stm32读取串口数据并赋值给数据缓存区
时间: 2023-12-21 17:07:04 浏览: 72
在STM32中,可以使用UART串口通信模块来进行串口数据的读取。以下是一个简单的示例代码,可以将读取到的串口数据存储到数据缓存区中:
```c
#include "stm32f4xx.h"
#define BUFFER_SIZE 16
uint8_t rx_buffer[BUFFER_SIZE];
uint8_t rx_index = 0;
void USART2_IRQHandler(void)
{
if(USART_GetITStatus(USART2, USART_IT_RXNE) != RESET)
{
// 读取串口数据到缓存区
rx_buffer[rx_index] = USART_ReceiveData(USART2);
rx_index++;
// 如果缓存区已满,重置缓存区
if(rx_index >= BUFFER_SIZE)
{
rx_index = 0;
}
}
}
int main(void)
{
// 初始化USART2串口
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_Init(USART2, &USART_InitStructure);
// 使能USART2
USART_Cmd(USART2, ENABLE);
// 使能USART2接收中断
USART_ITConfig(USART2, USART_IT_RXNE, ENABLE);
while(1)
{
// 在这里可以对数据缓存区进行处理
// ...
}
}
```
在上述代码中,我们使用了USART2串口模块,并且开启了接收中断。当有数据到达时,中断服务函数USART2_IRQHandler会被调用,在其中将读取到的数据存储到缓存区rx_buffer中。在主循环中,可以对缓存区中的数据进行处理。需要注意的是,缓存区大小需要根据实际需求进行调整,以免遇到数据溢出的情况。
阅读全文
相关推荐


















