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manisha
Joined: 03 Feb 2012
Posts: 29
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| dspic33fj12mc202 getting reset when clock is added for adc |
 Posted: Sat Apr 20, 2013 6:19 am |
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Hai ....
I have programmed the dspic33fj12mc202 microcontroller and placed the crystal of 20 MHz and when IO operation,LCD is done the controller is working fine. When adc code is included i.e
setup_adc_ports(sAN0);
setup_adc(ADC_CLOCK_DIV_2 | ADC_TAD_MUL_2);
while(TRUE)
{
SET_ADC_CHANNEL(0);
delay_ms(10);
man=READ_ADC();
}
it is getting reset continuously and the error displayed if as
1) PC=00056A Interrupt vector for trap adrress error(0xffffff) is above last legal PC ()PC reset to zero.
2) two hardware traps found pending..
And my code is as follows:
| Code: | #include <33fj12mc202.h>
#device adc=10
//#FUSES WPRES32 //Watch Dog Timer PreScalar 1:32
//#FUSES WPOSTS1 //Watch Dog Timer PostScalar 1:1
#FUSES NOWDT
#FUSES FRC //High speed Osc (> 4mhz for PCM/PCH) (>10mhz for PCD)
#FUSES NOCKSFSM //Clock Switching is enabled, fail Safe clock monitor is enabled
#FUSES NOPUT //No Power Up Timer
#FUSES NOJTAG //JTAG disabled
#use delay(clock=20000000)//,OSC_INTERNAL)
#use RS232(baud=9600,xmit=pin_B11,rcv=pin_B12,bits=8,stop=1,parity=n,ERRORS,STREAM=PC)
#byte PORTA = 0x02C2
#byte PORTB = 0x02CA
#include<float.h>
#include<math.h>
#include<stddef.h>
#include<string.h>
#include<stdlib.h>
VOID init_io()
{
set_tris_a(0x0001);
set_tris_b(0x0000);
}
#separate
void main(){
init_io();
delay_ms(10);
setup_adc_ports(sAN0);
setup_adc(ADC_CLOCK_DIV_2 | ADC_TAD_MUL_2);
while(TRUE)
{
int16 i;
output_high(PIN_B6);
output_high(PIN_B7);
SET_ADC_CHANNEL(0);
delay_ms(10);
man=READ_ADC();
output_low(PIN_B7);
delay_ms(500);
}
}
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Please reply me with solutions to the above problem... |
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temtronic
Joined: 01 Jul 2010
Posts: 9205
Location: Greensville,Ontario
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| Posted: Sat Apr 20, 2013 8:16 am |
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a quick glance shows...
man=READ_ADC();
yet variable "man" doesn't seem to be previously defined as int16.It may not be the real problem but could cause the compiler to not work right.
also get rid of everything not needed to show the problem,including float.h,math.h,etc.
reduce the code to bare minimum that fails ,it'll be a lot easier to debug.
hth
jay |
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