STM32F103USART1和USART2能不能同时使用同时使用时要注意哪些

康宁 · 发表于 2019-4-20 12:06:13

/*LCD_INIT()函数使用了printf函数，所以想使用串口1点亮屏幕，然后想用串口2收发数据。
未加串口2时屏幕可以正常显示，加了串口2程序之后屏幕无法显示了*/

#include "led.h"
#include "delay.h"
#include "key.h"
#include "sys.h"
#include "lcd.h"
#include "ser.h"
#include "usart.h"
/*LCD_init()oˉêyμ÷óÃáËprintf￡¬ËùòÔ′®¿ú1±ØDëê1óÃ
*/
u8  usa3_buf[6]={0,0,0,0,0,0};
u8 a,TEMP,start_flag;

void USART_Hand(void);

int main(void)
{
delay_init();            //Ñóê±oˉêy3õê¼»ˉ
NVIC_PriorityGroupConfig(NVIC_PriorityGroup_2);    //éèÖÃNVICÖD¶Ï·Ö×é2:2Î»ÇàÕ¼óÅÏè¼¶￡¬2Î»Ïìó|óÅÏè¼¶
usart2_init(9600);
   uart_init(115200);      //′®¿ú3õê¼»ˉ
//
LED_Init();       //LED¶Ë¿ú3õê¼»ˉ
LCD_Init();
   LCD_Clear(WHITE);
POINT_COLOR=RED;
   LCD_ShowString(30,40,210,24,16,"TEMP: ");
    while(1)
{
USART_Hand();

   if(start_flag==1)
   {
   USART_Cmd(USART1,DISABLE);
   start_flag=0;
//    TEMP= usa3_buf[2]+usa3_buf[3]+usa3_buf[4];
// if((usa3_buf[0] == 0xaa) && (usa3_buf[1] == 0x55))
// {
   LED0=0;
// if(usa3_buf[5]==0x06)
// {
LCD_ShowxNum(70,40,usa3_buf[2],3,16,0);
LCD_ShowxNum(70,56,usa3_buf[0],3,16,0);
   LCD_ShowxNum(70,72,usa3_buf[1],3,16,0);
   LCD_ShowxNum(70,88,usa3_buf[3],3,16,0);
   LCD_ShowxNum(70,104,usa3_buf[4],3,16,0);
   LCD_ShowxNum(70,120,55,3,16,0);
//       }
//    }
   USART_Cmd(USART1,ENABLE);
   }
}
}

void USART_Hand(void)
{
   u32 i;

if(USART_GetITStatus(USART1,USART_IT_RXNE) != RESET)
{
      usa3_buf[0] = USART_ReceiveData(USART1);
               i = 1;
   while(1)
         {

               if(USART_GetITStatus(USART1,USART_IT_RXNE) != RESET)
               {

                     usa3_buf[i] = USART_ReceiveData(USART1);
                              i++;
                           if(i > 5)
                              { LED1=0;
                                 i = 0;
                  start_flag=1;
                        break;
                     }
   }
   }
}
}