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Software Application Development Getting I2C up and running
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Getting I2C up and running

troy.cowan.123
troy.cowan.123 over 8 years ago

Hi. 

I'm trying to get the I2C functionality going in my application (running on a picozed).

As far as I can tell I've set up the PL correctly, enabling I2C 0 and connecting it to pins 50 and 51. In the PS, I'm using the iicps_v3_3 driver built into libxil.a. I'm calling the methods pretty much exactly as is done in the supplied example. When I attempt to send a couple of bytes out on the bus, nothing happens. I'm scoping the SCL and SDA lines, and they are not changing state at all. I never see the COMP bit or any error bit become active in the I2C registers. It's as though the I2C functionality is just inert or disabled. I'm stumped as far as how to troubleshoot this issue. Any help would be great, thanks!

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  • troy.cowan.123
    0 troy.cowan.123 over 8 years ago

    Yes, you described my setup correctly. The lines are both stuck logic low.

    Thanks,

    Troy

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  • troy.cowan.123
    0 troy.cowan.123 over 8 years ago in reply to troy.cowan.123

    Whoops, sorry: one line is held low (SCL), and the other is high (SDA).

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  • troy.cowan.123
    0 troy.cowan.123 over 8 years ago in reply to troy.cowan.123

    Whoops, sorry: one line is held low (SCL), and the other is high (SDA).

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