STM32 CubeMX

1_GPIO

HAL_GPIO_WritePin(GPIOx,GPIO_PIN_x,GPIO_PIN_SET);  //或者GPIO_PIN_RESET

2_PWM

uint16_t val = 0;
HAL_TIM_PWM_Start(&htimx,TIM_CHANNEL_1);
While(){
_HAL_TIM_SET_COMPARE(&htimx,TIM_CHANNEL_1,val);
_val++;
}

3_UART_发送10字符串，仅执行1次（不在while中）

//定义两个数组变量
Uint8_t T[]=”\nPlease enter 10 characters:\r\n”;
Uint8_t R[20];

//串口中断发送/接收aTxStartMessage数组，并存于R中
HAL_UART_Transmit_IT(&huart1,(uint8_t*)T,Sizeof(T));
HAL_UART_Receive_IT(&huart1,(uint8_t*)R,10);

//函数将接收到的数据用串口发送回去
void HAL_UART_RxCpltCallback(UART_HandleTypeDef *huart)
{
UNUSED(huart);
    HAL_UART_Transmit(&huart1,(uint8_t*)R,10,0xFFFF);
}

1 串口发送/接收函数
串口轮询模式发送/接收，使用超时管理机制

HAL_UART_Transmit();
HAL_UART_Receive ();

串口中断模式发送/接收

HAL_UART_Transmit_IT();
HAL_UART_Receive_IT();
例：
    main.c:
    uint8_t aRxBuffer[RXBUFFERSIZE];
    __HAL_UART_ENABLE_IT(&huart7,UART_IT_RXNE);