagStatus(uart->uart_device, USART_FLAG_ORE) == SET)
{
stm32_getc(&serial4);
}
/* leave interrupt */
rt_interrupt_leave();
}
#endif /* RT_USING_UART3 */
static void RCC_Configuration(void)
{
#if defined(RT_USING_UART1)
@ -286,6 +331,14 @@ static void RCC_Configuration(void)
/* Enable UART clock */
RCC_APB1PeriphClockCmd(RCC_APB1Periph_USART3, ENABLE);
#endif /* RT_USING_UART3 */
#if defined(RT_USING_UART4)
/* Enable UART GPIO clocks */
RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOC, ENABLE);
/* Enable UART clock */
RCC_APB1PeriphClockCmd(RCC_APB1Periph_UART4, ENABLE);
#endif /* RT_USING_UART4 */
}
static void GPIO_Configuration(void)
@ -326,6 +379,18 @@ static void GPIO_Configuration(void)
GPIO_InitStructure.GPIO_Pin = UART3_GPIO_TX;
GPIO_Init(UART3_GPIO, &GPIO_InitStructure);
#endif /* RT_USING_UART3 */
#if defined(RT_USING_UART4)
/* Configure USART Rx/tx PIN */
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IN_FLOATING;
GPIO_InitStructure.GPIO_Pin = UART4_GPIO_RX;
GPIO_Init(UART4_GPIO, &GPIO_InitStructure);
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_PP;
GPIO_InitStructure.GPIO_Pin = UART4_GPIO_TX;
GPIO_Init(UART4_GPIO, &GPIO_InitStructure);
#endif /* RT_USING_UART4 */
}
static void NVIC_Configuration(struct stm32_uart* uart)
@ -393,4 +458,21 @@ void rt_hw_usart_init(void)
RT_DEVICE_FLAG_RDWR | RT_DEVICE_FLAG_INT_RX,
uart);
#endif /* RT_USING_UART3 */
#if defined(RT_USING_UART4)
uart = &uart4;
config.baud_rate = BAUD_RATE_115200;
serial4.ops = &stm32_uart_ops;
serial4.config = config;
NVIC_Configuration(&uart4);
/* register UART4 device */
rt_hw_serial_register(&serial4, "uart4",
RT_DEVICE_FLAG_RDWR | RT_DEVICE_FLAG_INT_RX,
uart);
#endif /* RT_USING_UART4 */
}