Also, I advise anyone searching for debugging tools to choose wisely. For example, if you need a simple tool, I think OpenOCDmight not be the best choice for you! Default debuggers embedded into evaluation boards (like STM32, EFM32, and otherMCUfamilies) by silicon vendors

This error could be caused by using libusb driver in windows while new versions of OpenOCD use WinUSB driver.You must also tell OpenOCD more information about your adapter (interface). For example, you need to specify the VID/PID, serial number, or the number of the channel you will use for FT2232H, since it has two channels.

D5 - DSR or data set ready pin. Like DTR, this is another optional pin for flow control in RS-232 serial connections. Here is the printout from the tutorial you suggested. Again, thank you for exploring this issue for me. It took me some time to understandhow to make OpenOCD work and flash my MCU, and I hope this tutorial will be a good and complete reference.First connect your FT232H board to the machine and follow the Zadig tool steps here to enable the libusb-based driver for the FT232H board.

The FT232H I have seems to be unable to supply its information when using FTD2XX drivers, hence my original post to understand how I might correct this. Learn how to make flashing your ARM-based MCU easy by using OpenOCD debugger with an FT2232H adapter. Connect TDI to SWDIO via a suitable series resistor (220-470 Ohm or so depending on the drive capability of the target and adapter) connect TDO directly to SWDIO.”To use the FT_PROG programming tool from FTDI you might need to erase the EEPROM of the FT232H to put it into a state where FT_PROG can detect the device. To do this you can use a small eeprom command line tool from libftdi by following the steps below. Note that these steps are for Windows users (since FT PROG is only usable on Windows). The OpenOCD directory file has a folder called “scripts”. In this folder, you will see "interface", "board", and "target" folders. And these are pretty much the only folders you need. To flash an image to internal flash, we need to define internal flash banks. It could be one bank like our present target, “efm32.cfg” did for us. To make sure, type the following: After rebooting, plug in the FT232H breakot to your PC using a USB micro cable. You should see a message pop up that the device is recognized and a driver is being installed.