TMS320F28388D: firmware update

HS FAE Germany

Part Number: TMS320F28388D

Hello,
customer wants to program a firmware updater.

They choose flash boot using default boot pins. The F28x boot their primary bootloader and branch to 0x0008 0000 as predefined. Then they would like to place a custom 2nd bootloader which will check if data receives by UART otherwise start the application. So if no data is incoming they will branch to another sector in flash where by application code sits. 2nd bootloader should be placed in sector 0 and application in sector 4.

For evaluation he tried 2 projects programmed into flash memory. The first one turn led on gpio 31 and after some time make it off and will branch to the starting address of second software where led on gpio34 is blinked continuously. He mapped linker cmd from flash 0-3 for SW1 and flash sector 4-9 for SW2. Both was separate projects, build and written with flash option changed to ‘erase only necessary sectors’.

The opcode of both software can be seen in the locations after programming. They use asm( “LB 0x00088000”) function to branch to 2nd SW. The problem is after successful completion of 1st SW the 2nd SW is not starting.

Is this procedure ok?
Is it ok to branch to the starting address of the main? Or how to use asm( “LB 0x ......”) function?

Regards, Holger

over 4 years ago

0 Krishna Allam over 4 years ago

TI__Expert 7985 points

Hi Holger,

The procedure you described looks right and should work fine. Can you please confirm that both SW1 and SW2 are on the same CPU. This may not be the issue but the syntax for the asm instruction may not be right. It should be asm(" LB 0x00088000"). Note that the space is after the open quote (" LB...). But as I said this may have nothing to do with the problem because if you tried to compile with the syntax you have, the compiler will generate an error.

You said you can see SW2 in its respective location. From CCS, can you set the PC to the SW2 start address (0x00088000) and single step and run from there? Does that work ok?

Let me know and we can continue to debug further.

Regards,
Krishna

0 HS FAE Germany over 4 years ago in reply to Krishna Allam

TI__Mastermind 32400 points

Hello Krishna,
they were successful now. Can they realize the firmware updater through Ethernet? How can they update CPU1, CPU2 and CM flash in best way? Do we have an example?

Further question: Can the CPU1, CPU2 and CM be reseted independently? This is needed after firmware update of CPU1, CPU2 an CM flash.

Regards, Holger

0 Krishna Allam over 4 years ago in reply to HS FAE Germany

TI__Expert 7985 points

Hi Holger,

We do not support Ethernet based firmware update. In regards to reset, please refer to Section 3.3 Resets of the TRM here: https://www.ti.com/lit/pdf/spruii0c/

Thanks,

Krishna

0 HS FAE Germany over 4 years ago in reply to Krishna Allam

TI__Mastermind 32400 points

yes, I know but customer can write own firmware updater (2nd boot loader) through Ethernet, right?

Regards, Holger

0 Vivek Singh over 4 years ago in reply to HS FAE Germany

TI__Guru** 115841 points

Holger,

Customer can use Ethernet as secondary bootloader but please note that that Ethernet is only accessible from CM and not from CPU1/CPU2. So customer need to boot CM and then pass the data via IPC to CPU1.

Regards,

Vivek Singh

0 Krishna Allam over 4 years ago

TI__Expert 7985 points

Hi Holger, Do you have any additional questions on this topic? Regards, Krishna

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TMS320F28388D: firmware update