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PIC24 PORTB issue.

 
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0xDEADBEEF



Joined: 24 Jan 2007
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PIC24 PORTB issue.
PostPosted: Tue Mar 04, 2008 11:01 am     Reply with quote
Sample code:
Code:
fprintf(COMCON, "\rA:%2x\tB:%2x\tC:%2x\tD:%2x\tE:%2x\tFB:%2x\tG:%2x\t", input_A(), input_B(), input_C(), input_D(), input_E(), input_F(), input_G());



1. The input function only returns an 8-bit number (yes, even if I change the printf formatting to %4x) instead of the full 16-bit value... i can work around that though.

2. All the ports are working except PORTB (well I haven't actually checked PORTC, but I'm not using it so I don't care).


No matter what, PORTB always reads as all zeroes.

Chip is a PIC24HJ256GP610 compilier is version 4.064

Any ideas?
0xDEADBEEF



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Posts: 8

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PostPosted: Tue Mar 04, 2008 11:52 am     Reply with quote
UPDATE:

PortB works when I'm running in DEBUG mode through the MPLab ICD2 programmer.

So, apparently this is a compilier issue of some sort. The question is... how do i fix it?


MPlab version is 8.00
Guest_7068
Guest
PostPosted: Thu Mar 06, 2008 7:19 pm     Reply with quote
Try using the printf with %LX parameter.

Use the following to shut down the A/D module which is multiplexed on port B.
Code:
SETUP_ADC_PORTS(NO_ANALOGS);
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