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Custom AXI4 Lite I2C checking

MATRIX7878

Hello,

       I have been working on a custom AXI4 Lite I2C core for the ZuBoard 1CG on board temp sensor.  The best I can do is read back a value of 0x00 for the WHO_AM_I register.  It should be 0xA0.  Since Xilinx's AXI4 IP creator is broken, I have created a custom AXI4 protocol.  I need help understanding what the problem with my design is.  I do not know if it is with my VHDL, or my C.  Everything in my C executes, so it seems like the hardware I built does not have errors in it, it just does not work.  The VHDL is 2019 version: MATRIX7878/AXI4-I2C: A simple I2C for AXI4.  I have confirmed the sensor works by using the Avnet IIC temp sensor AXI4.

Thank you

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    Have you simulated your design ?

    If not, then simulate and get the simulation working.

    As a general rule, a design might not work in hardware even if the simulation works, but it will never work in hardware if the simulation fails.

    Once the sim is working, if the hardware doesn't work then add test features or use Viavado probing tools to find out where it goes wrong.

    Test the axi interface and get that working first - then get into the I2C stuff.

    Are you using VHDL or Verillog ?

    MK

  • 0 in reply to michaelkellett

    I normally do simulate, but I do not know how to simulate AXI with the PS.  I looked at the AXI VIP, but do not know SystemVerilog and cannot find a good tutorial for custom IP blocks.  I have tried an ILA before, but it never runs after I program the board in Vitis.  Is there a more thorough guide out there that I haven't found despite searching all over the internet?  I use VHDL as that is what I was trained in and prefer anyways to Verilog.

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  • 0 in reply to michaelkellett

    I normally do simulate, but I do not know how to simulate AXI with the PS.  I looked at the AXI VIP, but do not know SystemVerilog and cannot find a good tutorial for custom IP blocks.  I have tried an ILA before, but it never runs after I program the board in Vitis.  Is there a more thorough guide out there that I haven't found despite searching all over the internet?  I use VHDL as that is what I was trained in and prefer anyways to Verilog.

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