51的串口简单发送接收

fan280 · 发表于 2022-8-31 14:24

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#include "reg52.h"

sbit WEI = P2^7;
sbit DUA = P2^6;

#define uint unsigned int
#define uchar unsigned char

void UART_Init(void);
void SMG_Init(uchar i);

uchar code DuanMa[] = {0x3F, 0x06, 0x5B, 0x4F, 0x66, 0x6D, 0x7D, 0x07, 0x7F, 0x6F,};
uchar code WeiMa[] = {0xef,0xdf,0xbf};
uchar ff;

void main(void)
{
UART_Init();

while(1)
{
      ;
}
}

void UART_Init(void)
{
EA = 1;
ES = 1;
TMOD = TMOD & 0xff;
TMOD = TMOD | 0x20;
SM0 = 0;
SM1 = 1;
REN = 1;
TH1 = 0xfd;
TL1 = 0xfd;
TR1 = 1;
}

void SMG_Init(uchar i)
{
static uchar Num;

Num = i;

WEI = 1;
P0 = WeiMa;
WEI = 0;

switch(i)
{
      case 0: DUA = 1; P0 = DuanMa[Num / 100]; DUA = 0; break;
      case 1: DUA = 1; P0 = DuanMa[Num / 100 % 10]; DUA = 0; break;
      case 2: DUA = 1; P0 = DuanMa[Num % 10]; DUA = 0; break;
}
}

void InitterruptUART(void)       interrupt 4
{
uchar cnt;
uchar temp;

TH1 = 0xfd;
TL1 = 0xfd;
cnt++;
SMG_Init(ff);

if(RI == 1)
{
      RI = 0;

      ff = SBUF;
      temp = ff;
      SBUF = temp++;

      if(TI == 1)
      {
         TI = 0;
      }
}
}