rt-thread studio配置复用发送脚和接收脚

发布于 2021-12-29 20:59:32 浏览：1312 订阅该版

在 rt-thread studio中新建工程
可以控制台串口,发送角和接收脚
![image.png](https://oss-club.rt-thread.org/uploads/20211229/4455351c0ecfa138223f69c0125b71f4.png)

但是我的发送和接收需要进行引脚复用,之前测试可用的的keil 工程代码如下
使用的是PA0到UART4和PA6到USART2 这种设置在Studio中如何配置
```
void Uart_A72_PortInit(void) {

//初始化串口需要配置使用的 IO 端口、微控制器内部串口的设置、串口接收的中断优先级分配
  GPIO_InitTypeDef GPIO_InitStructure;
  USART_InitTypeDef USART_InitStructure;
  NVIC_InitTypeDef NVIC_TypeDefStructure;

//开启外设时钟 GPIOA,GPIOD,GPIOI
  RCC_AHB1PeriphClockCmd(RCC_AHB1Periph_GPIOA | RCC_AHB1Periph_GPIOD | RCC_AHB1Periph_GPIOI, ENABLE);

//开启外设时钟 USART2或者UART4
  RCC_APB1PeriphClockCmd(RCC_APB1Periph_USART2 | RCC_APB1Periph_UART4, ENABLE);

//配置发送脚脚和接收脚
  GPIO_PinAFConfig(GPIOA, GPIO_PinSource0, GPIO_AF_UART4);
  GPIO_PinAFConfig(GPIOD, GPIO_PinSource6, GPIO_AF_USART2);

GPIO_InitStructure.GPIO_OType = GPIO_OType_PP;
  GPIO_InitStructure.GPIO_PuPd = GPIO_PuPd_UP;
  GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF;

GPIO_InitStructure.GPIO_Pin = GPIO_Pin_0;
  GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
  GPIO_Init(GPIOA, &GPIO_InitStructure);

GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF;
  GPIO_InitStructure.GPIO_Pin = GPIO_Pin_6;
  GPIO_Init(GPIOD, &GPIO_InitStructure);

GPIO_InitStructure.GPIO_OType = GPIO_OType_PP;
  GPIO_InitStructure.GPIO_PuPd = GPIO_PuPd_UP;
  GPIO_InitStructure.GPIO_Mode = GPIO_Mode_OUT;

GPIO_InitStructure.GPIO_Pin = GPIO_Pin_8;
  GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
  GPIO_Init(GPIOI, &GPIO_InitStructure);

Hard_Uart_MurtSel(0);                   //选择与A72相连的端口

//__________________________________________________________________________

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_Tx;
  USART_Init(UART4, &USART_InitStructure);
  USART_Cmd(UART4, ENABLE);

NVIC_TypeDefStructure.NVIC_IRQChannel = UART4_IRQn;
  NVIC_TypeDefStructure.NVIC_IRQChannelPreemptionPriority = 0;
  NVIC_TypeDefStructure.NVIC_IRQChannelSubPriority = 2;
  NVIC_TypeDefStructure.NVIC_IRQChannelCmd = ENABLE;
  NVIC_Init(&NVIC_TypeDefStructure);

USART_InitStructure.USART_BaudRate = 115200;
  USART_InitStructure.USART_Mode = USART_Mode_Rx;
  USART_Init(USART2, &USART_InitStructure);

NVIC_TypeDefStructure.NVIC_IRQChannel = USART2_IRQn;
  NVIC_TypeDefStructure.NVIC_IRQChannelPreemptionPriority = 0;
  NVIC_TypeDefStructure.NVIC_IRQChannelSubPriority = 0;
  NVIC_TypeDefStructure.NVIC_IRQChannelCmd = ENABLE;
  NVIC_Init(&NVIC_TypeDefStructure);

USART_ITConfig(USART2, USART_IT_RXNE, ENABLE);
  USART_Cmd(USART2, ENABLE);

}
```