' Name        : adcin3x.pbp
' Compiler    : PICBASIC PRO Compiler 2.6
' Assembler   : PM or MPASM
' Target PIC  : 40-pin 16F877A, 18F452 or similar
' Hardware    : Lab-X1
' Oscillator  : 4MHz external crystal
' Keywords    : ADC, ADCIN, ANALOG, LCDOUT, LCD
' Description : PICBASIC PRO program to display result of 
' 8-bit A/D conversion on LCD
'
' Connect analog inputs to channels 0, 1, 3 (RA0, 1, 3)

' Define LOADER_USED to allow use of the boot loader.
' This will not affect normal program operation.
Define  LOADER_USED 1

' Define LCD registers and bits
Define  LCD_DREG        PORTD
Define  LCD_DBIT        4
Define  LCD_RSREG       PORTE
Define  LCD_RSBIT       0
Define  LCD_EREG        PORTE
Define  LCD_EBIT        1

' Define ADCIN parameters
Define  ADC_BITS        8       ' Set number of bits in result
Define  ADC_CLOCK       3       ' Set clock source (3=rc)
Define  ADC_SAMPLEUS    50      ' Set sampling time in uS

adval Var Byte    ' Create adval to store result


  TRISA = %11111111   ' Set PORTA to all input
  ADCON1 = %00000100  ' Set PORTA analog

  Pause 500                       ' Wait .5 second


mainloop:
  Lcdout  $fe, 1    ' Clear the LCD

  Adcin 0, adval        ' Read the first ADC channel
  Lcdout  "0=", #adval  ' Send it to the LCD

  Adcin 1, adval        ' Read the second ADC channel
  Lcdout  " 1=", #adval ' Send it to the LCD

  Adcin 3, adval        ' Read the third ADC channel
  Lcdout  " 3=", #adval ' Send it to the LCD

  Pause   200           ' Delay for time to read the display

  Goto  mainloop        ' Do it forever

End