PIC18F单片机ADC+UART+TIMER

//#include<pic18f45k20.h> #include <pic18.h> #define uchar unsigned char #define uint unsigned int __CONFIG(1, IESOEN&FCMDIS&RCIO ); __CONFIG(2, WDTDIS&BORV27&BOREN_XSLP&PWRTEN ); //__CONFIG(3, &&& ); uint Cnt; uint get_adc(uchar HL); void delay(uint c) { uint a,b; for(a=c;a>0;a--) for(b=110;b>0;b--); } void init() { OSCCON = 0x57; //内部振荡器 4M 晶振 TRISD = 0x00; PORTD = 0xff; T0CON = 0x80; TMR0IE = 1; TMR0L=(65536-1000)%256; TMR0H=(65536-1000)/256; TRISA = 0x01; ANSEL = 0x01; ADCON0 = 0x01; ADCON1 = 0; ADCON2 = 0xa9; // delay(5); // GODONE = 1; TRISC=0x80; TXSTA=0x24; RCSTA=0x90;//接收状态和控制寄存器 SPBRG=25; //波特率设置为9600 25 //119200 12 GIE=1; //开放全局中断 PEIE=1; //使能外部中断 RCIE=1; } void main() { uint Dtmp,ADCNum; uchar i,num[4]; init(); while(1) { if(Cnt<500) { PORTD = 0x55; } else if(Cnt<1000) { PORTD = 0xaa; } else { Cnt = 0; ADCNum = get_adc(0x01); num[0]=ADCNum/1000; num[1]=ADCNum%1000/100; num[2]=ADCNum%100/10; num[3]=ADCNum%10; for(i=0;i<4;i++) { num[i]=num[i]+0x30; TXREG=num[i]; while(!TRMT); num[i]=0; } TXREG=' '; while(!TRMT); } } } uint get_adc(uchar HL) { uint adc_val; ADCON0=HL;//0x81; GODONE = 1; while(GODONE); ADIF = 0; adc_val=ADRESH; adc_val = adc_val<<8 | ADRESL; return adc_val; } void interrupt com() { if(TMR0IF) { TMR0IF=0; TMR0L=(65536-1000)%256; TMR0H=(65536-1000)/256; Cnt++; } if(RCIE&&RCIF) //判断是否为串口接收中断 { TXREG=RCREG; //把接收到的数据发送回去 while(!TRMT); } }