RTOS/TDA2PXEVM: Dependency on UART console connection for system boot

Hrishikesh Rajurkar

Expert 1165 points

Part Number: TDA2PXEVM
Other Parts Discussed in Thread: SYSBIOS

Tool/software: TI-RTOS

Hello All,

We have customized board based on TDA2Px with sysbios all configuration.

We have enabled iss_capture_isp_simcop_display to run by default when system is powered ON, it is working fine.

In one of use case , client wants to run the system when no UART console connection are present.

But when we tested this scenario, the code hangs and booting process does not move further unless UART cable is connected. I could trace to SBLLibPrintfs present in the file sbl_tda2xx_main.c which in turn using the UART AP UARTCharPut() "which is a blocking call which Waits indefinitely until the THR and Transmitter Shift Registers are empty " as per description in file uart.c in ../ ti_components/drivers/pdk_01_09_00_17/packages/ti/csl/src/ip/uart/V1/priv

However for prints from application which uses Vps_printf does not experience this issue . (I disconnected uart once sbl process is complete, it worked fine)

Please let me know if my understanding is correct and how to resolve this issue.

regards

Hrishikesh

over 6 years ago

0 Rishabh Garg over 6 years ago

TI__Guru 55685 points

Hi Hrishikesh,

When the Print API is register using SBLLibInit, you can make print function as NULL.
Code change is "sblInitPrms.printFxn = NULL".

Regards,
Rishabh

0 Hrishikesh Rajurkar over 6 years ago in reply to Rishabh Garg

Expert 1165 points

Thanks Rishabh for replying , we actually need print also as in another use case we have integrated ddr stress test with SBL . Is there any way to make uart puts non blocking
Regards
Hrishikesh

0 Rishabh Garg over 6 years ago in reply to Hrishikesh Rajurkar

TI__Guru 55685 points

Hi Hrishikesh,

My suggestion is to make change in SBL application instead of changing UART CSL driver.
You can define a macro to control the function registration depending upon the use case and you can set the macro in SBL Config.

Regards,
Rishabh

0 Rishabh Garg over 6 years ago in reply to Rishabh Garg

TI__Guru 55685 points

Hi Hrishikesh,

Is there an update on this issue?

Regards,
Rishabh

0 Hrishikesh Rajurkar over 6 years ago in reply to Rishabh Garg

Expert 1165 points

Hi Rishabh

Thanks for your support we could resolve this issue.

You can close this thread. Sorry for replying late as i was not in the office

regards

Hrishikesh

0 Rishabh Garg over 6 years ago in reply to Hrishikesh Rajurkar

TI__Guru 55685 points

Hi Hrishikesh,

Thanks for the update.
Please mark the posts that helped you to resolve the issue as "This resolved my issue".

Regards,
Rishabh

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RTOS/TDA2PXEVM: Dependency on UART console connection for system boot