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Altera_Forum's avatar
Altera_Forum
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14 years ago

Modelsim to look at i2c data

I want to view the i2c data being sent to the DE2 boards audio CODEC. I have a few files that have been generated from SOPC builder eg slow clock, i2c controller, audio config. I tried just ge...
Altera_Forum's avatar
Altera_Forum
Icon for Honored Contributor rankHonored Contributor
14 years ago

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I already have the program performing an i2c write (to initialise the codec) and it all works fine on the de2 board. What would be the best way then to view the serial i2c data?

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To view the I2C data on the hardware, you can read the I2C parallel data register. Of course, if that's not working, you might want to look at the serial data stream, and in that case, you can use the SignalTap II logic analyzer (it gets embedded inside the FPGA).

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Can i just generate the ack by drawing in the waveform?

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It depends what you want out of your simulation. If I was simply interested in checking that an I2C controller worked, then a simple ACK would work fine. However, if you are trying to check a more complex communication sequence with an I2C device, then you need a model of the CODEC. I think in your case, just using SignalTap would be sufficient for you to see what is going on.

Cheers,

Dave