How to debug Nucleo H7A3 with Olimex ARM-USB-OCD-H

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    I’m trying to see if I can debug a STM Nucelo-H7A3 with an Olimex ARM-USB-OCD-H debugger.  I’m have the debugger connected to the Nucelo with the Olimex ARM-JTAG-SWD and ARM-JTAG-20-10 as shown in the “Using Olimex ARM-JTAG-SWD …” tutorial.  And I’ve set up a simple project for the Nucleo board as described in that tutorial.   I get the error  below when I try to download and debug and the same error when I test the connection during project setup.  I’ve been trying to get some help from Olimex but it looks like they don’t have anymore suggestions to offer.  I’m hoping there’s an easy answer before I have to invest in the significantly more expensive Segger debugger.


    C:\Users\gene\AppData\Local\VisualGDB\EmbeddedDebugPackages\com.sysprogs.arm.openocd\bin\openocd.exe -c “gdb_port 50582” -c “telnet_port 50580” -f interface/ftdi/olimex-arm-usb-ocd-h.cfg -f transport/olimex-arm-jtag-swd.cfg -c “transport select swd” -c “adapter speed 3000” -f target/stm32h7x_dual_bank.cfg -c init -c “reset init” -c “echo VisualGDB_OpenOCD_Ready”
    Open On-Chip Debugger 0.11.0 (2021-06-25) []
    Licensed under GNU GPL v2
    libusb1 09e75e98b4d9ea7909e8837b7a3f00dda4589dc3
    For bug reports, read
    Info : FTDI SWD mode enabled
    Warn : Transport “swd” was already selected
    adapter speed: 3000 kHz

    Info : clock speed 1800 kHz
    Error: Error connecting DP: cannot read IDR



    Sorry, this is not something VisualGDB directly controls. All we can suggest is to try contacting the board manufacturer or the debug probe manufacturer.

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