stm32f103c8t6串口5中断接收示例
时间: 2023-08-01 11:12:02 浏览: 43
以下是一个基于stm32f103c8t6的串口5中断接收示例:
```
#include "stm32f10x.h"
#define BUFFER_SIZE 256
volatile uint8_t rx_buffer[BUFFER_SIZE];
volatile uint8_t rx_index = 0;
volatile uint8_t rx_data = 0;
void USART5_Init(void);
void USART5_IRQHandler(void);
int main(void)
{
USART5_Init();
while (1)
{
// do something else
}
}
void USART5_Init(void)
{
RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOC | RCC_APB2Periph_AFIO, ENABLE);
RCC_APB1PeriphClockCmd(RCC_APB1Periph_UART5, ENABLE);
GPIO_InitTypeDef GPIO_InitStructure;
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_12;
GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IN_FLOATING;
GPIO_Init(GPIOC, &GPIO_InitStructure);
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_2;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_PP;
GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
GPIO_Init(GPIOD, &GPIO_InitStructure);
USART_InitTypeDef USART_InitStructure;
USART_InitStructure.USART_BaudRate = 115200;
USART_InitStructure.USART_WordLength = USART_WordLength_8b;
USART_InitStructure.USART_StopBits = USART_StopBits_1;
USART_InitStructure.USART_Parity = USART_Parity_No;
USART_InitStructure.USART_HardwareFlowControl = USART_HardwareFlowControl_None;
USART_InitStructure.USART_Mode = USART_Mode_Rx | USART_Mode_Tx;
USART_Init(UART5, &USART_InitStructure);
USART_ITConfig(UART5, USART_IT_RXNE, ENABLE);
NVIC_InitTypeDef NVIC_InitStructure;
NVIC_InitStructure.NVIC_IRQChannel = UART5_IRQn;
NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 0;
NVIC_InitStructure.NVIC_IRQChannelSubPriority = 0;
NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;
NVIC_Init(&NVIC_InitStructure);
USART_Cmd(UART5, ENABLE);
}
void USART5_IRQHandler(void)
{
if(USART_GetITStatus(UART5, USART_IT_RXNE) != RESET)
{
rx_data = USART_ReceiveData(UART5);
if(rx_index < BUFFER_SIZE)
{
rx_buffer[rx_index++] = rx_data;
}
}
}
```
这个示例实现了USART5的初始化和中断接收功能。其中,USART5被配置为115200波特率,8位数据位,1位停止位,无奇偶校验,无硬件流控制,同时开启接收和发送模式。GPIOC的GPIO_Pin_12被配置成浮空输入模式,GPIOD的GPIO_Pin_2被配置成复用推挽输出模式。在USART5中断处理函数USART5_IRQHandler中,判断是否接收到数据,如果接收到数据,将数据存储到rx_buffer数组中。在主函数中,可以通过读取rx_buffer数组来获取接收到的数据。
需要注意的是,在使用中断接收数据时,需要开启中断并且实现中断处理函数。同时,需要使用一个缓存数组来存储接收到的数据,以避免数据丢失。