18F67K22 - HELP SIMPLE ADC NOT WORKING

[imatos2]

Hi.
This is the first time I try to use this chip. 18F67k22.
Im using CCS 5.070. I can setup ADC converter for other chips but never for this one. Even the Wizard cant. I only want to make one Channel read 0~5vts and send to portB. But there must be something that is not correct or the version of CCs is not ok. Can anyone PLEASE !! HELP ME before I get crazy !! Thanks in advance.

[temtronic]

Please post your code ! A small test program will do.

[imatos2]

ADC works but the LED on RD1 was supposed to flash every 200ms but i tryied without success.

thanks


#include "18F67K22.h"

#fuses HSM,NOWDT,NOPROTECT,NOPUT,NOBROWNOUT,NOCPD,BORV18,NODEBUG,NOCPB,STVREN,NOPLLEN,NOFCMEN,SOSC_DIG
#device ADC=12

#BYTE PORTA = 0x0F80
#BYTE PORTB = 0x0F81
#BYTE PORTC = 0x0F82
#BYTE PORTD = 0x0F83
#BYTE PORTE = 0x0F84
#BYTE PORTF = 0x0F85
#BYTE PORTG = 0x0F86

#use delay(clock=16000000)

#define led pin_D1

void main() {
int16 mm;

set_tris_a(0X01);
set_tris_b(0x00);
set_tris_c(0x00);
set_tris_d(0x00);
set_tris_e(0x00);
set_tris_e(0x00);
set_tris_f(0x00);

PORTA = (0x00);
PORTB = (0x00);
PORTC = (0x00);
PORTD = (0x00);
PORTE = (0x00);
PORTF = (0x00);
PORTG = (0x00);

setup_oscillator(OSC_PLL_ON);

SETUP_ADC_PORTS(sAN0||VSS_VDD);
setup_adc (ADC_CLOCK_DIV_16|ADC_TAD_MUL_20);
set_adc_channel(0);
delay_ms(30);

while(true) {

mm=read_adc();
delay_ms(100);
output_b(mm);
if (mm>=300)
{
output_bit(LED,1);
delay_ms(200);
output_bit(LED,0);
delay_ms(200);

}}}

[Ttelmah]

First thing. Learn to use the code buttons!....

Now, what happens???. Tell us what you get?.

The 67K22 is a 'fussy' chip on it's power supply. It will not wake up
correctly is the rise time of the power supply is too slow. Have you tested
with a simple 'flash an LED' program to verify the chip actually is starting?.

Then second comment. You should always have PUT enabled with a crystal.

Now I'd definately re-think how you code your setup. I think you are
trying to run a 4MHz crystal, and clock at 16Mhz with the PLL from this?.
If so, setup as:

[PrinceNai]

As Mr. Ttelmah said, you are trying to show a 16 bit variable on an 8 bit port, so divide mm by 16 before sending it to PORTB. Connect AVDD and AVCC or ADC won't work, Third, you have a 100ms delay after each reading so LED isn't going to blink 200ms on, 200ms off. Just delete that row.

[E_Blue]

Are you powering the microcontroller with 5V?
_________________
Electric Blue

[imatos2]

Yes I am applying 5v to the Chip, To AVDD, AVSS
ADC works fine.
Just didn't know how to fix the oscillating frequency.
Thanks