STM32F103ZE单片机用标准库串口中断怎么接收两个字符,并使用
时间: 2024-02-27 19:51:20 浏览: 60
你可以使用如下代码实现在STM32F103ZE单片机上使用标准库串口中断接收两个字符:
```c
#include "stm32f10x.h"
#include <stdio.h>
void USART1_IRQHandler(void)
{
if (USART_GetITStatus(USART1, USART_IT_RXNE) != RESET)
{
static char buffer[2];
static uint8_t counter = 0;
buffer[counter] = USART_ReceiveData(USART1);
counter++;
if (counter >= 2)
{
counter = 0;
printf("Received characters: %c%c\n", buffer[0], buffer[1]);
}
}
}
int main(void)
{
// 初始化串口1
GPIO_InitTypeDef GPIO_InitStructure;
USART_InitTypeDef USART_InitStructure;
NVIC_InitTypeDef NVIC_InitStructure;
RCC_APB2PeriphClockCmd(RCC_APB2Periph_USART1 | RCC_APB2Periph_GPIOA, ENABLE);
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_9;
GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_PP;
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);
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);
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);
USART_ITConfig(USART1, USART_IT_RXNE, ENABLE);
USART_Cmd(USART1, ENABLE);
while (1)
{
// 主循环
}
}
```
在这个例子中,我们使用了USART1的串口,并且使用了标准库函数来初始化串口和中断。在中断处理函数中,我们使用了一个静态的字符数组和计数器来接收两个字符,当接收到两个字符后,我们就可以进行相应的处理了。
注意:在使用标准库串口中断时,需要确保在中断处理函数中使用的所有函数都是可重入的,否则可能会导致不可预期的错误。
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