stm32f103c8t6串口中断收发
时间: 2023-10-19 11:09:32 浏览: 48
好的,关于 stm32f103c8t6 的串口中断收发,你可以按照以下步骤进行配置:
1. 首先,需要开启 USART 时钟,可以使用 RCC_APB2PeriphClockCmd 函数实现,例如:
```
RCC_APB2PeriphClockCmd(RCC_APB2Periph_USART1, ENABLE);
```
2. 然后,需要配置 USART 的 GPIO 引脚,将其设置为复用推挽输出模式,例如:
```
GPIO_InitTypeDef GPIO_InitStructure;
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_9 | GPIO_Pin_10;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_PP;
GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
GPIO_Init(GPIOA, &GPIO_InitStructure);
```
3. 接着,需要配置 USART 的工作模式、波特率等参数,可以使用 USART_Init 函数实现,例如:
```
USART_InitTypeDef USART_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);
```
4. 最后,需要开启 USART 的中断,并在中断服务函数中处理接收和发送数据,例如:
```
NVIC_InitTypeDef NVIC_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);
void USART1_IRQHandler(void)
{
if (USART_GetITStatus(USART1, USART_IT_RXNE) != RESET)
{
// 处理接收数据
USART_ClearITPendingBit(USART1, USART_IT_RXNE);
}
if (USART_GetITStatus(USART1, USART_IT_TXE) != RESET)
{
// 处理发送数据
USART_ClearITPendingBit(USART1, USART_IT_TXE);
}
}
```