TMS320F280049C: Custom CAN Based Bootloader.

Pradeep choudhary

Part Number: TMS320F280049C
Other Parts Discussed in Thread: C2000WARE

Hi,

I am working with a product making use of TMS320F280049C and this is the very first time that I will be working with a C2000 microcontroller. I intend to make a CAN-based custom bootloader which will be used for updating the Main Application present in a separate area of the flash. So, I want to know what would be the best way to accomplish this task. The structure of the Bootloader app that I intend to develop is as follows-

1)Bootloader will reside at the start of the flash.(Starting from Starting address)

2)Application that needs to be updated will reside right after the ending address of Bootloader.

3)In case of update, Bootloader will receive data frames through CAN which it will write to the flash area and after writing entire application it will switch execution to the updated app and also will change Vector table offset address.

So,It would be really great if I get the rough idea of how to do it with this particular MCU.

Hoping for a quick response.

Regards,

Pradeep

over 5 years ago

0 Hareesh Janakiraman over 5 years ago

TI__Guru* 95315 points

Pradeep,

You might be better off dedicating a sector to the bootloader. Flash is erased one sector at a time. i.e. the smallest quantum of flash that can be erased is a sector. This way, you can erase/program all other sectors, but keep the boot sector undisturbed.

0 Pradeep choudhary over 5 years ago in reply to Hareesh Janakiraman

Intellectual 310 points

Hi Hareesh,

Thanks for responding. Can you please direct me to some example code or reference doc which can help me to get started with building a custom bootloader.

Regards,

Pradeep Choudhary

0 Hareesh Janakiraman over 5 years ago in reply to Pradeep choudhary

TI__Guru* 95315 points

Pradeep,

Here are a few helpful links to get you started:

https://e2e.ti.com/support/microcontrollers/c2000/f/171/t/801616?TMS320F28374D-Boot-Loader-Upgrade-from-flash-segment

https://e2e.ti.com/support/microcontrollers/c2000/f/171/t/939205?CCS-TMS320F28379D-

https://e2e.ti.com/support/microcontrollers/c2000/f/171/t/903018

Please search e2e, since there are numerous posts that deal with custom bootloaders. The above is just a small sample. You may also find this app.report useful: http://www.ti.com/lit/sprabv4. While it deals with SCI, the general idea is the same.

If you are new to C2000 or CCS, please review the workshops at https://training.ti.com/c2000-mcu-device-workshops. TI has invested considerable resources to develop these self-paced workshops and most questions can be answered by reviewing the workshop material for your specific device family or its closest equivalent. The workshops are an excellent introduction to the basics of C2000 MCUs and the process of writing and running your first example. Good introductory videos about CCS are available at https://www.youtube.com/user/CodeComposerStudio.

0 Hareesh Janakiraman over 5 years ago in reply to Hareesh Janakiraman

TI__Guru* 95315 points

Pradeep,

In C2000Ware, we have Flash kernels i.e. bootloaders for:

- SCI (F2802x, 03x, 05x, 07x, 37xS, 37xD, 004x)

- CAN (03x, 06x) - \device_support\f2806x\examples\c28\f28069_can_flash_kernel, \device_support\f2803x\examples\c28\f2803x_can_flash_kernel

- USB (37xD)

All of them are RAM based i.e. the ROM bootloader will allow the above bootloader to be downloaded into RAM (using a host Flash programmer utility – available for SCI and USB), and then the above bootloader can be used to download the application to Flash. The host Flash programmer utility is essentially a Host-to-C2000 data-transfer utility.

The F28004x also has a Flash based bootloader, which will be resident in 2 Flash sectors.

0 Pradeep choudhary over 5 years ago in reply to Hareesh Janakiraman

Intellectual 310 points

Hi Hareesh,

Thanks for your help.

You have mentioned that the F28004x also has a Flash-based bootloader, which will be resident in 2 Flash sectors. So, Is it available with C2000ware? If yes then where exactly?

Thanks and Regards,

Pradeep

0 Hareesh Janakiraman over 5 years ago in reply to Pradeep choudhary

TI__Guru* 95315 points

The one you are referring to is here (and it’s SCI based, not CAN): C:\ti\c2000\C2000Ware_3_03_00_00\driverlib\f28004x\examples\flash

0 Pradeep choudhary over 5 years ago in reply to Hareesh Janakiraman

Intellectual 310 points

Hi Hareesh,

Thanks for your help. I have successfully developed a custom CAN-based bootloader.

Regards,

Pradeep

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TMS320F280049C: Custom CAN Based Bootloader.