AM2431: Same boot mode setting for development and in system operation - QSPI boot mode and loading image

Peter Hanger1

Part Number: AM2431
Other Parts Discussed in Thread: UNIFLASH

Tool/software:

Hello,

we would like to have one boot mode setting that apply to the needs when developing and debug the application and when we later mount the device in our system.

We have been using UART and QSPI boot mode on the evaluation board.
UART boot mode to be able to write the image to flash and then switch to QSPI to start the loaded image.

We have also used the development boot mode to bypass the flash. But that boot mode can not be used when mounting the board in the system.

Since we need the QSPI boot mode when mounting the board in our system the question would rather be:

How to update flash with a new image via jtag or how to load an image into memory via jtag during development, when QSPI boot mode is selected?

Many thanks,

Peter

over 1 year ago

0 Kier over 1 year ago

Mastermind 9850 points

I think you can connect by JTAG at any time even with QSPI boot mode selected. Then you can replace the program by debugger.

Peter Hanger1 said:
How to update flash with a new image via jtag

I use UniFlash as per the following: https://software-dl.ti.com/mcu-plus-sdk/esd/AM263PX/latest/exports/docs/api_guide_am263px/TI_UNIFLASH_TOOL.html

It only mentions DEVBOOT and UART boot modes but I find this works for QSPI (1S) mode too. Although I'm using the onboard XDS110 debugger I see no reason why it wouldn't work with any debugger.

0 Karan Saxena over 1 year ago in reply to Kier

TI__Guru* 78165 points

Peter

FWIU the question is to be able to flash, debug, develop all with just having QSPI boot mode - please confirm.

If so, then there are multiple ways to handle this:

Kier said:
I think you can connect by JTAG at any time even with QSPI boot mode selected. Then you can replace the program by debugger.

1. What Kier mentioned - connect a JTAG, reset the device and load your application. The only caveat here is that you may have already started running the application from flash and the application you load from JTAG may need to do some additional "cleanup". For example, reset the flash, on board peripherals etc.

2. Change bootmode in SW - Refer this https://github.com/TexasInstruments/Beyond-SDK/tree/main/am64x/examples/switch_boot_mode. Essentially you need to write a few CTRL MMR registers and issue a soft reset to the SoC to be able to change bootmodes.

Regards

Karan

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AM2431: Same boot mode setting for development and in system operation - QSPI boot mode and loading image