TMS320C6678: Secondary bootloader code for C6678

VineyK

Part Number: TMS320C6678

Hi,

I'm looking to have a secondary boot loader image residing in the EEPROM. I would like to configure the initial boot as I2C, which would load the secondary boot loader image from the EEPROM into the reserved section of the L2 CorePac0. I'm planning to initialize a few peripherals, including EMIF16. I would like to have the application code residing in the NOR flash. The secondary boot loader code would copy the application code into the internal memory of the DSP through the initialized EMIF16 interface and then jump to _c_int00.

Does this sound feasible?

Appreciate your help.

Thanks,

Viney

over 8 years ago

0 Rahul Prabhu over 8 years ago

TI__Guru** 116180 points

Vinay,

We do provide a secondary bootloader for the C6678 EVM aas part of the Processor SDK RTOS software package for this device. It is referred to as IBL or intermeediate bootloader.

Please download Processor SDK RTOS for C6678 herE:
www.ti.com/.../PROCESSOR-SDK-C667X

The documentation for the secondary bootloader(IBL) is available herE:
processors.wiki.ti.com/.../Processor_SDK_RTOS_BOOT_C66x

What you are trying to do is feasible. The IBL already provides a similar example for EMIF16 NAND interface so you should be able to do the same with NOR. We don`t have a EMIF16 NOR interface on the EVM so there is no example for NOR in the software.

Regards,
Rahul

0 VineyK over 8 years ago in reply to Rahul Prabhu

Intellectual 370 points

Thanks Rahul for your prompt response.

So, it looks like I need to flash the IBL to the EEPROM and the application code to the NOR.

I couldn't find the source code for EMIF16 NAND interface example you mentioned. Could you point me to it?

Thanks,
Viney

0 VineyK over 8 years ago in reply to VineyK

Intellectual 370 points

Rahul,

Is there a sample Hello World image that I can write to the NOR flash to make sure the whole boot sequence works as expected?

Thanks,
Viney

0 Rahul Prabhu over 8 years ago in reply to VineyK

TI__Guru** 116180 points

Vinay,

As you know we have only NAND flash connected to C6678 EVM so the software that we provide only supports examples from EMIF NAND. However lot of user on the forums that have used this boot mode have archived the instructions. Here are some references:

HEre is an example EMIF16 NOR flash utility that we had used on one of the custom boards:

Hope this helps.

Regards,

Rahul

0 VineyK over 8 years ago in reply to Rahul Prabhu

Intellectual 370 points

Thanks a lot, Rahul.

I was wondering if you could point me to the EMIF16 NAND interface example code you mentioned.

Appreciate your help.

Thanks,
Viney

0 Rahul Prabhu over 8 years ago in reply to VineyK

TI__Guru** 116180 points

Vinay,

The EMIF NAND boot code is found in the IBL directory path

"pdk_c667x_x_x_x\packages\ti\boot\ibl\src\main"

"pdk_c667x_x_x_x\packages\ti\boot\ibl\src\nandboot"

"pdk_c667x_x_x_x\packages\ti\boot\ibl\src\hw\nands\emif25"

Regards,

Rahul

0 VineyK over 8 years ago in reply to Rahul Prabhu

Intellectual 370 points

Got it, Rahul.

Do I have to make more changes than what's already there to get it working?

Thanks,
Viney

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TMS320C6678: Secondary bootloader code for C6678