TEMPERATURE SENSOR CODE NEEDED USING PIC18F46K20

[jmie]

i am required to setup the PIC18F46K20 and enable the ADC module to read a temperature sensor using PIC then display at LCD...I'm using MCP9700 and the temperature range from -40 to +125 deg C. i'm learn a BASIC for the code. can anyone help to provide the code? thx in advance...

 

[Tahmid]

Hi,
I can help you with the code if you can use mikroBASIC compiler.
https://www.mikroe.com
Tahmid.

 

[jmie]

tq tahmid for your reply..

can u give me the code if u use mikroBASIC compiler.

tq

 

[Tahmid]

Hi,

program MC9700_Temp

dim LCD_RS as sbit at RC4_bit
    LCD_EN as sbit at RC5_bit
    LCD_D4 as sbit at RC0_bit
    LCD_D5 as sbit at RC1_bit
    LCD_D6 as sbit at RC2_bit
    LCD_D7 as sbit at RC3_bit

    LCD_RS_Direction as sbit at TRISC4_bit
    LCD_EN_Direction as sbit at TRISC5_bit
    LCD_D4_Direction as sbit at TRISC0_bit
    LCD_D5_Direction as sbit at TRISC1_bit
    LCD_D6_Direction as sbit at TRISC2_bit
    LCD_D7_Direction as sbit at TRISC3_bit

dim ADRead as word
dim Temp as longword
dim vDisp as word[3]
dim Display as string[7]

main:
     TRISA = $FF
     TRISC = 0
     PORTC = 0
     LCD_Init()
     LCD_Cmd(_LCD_CURSOR_OFF)
     LCD_Cmd(_LCD_CLEAR)
     LCD_Out(1, 1, "Temp:")
     Display = "+125 'C"
     while true
           ADRead = ADC_Read(0)
           if (ADRead > 102) then 'If temperature is positive
              Temp = (100 * ( (10 * ADRead) - 1024 ) ) >> 11 'Get temperature
              Display[0] = "+"
           else 'If temperature is negative
              Temp = ( (1024 - (10 * ADRead) ) * 100 ) >> 11 'Get temperature
              Display[0] = "-"
           end if
           vDisp[0] = Temp div 100
           vDisp[1] = (Temp div 10) mod 10
           vDisp[2] = Temp mod 10
           Display[1] = vDisp[0] + 48
           Display[2] = vDisp[1] + 48
           Display[3] = vDisp[2] + 48
           LCD_Out(1, 8, Display) 'Show temperature
     wend
end.