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  • in reply to: adc not working on hardware but works on proteus #15909
    Omeken
    Participant

    I mean changing RD1_bit = 0; to TRISD = ;

     

    in reply to: adc not working on hardware but works on proteus #15908
    Omeken
    Participant

    I have rectified the problem, the design is now working . I changed to
    RD0_bit = 0;
    RD1_bit =0 ; to TRISD = 0;

    • This reply was modified 4 years, 8 months ago by Ligo George.
    in reply to: adc not working on hardware but works on proteus #15900
    Omeken
    Participant

    I am with LM35, LCD 16*2, and 16F877A. I want to use different value (read temperature and reference temperature) of the temperature to on or off the two LED. The code is only controlling one LED RD0.

    // LCD module connections
    sbit LCD_RS at RB0_bit;
    sbit LCD_EN at RB1_bit;
    sbit LCD_D4 at RB2_bit;
    sbit LCD_D5 at RB3_bit;
    sbit LCD_D6 at RB4_bit;
    sbit LCD_D7 at RB5_bit;
    
    sbit LCD_RS_Direction at TRISB0_bit;
    sbit LCD_EN_Direction at TRISB1_bit;
    sbit LCD_D4_Direction at TRISB2_bit;
    sbit LCD_D5_Direction at TRISB3_bit;
    sbit LCD_D6_Direction at TRISB4_bit;
    sbit LCD_D7_Direction at TRISB5_bit;
    // End LCD module connections
    
    unsigned int read_value=0, ref_value;
    unsigned int value=0;
    unsigned int temp;
    char aux[7];
    
    void main()
    {
      RD0_bit = 0;
      RD1_bit =0;
      ADCON1 = 0x00; // All channels are config as analog I/p.
    
      ADC_Init();
      Lcd_Init(); // Initialize LCD
      Lcd_cmd(_lcd_clear);
      Lcd_Cmd(_LCD_CURSOR_OFF); // Cursor off
      Lcd_out(1,3,"Temperature:");
      LCD_Out(2,1,"Eff:    Ref:");
    
      while(1)
      {
        read_value = Adc_Get_Sample(2)>>2;
        ref_value  = ADC_Get_Sample(4)>>2;
    
        if (read_value < ref_value)
        {
          PORTD.RD0 = 1;
          if (read_value > ref_value)
            PORTD.RD1 = 1;
          else
            PORTD.RD1 =  0;
          PORTD.RD0 = 0;
        }
    
        value = (unsigned int) read_value * (500./255); // Resolution for 5 volts, 8 bits
        ByteToStr(value,Ltrim(aux));
        LCD_Out(2,5, aux); //shows reading temperature
    
        value = (unsigned int) ref_value * (500./255);
        ByteToStr(value,Ltrim(aux));
        LCD_Out(2,13, aux); //shows reference temperature
    
        delay_ms(50);
      }
    }
    
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