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SPI pin configure as an interrupt in pic24fj1024

 
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Shivam



Joined: 01 Oct 2022
Posts: 1

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SPI pin configure as an interrupt in pic24fj1024
PostPosted: Sat Oct 01, 2022 6:11 am     Reply with quote

I have used SPI in bit-bang mode but now suppose I want to do it as an interrupt configuration then can anyone assist me to get an example code for read and write operation...
Ttelmah



Joined: 11 Mar 2010
Posts: 19328

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PostPosted: Sat Oct 01, 2022 10:50 am     Reply with quote

What you are asking does not make sense.

SPI is a master slave bus. For bit banged, the PIC will always be the master,
so initiates and generates the clock for all transactions. There is nothing
for an interrupt to do. Unless the slave is sending a trigger to say 'I want
you to talk to me', in which case, just have an interrupt handler for the
signal that is connected to this trigger, that then just does the bit banged
SPI. Nothing changes about the SPI transaction itself.
If you want to implement a slave, then this can't (normally) be bit banged.
The hardware really needs to be used, otherwise you cannot guarantee the
timings (except at slow rates).
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