Error while flashing GPIO_EXTI program on STM32F746ZG board

[DV.3]

Not able to flash GPIO_EXTI program on STM32F746ZG board using CubeIDE tool

Source code : https://github.com/STMicroelectronics/STM32CubeF7/tree/master/Projects/STM32F746ZG-Nucleo/Examples/GPIO/GPIO_EXTI

Environment : Ubuntu 18.04.4 LTS

Cube IDE : STM32CubeIDE Version: 1.3.1 Build: 6291_20200406_0752 (UTC)

CubeMX : STM32CubeMX - STM32 Device Configuration Tool Version: 5.6.1-RC1 Build: 20200405-2303 (UTC)

ST Link Version : V2J36M26

Log Status :

/home/default/STM32Cube/Repository/STM32Cube_FW_F7_V1.16.0/Projects/STM32F746ZG-Nucleo/Examples/GPIO/GPIO_EXTI/SW4STM32/STM32746ZG_Nucleo/Debug/st-link_gdbserver_log.txt

[0.000] initConfigParams(): Configuration flags start

[0.000] initConfigParams():  external-init         false

[0.000] initConfigParams():  pend-halt-timeout       (null)

[0.000] initConfigParams():  halt              false

[0.000] initConfigParams():  config-file          ""

[0.000] initConfigParams():  persistent           false

[0.000] initConfigParams(): +log-file            "/home/default/STM32Cube/Repository/STM32Cube_FW_F7_V1.16.0/Projects/STM32F746ZG-Nucleo/Examples/GPIO/GPIO_EXTI/SW4STM32/STM32746ZG_Nucleo/Debug/st-link_gdbserver_log.txt"

[0.000] initConfigParams(): +log-level           31

[0.000] initConfigParams(): +port-number          61234

[0.000] initConfigParams(): +verbose            true

[0.000] initConfigParams():  refresh-delay         15

[0.000] initConfigParams(): +verify             true

[0.000] initConfigParams(): +swd              true

[0.000] initConfigParams():  swo-port            61234

[0.000] initConfigParams():  cpu-clock           8000000

[0.000] initConfigParams():  swo-clock-div         128

[0.000] initConfigParams():  initialize-reset        false

[0.000] initConfigParams():  debuggers           false

[0.000] initConfigParams():  serial-number         ""

[0.000] initConfigParams(): +apid              0

[0.000] initConfigParams(): +attach             true

[0.000] initConfigParams():  shared             false

[0.000] initConfigParams():  erase-all           false

[0.000] initConfigParams():  memory-map           ""

[0.000] initConfigParams():  ext-memory-loaders       false

[0.000] initConfigParams():  extload            ""

[0.000] initConfigParams(): +stm32cubeprogrammer-path    "/opt/st/stm32cubeide_1.3.0/plugins/com.st.stm32cube.ide.mcu.externaltools.cubeprogrammer.linux64_1.3.0.202002181050/tools/bin"

[0.000] initConfigParams():  temp-path           ""

[0.000] initConfigParams():  preserve-temps         false

[0.000] initConfigParams():  frequency           -1

[0.000] initConfigParams():  licenses            false

[0.000] initConfigParams():  ignore-rest          false

[0.000] initConfigParams():  version            false

[0.000] initConfigParams():  help              false

[0.000] initConfigParams(): Configuration flags end

[0.000] init(): STMicroelectronics ST-LINK GDB server. Version 5.5.0

Copyright (c) 2019, STMicroelectronics. All rights reserved.

[0.003] Device_Initialise(): Target connection mode: Attach

[0.007] reset_hw_wtchpt_module(): Hardware watchpoint supported by the target 

[0.010] Device_Initialise(): COM frequency = 4000 kHz

[0.010] Device_Initialise(): ST-LINK Firmware version : V2J36M26

[0.010] Device_Initialise(): Device ID: 0x449

[0.010] Device_Initialise(): PC: 0x0

[0.010] Device_GetStatus(): ST-LINK device status: RUN_MODE

[0.011] Device_Initialise(): ST-LINK detects target voltage = 3.25 V

[0.011] Device_Initialise(): ST-LINK device status: RUN_MODE

[0.011] initServerContext(): ST-LINK device initialization OK

[0.011] WaitConnection(): Waiting for connection on port 61234...

[2.028] WaitConnection(): Accepted connection on port 61234...

[2.029] haltOnConnect(): Try halt...

[11.718] haltOnConnect(): Halt timeout (0s) exceeded.

Exception Details : Error in final launch sequence:

Failed to execute MI command:

target remote localhost:61234

Error message from debugger back end:

Remote communication error. Target disconnected.: Connection reset by peer.

Failed to execute MI command:

target remote localhost:61234

Error message from debugger back end:

Remote communication error. Target disconnected.: Connection reset by peer.

Remote communication error. Target disconnected.: Connection reset by peer.

[mattias norlander]

Same issue if you try some other example projects?

From logs it seems as if your debug config is using "Reset Behavior Type = None".

GDB-server seem to fail to halt the core. This can happen if the core has already gone to sleep or similar, but the example you are referring to is just GPIO_EXTI. I dont think it uses sleep modes.

Anyway, try changing to "Connect under reset". I also assume you have not modified any pin configuration and by mistake mapped the PA13/14 to some AF? That would mess with the debug connection especially when using attach...