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dsPIC30F some outputs not switching

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Ben_Dinsdale

Joined: 05 Dec 2011
Posts: 1
Location: East Yorkshire, UK

dsPIC30F some outputs not switching

Posted: Mon Dec 05, 2011 9:59 am

Hello,

I'm currently debugging a prototype siren based around the dsPIC30F5011. I'm using CCS C v4.057, MPLAB v8.63, and ICD3 as the debugger.
I'm having trouble getting RD2 and RD3 to switch on.
These pins can also be compare pins which I have turned off.

Code:

SETUP_COMPARE(3, COMPARE_OFF);
SETUP_COMPARE(4, COMPARE_OFF);

and configured as outputs

Code:

SET_TRIS_D(0b0000011100100001);

I'm currently at the very simple do the inputs and outputs work stage.

Code:

while(TRUE) // never ending loop
{ // start of never ending while loop
delay_ms(20);
get_inputs(); // read in positive and negative inputs
if (input1)output_high(PIN_D3);
else output_low(PIN_D3);
}

This is code is working on pins D1, D4-D8, but not on D2 and D3 as I can see PORTD and LATD being switched in the watch window.
However in the case of D2 and D3 I only see LATD being switched whilst PORTD remains 0.
Any help or suggestions would be greatly appreciated.

Thanks

Ben

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