PIC18F2431 X A/D

[alcomen]

I am using PIC18F2431 for the first time. Somebody possess an example of as to configure the A/D for this chip?

Somebody obtained 200ksps converter?



Alessandro

[PCM programmer]

I don't have this PIC to test, but I think the following program will
demonstrate basic operation of the A/D. It should display values
from 0x000 to 0x3FF for an input of 0v to +5v on the AN0 pin.

[alcomen]

Ok

I tested in my house your code. It's right. Tomorrow I go to test in the my job with oscilloscope for the time test acquisition.

Thanks


Alessandro

[alcomen]

I got 155ksps.

I don� understand why my code only execute the interrupt.

The exemple:

#include <18F2431.h>
#device adc=10
#fuses HS,NOWDT,NOPROTECT,BROWNOUT,PUT,NOLVP
#use delay(clock=20000000)
#use rs232(baud=9600, xmit=PIN_C6, rcv=PIN_C7, ERRORS)

//================================

#int_timer1
void isr()
{
result = read_adc();
set_timer1(65534);
}

//================================
void main()
{
int16 result;

setup_adc_ports(sAN0 | VSS_VDD);
setup_adc(ADC_CLOCK_DIV_16); // For 20 MHz crystal
set_adc_channel(0);
delay_us(20);

setup_timer_1(T1_internal);
set_timer1(65534);
enable_interrupts(int_timer1);
enable_interrupts(global);


while(1)
{
printf("%LX\n\r", result);
delay_ms(500);
}

}

This dont print in serial, only read the A/D. Why??????

Thanks



Alessandro