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单片机温度监控系统的设计第3页

更新时间：2009-10-24: 来源：毕业论文

单片机温度监控系统的设计第3页
if(a!=0xff)
        RD1=1;
        else RD1=0;
}
else if((temp>=templ)&&(temp<=temph))
{
  a=0;
  RD0=0;
  RD1=0;
}
for(delay=0xFff;delay>0;delay--) asm("nop");
}
#include <pic.h>
//*************************
unsigned char txbuf[5];
unsigned char rxbuf[5];
extern unsigned int delay;
unsigned char s_uart_buf;
unsigned char rx_lo_buf;
extern unsigned char i;
//*************************
void TXPC(unsigned char byte)//9600b/s
{
RC6 = 0;//start bit
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else RC6=0;
for(s_uart_buf=0;s_uart_buf<35;s_uart_buf++)asm("nop");
if(byte&0x08)RC6=1;
else RC6=0;
for(s_uart_buf=0;s_uart_buf<35;s_uart_buf++)asm("nop");
if(byte&0x10)RC6=1;
else RC6=0;
for(s_uart_buf=0;s_uart_buf<35;s_uart_buf++)asm("nop");
if(byte&0x20)RC6=1;
else RC6=0;
for(s_uart_buf=0;s_uart_buf<35;s_uart_buf++)asm("nop");
if(byte&0x40)RC6=1;
else RC6=0;
for(s_uart_buf=0;s_uart_buf<35;s_uart_buf++)asm("nop");
if(byte&0x80)RC6=1;
else RC6=0;
for(s_uart_buf=0;s_uart_buf<35;s_uart_buf++)asm("nop");
RC6=1;//stop bit
for(s_uart_buf=0;s_uart_buf<45;s_uart_buf++)asm("nop");
}
//*************************************************
unsigned char RXPC(void)//9600b/s
{
rx_lo_buf=0;
while(1)
{
  if(!RC7) break;
}
//receive start bit
for(s_uart_buf=0;s_uart_buf<46;s_uart_buf++)continue;
//receive bit
for(s_uart_buf=0;s_uart_buf<17;s_uart_buf++)asm("nop");
if(RC7)rx_lo_buf=rx_lo_buf|0x01;
for(s_uart_buf=0;s_uart_buf<35;s_uart_buf++)asm("nop");
if(RC7)rx_lo_buf=rx_lo_buf|0x02;
for(s_uart_buf=0;s_uart_buf<35;s_uart_buf++)asm("nop");
if(RC7)rx_lo_buf=rx_lo_buf|0x04;
for(s_uart_buf=0;s_uart_buf<35;s_uart_buf++)asm("nop");
if(RC7)rx_lo_buf=rx_lo_buf|0x08;
for(s_uart_buf=0;s_uart_buf<35;s_uart_buf++)asm("nop");
if(RC7)rx_lo_buf=rx_lo_buf|0x10;
for(s_uart_buf=0;s_uart_buf<35;s_uart_buf++)asm("nop");
if(RC7)rx_lo_buf=rx_lo_buf|0x20;
for(s_uart_buf=0;s_uart_buf<35;s_uart_buf++)asm("nop");
if(RC7)rx_lo_buf=rx_lo_buf|0x40;
for(s_uart_buf=0;s_uart_buf<35;s_uart_buf++)asm("nop");
if(RC7)rx_lo_buf=rx_lo_buf|0x80;
for(s_uart_buf=0;s_uart_buf<35;s_uart_buf++)asm("nop");

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