how to add the calculation of temperature in my source code

[Luciano]

Hi,

Try that on your breadboard.

(Click to enlarge the picture)

The original tutorial + code can be found here:
http://www.rentron.com/PicBasic/LM34.htm

LM35 datasheet:
http://www.national.com/ds/LM/LM35.pdf

The code below will work with the above connections.
Note that you will have to add the DEFINE + code for the LCD.

Best regards,

Luciano

DEFINE osc 4            ' We're using a 4 MHz oscillator
DEFINE ADC_BITS 8       ' Set A/D for 8-bit operation
DEFINE ADC_CLOCK 1      ' Set A/D clock Fosc/8
DEFINE ADC_SAMPLEUS 50  ' Set A/D sampling time @ 50 uS
' Add the LCD DEFINEs here <<<<<<<<<<<<<<<<<<<<<<<<<
samples VAR WORD        ' Multiple A/D sample accumulator
sample  VAR BYTE        ' Holds number of samples to take
temp    VAR BYTE        ' Temperature storage
samples = 0             ' Clear samples accumulator on power-up

    TRISA = %11111111   ' Set PORTA to all input
    ADCON1 = %00000011  ' Set PORTA.0,1,2,5 = A/D, PortA.3 = +Vref
    PAUSE 500           ' Wait .5 second

loop:

    FOR sample = 1 TO 20    ' Take 20 samples
        ADCIN 0, temp       ' Read channel 0 into temp variable
        samples = samples + temp ' Accumulate 20 samples
        PAUSE 250           ' Wait approximately 1/4 seconds per loop
    NEXT sample

    temp = samples/20
    
    LCDOUT $FE, 1 ' Clear LCD
    LCDOUT "Temp: ",DEC temp,"'C" 

    samples = 0             ' Clear old sample accumulator
    GOTO loop               ' Do it forever

    END