IWR6843AOPEVM: Accessing Data and Control UART pins through the 60pin connector

Amirhossein Bayat

Part Number: IWR6843AOPEVM

Hi,

I want to access both Data and Control UARTs of IWR6843AOPEVM Revision G without using the micro USB. In the forum, it was mentioned that we can use the 'MSS_LOGGER' in the 60-pin connector to read data so I am guessing that is the TX pin of Data UART. Is there any documentation on all the RX/TX pins of both UARTs in the 60-pin connector?

Regards

over 2 years ago

0 Pedrhom Nafisi over 2 years ago

TI__Mastermind 23177 points

Hello,

Please give us more time to look into the documentation for you.

Best Regards,

Pedrhom

0 Tim Henderson over 2 years ago

TI__Expert 8802 points

Hi,

Please see the following E2E post: IWR6843AOPEVM: Connecting to a custom MCU using UART pins in 60-pin connector - Sensors forum - Sensors - TI E2E support forums

Regards,

Tim

0 Amirhossein Bayat over 2 years ago in reply to Tim Henderson

Prodigy 35 points

Hi,

I asked the question in the post you mentioned. The problem is that the response to that question only involves the MSS_LOGGER which is for the DATA UART. What I am asking is what pins are connected to the TX/RX of the control UART?

Regards,

Amirhossein

0 Tim Henderson over 2 years ago in reply to Amirhossein Bayat

TI__Expert 8802 points

Hi Amirhossein,

Sorry for the confusion. Please check out this thread: https://e2e.ti.com/support/sensors-group/sensors/f/sensors-forum/973509/iwr6843-reg-iwr6843-uart-pin-connection

The RS232 pins you see in the ICBOOST schematic from IWR6843AOPEVM: Connecting to a custom MCU using UART pins in 60-pin connector - Sensors forum - Sensors - TI E2E support forums should be the pins needed to configure the device.

Regards,

Tim

0 Amirhossein Bayat over 2 years ago in reply to Tim Henderson

Prodigy 35 points

Hi Tim,

Thank you for your response. I have been trying to work with the pins you mentioned. I have modified the demo program to work without receiving a config (using a hard-coded config). The switches have been configured as mentioned in the documentation to map the UART pins to the 60-pin connector. But the problem is that I do not receive anything on the MSS Logger or RS232 pins. Even when checking the pins with an oscilloscope, there is just a tiny voltage of around 0.2 v on the MSS Logger pin.

Regards,

Amirhossein

0 Amirhossein Bayat over 2 years ago in reply to Amirhossein Bayat

Prodigy 35 points

I wanted to note that I am powering the IWR6843AOPEVM module using the power only micro-USB. Is there any other pins in the 60-pin connector that should be connected to something in order for the MSS Logger pin to work?

0 Tim Henderson over 2 years ago in reply to Amirhossein Bayat

TI__Expert 8802 points

Hi,

I am unsure about other pins that may need to be connected - I can look into that. Can you provide a few more details about the setup such as how you're getting to the 60-pin connector? Are you using the ICBOOST module?

Regards,

Tim

+1 Amirhossein Bayat over 2 years ago in reply to Tim Henderson

Prodigy 35 points

Dear Tim,

I have fixed the problem. The problem was that based on "Table 4-2. Pin Mux Settings" in the documentation, I was setting S1.3 as ON as well. But, only S1.1 and S1.2 are related to MUXing the UART pins and S1.3 should be OFF so you can receive the data independently.

Regards,

Amirhossein