CCS/IWR6843ISK-ODS: Frame start signal

Hello

It will help if you can calcify the following for the experts:

1. Has the code running on the device been modified to bring the trigger signal out

2. What internal trigger are you tapping  from device/code to bring out to the external world

3. which external device pin have you brought the signal to

3. Is that signal available on one of the Connectors of TI EVM.

Thank you,

Vaibhav

Dear Vaibhav,

I would like to obtain Frame_Start signal from IWR6843ISK-ODS. The running project is "mmwave_sdk_68xx_hwa".

Here is the answer to your question.

1. Has the code running on the device been modified to bring the trigger signal out

2. What internal trigger are you tapping  from device/code to bring out to the external world

- The trigger setting have been modified as shown in the following figure.

3. which external device pin have you brought the signal to

4. Is that signal available on one of the Connectors of TI EVM.

- I do not use external device pin. I would like to obtain the frame start signal from IWR6843ISK directly.

For monitoring the Frame_Start signal, I measured N8 pin signal after setting the pin, but I did not get the frame_start signal.

Best regards.

Hello,

    Could you please confirm the radar is operational during this process. Scope need to be triggered for the Frame stat signal before the operation could start. 

Also were you able to get any other signals Chip start/end on the GIPO to ensure setup conditions are correct.

Thanks and regards,

CHETHAN KUMAR Y.B.

Dear CHETHAN ,

I confirmed the program using LED GPIO that the pin number is K13.

GPIO toggle is set before dpmTask start. So, I checked that the program is running.

I would like to obtain FRAME_START signal in the datasheet.

I set pin N8 to FRAME_START after the other Pin mux changes.

However, I did not get the FRAME_START.

Please let me know how can I obtain FRAME_START.

Best Regards.

Hello J. Soo,

   Thanks for the confirmation,

On the pin mux N8 ball, were you able to bring other control signal such as Chirp_start/Chirp_end signls or not? 

We need to ensure radar should be operational (i.e. it's emitting chirps) while these signals are muxed out.

Thanks regards,

CHETHAN KUMAR Y.B.

Dear CHETHAN,

Radar operation is confirmed by GUI.

Chirp_start, Chirp_end, and Frame_start signals are set on the pin mux N8 or P9, it doesn't work.

Is there any other setting parameter except Pinmux_Set_OverrideCtrl and pinmux_set_FuncSel functions ?

Best Regards.

Hello J. Soo,

   Thanks for the confirmation,  Could you please read the register 0xFFFFEA60 after writing it? 

This is to make sure that the configuration has been written correctly into register. IOMUX register space has lock mechanism, reading the register will ensure that there is no issue from programming side. 

Also we need to ensure, application is running, while probing the signal. 

Thanks and regards,

CHETHAN KUMAR Y.B.

Dear CHETHAN,

The register value while GUI is running is below;

Thanks

Best Regards.

Hello J. Soo,

   Wanted to understand, Do you want to control or monitor the frame start signal. Above pin mux based method is meant only to monitor the internal frame_start signal on an external pin for debug purpose. 

If you want to control the signals device with an Hardware pin then you may have to use hardware trigger option instead of software trigger options. 

You could refer to below E2E thread on the hardware trigger and constrained associated with hardware trigger. 

https://e2e.ti.com/support/sensors/f/1023/p/923329/3412468?tisearch=e2e-sitesearch&keymatch=hardware%2520trigger#3412468

https://e2e.ti.com/support/sensors/f/1023/p/948403/3507181?tisearch=e2e-sitesearch&keymatch=hardware%20trigger#3507181

Thanks and regards,

CHETHAN KUMAR Y.B.