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Help with GPIO output

Question asked by PhilipJ on Mar 15, 2016
Latest reply on Mar 17, 2016 by DaveThib

Hi,

can anyone offer some explanation of the signal value required to control a GPIO pin as an output? Should it be 5:23 or 28:0 format?

I have the following to "tell" a control CPU when the sigmaDSP is ready and running it's program:

but the timer output goes low at power up and then high after 1 second, I want it to stay high and go low after one second, with a pull-up so the CPU isn't confused by a non-programmed DSP.

I tried everything I could think of to invert the timer output but all my attempts left the pin as a permanent low or a permanent high.

 

Much appreciated

PhilipJ

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