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GFros2's avatar
GFros2
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5 years ago

I am trying to use the I2C_slave to Avalon Intel IP. Does anyone know what clock speed it requires? Plus is there a simple explanation of the address interface?

The I2C interface hangs depending on the clock speed. I am using 0, 4, 8 etc address boundries to write 4 bytes to the part. Tends to work most of the time but fails some of the time. I.e. pretty us...
GFros2's avatar
GFros2
Icon for New Contributor rankNew Contributor
5 years ago

I tried a slow clock speed of about 10MHz as I thought the interface was only working at 100KHz. My clock is derived from an HDMI receiver - 130MHz when connected but 40MHz with no video. I have to cope with both.

The real problem with the module is trying to understand how it works. The bytes are all mixed up, address and data, on the avalon side. If the lower two bits of one? of the address bytes is non zereo the part gets locked up and I have to reload the whole design. All I need is an I2C receiver that has a main and sub address along with 16 bits of data to configure various sections of my picture scalar.

Geoffrey