ad.rar_PIC_pic18 ad_proteus 10ad_电压 采样

#include <p18f8720.h> #pragma config WDT = OFF union adres { unsigned int y1; unsigned char adre[2]; }adresult; unsigned char i; unsigned int j; /* I/O initial */ void initial(void) { TRISD = 0X00; i = 0x00; } /*A/D change */ void adin(void) { ADCON0 = 0X01; ADCON1 = 0X00; ADCON2 = 0XBB; PIE1 = 0X00; PIE2 = 0X00; PIE1bits.ADIE = 0; INTCONbits.PEIE = 1; TRISAbits.TRISA0 = 1; INTCONbits.GIE = 1; } void delay(void) { for(j=65535; --j; )continue; } void alarm(void) { i = i^0xFF; PORTD = i; } unsigned int AD_Initial(void) //interrupt { char n; for(n=0;n<4;n++) { ADCON0bits.GO_DONE= 1; while(ADCON0bits.GO_DONE)continue; adresult.adre[0] = ADRESL; adresult.adre[1] = ADRESH; } return adresult.y1; } void main() { unsigned int res; adin(); initial(); while(1) { res=AD_Initial(); if(res > 0x100) { PORTDbits.RD0 = 0; delay(); } else if(res > 0x200) { PORTDbits.RD1 = 0; delay(); } else if(res > 0x300) { PORTDbits.RD2 = 0; delay(); } } }