TPS25750: Patching from host controller: patch bundle is not accepted and MODE remains PTCH instead of APP

Jan Van Bogaert

Prodigy 80 points

Part Number: TPS25750

Hi,

I am trying to transfer the patch file from a microcontroller.

The patch file is 32k bytes and is created by the TPS25750 Application Customization Tool.

Following the Technical reference manual, I follow the flow chart:

Read register INT_EVENT1 gives back all zero except byte 11: 02 - so this means ReadyForPatch
Read MODE register gives back PTCH
Write the DATA1 register: 0x09 0x06 0x00 0x7d 0x00 0x00 0x51 0x32 - 00 is the first byte and 7d is the second byte of the patch size (0x7d00 is 32k), 51 is the patch I2C address.
Write CMD1 register with PBMs: 0x08 0x04 0x50 0x42 0x4d 0x73
Read CMD1 gives back all zero
Read DATA1 gives back all zero
Write the patch bundle to address 0x51 in 250 chunks of 128 bytes, Each packet is acknowledged.
Write CMD1 register with PBMc: 0x08 0x04 0x50 0x42 0x4d 0x63
Read CMD1 register gives back all zero.
Read DATA1 register gives back: byte 0: 0x40 byte 1: 0x03, byte 5: 0x51 , byte 6: 0x32 - THIS IS NOK
Read MODE register gives back: PTCH - THIS SHOULD be APP

So the TPS25750 seems to have problems to accept the patch

As a last step I also read the BOOT register, this gives back 0x05 0x30 0x03 0x60 0x02 0xa1

Please help me to find the error.

over 1 year ago

0 Jan Van Bogaert over 1 year ago

Prodigy 80 points

{"questionnaire":{"version":"7.0.4.7","answers":[0,4,4,0,3,3,0,"B011",0,"3140",0,16.8,4.4,0.8,0.8],"options":{},"configID":"3140","vendorID":"B011"}}

0 Deepak Rozario over 1 year ago in reply to Jan Van Bogaert

TI__Expert 3190 points

I will look into this and get back to you.

0 Jan Van Bogaert over 1 year ago

Prodigy 80 points

Hello Deepak.

Thanks for looking into this. I hope for a quick resolution, my project is rather urgent.

Please also look at a similar problem https://e2e.ti.com/support/power-management-group/power-management/f/power-management-forum/1271184/tps25750-tps25750-patch---pbmc-not-changing-to-app/4841987#4841987 that is being investigated by Field Tolson.

0 Kevin Kosta over 1 year ago in reply to Jan Van Bogaert

TI__Genius 17905 points

Hi Jan,

Can you please tell me the timing difference between the last patch burst and the PBMC command?

Thank you,

Kevin

0 Jan Van Bogaert over 1 year ago in reply to Kevin Kosta

Prodigy 80 points

HI Kosta.

This is now set to 1ms.

I tried increasing to 100ms but this does not make any difference.

Jan

0 Kevin Kosta over 1 year ago in reply to Jan Van Bogaert

TI__Genius 17905 points

Hi Jan,

Thanks for the feedback here.

Typically we should wait about 10ms for the PBMC command.

But it doesn't seem like it is fixing the issue. I will look into the boot flags and return values and see if anything sticks out.

Do you have a Saleae of something that can capture the I2C traffic? An I2C log might be helpful here.

Thank you,

Kevin

0 Jan Van Bogaert over 1 year ago in reply to Kevin Kosta

Prodigy 80 points

OK, the Technical reference manual recommends 500us, but I guess that document is in urgent need of an update.

I have listed all I2C messages in the original request and I have verified that this is also what has been acknowledged, but I will see if I can get a capture of the traffic.

0 Kevin Kosta over 1 year ago in reply to Jan Van Bogaert

TI__Genius 17905 points

Hi Jan,

I will reach out to the team regarding the document!

And please let me know once you get the capture.

Thank you,

Kevin

+1 Jan Van Bogaert over 1 year ago in reply to Kevin Kosta

Prodigy 80 points

OK, some progress.

When I do the following, I get APP after loading the patch bundle.

1. I have added a delay of 10ms after reading DATA1 and before writing the patch bundle

2. I have used the "Low Region Binary" file instead of the "Full Flash Binary"

Although I now get "APP" when reading the mode register, I think the configuration is still not correctly loaded.

How can I verify the configuration?

Is it ok to use the Low Region instead of the Full flash file?

I have also a capture of the I2C trafficcapture_lowregion.xlsx

0 Kevin Kosta over 1 year ago in reply to Jan Van Bogaert

TI__Genius 17905 points

Hi Jan,

Good to hear that you are now in App mode!

The best way to see if your configuration was loaded is to get your EC to read back the PD firmware and registers that you have modified.

if the device boots up in app mode, then most likely, your config was indeed loaded properly.

Thank you,

Kevin

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TPS25750: Patching from host controller: patch bundle is not accepted and MODE remains PTCH instead of APP