LAUNCHXL-F280039C: F28003x Bootloader to App Jump Issue

Tool/software:

Hi TI Experts,

I’m working on a F28003x bootloader and an App1. Here’s my setup:

 What I’ve Done So Far

• Bootloader is located at 0x80000.

• App1 is built to be located starting at 0x88000.

• Bootloader receives .bin data via CAN and writes it to flash starting at 0x88000.

• After writing, I compute and verify the CRC32 of the .bin — it matches, confirming the data was flashed correctly.

Issue

I try to jump from the bootloader to the App1 entry point (_c_int00) using the address from the App1 .map (0x000896BA), but I get an illegal interrupt handler.

Here’s the code I’m using for the jump:

#define APP1_ENTRY_ADDR  0x000896BAUL  // From App1 .map (_c_int00)

void jump_to_application(void)
{
    DEVICE_DELAY_US(100);

    CPUTimer_stopTimer(CPUTIMER0_BASE);
    CPUTimer_reloadTimerCounter(CPUTIMER0_BASE);
    CPUTimer_setEmulationMode(CPUTIMER0_BASE, CPUTIMER_EMULATIONMODE_STOPAFTERNEXTDECREMENT);

    DINT;
    IER = 0x0000;
    IFR = 0x0000;

    asm(" NOP"); asm(" NOP"); asm(" NOP"); asm(" NOP");
    DEVICE_DELAY_US(5000);

    void (*app_entry)(void) = (void (*)(void))APP1_ENTRY_ADDR;

    app_entry();

    // Never returns
}

What I’m Confused About

• The .map is generated for the .out, which has symbols like _c_int00.

• However, I’m downloading only the .bin (raw data) into flash at 0x88000. So:

  • Should I be jumping to the _c_int00 address from the .map?

  • Do I need to locate .codestart or any other entry point instead?

• What’s the correct method for jumping from a bootloader to an app built for F28003x when using .bin files?

 What I’m Seeking

• Clarification on how the .map vs .bin addresses relate.

• Advice on the right entry point for a .bin-based App1.

• Is my jumping method correct, or do I need to adjust it (e.g., setting SP, using .codestart)?

Thank you in advance!

If needed, I can also attach the .cmd files and .map files for both projects.