初始化函数：
HAL_GPIO_Init(GPIOC, &GPIO_InitStruct);
读取输入电平函数：
HAL_GPIO_ReadPin(GPIOC, GPIO_PIN_3)；
设置输出电平函数：
HAL_GPIO_WritePin (GPIOA, GPIO_PIN_3, GPIO_PIN_SET)；
电平翻转函数：
HAL_GPIO_TogglePin (GPIOA, GPIO_PIN_2)；
延时200毫秒;
HAL_Delay(200);
中断处理函数：
void HAL_GPIO_EXTI_IRQHandler (uint16_t GPIO_Pin)；
中断回调函数：
void HAL_GPIO_EXTI_Callback (uint16_t GPIO_Pin)；?
void HAL_GPIO_EXTI_Callback(uint16_t GPIO_Pin){
??????? if(GPIO_Pin==Key_1_Pin){
??????????? HAL_GPIO_TogglePin(GPIOA,GPIO_PIN_1);
??? }
};
定时器更新中断回调函数
void HAL_TIM_PeriodElapsedCallback(TIM_HandleTypeDef *htim);
void HAL_TIM_PeriodElapsedCallback(TIM_HandleTypeDef *htim)
{
? if(htim->Instance == TIM6)
??????? HAL_GPIO_TogglePin(GPIOB, GPIO_PIN_5);
}
启动定时器（使用更新中断）。
HAL_TIM_Base_Start_IT (&htim6)
PWM接口函数
HAL_TIM_PWM_Start(&htim3, TIM_CHANNEL_2);
定时器比较/捕获寄存器CCR设置函数：
__HAL_TIM_SetCompare(&htim3,TIM_CHANNEL_2,PWM_value);
while (1)
? {
?????? if(PWM_value==0||PWM_value<10000)
?????????? PWM_value++;
?????? else if(PWM_value==10000)
?????????? PWM_value=0;
?????? __HAL_TIM_SetCompare(&htim3,TIM_CHANNEL_2,PWM_value);
}}
修改重装载寄存器ARR函数
??? HAL_TIM_SET_AUTORELOAD (&htime6, 500)
串口接收函数
HAL_UART_Receive(&huart1,RecBuf,8,100)；
发送函数
HAL_UART_Transmit(&huart1 ,RecBuf,8,100);
uint8_t RecBuf[8];
while (1)
? {
??????? if(HAL_UART_Receive(&huart1,RecBuf,8,100)==HAL_OK){
??????????? printf ("the response is:\r");
??????????? HAL_UART_Transmit(&huart1 ,RecBuf,8,100);
??????????? printf("\r");
??????? }
}
串口中断方式发送函数
HAL_UART_Transmit_IT(&huart1,(uint8_t *)RxBuffer,10);
串口中断方式接收函数
HAL_UART_Receive_IT(&huart1,(uint8_t *)RxBuffer,8);
串口发送中断回调函数：
void HAL_UART_RxCpltCallback(UART_HandleTypeDef *huart)
void HAL_UART_RxCpltCallback(UART_HandleTypeDef *huart){
??????? if(huart->Instance==USART1){
??????????? Rxflag=1;
??????????? HAL_UART_Receive_IT(&huart1,(uint8_t *)RxBuffer,10);
??????? }
}
while (1)
? {
??????? if(Rxflag==1){
??????????? Rxflag=0;
??????????? HAL_UART_Transmit_IT(&huart1,(uint8_t *)RxBuffer,10);
??????? }
? }
串口中断通用处理函数：
void HAL_UART_IRQHandler(UART_HandleTypeDef *huart)
重写printf
#include "stdio.h"
int fputc(int ch,FILE *f){
??? HAL_UART_Transmit (&huart1 ,(uint8_t*)&ch ,1,HAL_MAX_DELAY);
??? return ch ;
}
int fgetc(FILE *f){
??? uint8_t ch;
??? HAL_UART_Receive (&huart1 ,(uint8_t*)&ch ,1,HAL_MAX_DELAY);
??? return ch ;
}
printf("%d",a);输出十进制整数 ???printf("\r");回车
DMA
void USART1_IRQHandler(void)
{
? /* USER CODE BEGIN USART1_IRQn 0 */
? /* USER CODE END USART1_IRQn 0 */
? HAL_UART_IRQHandler(&huart1);
? /* USER CODE BEGIN USART1_IRQn 1 */
if(__HAL_UART_GET_FLAG (&huart1,UART_FLAG_IDLE)!=RESET )
{
??? __HAL_UART_CLEAR_IDLEFLAG (&huart1);
??? HAL_UART_IdleCpltCallback(&huart1 );
}
? /* USER CODE END USART1_IRQn 1 */
}
#define LENGTH 100
uint8_t? RxBuffer[LENGTH];
uint8_t RecCount = 0;
uint8_t RxFlag = 0;
__HAL_UART_ENABLE_IT (&huart1,UART_IT_IDLE);
HAL_UART_Receive_DMA (&huart1 ,(uint8_t*)RxBuffer ,LENGTH );
while (1)
? {
??? /* USER CODE END WHILE */
??? /* USER CODE BEGIN 3 */
??????? if(RxFlag ==1)
??????? {
??????? RxFlag =0;
??????? RecCount = LENGTH-__HAL_DMA_GET_COUNTER (&hdma_usart1_rx);
??????? HAL_UART_Transmit_DMA (&huart1,(uint8_t*)RxBuffer,RecCount );
??????? RecCount = 0;
??????? __HAL_DMA_DISABLE (&hdma_usart1_rx );
??????? HAL_UART_Receive_DMA (&huart1 ,(uint8_t*)RxBuffer ,LENGTH );
??????? }
? }
void HAL_UART_RxCpltCallback(UART_HandleTypeDef? *huart)
{
??? if(huart->Instance==USART2 )
??? {HAL_UART_Receive_DMA (&huart1 ,(uint8_t*)RxBuffer ,LENGTH );
??????? }
}
void HAL_UART_IdleCpltCallback(UART_HandleTypeDef? *huart)
{
RxFlag =1;
??? HAL_UART_DMAStop(&huart1);
}
?
