/* Project: Digital Voltmeter based on PIC16F877  Oscillator @ 4MHz, MCLR Enabled, PWRT Enabled, WDT OFF     */  // LCD module connections  sbit LCD_RS at RB0_bit;  sbit LCD_EN at RB1_bit;  sbit LCD_D4 at RB4_bit;  sbit LCD_D5 at RB5_bit;  sbit LCD_D6 at RB6_bit;  sbit LCD_D7 at RB7_bit;  sbit LCD_RS_Direction at TRISB0_bit;  sbit LCD_EN_Direction at TRISB1_bit;  sbit LCD_D4_Direction at TRISB4_bit;  sbit LCD_D5_Direction at TRISB5_bit;  sbit LCD_D6_Direction at TRISB6_bit;  sbit LCD_D7_Direction at TRISB7_bit; // End LCD module connections char Message1[] = "DVM Project"; unsigned int ADC_Value, DisplayVolt; char *volt = "00.0"; void main() { ADCON0 = 0 ; // Analog channel select @ AN0  ADCON1 = 0b00001110 ; // RA0/AN0 is analog input    TRISB = 0b00000000; // PORTB All Outputs  TRISA = 0b00000001; // PORTA All Outputs, Except RA0   Lcd_Init();        // Initialize LCD  Lcd_Cmd(_LCD_CLEAR);      // CLEAR display  Lcd_Cmd(_LCD_CURSOR_OFF); // Cursor off  Lcd_Out(1,1,Message1);  Lcd_Chr(2,10,'V'); do {   ADC_Value = ADC_Read(0);   DisplayVolt = ADC_Value * 2;   volt[0] = DisplayVolt/1000 + 48;   volt[1] = (DisplayVolt/100)%10 + 48;   volt[3] = (DisplayVolt/10)%10 + 48;   Lcd_Out(2,5,volt);   delay_ms(500);   // Hold for 500 ms  } while(1);} // End main()