stm32使用固件库串口接收程序
时间: 2023-08-02 15:06:31 浏览: 81
STM32的串口接收程序
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好的,下面是一个使用stm32固件库进行串口接收的程序示例:
```c
#include "stm32f10x.h"
#define BUF_SIZE 64
uint8_t rx_buf[BUF_SIZE];
uint8_t rx_idx = 0;
void USART1_IRQHandler(void)
{
if (USART_GetITStatus(USART1, USART_IT_RXNE) != RESET)
{
uint8_t ch = USART_ReceiveData(USART1);
if (rx_idx < BUF_SIZE)
{
rx_buf[rx_idx++] = ch;
}
}
}
int main(void)
{
USART_InitTypeDef USART_InitStructure;
NVIC_InitTypeDef NVIC_InitStructure;
// 使能USART1和GPIOA的时钟
RCC_APB2PeriphClockCmd(RCC_APB2Periph_USART1 | RCC_APB2Periph_GPIOA, ENABLE);
// 配置PA9为USART1的Tx引脚,PA10为USART1的Rx引脚
GPIO_InitTypeDef GPIO_InitStructure;
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_9;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_PP;
GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
GPIO_Init(GPIOA, &GPIO_InitStructure);
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_10;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IN_FLOATING;
GPIO_Init(GPIOA, &GPIO_InitStructure);
// 配置USART1
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(USART1, &USART_InitStructure);
// 配置USART1中断
USART_ITConfig(USART1, USART_IT_RXNE, ENABLE);
NVIC_InitStructure.NVIC_IRQChannel = USART1_IRQn;
NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 0;
NVIC_InitStructure.NVIC_IRQChannelSubPriority = 0;
NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;
NVIC_Init(&NVIC_InitStructure);
// 启动USART1
USART_Cmd(USART1, ENABLE);
while (1)
{
// 处理接收到的数据
if (rx_idx > 0)
{
// TODO: 处理接收到的数据
rx_idx = 0;
}
}
}
```
在上面的程序中,我们使用了USART1和GPIOA,将PA9作为USART1的Tx引脚,PA10作为USART1的Rx引脚。我们首先初始化了USART1和GPIOA,并启用了USART1的中断,当USART1接收到数据时,会触发USART1的中断,并调用`USART1_IRQHandler`函数处理接收到的数据。在`USART1_IRQHandler`函数中,我们将接收到的数据保存到rx_buf数组中,并递增rx_idx变量。在主循环中,我们可以通过检查rx_idx的值来判断是否有数据接收到,然后进行处理。注意,在处理完数据后,我们需要将rx_idx清零,以便接收下一批数据。
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