MSP430FR and TI-RTOS

julien1986

Intellectual 385 points

Other Parts Discussed in Thread: MSP430FR5969, SYSBIOS

Hi,

I'have started to work on the MSP-EXP430FR85969 with the TI-RTOS and I am worry about the memory SRAM.

I have started with an Code composer example the empty(minimal) project:

At now my code is very light, I only have

two task (The stack sizes are about 256Bytes)
Three interrupts(I have reduced the interrupt stack at 450 Bytes)
4 semaphore
The UART and GPIO driver are enabled. I also have to add the I2C driver and maybe the SPI....
The log user are enabled but I have put it in the FRAM

I have modified the linker file like this to put a lot in the FRAM

    .bss        : {} > FRAM                   /* GLOBAL & STATIC VARS              */
    .data       : {} > FRAM                 /* GLOBAL & STATIC VARS              */
    .stack      : {} > RAM (HIGH)         /* SOFTWARE SYSTEM STACK             */
    .cinit      : {} > FRAM

Only the stack are in the FRAM. My system doesn't need to be fast but the consumption has to be low so I don't think it is great idea to put it on the FRAM...

With this project I ever have a ram usage about 1900Bytes(The ram size is only 2K)

What do you think about put the stack in the FRAM? Have you got any advices to save space in the SRAM?

Is it really possible to make a project with MSP430FR5969 and TI-RTOS?

Thank for your help

over 9 years ago

0 judahvang over 9 years ago

TI__Mastermind 32475 points

What version of SYSBIOS, CCS are you using?

0 julien1986 over 9 years ago in reply to judahvang

Intellectual 385 points

I am using the TI-RTOS 2_10_01_38 ansd the bios version is bios_6_41_00_26

0 judahvang over 9 years ago in reply to julien1986

TI__Mastermind 32475 points

There is a known issue with the default linker command file for MSP430FR5969. See this thread:

https://e2e.ti.com/support/embedded/tirtos/f/355/p/414387/1471711#1471711

As far as putting your stack into FRAM. That should be fine. FRAM is ultra low power and ultra-fast write.

Judah

0 julien1986 over 9 years ago in reply to judahvang

Intellectual 385 points

Thanks for the thread but I have ever seen this bug and I fixed it.

Since I started the project I though that my RAM was almost full. I thought that because when I start the debug mode. I have this message :

The message said " expected RAM usage is 2150 or the RAM size on the MSP430FR5969 is 2kB."

But if you look the .map file, you can see that only 0x100 byte are used by the RAM....

I think there are mistake on this message ?

0 judahvang over 9 years ago in reply to julien1986

TI__Mastermind 32475 points

Where is this message coming from?

0 julien1986 over 9 years ago in reply to judahvang

Intellectual 385 points

This message comes from the console. It appears when I start the debug mode.

0 judahvang over 9 years ago in reply to julien1986

TI__Mastermind 32475 points

My question is...from what code is that message being printed? I assume some target code is calling some print function which is sending this to the console output.

0 julien1986 over 9 years ago in reply to judahvang

Intellectual 385 points

I'am sorry but I have searched this message in source file but I don't found anything.
I have tried with the file search in my project. No result

0 judahvang over 9 years ago in reply to julien1986

TI__Mastermind 32475 points

I'm not aware of any message like this in TIRTOS. Must be coming from some other libraries. I don't know how this is estimating your RAM usage either.

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