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BMP - Black Magic Probe support

The black magic probe is an SWD/JTAG debugging adapter in a small USB formfactor. It shows itself as a serial device that talks the gdbserver protocol directly, as such you do not need any additional software like OpenOCD to use it.

It additionally provides another serial port conneted to a uart on the device. This is commonly used for SWO support.

Automatic SWO support for this is on the very long todo list

bmp list

This will go through all known serial ports and checks if one of them looks like a black magic probe gdbserver port

alttext

bmp attach

This tries to be as smart as possible and connect to the probe and setting up vdb by

  • Connecting to the first found probe as an extended target
  • Asking the probe to scan for the first attached MCU
  • When using bmp/s it will also try to match an SVD file to the detected MCU and load files

Note: On certain linux distributions you may run into permission issues for the port. Depending on how this works in the distro your user must be in the right group or a udev rule for the bmp must be created

Configuration

  • vdb-bmp-scan-retries retry this often to scan for an MCU before giving up
  • vdb-bmp-retry-delay wait that much seconds between retries to give whatever you scan for time to wake up
  • vdb-bmp-all-mem-accessible Normally the bmp does tell gdb that all but the flash and ram are inaccessbile. For SoCs this would block access to peripheral and memory mapped things