At Akiduki Denshi, you can buy FTDI2232D Module, named AE-FTDI2232.
Adding registers for safety, we can use this module as a JTAG dongle which is supported by OpenOCD.
Hardware notes:
- Remove JP2A so that logic level of channel A will be 3.3V
- Following is the signal connection:
40 AD0 ----[100 Ohm]-----> TCLK 39 AD1 ----[100 Ohm]-----> TDI 38 AD2 ----[100 Ohm]-----> TDO 37 AD3 ----[100 Ohm]-----> TMS 25 GND ------------------> GND
Software notes:
- You may need to add an entry in the file /etc/modprobe.d/blacklist.conf:
# Don't load the driver for usbserial interface blacklist ftdi_sio
- Specify -f interface/openocd-usb.cfg when you invoke OpenOCD.