如何基于AT32F421写一个串口接收发送8个字节数据的代码
时间: 2024-02-25 16:51:32 浏览: 24
下面是一个基于AT32F421的串口接收发送8个字节数据的代码示例:
```c
#include <stdio.h>
#include "at32f4xx.h"
#define UART_TX_PIN GPIO_Pin_9
#define UART_RX_PIN GPIO_Pin_10
#define UART_GPIO_PORT GPIOA
#define UART_GPIO_CLK RCC_APB2Periph_GPIOA
#define UART_CLK RCC_APB1Periph_USART2
#define UART USART2
void init_uart()
{
USART_InitTypeDef USART_InitStructure;
GPIO_InitTypeDef GPIO_InitStructure;
// Enable GPIO clock
RCC_APB2PeriphClockCmd(UART_GPIO_CLK, ENABLE);
// Enable UART clock
RCC_APB1PeriphClockCmd(UART_CLK, ENABLE);
// Configure UART pins
GPIO_InitStructure.GPIO_Pin = UART_TX_PIN | UART_RX_PIN;
GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_PP;
GPIO_Init(UART_GPIO_PORT, &GPIO_InitStructure);
// Configure UART
USART_InitStructure.USART_BaudRate = 9600;
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(UART, &USART_InitStructure);
// Enable UART
USART_Cmd(UART, ENABLE);
}
void uart_send(uint8_t *buf, uint8_t len)
{
uint8_t i;
for (i = 0; i < len; i++) {
USART_SendData(UART, buf[i]);
while (USART_GetFlagStatus(UART, USART_FLAG_TXE) == RESET);
}
}
void uart_receive(uint8_t *buf, uint8_t len)
{
uint8_t i;
for (i = 0; i < len; i++) {
while (USART_GetFlagStatus(UART, USART_FLAG_RXNE) == RESET);
buf[i] = USART_ReceiveData(UART);
}
}
int main(void)
{
uint8_t tx_buf[8] = {0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07, 0x08};
uint8_t rx_buf[8];
// Initialize UART
init_uart();
// Send data
uart_send(tx_buf, 8);
// Receive data
uart_receive(rx_buf, 8);
// Do something with received data
while (1);
}
```
在这个示例中,我们使用USART2作为串口,并使用PA9和PA10作为UART的TX和RX引脚。我们首先需要初始化UART,然后可以使用uart_send()函数发送8个字节的数据,并使用uart_receive()函数接收8个字节的数据。在上面的示例中,我们只是打印收到的数据。
相关推荐
![pdf](https://img-home.csdnimg.cn/images/20210720083512.png)
![zip](https://img-home.csdnimg.cn/images/20210720083736.png)
![](https://csdnimg.cn/download_wenku/file_type_ask_c1.png)
![](https://csdnimg.cn/download_wenku/file_type_ask_c1.png)
![](https://csdnimg.cn/download_wenku/file_type_ask_c1.png)
![](https://csdnimg.cn/download_wenku/file_type_ask_c1.png)
![](https://csdnimg.cn/download_wenku/file_type_ask_c1.png)
![](https://csdnimg.cn/download_wenku/file_type_ask_c1.png)
![](https://csdnimg.cn/download_wenku/file_type_ask_c1.png)
![](https://csdnimg.cn/download_wenku/file_type_ask_c1.png)
![](https://csdnimg.cn/download_wenku/file_type_ask_c1.png)
![](https://csdnimg.cn/download_wenku/file_type_ask_c1.png)
![](https://csdnimg.cn/download_wenku/file_type_ask_c1.png)
![](https://csdnimg.cn/download_wenku/file_type_ask_c1.png)
![](https://csdnimg.cn/download_wenku/file_type_ask_c1.png)
![](https://csdnimg.cn/download_wenku/file_type_ask_c1.png)
![](https://csdnimg.cn/download_wenku/file_type_ask_c1.png)