TMS320F280023: CAN ROM Bootloader Assistance

Ezra Krause

Part Number: TMS320F280023

I want to boot from either flash or CAN.

To achieve that, I have:

1. Written 0x5AFFFF2E to Z1-OTP-BOOTPIN-CONFIG (0x00078000C), which assigns GPIO46 as my only boot pin.

2. Written 0xFFFF2203 to Z1-OTP-BOOTDEF-LOW (0x0007801E), which assigns CANTX as GPIO32 and CANRX as GPIO33 & Flash sector 0x00080000 to the boot table.

When I switch my boot pin LOW, I get the expected result. The micro jumps to flash.

When I switch the boot pin to high, I get no CAN interaction from the micro.

I am sending the start bytes 0x08AA @100Kb and receive no response. I have tried changing the CAN dlc from 2 to 8. I have tried changing the endianness etc.

Note that my circuit and CAN bus communication is verified.

Can anyone help me out with some tips or direction? I am most likely just missing something.

Any assistance would be appreciated.

Regards

Ezra

7 months ago

0 Ezra Krause 7 months ago

Prodigy 60 points

It might even be related to Andreas' question? https://e2e.ti.com/support/microcontrollers/c2000-microcontrollers-group/c2000/f/c2000-microcontrollers-forum/1201977/tms320f280023-problem-with-setting-alternate-can-bootloader-pin-otp

0 Charles Roberson 7 months ago in reply to Ezra Krause

TI__Genius 9380 points

Hi Ezra,

What are you using to send the keyvalue (0x08AA) to the device and the DLC code? Are you using a modification of the DCAN Flash Host programmer?

GPIO4/5 are used in the host programmer and CAN Flash Kernel for transferring bytes (for other devices).

Thanks and regards,

Charles

0 Ezra Krause 7 months ago in reply to Charles Roberson

Prodigy 60 points

Hi Charles,

I am using a CAN analyzer and its proprietary software to send 0x08AA manually. After I have verified that I am in the CAN bootloader, will I start working on the software to do the actual boot loading.

When you say the flash Kernal makes use of the GPIO4/5 by default, that means that I would have to update the flash kernal first to be compatible with my boot table?

On a different note:

I've seen from other boot loading tools that the boot loader echoes back any valid command that is received. Is this correct?

0 Ezra Krause 7 months ago in reply to Ezra Krause

Prodigy 60 points

Here's the 0x08AA message:

0 Charles Roberson 7 months ago in reply to Ezra Krause

TI__Genius 9380 points

Hi Ezra,

Yes, once you are able to confirm the bootloader for CAN, if you use a modified version of the CAN Flash Kernel project you will have to edit for which GPIOs your project uses, if you wish to stick with GPIO32/GPIO33.

For bootloader echo, I would refer to look at the bootROM files for the device and the device TRM for the specific bootloader used.

Thanks,

Charles

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TMS320F280023: CAN ROM Bootloader Assistance