TMS320F280049C: Converting SCI Bootloader to CAN Bootloader

Hi Skyler,

Thank you very much for your support.
I will follow the points you mentioned.

First, I will configure the CAN communication and try to implement SCI data reception in the bootloader.

If I have any doubts during the process, I’ll reach out to you and attach my project file here.

Thanks and regards,
Nibesh

Hi Skyler Baumer 

Could you please review the CAN-based bootloader code that I am currently developing?
I faced little bit challenging on Read and Write Blocking.
Could you kindly review it and provide your feedback?

I hope to hear from you soon.

Thanks and Regards,
Nibesh




4540.CAN_flashapi_ex2_sci_kernel2_V1.zip

Hi Nibesh,

I can take a look at this over the next few days. In the meantime, can you please provide some more context on the behavior you are seeing? Where are you getting stuck?

Kind regards,

Skyler

Hi Skyler,

I hope you're doing well.

I wanted to clarify something regarding the usage of SCI_readCharBlockingNonFIFO and SCI_writeCharBlockingNonFIFO. As you know, these functions are used to send 1 byte of data over the SCI protocol in a blocking, non-FIFO mode.

I have implemented a similar configuration for CAN. Also I have changed the BOOT Mode and other various functions in it. However, I have some doubts about how the blocking non-FIFO behavior translates in the context of CAN, based on my current implementation.

Could you kindly review my approach and provide your feedback?

Thanks and regards,
Nibesh

Hello Skyler Baumer 

Have you got time to review my code?
If you can spend some time of yours, that will be good for me Skyler.


Thanks and Regards,
Nibesh 

Part Number: TMS320F280049C

Tool/software:

Hello Team,

I am currently working with the SCI kernel code (flashapi_ex2_sci_kernel) for the F28004x series. I am in the process of converting the communication interface from SCI to CAN.

So far, I have removed the Auto Baud functionality and commented out the section that gets user commands via the console:
command = sciGetPacket(&length, data);

I have also modified other SCI-related data transmission code to use CAN instead.

Could you please review the code and let me know if there are any mistakes or areas for improvement?

Looking forward to your feedback.

Thanks and Regards,
Nibesh

CAN_flashapi_ex2_sci_kernel2_V2.zip

Hi Nibesh,

Is there any specific question/problem you are having?

Thanks,

Charles

Hi Charles,

I’m currently facing an issue with converting SCI to CAN. At the moment, I don’t have any other specific problems.

I’ll reach out again if I encounter any further issues.

Thanks and regards,
Nibesh

Hi Nibesh,

If you are having issues converting the SCI kernel to a CAN kernel, have you referenced one of our existing CAN Flash kernels? They are listed in the CAN Flash Programming of C2000 Microcontrollers app note.

Thanks and regards,

Charles

Hi Nibesh,

Apologies for the delay, I have taken a quick look at the code but can you provide some more detail on the behavior you are seeing? You mentioned that you have some questions about the non-FIFO behavior, but what behavior are you seeing when you try and interact with this code over CAN?

Kind regards,
Skyler

Hi Skyler,

No worries.

Actually, I am trying to simulate the same working method of SCI using CAN. However, I’m noticing that it’s not working as expected.

My main concern is to replicate the exact working methodology that SCI follows just replacing SCI with CAN.

I hope you can provide some guidance or suggestions to make this work.

Looking forward to hearing from you soon.

Thanks and regards,
Nibesh

Hi Charles,

I have already reviewed the datasheet a long back which you have attached.
However, the example code provided is for a different controller, which I don’t have. I’m working with the F280049C.

I have tested SCI bootloading successfully on this controller, and it’s working fine for me. Now, I’m trying to replicate the same bootloading process using CAN, but it’s not working as expected.

Could you please help me with this issue?

Thanks and Regards,
Nibesh

Hi Nibesh,

After looking through your provided example, it is recommended that you use the functions provided for DCAN initialization and follow a similar example given for the F28003x device (C2000Ware_6_00_00_00\driverlib\f28003x\examples\flashflash_ex5_dcan_flash_kernel).

At the beginning of your example, you initialize the device and GPIOs, but then should follow the DCAN_Boot() function flow, found here:

C2000Ware_6_00_00_00\libraries\boot_rom\f28004x\revB\rom_sources\F28004x_ROM\bootROM\source\DCAN_Boot.c

Thanks,

Charles

Hello Charles,

I wanted to clarify that the F28004x series does not support DCAN.

I have implemented the solution based on your suggestion. however, I am still encountering issues. Could you please take a look at the code and help identify the problem?

Thank you for your assistance.

Regards,
Nibesh Khulal


CAN Bootloader.zip

Hi Nibesh,

As previously stated, the problem resides in needing to use the DCAN_BOOT function for the F28004x device, which can be found in the bootROM source files for the device, as well as in similar example for the F28003x Flash DCAN Kernel. This device has DCAN support as specified by the device datasheet and technical reference manual.  

I have read through your code, and it is better to use the F28003x flash_kernel_ex5_dcan_flash_kernel project as a porting basis for this device.

Thanks and regards,

Charles

Thanks, Charles.

I will check and try to port it.
If I run into any issues, I’ll post them here.

Regards,
Nibesh

Hi Charles,

I was looking at the DCAN_Boot.c source file inside the BootROM source folder.
I have a doubt: is this the main file?
Even after adding the supporting libraries, it's still giving compilation errors.

What could be the issue?
Do we need to map the memory manually?

Hi Nibesh,

This is a main support file for the ROM bootloader, but for your project it should not be used solely as the main file but as a reference. If we look at the flash_kernel_ex5_dcan_flash_kernel project, you can see this file is included as a part of the project's build, but the main source file used is called flash_kernel_ex5_dcan_flash_kernel.c . Can you give an image of the compilation errors?

The memory mapping should be handled by the linker command file for the project and may need to be modified as well.

Thanks and regards,

Charles

Hello Charles,

I have attached my code and images for your reference.
Could you please review them and provide any necessary updates?

With Regards,
Nibesh





 




1682.CAN_01_09_2025.zip

Hello Charles,

Did you got time to review my code.
I hope to hear from you soon.

Thanks and Regard,
Nibesh

Hi Nibesh,

Apologies for the delay, our expert is currently out of office and should have a response early next week.

Best,

Alex

Hi Nibesh,

From first import and rebuilding of the project, it gives the following error for "_bankSelect" symbol being undefined:

As well, in the code I am seeing quite a few lines that use the "Escape point for OTP patches". This functionality should primarily be used by the bootROM source and should not be added to your CAN Flash Kernel.

I advise that the source for this project model something closer to the F28003x Flash DCAN Kernel example in terms of structure.

Thanks and regards,

Charles