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Altera_Forum's avatar
Altera_Forum
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17 years ago

Cyclone 3 I2C

Hi, I had a question about I2C on the Cyclone III. I have a design that uses some constants I would like to be able to change from a PC in real time. Is it possible to issue commands over the...
Altera_Forum's avatar
Altera_Forum
Icon for Honored Contributor rankHonored Contributor
17 years ago

hi andrew,

how will you be interfacing I2C to your PC?

can you switch your design to use a UART rather than I2C? most computers have a serial port or can have one with a cheap USB interface. you could then issue commands from a serial terminal on your PC to your CIII.

on the FPGA you could use a UART core or you could use NIOS and include a UART. if you use a UART core you'll need to write some HDL to interpret the incoming data, if you use NIOS you could write C to do the same thing.