ARM Technical Support Knowledge Articles

GPIO PIN OUTPUT

Applies to: uVision Debugger

Answer


Information in this article applies to:

All Products, All Versions


SYMPTOM

I want to view the output of a peripheral on Port 0, Pin 7.  When I set the Logic Analyzer watch P0.7, I don't see anything.

CAUSE

P0 is not the simulator's representation of the physical port 0 pins.  P0 is the device's internal register for GPIO port 0.

RESOLUTION

To watch the actual state of the pin, you need to set the Logic Analyzer to view the Virtual Target Register "PORT0".

Watching PORT0.7 clearly shows the signal you expect.

STATUS

Works as advertised

MORE INFORMATION

Article last edited on: 2006-11-15 09:18:47

Rate this article

[Bad]
|
|
[Good]
Disagree? Move your mouse over the bar and click

Did you find this article helpful? Yes No

How can we improve this article?

Link to this article
Copyright © 2011 ARM Limited. All rights reserved. External (Open), Non-Confidential