帮我用STM32F411CEU6标准库版本写一下串口接收的代码
时间: 2024-04-12 19:29:30 浏览: 9
当然可以帮你写串口接收的代码。以下是使用STM32F411CEU6标准库版本的示例代码:
```c
#include "stm32f4xx.h"
#include <stdio.h>
void USART2_Init(void) {
RCC->AHB1ENR |= RCC_AHB1ENR_GPIOAEN; // Enable GPIOA clock
RCC->APB1ENR |= RCC_APB1ENR_USART2EN; // Enable USART2 clock
// Configure PA2 (USART2_TX) as alternate function
GPIOA->MODER &= ~GPIO_MODER_MODER2;
GPIOA->MODER |= GPIO_MODER_MODER2_1;
GPIOA->AFR[0] &= ~GPIO_AFRL_AFRL2;
GPIOA->AFR[0] |= GPIO_AFRL_AFRL2_7;
// Configure PA3 (USART2_RX) as alternate function
GPIOA->MODER &= ~GPIO_MODER_MODER3;
GPIOA->MODER |= GPIO_MODER_MODER3_1;
GPIOA->AFR[0] &= ~GPIO_AFRL_AFRL3;
GPIOA->AFR[0] |= GPIO_AFRL_AFRL3_7;
// Configure USART2
USART2->CR1 &= ~USART_CR1_UE; // Disable USART2
USART2->CR1 &= ~USART_CR1_M; // 8 data bits
USART2->CR1 &= ~USART_CR1_PCE; // No parity
USART2->BRR = 0x0683; // 9600 baud @ 16MHz
USART2->CR1 |= USART_CR1_TE | USART_CR1_RE; // Enable transmitter and receiver
USART2->CR1 |= USART_CR1_UE; // Enable USART2
}
char USART2_ReadChar(void) {
while (!(USART2->SR & USART_SR_RXNE)); // Wait until data available
return USART2->DR;
}
int main(void) {
USART2_Init();
char receivedChar;
while (1) {
receivedChar = USART2_ReadChar();
printf("Received character: %c\r\n", receivedChar);
}
}
```
这段代码初始化了USART2,并在主循环中接收串口数据,并使用printf函数打印接收到的字符。你可以根据需要进行修改和扩展。
请注意,以上代码仅为示例,你需要根据具体的硬件连接和需求进行相应的配置和适配。另外,你可能需要在项目设置中启用Semihosting功能以支持printf输出。