Difference between STM32CubeIDE and GDB

[DMoor.6]

I'm a newbie to STM32 programming, but have 25+ years in desktop development.

I've created a PCB with a STM32F042F6 mcu (based on a working design). I added pins for a SWD port and I have an LED connected to PortB1.

I've used STM32CudeIDE to create a simple program to blink the LED every 500mSec.

I've connected using the black_magic probe and can get the LED to blink in debug mode

Startup code for the debug configuration is

set mem inaccessible-by-default off
 target extended-remote /dev/ttyACM0
 monitor tpwr enable
 shell sleep 5
 monitor swdp_scan
 attach 1

Anyway this bit works.

My question is, how do I get this to work in the release mode. If I power cycle the target board the program does not restart automatically.

I also connected via GDB (without the STM32 IDE) and while I can connect and load the elf file, after "run" the GDB console remains unresponsive to further commands.

[DMoor.6]

The forum would not let me add a link, the design is based on https://github.com/omzlo/canzero-hardware

[DMoor.6]

The output from GDB (outside of STM32CudeIDE) is

(gdb) file ~/STM32CubeIDE/workspace_1.12.1/BlinkLED_STM32F042/Debug/BlinkLED_STM32F042.elf
A program is being debugged already.
Are you sure you want to change the file? (y or n) y
Reading symbols from ~/STM32CubeIDE/workspace_1.12.1/BlinkLED_STM32F042/Debug/BlinkLED_STM32F042.elf...
(gdb) load
Loading section .isr_vector, size 0xc0 lma 0x8000000
Loading section .text, size 0x1384 lma 0x80000c0
Loading section .rodata, size 0x30 lma 0x8001444
Loading section .init_array, size 0x4 lma 0x8001474
Loading section .fini_array, size 0x4 lma 0x8001478
Loading section .data, size 0xc lma 0x800147c
Start address 0x080003f4, load size 5256
Transfer rate: 14 KB/sec, 477 bytes/write.
(gdb) run
The program being debugged has been started already.
Start it from the beginning? (y or n) y
Starting program: /home/david/STM32CubeIDE/workspace_1.12.1/BlinkLED_STM32F042/Debug/BlinkLED_STM32F042.elf 

And the code that I added in main.c was

  /* Infinite loop */
  /* USER CODE BEGIN WHILE */
  while (1)
  {
    /* USER CODE END WHILE */
 
    /* USER CODE BEGIN 3 */
 
	  // flash the led every second
	  HAL_GPIO_TogglePin(GPIOB, GPIO_PIN_1);
	  HAL_Delay (500);   /* Insert delay 500 ms */
 
  }
  /* USER CODE END 3 */