UART串口通信

#include "sys.h"
#include "delay.h"
#include "usart.h"

 u8 rdata[];

 UART_HandleTypeDef usart1_handler; //UART¾ä±ú

 void uart1_init()
{
    usart1_handler.Instance=USART1;                        //USART1
    usart1_handler.Init.BaudRate=;                    //²¨ÌØÂÊ
    usart1_handler.Init.WordLength=UART_WORDLENGTH_8B;   //×Ö³¤Îª8λÊý¾Ý¸ñʽ
    usart1_handler.Init.StopBits=UART_STOPBITS_1;        //Ò»¸öֹͣλ
    usart1_handler.Init.Parity=UART_PARITY_NONE;            //ÎÞÆæżУÑéλ
    usart1_handler.Init.HwFlowCtl=UART_HWCONTROL_NONE;   //ÎÞÓ²¼þÁ÷¿Ø
    usart1_handler.Init.Mode=UART_MODE_TX_RX;            //ÊÕ·¢Ä£Ê½
    HAL_UART_Init(&usart1_handler);                        //HAL_UART_Init()»áʹÄÜUART1

}

void HAL_UART_MspInit(UART_HandleTypeDef *huart)
{

    GPIO_InitTypeDef GPIO_Initure;

    if(huart->Instance==USART1)//Èç¹ûÊÇ´®¿Ú1£¬½øÐд®¿Ú1 MSP³õʼ»¯
    {
        __HAL_RCC_GPIOA_CLK_ENABLE();            //ʹÄÜGPIOAʱÖÓ
        __HAL_RCC_USART1_CLK_ENABLE();            //ʹÄÜUSART1ʱÖÓ

        GPIO_Initure.Pin=GPIO_PIN_9;            //PA9
        GPIO_Initure.Mode=GPIO_MODE_AF_PP;        //¸´ÓÃÍÆÍìÊä³ö
        GPIO_Initure.Pull=GPIO_PULLUP;            //ÉÏÀ­
        GPIO_Initure.Speed=GPIO_SPEED_FREQ_HIGH;        //¸ßËÙ
        GPIO_Initure.Alternate=GPIO_AF7_USART1;    //¸´ÓÃΪUSART1
        HAL_GPIO_Init(GPIOA,&GPIO_Initure);           //³õʼ»¯PA9

        GPIO_Initure.Pin=GPIO_PIN_10;            //PA10
        HAL_GPIO_Init(GPIOA,&GPIO_Initure);           //³õʼ»¯PA10

        HAL_NVIC_EnableIRQ(USART1_IRQn);        //ʹÄÜUSART1ÖжÏͨµÀ
        HAL_NVIC_SetPriority(USART1_IRQn,,);    //ÇÀÕ¼ÓÅÏȼ¶3£¬×ÓÓÅÏȼ¶3
    }

}

void USART1_IRQHandler(void)
{
    HAL_UART_IRQHandler(&usart1_handler);
    while (HAL_UART_GetState(&usart1_handler) != HAL_UART_STATE_READY);//ÅжÏUARTÊÇ·ñ³õʼ»¯
    while(HAL_UART_Receive_IT(&usart1_handler, (u8 *)rdata, ) != HAL_OK);    //ÖØдò¿ªÖжÏ

}

void HAL_UART_RxCpltCallback(UART_HandleTypeDef *huart)
{
  u8 rec;
  if(huart->Instance==USART1)//Èç¹ûÊÇ´®¿Ú1
  {
    rec=*(--(huart->pRxBuffPtr));//°ÑÖ¸Õëµ¹ÍË»ØÔ­À´µÄ×Ö·ûλÖÃ
    HAL_UART_Transmit(&usart1_handler,&rec,,);
  }

}

int main(void)
{

    HAL_Init();                     //³õʼ»¯HAL¿â
    Stm32_Clock_Init(,,,);   //ÉèÖÃʱÖÓ,180Mhz
    delay_init();

    uart1_init();//³õʼ»¯´®¿Ú²ÎÊý

    HAL_UART_Receive_IT(&usart1_handler, (u8 *)rdata, );//¸Ãº¯Êý»á¿ªÆô½ÓÊÕÖжϣº±ê־λUART_IT_RXNE£¬²¢ÇÒÉèÖýÓÊÕ»º³åÒÔ¼°½ÓÊÕ»º³å½ÓÊÕ×î´óÊý¾ÝÁ¿

    while()
    {

    }

    }