Custom AXI4 Lite I2C checking

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

Top Replies

Parents

0 embeddedguy 14 hours ago

Is there any example for AXI I2C ? I want to try that too.
Cancel
Vote Up 0 Vote Down

Sign in to reply

Verify Answer

Cancel
0 iksevas 13 hours ago in reply to embeddedguy

All you have to do is add the AXI I2C to your block design in Vivado (mapped to the I2C interface that you are targeting). Import the design XSA into Vitis and create a new platform based on the XSA. Then navigate in Vitis to the drivers that get created based on your XSA within the BSP. Find the AXI I2C driver and look all the way to the right in the driver window. You will see an option to IMPORT EXAMPLE designs. Pick the example design with best fits your targeted application. Hope this helps.
Cancel
Vote Up 0 Vote Down

Sign in to reply

Verify Answer

Cancel
0 MATRIX7878 9 hours ago in reply to iksevas

I am using my I2C protocol so I can take advantage of the PL and PS combo and it is a great way (for me) to learn and see first-hand how the communication works. I tested the IIC AXI for the onboard temp sensor and it works, but when I use my AXI4 I made, I see my lines are stuck low or just sending noise. My variable in my C file is 0x00. As it is I2C, I would expect a line of 0xFF if the bus failed. I do not think I am communicating from the PL to the PS correctly.
Cancel
Vote Up 0 Vote Down

Sign in to reply

Verify Answer

Cancel

Reply

0 MATRIX7878 9 hours ago in reply to iksevas

I am using my I2C protocol so I can take advantage of the PL and PS combo and it is a great way (for me) to learn and see first-hand how the communication works. I tested the IIC AXI for the onboard temp sensor and it works, but when I use my AXI4 I made, I see my lines are stuck low or just sending noise. My variable in my C file is 0x00. As it is I2C, I would expect a line of 0xFF if the bus failed. I do not think I am communicating from the PL to the PS correctly.
Cancel
Vote Up 0 Vote Down

Sign in to reply

Verify Answer

Cancel

Children

No Data