stc单片机AD 8位和10位数值通过1602液晶显示

/*------------------------------------------------------------------*/ /* --- 10位AD转换并把数值显示在LCD1602液晶上并控制蜂鸣器 ---------*/ /* --- STC12C5Axx Series MCU A/D Conversion Demo -------------------*/ /* --- 程序创建时间：2015年11月9日20:47:45 -------------------------*/ /*----液晶显示内容请自行更改----------------------------------------*/ /*-----程序作者：李洋（部分代码STC官网复制）------------------------*/ #include "config.h" #include "intrins.h" #include "main.h" #include "lcd1602.h" #define FOSC 11059200L #define BAUD 9600 #define MODE 2 // 模式1为8位AD // 模式2为10位AD sbit BUZZ = P1^6; //蜂鸣器 /*Define ADC operation const for ADC_CONTR*/ #define ADC_POWER 0x80 //ADC power control bit #define ADC_FLAG 0x10 //ADC complete flag #define ADC_START 0x08 //ADC start control bit #define ADC_SPEEDLL 0x00 //420 clocks #define ADC_SPEEDL 0x20 //280 clocks #define ADC_SPEEDH 0x40 //140 clocks #define ADC_SPEEDHH 0x60 //70 clocks bit buzzOn = 0; //蜂鸣器标志 uint8 T0RH; uint8 T0RL; /*********************************** 主程序 ***********************************/ void main() { float Value2; //10位ADC值 uint8 Value1; //8位ADC值 uint8 ADCStr[10]; InitADC(); //初始化ADC Init1602(); EA = 1; ConfigTimer0(1); //配置定时器0 1MS while (1) { //LcdShowStr(0,1," TSET "); #if MODE == 1 //8位模式 { Value1 = GetADCResult(7); //获取通道7的数值 ValToString1(ADCStr, Value1); //数值转换 } #else if MODE == 2 //10位模式 { Value2 = GetADCResult(7); //获取通道7的数值 ValToString2(ADCStr, Value2); //数值转换 } #endif LcdShowStr(0,0,ADCStr); //显示在液晶上 } } /****************************************** 8位ADC数值转换 *********************************************/ void ValToString1(uint8 *str, uint8 val) //8位AD转换 { uint8 value; value = (val*50)/256; //计算公式：ADC_RES = 256* (val/vin) str[0] = value/10 + '0'; //显示整数部分 str[1] = '.'; str[2] = value%10 + '0'; //小数部分 str[3] = 'v'; str[4] = '\0'; if(value <= 9) //0.9v开蜂鸣器 { TR0 = 1; buzzOn = 1; } else if(value >= 13) //1.3关闭蜂鸣器 { buzzOn = 0; TR0 = 0; } } /************************************************** 10位ADC数值转换 **********************************************/ void ValToString2(uint8 *str, float val) //10位AD转换 { float value; value = (val*5)/1024.0; //计算公式：ADC_RES+ADC_RESL = 1024*(val/vin) value = value*1000; str[0] = (int)value/1000 + '0'; //整数部分 str[1] = '.'; str[2] = (int)value/100%10 + '0'; //小数部分1 str[3] = (int)value%10 + '0'; //小数部分2 str[4] = 'v'; str[5] = '\0'; if(value <= 900) //0.9v时开启蜂鸣器 { buzzOn = 1; TR0 = 1; } else if(value >= 1300) //1.3v关闭蜂鸣器 { buzzOn = 0; TR0 = 0; } } /*---------------------------- Get ADC result获取AD结果 ----------------------------*/ uint16 GetADCResult(uint8 ch) { ADC_CONTR = ADC_POWER | ADC_SPEEDLL | ch | ADC_START; _nop_(); //Must wait before inquiry _nop_(); _nop_(); _nop_(); while (!(ADC_CONTR & ADC_FLAG));//Wait complete flag ADC_CONTR &= ~ADC_FLAG; //Close ADC #if MODE == 1 //返回8位ADC数值 { return ADC_RES; } #else if MODE == 2 //返回10ADC数值 { return (ADC_RES*4 + ADC_RESL); } #endif //Return ADC result } /*---------------------------- 配置定时器 ----------------------------*/ void ConfigTimer0(uint8 ms) //配置定时器0 { uint32 tmp; TMOD &= 0xF0; TMOD |= 0x01; tmp = 11059200/12; tmp = 65536 - (tmp * ms)/1000; T0RH = (uint8)(tmp>>8); T0RL = (uint8)tmp; TH0 = T0RH; TL0 = T0RL; ET0 = 1; } /*---------------------------- Initial ADC sfr初始化ADC寄存器 ----------------------------*/ void InitADC() { P1M1 = 0x80; //配置P1.7口为高阻输入 P1M0 = 0x00; P1ASF = 0x80; //只设置P1.7为AD输入端 ADC_RES = 0; ADC_RESL = 0; //Clear previous result清除以前的结果 ADC_CONTR = ADC_POWER | ADC_SPEEDLL; //开启AD电源 Delay(2); //ADC power-on and delay } /*---------------------------- Software delay function 延时 ----------------------------*/ void Delay(uint16 n) { uint16 x; while (n--) { x = 5000; while (x--); } } /********************************* 中断服务程序 ********************************/ void interruptTimer0() interrupt 1 //定时器0中断服务程序 { uint8 tmr50ms = 0; TH0 = T0RH; TL0 = T0RL; if(buzzOn) { BUZZ = ~BUZZ; } else { BUZZ = 1; } }