AWR2243BOOST: I2C Communication

Brandon Heavey

Part Number: AWR2243BOOST
Other Parts Discussed in Thread: AWR2243

I'm attempting to demonstrate the ability to communicate with the AWR2243 over I2C on the AWR2243BOOST board.

I have all 3 SOP jumpers installed on the board for I2C mode. When I power up, the HOST IRQ line goes high. I then attempt to write the CNYS sequence to cause the IRQ line to drop, but have been unsuccessful thus far in this action.

One thing I haven't found documented is which register should be used to write the CNYS pattern. I'm using 0x28 for the I2C address, but a register value is also required for I2C writes. I've been using 0x00, but perhaps that is incorrect and why I'm not seeing the IRQ line drop after my write.

Any guidance on proving out initial I2C communication would be appreciated.

Thanks.

over 3 years ago

0 Ishita Kochar over 3 years ago

TI__Mastermind 31680 points

Hello Brandon,

Thanks for reaching us out on TI E2E forums. Please find some similar threads answered by our experts linked below which provide guidance on establishing I2C communication :

https://e2e.ti.com/support/sensors-group/sensors/f/sensors-forum/989029/awr2243-sop-mode-for-loading-from-spi-then-communicating-via-i2c

https://e2e.ti.com/support/sensors-group/sensors/f/sensors-forum/1028818/awr2243-awr2243-not-working-in-i2c-functional-mode-sop7/

https://e2e.ti.com/support/sensors-group/sensors/f/sensors-forum/1032451/awr2243-question-about-sop-7-i2c-mode-of-operation

https://e2e.ti.com/support/sensors-group/sensors/f/sensors-forum/1028818/awr2243-awr2243-not-working-in-i2c-functional-mode-sop7

Hope this helps you get started. Let us know if you need any further assistance.

Regards,

Ishita

0 Brandon Heavey over 3 years ago in reply to Ishita Kochar

Prodigy 60 points

Thank you for the links. I had previously reviewed them. A bit more about what I'm trying to accomplish...

Eventually, I want to update the mmwavelink_singlechip_example.exe with custom callbacks that work for my host processor. But, as a first step, I'm trying to prove I can communicate with the AWR2243 over I2C.

My setup:

AWR2243BOOST board
0 Ohm resistors installed on board for R197 & R198
SOP[2..0] = 111 (all jumpers installed)
SDA and SCL on J5 connected to host processor I2C bus

To remove as many variables as possible, I'm attempting to simply send the CNYS pattern to the board via the u-boot I2C command to trigger the AWR2243 to drop the host irq line. Here's a screenshot of the actions taken in u-boot

From the screenshot, you can see the AWR2243 is active, listed in the probe output address list (0x28). The next action is attempting to send the CNYS pattern. However, after sending, nothing happens on the host irq line.

My questions:

1) Are any messages required to be sent prior to the CNYS pattern in order for it to drop the host irq line?

2) I'm writing to register 0x00 at address 0x28, is that correct? I couldn't find any documentation on which register to write.

Thanks.

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AWR2243BOOST: I2C Communication