#include <reg52.h> #include <intrins.h> #include <math.h> /**********************************8/ /**********LCD1602接口程序**********/ #define DD P2 sbit Rs=P3^0; sbit Rw=P3^1; sbit E=P3^2; sbit busy_p=ACC^7; /********************************/ void delay_1ms(unsigned char i) //最小延时1ms { unsigned char j; while(i--) for(j=0;j<125; j++); } void delay_10ns(unsigned char i) //最小延时10ns { unsigned char j; while(i--) for(j=0;j<10; j++); } void write_com(unsigned char com,bit p) //写指令 {if(p) delay_10ns(5); E=0; Rs=0; Rw=0; DD=com; delay_10ns(50); //>40ns E=1; delay_1ms(2); //>150ns E=0; delay_10ns(4); //>25+10ns } void write_date(unsigned char DATA) //写数据 { delay_10ns(50); E=0; Rs=1; Rw=0; DD=DATA; delay_10ns(50); E=1; delay_10ns(50); E=0; delay_10ns(4); } void addr_x_y(unsigned char x,bit y) //写坐标,定位置 { unsigned char temp=0x80; if(y) {temp|=0x40;} temp|=x; write_com(temp,0); } void desplay_char(unsigned char x,bit y,unsigned char p) //在指定位置显示一个字符。 { addr_x_y(x,y); write_date(p); } void init(void) {delay_1ms(15); write_com(0x38,0); delay_1ms(5); write_com(0x38,0); delay_1ms(5); write_com(0x38,0); delay_1ms(5); write_com(0x38,1); write_com(0x08,1); write_com(0x01,1); write_com(0x06,1); write_com(0x0c,1); } void xs_int(unsigned int shuju,bit t) //显示一个数字 {unsigned char huancun[6]={0}; unsigned char biaozhi=0,i; if (shuju < 10) biaozhi = 1; else if(shuju < 100) biaozhi = 2; else if(shuju < 1000) biaozhi = 3; else if(shuju < 10000) biaozhi = 4; else if(shuju < 65535) biaozhi = 5; switch(biaozhi) {case 5:huancun[5] = shuju/10000; case 4:huancun[3] = shuju%10000/1000; case 3:huancun[2] = shuju%1000/100; case 2:huancun[1] = shuju%100/10; case 1:huancun[0] = shuju%10; break; default:break; } for(i=6;i>1;i--) {if(i==5)desplay_char(10,1,'.'); else desplay_char(15-i,t,0x30+huancun[i-1]); } desplay_char(15,t,'V'); } /************************************************************/ /**********ADC0832接口程序************************************/ sbit ADC_CS =P3^4; sbit ADC_CLK=P3^5; sbit ADC_DO =P3^6; sbit ADC_DI =P3^7; /*******************************************************************/ void Delay(unsigned char j) { unsigned char i; for(i=0;i<j;i++); //延时,脉冲一位持续的时间 } unsigned char ADC0832(void) //把模拟电压值转换成8位二进制数并返回 { unsigned char i,data_c; data_c=0; ADC_CS=0; ADC_DO=0;//片选,DO为高阻态 for(i=0;i<10;i++) {;} ADC_CLK=0; Delay(2); ADC_DI=1; ADC_CLK=1; Delay(2); //第一个脉冲,起始位 ADC_CLK=0; Delay(2); ADC_DI=1; ADC_CLK=1; Delay(2); //第二个脉冲,DI=1表示双通道单极性输入 ADC_CLK=0; Delay(2); ADC_DI=1; ADC_CLK=1; Delay(2); //第三个脉冲,DI=1表示选择通道1(CH2) ADC_DI=0; ADC_DO=1;//DI转为高阻态,DO脱离高阻态为输出数据作准备 ADC_CLK=1; Delay(2); ADC_CLK=0; Delay(2);//经实验,这里加一个脉冲AD便能正确读出数据, //不加的话读出的数据少一位(最低位d0读不出) for (i=0; i<8; i++) { ADC_CLK=1; Delay(2); ADC_CLK=0; Delay(2); data_c=(data_c<<1)|ADC_DO;//在每个脉冲的下降沿DO输出一位数据,最终ch为8位二进制数 } ADC_CS=1;//取消片选,一个转换周期结束 return(data_c);//把转换结果返回 } void main(void) { unsigned int data_temp=0; while(1) { data_temp=ADC0832(); init(); xs_int(196*data_temp,1); } } |