FOTA for Msp430f2274

ANUP Sharma41

Other Parts Discussed in Thread: MSP430F2274

Hi,

I am using msp430f2274 along with a GSM module for my project. I wanted to implement over the air upgrade. For that i have read various application note by TI. All the application notes states that i need to erase my previous code and then copy the new code into the flash. I have a doubt, as i wanted to try something else for this. I wanted that in the BSL, I will change the location of the code execution and keeping my previous code safe to. i.e i will keep 2 codes in my memory location. one will be default code and the other one will be the downloaded code. As my default code address is made to execute at boot-up, but i want to change that to my downloaded code without erasing the complete flash. so can we do such thing in the BSL? if no then it there any alternative to achieve this scenario? Please provide you feedback for this.

over 10 years ago

0 Katie Pier over 10 years ago

TI__Guru* 83691 points

Hi Anup,

Have you seen this application note called MSPBoot? I think it would be helpful for what you are trying to do. I think what you are wanting is something called "Dual Image Mode" in this app note.
www.ti.com/.../slaa600
www.ti.com/.../slaa600

Regards,
Katie

0 ANUP Sharma41 over 10 years ago in reply to Katie Pier

Intellectual 350 points

Thanks for the help katie, i will go through this document and reply accordingly.

0 ANUP Sharma41 over 10 years ago in reply to ANUP Sharma41

Intellectual 350 points

Hi,

I have implemented this scheme without using the BSL. I have made a application which is going to run and take the code using the uart and store that code inside the memory location(flash). I am giving my hex file into ti. and copying everything as it is. after storing the exact data, i am using the instruction
__asm(" BR #40960");
in order to jump to that location and start executing the code from there....
But after executing the code my device restarts itself. I have checked with debugger my flash has the same content as in my hex file.but still its is restarting. Is this correct way to copy the hex file or do i need to change the architecture for this?

0 Evan W over 10 years ago in reply to ANUP Sharma41

TI__Mastermind 41650 points

Anup,

I think this should be an okay way to do this for now. Can you give me more information about your memory map that you have created for your program?

Please include the sections that you intend to store code, where you have your code that you use to store the code into the memory and your reset vectors for your host/flasher application and your application code?

0 ANUP Sharma41 over 10 years ago in reply to Evan W

Intellectual 350 points

thanks for the reply evan,

i am following the slaa600A application note and doing everything in the same manner. so i changed my memory map and now it is working fine.

but i am not able understand the boot.c file in the code. why do we need that file. and whats happening inside?.

0 Evan W over 10 years ago in reply to ANUP Sharma41

TI__Mastermind 41650 points

Anup,

Thanks for the patience. The boot.c is used to initialize the MSP430 C runtime environment by allocating the memory for the system stack, which will be sized by the linker, initializes the reset vector, and includes other macros for the stack pointer and global variables.

0 ANUP Sharma41 over 10 years ago in reply to Evan W

Intellectual 350 points

Thanks for replying Evan,
my question is that why do we need this in this ota? as i have never used it in any other program.
in case of normal programs, how do we initialize the stack pointer and global variables? I just wanted to understand the difference between two programs and there initialization ?

0 Evan W over 10 years ago in reply to ANUP Sharma41

TI__Mastermind 41650 points

Anup,

The boot.c file is normally a part of the rtslib (run time support library) that is built when you install the compiler/CCS. You can find the source code buried somewhere in your CCS install. This boot.c is overriding that one I believe. I can double check this for you though.

0 Evan W over 10 years ago in reply to ANUP Sharma41

TI__Mastermind 41650 points

Anup,

Just confirmed this. The boot file is typically at ~\ccsv6\tools\compiler\<version>\lib\src in CCS.

When you add the file to your project, it overrides the original from the lib.

0 ANUP Sharma41 over 10 years ago in reply to Evan W

Intellectual 350 points

hi Evan ,

thanks for the help.

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FOTA for Msp430f2274