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16F88 ADC

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nuno12345

Joined: 16 Jul 2008
Posts: 50

16F88 ADC

Posted: Thu Aug 07, 2008 6:15 pm

Hi again, im trying to use the ADC of 16F88...
If I connect (completly turn my POT) to the "positive side" it reads well...
But if I decrease the POT strange characters start apearing :/

CODE:

Code:

#include <16F88.h>
#device adc=10

#fuses INTRC_IO, NOWDT, NOBROWNOUT, PUT, NOMCLR
#use delay(clock=4000000)

#include "flex_lcd.c"

long int q;
float p;
void main()
{

setup_adc( ADC_CLOCK_DIV_64 );
setup_adc_ports(sAN0);
set_adc_channel( 0 ); // AN0

lcd_init();
while(1)
{
q = read_adc();
p = 5.0 * q / 1024.0;
printf(lcd_putc, "\fADC = %4ld\nVoltage = %01.2fV", q, p);
delay_ms(200);
}
}

Connections:
#define LCD_DB4 PIN_B4
#define LCD_DB5 PIN_B5
#define LCD_DB6 PIN_B6
#define LCD_DB7 PIN_B7

#define LCD_RS PIN_B1
#define LCD_RW PIN_B2
#define LCD_E PIN_B3
//#define USE_LCD_RW 1

CCS Version: 4.074
JDM Programmer

Thanks

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