小試成功

ID:93787 · 發(fā)表于 2015-10-27 20:59

#include <reg52.h>
#define uchar  unsigned char
#define uint unsigned int

const uchar LEDcode[]={0xfe,0xfd,0xfb,0xf7,0xef,0xdf,0xbf,0x7f};

void delay_ms(uint t)
{
  uint m,n;
  for (m=0;m<t;m++)
for (n=0;n<110;n++);

}
void MasterUART_init(void)
{
SCON = 0x50;
TMOD = 0x20;
TH1  = 0xFD;
TL1  = 0xFD;
TR1  = 1;
ES = 1;
EA = 1;
}

void MasterSendByte(uchar udat)
{
SBUF = udat;
while(!TI);
   TI = 0;
}

main()
{ uint i;
MasterUART_init();
while(1)
{
   for(i=0;i<8; i++)
   {
      MasterSendByte(LEDcode[i]);
      P1=LEDcode[i];
      delay_ms(100);
   }
}
}

從機

#include <reg52.h>
#define uchar  unsigned char
#define uint unsigned int

void delay_ms(uint t)
{
  uint m,n;
  for (m=0;m<t;m++)
for (n=0;n<100;n++);

}
void SlaveUART_init(void)
{
SCON = 0x50;
TMOD = 0x20;
TH1  = 0xFD;
TL1  = 0xFD;
TR1  = 1;
ES = 1;
EA = 1;
}

main()
{
SlaveUART_init();
while(1);
}

void interrupt_uart() interrupt 4
{
uchar temp;

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

      temp = SBUF;
   RI = 0;
      P1=temp;
      REN  = 1;
}
}

這是正確的，，，，。。。。。