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Re: Percent power I/O pin
Posted: Tue Jan 25, 2011 9:55 am
by jokes304
I tried using the manual initialization, but it still only works for the 8 channels as it did before. The only thing that I can think of is it may have been when i first was learning i made a GPIO program and may have used those pins and set them to GPIO, but I don't think that should have effected it now. If so is there a way to reset them so they are not GPIO? And an other thing I noticed is that these pins are always on unless the board has no power. Even when I hold the reset button on the developers board they remain on.
Re: Percent power I/O pin
Posted: Tue Jan 25, 2011 3:42 pm
by lgitlitz
Exactly which development board are you using and exactly which pins are you having issues on? Did you look at the schematic for the dev-board to see if those pins are connected to anything? For example I think some of the eTPU pins are connected to the dip-switch on the Dev-70. This means if the dip switch is in the on position then the pin will be ties to 3.3V, in the off position there is a 1K pull-down. The Dev-100 has the dip-switch routed through the CPLD so there is no issue there. Review the schematic of your hardware and make sure there are no conflicting signals. You can damage the processor by driving an output low when it is externally tied to VCC since the pin's output driver will have to dissipate all the power in the short circuit.