c8051f330串口通讯

只看该作者 · 2020-4-22 13:56

枕头aa 55 结束55 aa 数据。返回来枕头结束中间数据的和

不知道问题出在那。就是反不回来数据

#include <c8051f330.h>                // SFR declarations
#include &quot;string.h&quot;
#include <stdio.h>
#include &quot;intrins.h&quot;

unsigned char RX_dat[20];
unsigned char RX_data[20];
unsigned char RXflage;
unsigned long  Rx_Freq;
double temp;
unsigned long temp_ulong;
unsigned long cfgdat;

unsigned char UART_RX_idx = 0;

void delay(unsigned long delaytime)
{
      for(;delaytime>0;delaytime--)
            _nop_();
}

void delay10000(unsigned long delaytime)
{
      unsigned long i;
      for(;delaytime>0;delaytime--)
            for(i = 0;i <10000;i++)
                     _nop_();
}

void UART_Init()
{
            EA = 0;
            SCON0    = 0x50;
            TCON    = 0x40;
            TMOD    = 0x20;
            TH1    = 0x96;
            CKCON    = 0x00;

            TR1 = 1;
            ET0= 1;
            ES0 =1;
            TI0 = 0;
            RI0 = 0;
            EA = 1;
            UART_RX_idx = 0;
            RXflage = 0;
}

void Send_data(unsigned char dat)
{
            SBUF0 = dat;
            TI0 = 1;
            delay(10);
            while(!TI0);
}

void uart() interrupt 4
{
      if(RI0)
      {
            EA = 0;
                     RI0 = 0;
                     RX_dat[UART_RX_idx] = SBUF0;
                     Send_data(SBUF0);
                     UART_RX_idx++;
                     if((UART_RX_idx ==2))
            {
   if((RX_dat[0]==0XAA)&&(RX_dat[1]==0x55))
                     {

                     }
                     else { UART_RX_idx=0;}
            }
            if((UART_RX_idx>=6))
            {
                     if((RX_dat[5]==0XAA)&&(RX_dat[4]==0x55))
                     {
                              UART_RX_idx |=0x8000;
                     }
                     else
                     {
                              UART_RX_idx=0;
                     }
            }
            EA = 1;
      }
}

void main (void)
{

  unsigned char time=0;
  unsigned char len;
      unsigned char t;
      unsigned int aa = 0;
      PCA0MD &= ~0x40;
      OSCICN |= 0x03;
      XBR0 = 0x01;
      XBR1 = 0x40;
      P0MDIN |= 0x00;
      P1MDIN |= 0x00;
      P0MDOUT|= 0xff;
      P1MDOUT|= 0xff;
      UART_Init();
      delay10000(20);
      while(1)
      {
            delay(100);
if(       UART_RX_idx&0x8000 )
            {
                              RX_data[0]=0xaa;
                              RX_data[1]=0x55;
                              RX_data[2]=RX_dat[2]+RX_dat[3];
                              RX_data[3]=0x55;
                              RX_data[4]=0xaa;

                              len=UART_RX_idx&0x3fff;
                  for(t=0;t<(len-1);t++)
                     {
                                    SBUF0=RX_data[UART_RX_idx];
                     // Send_data((RX_data[UART_RX_idx]));//向串口1发送数据
                                    while(!TI0)
                                    TI0 = 0;
                     }
                                    RX_data[UART_RX_idx]=0;
            }
      }
}

只看该作者 · 2020-4-22 21:13

有不少乱码

c8051f330串口通讯

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