MSPM0G3107:

saraswati pimple

Prodigy 50 points

Part Number: MSPM0G3107

Tool/software:

how to write main() into bootloder, i want custom bootloader

5 months ago

0 Sal Ye 5 months ago

TI__Mastermind 24485 points

Hi Saras,

I can't understand your description here. Could you give more details, thanks.

B.R.

Sal

0 saraswati pimple 5 months ago in reply to Sal Ye

Prodigy 50 points

I am working on FOTA without bootloader. I write an Application1 code at 0x0000000. This application1 receive data over UART and write into flash at 0x00002000(which is my application2). Now I want to jump from app1 to app2. what are the steps required.

0 saraswati pimple 5 months ago in reply to saraswati pimple

Prodigy 50 points

MEMORY

{

FLASH (RX) : origin = 0x00000000, length = 0x00020000

SRAM (RWX) : origin = 0x20200000, length = 0x00008000

BCR_CONFIG (R) : origin = 0x41C00000, length = 0x000000FF

BSL_CONFIG (R) : origin = 0x41C00100, length = 0x00000080

}

SECTIONS

{

.intvecs: > 0x00000000

.text : palign(8) {} > FLASH

.const : palign(8) {} > FLASH

.cinit : palign(8) {} > FLASH

.pinit : palign(8) {} > FLASH

.rodata : palign(8) {} > FLASH

.ARM.exidx : palign(8) {} > FLASH

.init_array : palign(8) {} > FLASH

.binit : palign(8) {} > FLASH

.TI.ramfunc : load = FLASH, palign(8), run=SRAM, table(BINIT)

.vtable : > SRAM

.args : > SRAM

.data : > SRAM

.bss : > SRAM

.sysmem : > SRAM

.stack : > SRAM (HIGH)

.BCRConfig : {} > BCR_CONFIG

.BSLConfig : {} > BSL_CONFIG

}

this is my cmd

0 saraswati pimple 5 months ago in reply to saraswati pimple

Prodigy 50 points

for jumping I am using following code

uint32_t newAppStackPointer = *((uint32_t *)(MAIN_BASE_ADDRESS));

uint32_t newAppResetHandler = *((uint32_t *)(MAIN_BASE_ADDRESS + 4));

NVIC_DisableIRQ(UART0_INT_IRQn);

// Disable interrupts

__disable_irq();

// Set Main Stack Pointer (MSP) to the new app's value

__set_MSP(newAppStackPointer);

// Optional: Deinitialize peripherals, disable SysTick, disable interrupts, etc.

// Jump to the new app's Reset Handler

AppEntryFunction appEntry = (AppEntryFunction)newAppResetHandler;

appEntry();

0 Sal Ye 5 months ago in reply to saraswati pimple

TI__Mastermind 24485 points

Hi Sarawati,

See the recommendation in our SDK example code:

static void start_app(uint32_t *vector_table)
{
    /* The following code resets the SP to the value specified in the
     * provided vector table, and then the Reset Handler is invoked.
     *
     * Per ARM Cortex specification:
     *
     *           ARM Cortex VTOR
     *
     *
     *   Offset             Vector
     *
     * 0x00000000  ++++++++++++++++++++++++++
     *             |    Initial SP value    |
     * 0x00000004  ++++++++++++++++++++++++++
     *             |         Reset          |
     * 0x00000008  ++++++++++++++++++++++++++
     *             |          NMI           |
     *             ++++++++++++++++++++++++++
     *             |           .            |
     *             |           .            |
     *             |           .            |
     *
     * */

    /* Reset the SP with the value stored at vector_table[0] */
    __asm volatile(
        "LDR R3,[%[vectab],#0x0] \n"
        "MOV SP, R3       \n" ::[vectab] "r"(vector_table));

    /* Set the Reset Vector to the new vector table (Will be reset to 0x000) */
    SCB->VTOR = (uint32_t) vector_table;

    /* Jump to the Reset Handler address at vector_table[1] */

    ((void (*)(void))(*(vector_table + 1)))();
}

Link: https://dev.ti.com/tirex/explore/node?node=A__ACTHfq7Nnk5GvMBsiZuiIw__MSPM0-SDK__a3PaaoK__LATEST&placeholder=true

B.R.

Sal

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