乙機(jī)程序：

/*************** writer:shopping.w ******************/
#include
#define uint unsigned int
#define uchar unsigned char
sbit LED1 = P0^0;
sbit LED2 = P0^3;

void Delay(uint x)
{
uchar i;
while(x--)
{
for(i=0;i<120;i++);
}
}

void main()
{
SCON = 0x50;
TMOD = 0x20;
TH1 = 0xfd;
TL1 = 0xfd;
PCON = 0x00;
RI = 0;
TR1 = 1;
LED1 = LED2 =1;
while(1)
{
if(RI)
{
RI = 0;
switch(SBUF)
{
case A: LED1=~LED1;LED2=1;break;
case B: LED2=~LED2;LED1=1;break;
case C: LED1=~LED1;LED2=LED1;
}
}
else
LED1=LED2=1;
Delay(100);
}
}

甲機(jī)程序：

/*************** writer:shopping.w ******************/
#include
#define uint unsigned int
#define uchar unsigned char
sbit LED1 = P0^0;
sbit LED2 = P0^3;
sbit K1 = P1^0;

void Delay(uint x)
{
uchar i;
while(x--)
{
for(i=0;i<120;i++);
}
}

void putc_to_SerialPort(uchar c)
{
SBUF = c;
while(TI == 0);
TI = 0;
}

void main()
{
uchar Operation_NO = 0;
SCON = 0x40;
TMOD = 0x20;
PCON = 0x00;
TH1 = 0xfd;
TL1 = 0xfd;
TI = 0;
TR1 = 1;
while(1)
{
if(K1 == 0)
{
while(K1==0);
Operation_NO=(Operation_NO+1)%4;
}
switch(Operation_NO)
{
case 0:
LED1=LED2=1; break;
case 1:
putc_to_SerialPort(A);
LED1=~LED1;LED2=1;break;
case 2:
putc_to_SerialPort(B);
LED2=~LED2;LED1=1;break;
case 3:
putc_to_SerialPort(C);
LED1=~LED1;LED2=LED1;break;
}
Delay(10);
}