ad.zip_stc ad

#include <intrins.h> #include <STC12C5620AD.h> /* sfr P1M0 = 0x91; sfr P1M1 = 0x92; sfr ADC_CONTR = 0xC5; sfr ADC_DATA = 0xC6; sfr ADC_LOW2 = 0x0BE; */ #define uint unsigned int sbit p1 = P1^0; sbit p2 = P1^1; sbit p3 = P1^2; sbit p4 = P1^3; sbit p5 = P1^4; #define p0 P1 sbit adc_power = 0xB7; sbit adc_flag = 0xB4; sbit adc_start = 0xB3; sbit chs2 = 0xB2; sbit chs1 = 0xB1; sbit chs0 = 0xB0; sbit speed1 = 0xB6; sbit speed = 0xB5; void channel1(); void channel2(); void channel3(); void channel4(); void channel5(); void error(); void delay(); uint voltage; void Initad() { P1M0 = 0x80; P1M1 = 0x80; ADC_CONTR |= 0x80; //ad上电 _nop_();_nop_;_nop_;_nop_;_nop_();_nop_();_nop_();_nop_(); ADC_CONTR |= 0x07; //选择模拟量输入通道 _nop_();_nop_;_nop_;_nop_;_nop_();_nop_();_nop_();_nop_(); ADC_DATA = 0x00; ADC_LOW2 = 0x00; } uint getdata () { uint temp,dat; ADC_CONTR |= 0x08; _nop_();_nop_();_nop_();_nop_();_nop_();_nop_();_nop_(); while (!(ADC_CONTR & 0x10)); ADC_CONTR &= 0x0EF; _nop_();_nop_();_nop_();_nop_();_nop_();_nop_();_nop_(); temp = ADC_DATA; temp = (temp << 2 ) + ADC_LOW2; dat = temp/1024.0*5; /* temp = ADC_DATA; temp <<= 2; temp |= ADC_LOW2; cache[0] = temp/1000000000*512.0; cache[1] = temp/100000000*256.0; cache[2] = temp/10000000*128.0; cache[3] = temp/1000000*64.0; cache[4] = temp/100000*32.0; cache[5] = temp/10000*16.0; cache[6] = temp/1000*8.0; cache[7] = temp/100*4.0; cache[8] = temp/10*2.0; cache[9] = temp%10*1.0; for(a=0;a<10;a++) { dat += cache[a]; } dat = dat/1024*5.0; */ return (dat); } void main () { Initad(); p0 = 0xff; while ( 1) { voltage = getdata (); if ( (voltage >=0)&&(voltage<1)) { channel1(); } else if ((voltage >=1)&&(voltage<2)) { channel2(); } else if ((voltage >=2)&&(voltage<3)) { channel3(); } else if ((voltage >=3)&&(voltage<4)) { channel4(); } else { channel5(); } } } void channel1() { p1 = 1;p2 = 0; p3 = 0; p4 = 0; p5 = 0; } void channel2() { p1 = 0;p2 = 1; p3 = 0; p4 = 0; p5 = 0; } void channel3() { p1 = 0;p2 = 0; p3 = 1; p4 = 0; p5 = 0; } void channel4() { p1 = 0;p2 = 0; p3 = 0; p4 = 1; p5 = 0; } void channel5() { p1 = 0;p2 = 0; p3 = 0; p4 = 0; p5 = 1; } void delay(void) //误差 0us { unsigned char a,b,c; for(c=1;c>0;c--) for(b=142;b>0;b--) for(a=2;a>0;a--); }