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dspic basic program doesn't work

 
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danielz85



Joined: 22 Sep 2012
Posts: 37

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dspic basic program doesn't work
PostPosted: Sun Jan 20, 2013 1:24 pm     Reply with quote
hi,
I've recently purchased a dspic33FJ06GS202.
http://ww1.microchip.com/downloads/en/DeviceDoc/70318F.pdf
I've written the following code just as sanity check, but for some reason it just doesn't work.
Pickit2 programs and reads the program well and the voltages also seem to be fine. I thought maybe the clock doesn't work because I don't put any fuses, but I doubt that this is the reason.
Code:

#include <33FJ06GS202.h>
     
void main()
{
   SETUP_ADC_PORTS(NO_ANALOGS);
   set_tris_b(0x0);
   OUTPUT_b(0xFF);
   set_tris_a(0x0);
   OUTPUT_a(0xFF);
   while (1){

}

Any ideas or suggestions we be extremely welcome,
thanks
Ttelmah



Joined: 11 Mar 2010
Posts: 19537

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PostPosted: Sun Jan 20, 2013 1:42 pm     Reply with quote
You have the answer already:

"I thought maybe the clock doesn't work because I don't put any fuses".

Best Wishes
danielz85



Joined: 22 Sep 2012
Posts: 37

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PostPosted: Sun Jan 20, 2013 2:07 pm     Reply with quote
thanks for the answer Ttelmah,

I've tried the following and still no luck.
Am I configuring the device wrong?
Code:

#include <33FJ06GS202.h>
#fuses FRC
#use delay(clock=7.37M)

void main(void){
   SETUP_ADC_PORTS(NO_ANALOGS);
   setup_oscillator(OSC_INTERNAL | OSC_RC);
   set_tris_a(0x0);
   output_a(0xFF);
   set_tris_b(0x0);
   output_a(0xFF);
   while(1){
   
   }
}
Ttelmah



Joined: 11 Mar 2010
Posts: 19537

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PostPosted: Sun Jan 20, 2013 2:40 pm     Reply with quote
The problem is that quite a few of the fuses default to values that can/will cause problems on these later PIC's. Copy a basic setup from an example, and see if it starts.

Best Wishes
danielz85



Joined: 22 Sep 2012
Posts: 37

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PostPosted: Mon Jan 21, 2013 7:25 am     Reply with quote
Issue solved:

needed to set MCLR to Vdd...
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