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Using SDI pin as GPIO with 16f88

 
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widdly



Joined: 04 Jun 2015
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Using SDI pin as GPIO with 16f88
PostPosted: Thu Jun 04, 2015 7:41 pm     Reply with quote
I am working on a design using a PIC 16f88 to control a MCP4822 DAC via the hardware SPI. The SPI is working properly and I can send data to the DAC.

However, since I am only outputting SPI data, I would like to use the SDI pin as a digital input connected to a mechanical switch. I am not sure if/how I can do this.

The SPI transactions occur periodically inside the timer0 ISR. I would like to read the input pin in the main loop.
PCM programmer



Joined: 06 Sep 2003
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PostPosted: Thu Jun 04, 2015 8:17 pm     Reply with quote
See this thread:
http://www.ccsinfo.com/forum/viewtopic.php?t=45914
widdly



Joined: 04 Jun 2015
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PostPosted: Thu Jun 04, 2015 9:27 pm     Reply with quote
Thanks PCM programmer. I'll give it a try tonight.
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