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TMS320F28335: Serial Flash programmer without hardware boot mode

Part Number: TMS320F28335


Can i use Serial Flash programmer without hardware boot mode?

I download f28335_flash_kernel to the  microcontroller, after that i call command 

=serial_flash_programmer=.exe  -d f2833x -k f28335_flash_kernel.txt -a test.txt -p COM5 -b 9600 -v

and i  get

Kernel AutoBaud Successful
aa

befor this action i commented #define kernel

  • Ivan,

    Can you elaborate on your question? Are you asking if you can avoid using the SCI Boot mode? The SCI Boot mode invokes the SCI ROM Bootloader which runs and facilitates downloading an "image" to RAM - which would be the Flash kernel. Then the Flash kernel would help download and program the application to Flash.

    Is your question about whether you can just use Flash boot mode?

    Thanks,

    Sira

  • I want make software sci boot mode. Without using pin mode for SCI, like in this table.

  • Ivan,

    If you use the SCI Boot mode, it will invoke the SCI ROM bootloader, and you will be able to download an image via SCI to RAM.

    If you don't use the SCI Boot mode, but instead want to use "software sci boot mode", essentially what you will do is boot in Flash boot mode, then in Software branch to a routine that allows firmware to be downloaded via SCI, but without invoking the SCI ROM bootloader. In other words, you will need our SCI Flash Kernel functionality available in Flash itself (unlike the SCI Boot mode case where you just download the SCI Flash kernel to RAM only during the Firmware update). 

    How exactly you do this is really implementation specific. I think customers do this differently. For example, once you boot in Flash boot, the entry point can be into a function in the custom bootloader (Flash kernel). Here, it can test a GPIO pin to check if a Firmware update needs to be done. Alternately, it can wait for a short time period to see if the host sends a Firmware update command. If either of these occurs, it can run the firmware update. Otherwise, it can branch to the entry point of the application, typically where a branch to the C initialization routine (_c_int00) occurs and from where main() of the application is called.

    Thanks,

    Sira

  • How can I use the firmware kernel driver in my application? I loaded into RAM and throw JTAG  the Flash Kernel example after calling the command

    serial_flash_programmer.exe  -d f2833x -k f28335_flash_kernel.txt -a Example_28335_flash.txt -p COM5 -b 19200 -v

    and i get

    C2000 Serial Firmware Upgrader
    Copyright (c) 2013 Texas Instruments Incorporated.  All rights reserved.
    
    getting comm state
    building comm DCB
    adjusting port settings
    
    calling f05_DownloadImage
    Downloading Example_28335_flash.txt to device...
    
    Kernel AutoBaud Successful
    aa

  • I am not clear on what happened. Did it not work? It should first download the kernel to RAM. Did that go through? The print indicates it tried to download the App. But did the kernel download occur?

    Thanks,

    Sira

  • If i make hardware SCI bootloader mode serial_flash_programmer work correctly. But if i download Flash Kernel example through debug mode, serial_flash_programmer give out

    C2000 Serial Firmware Upgrader
    Copyright (c) 2013 Texas Instruments Incorporated.  All rights reserved.
    
    getting comm state
    building comm DCB
    adjusting port settings
    
    calling f05_DownloadImage
    Downloading Example_28335_flash.txt to device...
    
    Kernel AutoBaud Successful
    aa

  • If you download the kernel through JTAG, and you halt the code, can you check where execution is at? Is it where it needs to be? I can take a look at the kernel code tomorrow to give you a better idea.

    Thanks,

    Sira

  • Program stops here

  • This is quite puzzling, I don't know why this is happening. In debug mode, when you download the Flash kernel via JTAG, what hardware mode is the board set to? I am not sure if it matters or not, but it would be good to know - maybe switch it and see if it makes a difference.

    Thanks,

    Sira

  • I used the F boot mode. The E boot mode work without downloading the Flash kernel via JTAG.

  • I am consulting with team members, I'll get back to you.

  • Ivan, can you please send me the application .txt file you are using. I would like to try this out. Please also send the corresponding .map file if you have it.

  • Ivan, never mind I modified the LED example to run from Flash.

  • It .txt and .map file with flash example + toggle led . I can programm this by hardware bootloading with kernel example, but i cant download this after programming kernel example via jtag.

  • 
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    00 00 
    

  • I cant insert here .map file. Link to the gdrive with .map file  drive.google.com/.../view

  • Are you using the F28335 ControlCARD? Can you send me a picture of your setup - I want to see how you are connecting the Serial cable.

    In the case where you are downloading kernel using CCS/JTAG, you have both the JTAG cable as well as the serial cable connected?

    Thanks,

    Sira