collecting the ADC value

[Mohamed Rasheed]

guys i need your help... im using a TEMP sensor and an LED. i need to turn ON the LED what a certain temp. is this code correct.

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Code C - [expand]
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#include<htc.h>
#include<pic.h>
 
#define _XTAL_FREQ 20000000
 
void InitADC(void)
{
ADCON1 = 0x80; // Make PORTA and PORTE analog pins
// Also, Vref+ = 5v and Vref- = GND
TRISA = 0x2f; // Make RA5, RA3, RA2, RA1, RA0 input
TRISE = 0x07; // Make RE0, RE1 and RE2 input
ADCON0 = 0x81; // Turn on the A/D Converter
}
 
unsigned int GetADCValue(unsigned char Channel)
{
ADCON0 &= 0xc7; // Clear Channel selection bits
ADCON0 |= (Channel<<3); // Select channel pin as ADC input
 
__delay_ms(10); // Time for Acqusition capacitor 
// to charge up and show correct value
GO_nDONE = 1; // Enable Go/Done
 
while(GO_nDONE); // Wait for conversion completion
 
return ((ADRESH<<8)+ADRESL); // Return 10 bit ADC value
}
 
void main()
{
 
unsigned int ADC_value = 0;
 
PORTB=0x00;
TRISB = 0x00; //PORTB as output
 
InitADC(); //Initializes ADC Module
#define Temp35 71
#define Temp25 51
while(1){
ADC_value = GetADCValue(0); //Reading Analog Channel 0
 
 
if (ADC_value>Temp35){
RB0=1;
}
 
__delay_ms(30); //Delay
}
}

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[andre_luis]

You forgot to turn OFF the LED otherwise :

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Code C - [expand]
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if (ADC_value>Temp35) 
{ RB0=1; }
else 
{ RB0=0; }

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+++

 

[Mohamed Rasheed]

thanx for the reply...

tried that but still does not work. im very new to this plx help me out.