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PIC AD多通道转换方法 12864液晶显示

2013-11-21 10:26:28 6431

0 //USE ONE KEY TO TEST 5 CHANNELS VOLTAGE //USE PIC16F74-DIP LCD12864 //USE 16MHZ CRYSTAL #include #define uchar unsigned char #define uint unsigned int #define PORT_LCD_DAT PORTB #define TRIS_LCD_DAT TRISB #define _XTAL_FREQ 16000000UL//16MHZ OSC,CODE PERIOD 0.25US PER #define RS RD7//LCD PORT CONTROLL #define E RD6 #define beep RE2 #define key0 RD1 #define key1 RD0 #define key2 RC3 #define key3 RC2 //const uchar table[]={0x30,0x31,0x32,0x33,0x34,0x35,0x36,0x37,0x38,0x39};//0-9 ASCII CODE const uchar table[]="0123456789"; uint voltage; uint result; uchar adflag=1; void delay(uint); __CONFIG(0X0002);//HS CRYSTAL void delay(uint z) //DELAY FUNCtiON { uint x,y; for(x=z;x>0;x--) for(y=100;y>0;y--); } void write_lcd_command(uchar cmd)//LCD WRITE COMMAND FUNCTIONS { RD6=RD7=TRISD6=TRISD7=0;//SETTING PORT AS WRITE DIRECTION RS=0; TRIS_LCD_DAT=0X00; PORT_LCD_DAT=cmd; delay(6); E=1;delay(6);E=0; } void write_lcd_data(uchar dat)//LCD WRITE DATA FUNCTIONS { RS=1; TRIS_LCD_DAT=0X00;//SETTING PORT AS WRITE DIRECTION PORT_LCD_DAT=dat; delay(6); E=1;delay(6);E=0; } void lcd_initialize()//LCD INITALIZTIONS { write_lcd_command(0x30); write_lcd_command(0x01); write_lcd_command(0x06); write_lcd_command(0x0f); } void lcd_showstring(uchar r,uchar c,char str) { uchar i=0; if(r==0) write_lcd_command(0x80\|c);//LCD NO.1 else if(r==1) write_lcd_command(0x90\|c);//LCD NO.2 else if(r==2) write_lcd_command(0x88\|c);//LCD N0.3 else if(r==3) write_lcd_command(0x98\|c);//LCD NO.4 for(i=0;i<16&&str[i]!='';i++)//SIXTEEN WORDS OR EIGHT CHINESE WORDS write_lcd_data(str[i]); } void adc_convert()//ANALOG TO DIGITAL CONVERT PART { if(key0==0)//RECORD THE NUMBERS OF KEY DOWN { adflag++; if(adflag==4)//TOTAL TO 5,THEN RETURN 1 adflag=1; while(key0==0);//SELECT THE AD CHANNEL } if(adflag==1)//CHANNEL 0 { CHS2=CHS1=CHS0=0;lcd_showstring(1,0,(uchar)"channel 0");} else if(adflag==2)//CHANNEL 1 {CHS2=CHS1=0;CHS0=1;lcd_showstring(1,0,(uchar)"channel 1");} else if(adflag==3)//CHANNEL 2 {CHS2=0;CHS1=1;CHS0=0;lcd_showstring(1,0,(uchar)"channel 2");} else if(adflag==4)//CHANNEL 3 {CHS2=0;CHS1=1;CHS0=1;} else if(adflag==5)//CHANNEL 4 {CHS2=1;CHS1=0;CHS0=0;} __delay_ms(5); ADGO=1;while(ADGO); result=ADRES; } void display() { write_lcd_command(0x80); write_lcd_data(table[result/100%100]); write_lcd_data(table[result/10%10]); write_lcd_data(table[result%10]); lcd_showstring(2,0,(uchar)"voltage test"); lcd_showstring(3,0,(uchar)"by bright"); } void main() { PCFG2=0;PCFG1=0;PCFG0=0; ADCS1=0;ADCS0=1; TRISB=0X00; PORTB=0X00; TRISD=0XFF; PORTD=0XFF; ADON=1; GIE=1; lcd_initialize(); __delay_ms(700); while(1) { adc_convert(); display(); } } 0
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