STC12C5A60SAD转换及LCD1602显示

1、/*我写的51AD转换程序，LED灯显示，随着外部电压升高，亮的小灯数会逐渐增加*/#include/庖含单片机寄存器的头文件#include/包含_nop_()函数定义的头文件/A/D转换结果变量unsignedcharresult;voidmain(void)unsignedlongi;unsignedcharstatus;ADC_CONTR|=0x80;for(i=0;i10000;i+);P1ASF=0x04;ADC_CONTR=0xE2;for(i=0;i10000;i+);/开A/D转换电源，第一次使用时要打开内部模拟电源/适当延时/选择P1.2作为A/D转换通道/适当延时whil

2、e(1)循环进行A/D转换ADC_CONTR|=0x08;/启动A/D转换status=0;while(status=0)/等待A/D转换结束status=ADC_CONTR&0x10;ADC_CONTR&=0xE7;/将ADC_FLAG青0result=ADC_RES;/保存A/D转换结果if(result32)P0=0xff;elseif(result64)P0=0xfe;elseif(result96)P0=0xfc;elseif(result128)P0=0xf8;elseif(result160)P0=0xf0;elseif(result192)P0=0xe0;elseif(resu

3、lt214)P0=0xc0;elseif(result236)P0=0x80;elseP0=0x00;/*/*_*功能【AD转换,液晶显示】*/*_*芯片:STC12C5A60S2*%-*/*_*液晶：【LCD1602*/*_*ADC管月却：【P1.0P1.7】*/*-*检测范围:【0.004.99V】*/*/#includereg52.h”#includeintrins.htypedefunsignedcharuchar;typedefunsignedintuint;#define_Nop()_nop_()/*以下为LCD1602显示模块定义*/unsignedchardata_char_t

4、able=0123456789ABCDEF;/LCD数据unsignedcharLcd_Dis1_table=Position:No.;/第一行显示框架unsignedcharpos_char_table=D;/显示位置unsignedcharLcd_Dis2_table=Voltage:V;/第二行显示框架unsignedcharnum_char_table=9A.CDV;/显示位置sbitlcd_rs_port=P2A7;sbitlcd_rw_port=P2A6;sbitlcd_en_port=P2A4;#definelcd_data_portP0voidlcd_delay(ucharms

5、);voidlcd_busy_wait();voidlcd_command_write(uintcommand);voidlcd_system_reset();voidlcd_char_write(uintx_pos,y_pos,lcd_dat);voidlcd_bad_check();voidNum_to_Disp(uchari,uintNum);voidLcdDisp(ucharj,uintnum);/定义LCD控制端口，根据硬件调整/LCD1602延时/LCD1602忙等待/LCD1602命令字写入/LCD1602初始化/LCD1602字符写入/LCD1602坏点检查/显示数据处理/液晶

6、显示函数/*以下为ADC相应寄存器初始化及端口定义*/*定义与ADC相关的特殊功能寄存器*/sfrADC_CONTR:=0xBCsfrADC_RES=0xBD;sfrADC_RESL=0xBE;sfrP1ASF=0x9D;/ADC控制寄存器/ADChight8-bitresultregister/ADClow2-bitresultregister/P1口功能控制寄存器P1ASF/*定义相应操作位*/#defineADC_POWER0x80/ADC电源控制位，0:关闭，1:打开#defineADC_FLAG0x10/ADC结束标志位#defineADC_START0x08/ADC启动控制位#de

7、fineADC_SPEEDLL0x00/540clocks选择转换速度/*以下为相关函数声明*/voidInitADC();/ADC初始化uintGetADCResult(ucharch);voidDelay(uintn);/延时程序voiddelay_1ms(ucharx);/*主函数*/voidmain()uchari;/LCD1602初始化/LCD1602坏点检查/初始化ADC特殊功能寄存器lcd_system_reset();lcd_bad_check();InitADC();while(1)i=0;while(i7)LcdDisp(i,GetADCResult(i);/液晶1602显

8、示输入电压值P1.0-P1.7Delay(1000);i+;/*ADC取值*/uintGetADCResult(ucharch)ADC_CONTR=ADC_POWER|ADC_SPEEDLL|ch|ADC_START;_nop_();/Mustwaitbeforeinquiry_nop_();_nop_();_nop_();while(!(ADC_CONTR&ADC_FLAG);/WaitcompleteflagADC_CONTR&=ADC_FLAG;/CloseADC/ReturnADCresultreturn(ADC_RES*4+ADC_RESL);/*初始化ADC特殊功能寄存器*/voi

9、dInitADC()P1ASF=P1|0x3f;/SetP1.0-P1.5asanaloginputportADC_RES=0;/ClearpreviousresultADC_RESL=0;ADC_CONTR=ADC_POWER|ADC_SPEEDLL;Delay(20);/ADCpower-ondelayandStartA/Dconversion/*LCD1602相应函数*/以下为LCD显示数据处理/voidNum_to_Disp(uchari,uintNum)floatNUM;intxx,yy,zz;NUM=(Num*5/1024.0);/计算公式：10-bitA/DConversionR

10、esult=1024x(Vin/Vcc)xx=(int)NUM;yy=(int)(NUM-(float)(xx)*10);zz=(int)(NUM-(float)(xx)*100)%10;/电压值十位/电压值个位/电压值小数点后一位/电压值小数点后两位？/当前ADC接口num_char_table9=data_char_tablexx/10;num_char_table10=data_char_tablexx%10;num_char_table12=data_char_tableyy;num_char_table13=data_char_tablezz;pos_char_table13=dat

11、a_char_tablei;/以下为LCD显示/voidLcdDisp(ucharj,uintnum)uinti=0;for(i=0;i16;i+)lcd_char_write(i,0,Lcd_Dis1_tablei);lcd_char_write(i,1,Lcd_Dis2_tablei);/显示框架Num_to_Disp(j,num);lcd_char_write(13,0,pos_char_table13);for(i=9;i14;i+)lcd_char_write(i,1,num_char_tablei);/显示电压delay_1ms(100);/以下是LCD1602驱动程序/voidl

12、cd_delay(ucharms)/*LCD1602延时*/ucharj;while(ms-)for(j=0;j250;j+);voidlcd_busy_wait()/*LCD1602忙等待*/lcd_rs_port=0;lcd_rw_port=1;lcd_en_port=1;lcd_data_port=0xff;while(lcd_data_port&0x80);lcd_en_port=0;voidlcd_command_write(uintcommand)/*LCD1602命令字写入*/lcd_busy_wait();lcd_rs_port=0;lcd_rw_port=0;lcd_en_p

13、ort=0;lcd_data_port=command;lcd_en_port=1;lcd_en_port=0;voidlcd_system_reset()/*LCD1602初始化*/lcd_delay(20);lcd_command_write(0x38);lcd_delay(100);lcd_command_write(0x38);lcd_delay(50);lcd_command_write(0x38);lcd_delay(10);lcd_command_write(0x08);lcd_command_write(0x01);lcd_command_write(0x06);lcd_com

14、mand_write(0x0c);字符写入*/voidlcd_char_write(uintx_pos,y_pos,lcd_dat)/*LCD1602x_pos&=0x0f;/*X位置范围015*/y_pos&=0x01;/*Y位置范围01*/if(y_pos=1)x_pos+=0x40;x_pos+=0x80;lcd_command_write(x_pos);lcd_busy_wait();lcd_rs_port=1;lcd_rw_port=0;lcd_en_port=0;lcd_data_port=lcd_dat;lcd_en_port=1;lcd_en_port=0;voidlcd_bad_check()/*LCD1602坏点检查*/chari,j;for(i=0;i2;i+)for(j=0;j16;j+)lcd_char_write(j,i,0xff);lcd_delay(200);lcd_delay(200);