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IMXRT1060 example execution fails in release, but ok in debug

Question asked by Camille Louapre on Oct 15, 2019
Latest reply on Oct 23, 2019 by jeremyzhou

Hello everyone,

I am facing a problem using MIMXRT1060-EVK, which contains an MIMXRT1062DVL6A.
I am trying to execute a simple example: SDK_PATH/boards/evkmimxrt1060/demo_apps/led_blinky
I use GCC (gcc-arm-none-eabi-8-2018-q4-major) as toolchain, and SDK_2.6.2_EVK-MIMXRT1060_for_gcc as SDK.

When I use provided ./armgcc/, it builds fine, and I am able to flash it on EVK at adress 0x60000000 using a Segger JLink base probe, and it runs fine.

We already have a makefile compilation system, so I would like to use it, and to avoid using MUXpresso IDE or other external tool.

I am able to build the example, building the same files, linking the same (flags extracted from CMake previous compilation), both in release and debug.


When I launch the debug or release binary with the debugger (using MCUXpresso - just for debug), it works, the led blinks.
When I flash the release binary, using the Segger tool (not using MCUxpresso debug session), nothing happens, it does not work, even after a reset.


I am not familiar with NXP chip, but I have a good background in ST ones, and so in Cortex M chips.


I seems that the debugger does something needed by the release binary, but I don't know what.

  • I tried several things:
  •  flashing at different adress (0x00000000)
  • playing with boot modes
  • using my own linker files - used for ST Cortex M4 chips (adapted for imx chip addresses)
  • using exactly the same cflags/asmflasg/ldflags as the cmake example
  • reduce built files to a minimum needed (with minor changes to enable build):
    • boards/evkmimxrt1060/demo_apps/led_blinky/board.c
    • boards/evkmimxrt1060/demo_apps/led_blinky/clock_config.c
    • boards/evkmimxrt1060/demo_apps/led_blinky/pin_mux.c
    • boards/evkmimxrt1060/demo_apps/led_blinky/led_blinky.c
    • devices/MIMXRT1062/drivers/fsl_gpio.c
    • devices/MIMXRT1062/drivers/fsl_clock.c
    • devices/MIMXRT1062/system_MIMXRT1062.c
  • using the same flags I used for building M4 chips (adapted flags regarding M core)


In each case, the debug session runs fine, but flashing release binary with segger tool does not.

I am a bit lost...


Attached flags I am currently using (which I use with success on other Cortex M projects)

I am currently using MIMXRT1062xxxxx_flexspi_nor.ld as linker file (as MIMXRT1062xxxxx_ram.ld does not work in any case, even building using provided cmake scripts)


Help appreciated !