TM4C129XNCZAD: TM4C1292

mhd francois

Part Number: TM4C129XNCZAD

hi,

I can't flash the TM4C129XNCZAD after using #pragma CODE_SECTION(".fastRAM") for UART ISR?

any help?

/* Section allocation in memory */

SECTIONS
{
    .intvecs:   > INTERNAL_FLASH_START_ADDR
    .text   :   > FLASH
    .const :   > FLASH
    .cinit :   > FLASH
    .pinit :   > FLASH
    .init_array : > FLASH

    .vtable :   > INTERNAL_RAM_START_ADDR
    .data   :   > SRAM
    .bss    :   > SRAM
    .sysmem :   > SRAM
    .stack :   > SRAM
    .fastRAM :   > SRAM
}

over 1 year ago

0 Charles Tsai over 1 year ago

TI__Guru**** 191466 points

Hi,

I have asked questions and commented on your same question in this post. https://e2e.ti.com/support/microcontrollers/arm-based-microcontrollers-group/arm-based-microcontrollers/f/arm-based-microcontrollers-forum/1276391/tm4c129xnczad-tm4c129xnczad. It is better we use one post for discussion on the same topic. I will close this thread. For sure your linker file is insufficient to realize running code from SRAM. As I mentioned in the other post as well the linker user's guide has explained, you don't just allocate .fastRAM: > SRAM. This is not enough. The debugger is not going to program your .flashRAM code to RAM. It is not that simple. This is why I asked you to look at the Load and Run address description in the user's guide. You must also copy the code from the Load address to the Run address. That copy routine must be performed by your application, not the debugger programmer. Please refer to the other posts for my comments.

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TM4C129XNCZAD: TM4C1292