TMS320F28379D: C28x led_ex2_sysconfig example hangs after a hardware reset

Hello,

I am testing the led_ex2_sysconfig example and have encountered some unexpected behavior. I would appreciate it if you could review the issue.

My Environment:

• CCS: v12.8.0

• C2000Ware: v5.05.00.00

• Board: LAUNCHXL-F28379D

• Project: C2000Ware_5_05_00_00\driverlib\f2837xd\examples\dual\led\led_ex2_sysconfig_cpu*

Configuration:

• The build configuration for both the CPU1 and CPU2 projects was set to FLASH.

• _LAUNCHXL_F28379D was added to the predefined symbols.

• The program was loaded directly onto the target via CCS.

Problem Description:

To begin, I am testing the CPU1 project standalone. To do this, I commented out the IPC_sync() line in main.c as shown below.

[Modified main.c]

// This is the code from the led_ex2_sysconfig_cpu* example with the IPC_sync line commented out.
#include "driverlib.h"
#include "device.h"
#include "board.h"

void main(void)
{
    Device_init();
    Device_initGPIO();
    Board_init();
    Interrupt_initModule();
    Interrupt_initVectorTable();

    // The original code would halt here, which is expected as CPU2 is not running.
    // IPC_sync(IPC_CPU1_L_CPU2_R, IPC_SYNC);

    EINT;
    ERTM;

    for(;;)
    {
        GPIO_writePin(DEVICE_GPIO_PIN_LED1, 0);
        DEVICE_DELAY_US(500000);
        GPIO_writePin(DEVICE_GPIO_PIN_LED1, 1);
        DEVICE_DELAY_US(500000);
    }
}

Observed Behavior:

1. When I build and run the CPU1 project with the debugger, the program correctly enters the for loop in main(), and the LED begins to blink as expected.

2. However, if I then press the hardware reset button on the board, the LED no longer blinks after the board resets.

3. It appears the program is halting somewhere during the boot process. Since this is triggered by a hardware reset, I am unable to use the debugger to determine where the code is getting stuck.

Additional Information:

• For comparison, I tested the led_ex1_blinky_cpu* (the non-SysConfig version) example under the exact same conditions. This project works perfectly, and the LED blinks correctly even after a hardware reset.

Could you please investigate this? It seems there might be a difference in the boot or initialization sequence in the SysConfig-based led_ex2 example that causes it to hang after a standalone reset.

Thank you for your support.