stm32 gpio
点灯
/* USER CODE BEGIN WHILE */
while (1)
{
HAL_GPIO_WritePin(GPIOC,LED0_Pin,GPIO_PIN_RESET);//点亮 LED0是在引脚定义的时候UserLabel的内容 _Pin需要加上
HAL_Delay(5000);
HAL_GPIO_WritePin(GPIOC,LED0_Pin,GPIO_PIN_SET);//熄灭
HAL_Delay(2000);
/* USER CODE END WHILE */
/* USER CODE BEGIN 3 */
}
serial
开启串口1 （异步）及其接收中断
/* USER CODE BEGIN 2 */
// 添加定义
#define LENGTH 1 //接收字符数目
uint8_t RxBuffer[LENGTH];//接收数据
uint8_t RxFlag = 0; //0表示没有收到`#`收到`*`,1表示收到了`#`
HAL_UART_Receive_IT(&huart1, (uint8_t*)RxBuffer, LENGTH); //使能接收中断
/* USER CODE END 2 */
/* Infinite loop */
/* USER CODE BEGIN WHILE */
while (1)
{
if(RxFlag==0){
HAL_UART_Transmit(&huart1, (uint8_t *)"hello windows!\r\n", 16, 0xffff);
HAL_Delay(1000);
}
/* USER CODE END WHILE */
/* USER CODE BEGIN 3 */
}
//接收回调函数
void HAL_UART_RxCpltCallback(UART_HandleTypeDef *huart){
if(huart->Instance == USART1 && *RxBuffer == '#'){
RxFlag = 1;
}else if (huart->Instance == USART1 && *RxBuffer == '*'){
RxFlag = 0;
}
HAL_UART_Receive_IT(&huart1, (uint8_t*)RxBuffer, LENGTH); //因为它有效性只有一次，所以在接收完成后需要重新使能
}
/* USER CODE END 3 */
}