1、/*Declare SFR associated with the ADC */sfr ADC_CONTR=0xBC;/ADC control registersfr ADC_RES0xBD;/ADC high 8-bit result registersfr ADC_RESL =0xBE; /sfr ADC_LOW2/ADC low 2-bit result register sfr P1ASF0x9D;/P1 secondary function control register/*Define ADC operation const for ADC_CONTR*/#define ADC_
2、POWER0x80/ADC power control bit#define ADC_FLAG 0x10/ADC complete flag 模数转换结束标志位#define ADC_START0x08/ADC start control bit模数转换启动控制位/转换速度控制位SPEED0和SPEED1,共四种状态,对应四种转换速度#define ADC_SPEEDLL 0x00/540 clocks #define ADC_SPEEDL0x20/360 clocks#define ADC_SPEEDH0x40/180 clocks#define ADC_SPEEDHH 0x60/90 cl
3、ocksuchar tCount;sbit RS = P04;sbit RW = P05;sbit EN = P06;void DelayMS(uint ms)uint i;while(ms-) for(i=0;i120;i+);/*-Software delay function-*/void Delay(uint n) uint x; while (n-) x = 5000;while (x-); Initial ADC sfrvoid InitADC() P1ASF = 0x01; /选择P1.0作为A/D输入通道 ADC_RES = 0;/清0 ADC_CONTR = ADC_POWE
4、R | ADC_SPEEDLL;/0x10|0x00=0x10:开电源和设置A/D转换速度 Delay(2);/ADC power-on and delayGet ADC resultuchar GetADCResult(uchar ch) ADC_CONTR = ADC_POWER | ADC_SPEEDLL | ch | ADC_START;/0x00|0x00|ch|0x08:选择A/D输入通道,开始A/D转换 _nop_();/Must wait before inquiry , /设置ADC_CONTR寄存器后需加4个CPU时钟周期的延时,才能保证值被写入ADC_CONTR寄存器 w
5、hile (!(ADC_CONTR & ADC_FLAG);/Wait complete flag ADC_CONTR &= ADC_FLAG;/Close ADC Vo=ADC_RES*5*10/256;/Return ADC result(为显示整数,这里将电压值扩大了十倍) return Vo;uchar Read_LCD_State() uchar state; RS=0; RW=1; EN=1; DelayMS(1); state=P2; EN = 0; return state;void LCD_Busy_Wait() while(Read_LCD_State()&0x80)=0x
6、80); DelayMS(5);void Write_LCD_Data(uchar dat)/写数据到1602 LCD_Busy_Wait(); RS=1; RW=0; EN=0; P2=dat;void Write_LCD_Command(uchar cmd) /写命令LCD_Busy_Wait(); P2=cmd;void Init_LCD()/1602初始化 Write_LCD_Command(0x38); Write_LCD_Command(0x01);/清屏 Write_LCD_Command(0x06);/ Write_LCD_Command(0x0c);void Set_LCD_
7、POS(uchar p) Write_LCD_Command(p|0x80);void Display_LCD_String(uchar p,uchar *s) /1602显示 uchar i; Set_LCD_POS(p);16;i+) Write_LCD_Data(s);void Format_DateTime(uchar d,uchar *a) a0=d/10+0; a1=d%10+/写入液晶第二行void display(uchar add,uchar date) uchar shi,ge; shi=date/10+ ge=date%10+ Write_LCD_Command(0x80
8、+0x40+add); Write_LCD_Data(shi); Write_LCD_Data(ge);/写入液晶第一行void display1(uchar add,uchar date) shi=date/10; ge=date%10; Write_LCD_Command(0x80+add); Write_LCD_Data(0x30+shi);/0x30即48(十进制)对应的ASCAII码为字符0 Write_LCD_Data(0x30+ge);void main() Init_LCD(); InitADC(); while (1) GetADCResult(0); Display_LCD_String(0,dianya:); display1(7,Vo); Display_LCD_String(9,V DelayMS(1000);程序二:* 文件名:AD_CAIYANG.C* 功能:使用AD采
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