stm32 串口中断接受发送字符串源码

只看该作者 · 2016-7-7 10:42

#include "sys.h"
#include "delay.h"
#include "usart.h"
#include "lcd.h"
#include "key.h"
u8 USART1_TX_DAT_MENU1_CMD_BUF1[6]={0x01,0x02,0x03,0x04};
u8 flag=1;
int main(void)
{
      u8 i=0;
      u8 key_vable=0;
      delay_init();                   //延时函数初始化
      NVIC_Configuration();       //设置NVIC中断分组2:2位抢占优先级，2位响应优先级
      uart_init(115200);                //串口初始化为115200
      lcd_init();
      KEY_init();
      clr_lcd();
      while(1)
      {
         key_vable= KEY_Scan();             //键盘扫描
         if(key_vable==KEY5_SURE)                //如果key5按下就发送命令
         {
                  send_cmd_to_mainboard(USART1_TX_DAT_MENU1_CMD_BUF1);
               key_vable=0;
         }
         if((reecive_over_flag==1))
         {
                  clr_lcd();                                  //清屏
               delay_ms(10);
                  copy_data_to_LCD_dis();       //将接受buf中的数据copy到显示buf中
                  data_dis2();                               //lcd的显示函数
               reecive_over_flag=0;             //清零接受完成标志
               for(i=0;i<4;i++)                         //清零接受数据buf
               {
                  usart1_r_dat_buf[i]=0;
                     receive_dat[i]=0;                //清零显示buf
               }
         }
      }
}

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

u8 usart1_r_dat_buf[4]={0};
u8 reecive_over_flag=0;

void uart_init(u32 bound){
//GPIO端口设置
GPIO_InitTypeDef GPIO_InitStructure;
      USART_InitTypeDef USART_InitStructure;
      NVIC_InitTypeDef NVIC_InitStructure;

      RCC_APB2PeriphClockCmd(RCC_APB2Periph_USART1|RCC_APB2Periph_GPIOA, ENABLE);       //使能USART1，GPIOA时钟
   //USART1_TX PA.9
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_9; //PA.9
GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_PP;       //复用推挽输出
GPIO_Init(GPIOA, &GPIO_InitStructure);

//USART1_RX       PA.10
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_10;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IN_FLOATING;//浮空输入
GPIO_Init(GPIOA, &GPIO_InitStructure);

//Usart1 NVIC 配置

NVIC_InitStructure.NVIC_IRQChannel = USART1_IRQn;
      NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority=3 ;//抢占优先级3
      NVIC_InitStructure.NVIC_IRQChannelSubPriority = 3;             //子优先级3
      NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;                      //IRQ通道使能
      NVIC_Init(&NVIC_InitStructure);       //根据指定的参数初始化VIC寄存器

      //USART 初始化设置

      USART_InitStructure.USART_BaudRate = bound;//一般设置为9600;
      USART_InitStructure.USART_WordLength = USART_WordLength_8b;//字长为8位数据格式
      USART_InitStructure.USART_StopBits = USART_StopBits_1;//一个停止位
      USART_InitStructure.USART_Parity = USART_Parity_No;//无奇偶校验位
      USART_InitStructure.USART_HardwareFlowControl = USART_HardwareFlowControl_None;//无硬件数据流控制
      USART_InitStructure.USART_Mode = USART_Mode_Rx | USART_Mode_Tx;//收发模式

USART_Init(USART1, &USART_InitStructure); //初始化串口
USART_ITConfig(USART1, USART_IT_RXNE, ENABLE);//开启中断
USART_Cmd(USART1, ENABLE);                   //使能串口

}

void USART1_IRQHandler(void)                                                 //串口1中断服务程序
{
      static unsigned char i=0,j=0;
      if(USART_GetITStatus(USART1, USART_IT_RXNE)==SET)          //接收中断
      {
               USART_ClearITPendingBit(USART1,USART_IT_RXNE);
               if(i>3)
               {
                        i=0;
               }
            usart1_r_dat_buf[i] =USART1->DR;
            i++;
            reecive_over_flag=1;
      }
if(USART_GetFlagStatus(USART1,USART_FLAG_ORE) == SET)                //溢出
   {
      USART_ClearFlag(USART1,USART_FLAG_ORE);                                  //读 SR
      USART_ReceiveData(USART1);                                                                         //读 DR
   }
}
void send_cmd_to_mainboard(u8 *send_cmd_buf)
{
      unsigned char t=0;
         USART_ClearFlag(USART1,USART_FLAG_TC);
      for(t=0;t<4;t++)
      {
            USART_SendData(USART1, send_cmd_buf[t]);                   //向串口2发送数据
            while(USART_GetFlagStatus(USART1,USART_FLAG_TC)!=SET);//等待发送结束
      }
}

stm32 串口中断接受 发送字符串 源码

stm32 串口中断接受发送字符串源码