litex-boards/litex_boards/prog/openocd_marblemini.cfg

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# openocd config file for Marble Mini
# https://github.com/BerkeleyLab/Marble-mini
interface ftdi
# This string needs programming into U21 EEPROM attached to U23 FT4232H
# ftdi_device_desc "Marble Mini"
# Pin assignment consistent with MPSSE Channel A, Table 3.14 for FT4232H-56Q
# ADBUS0 (pin 12) USB_TCK
# ADBUS1 (pin 13) USB_TDI
# ADBUS2 (pin 14) USB_TDO
# ADBUS3 (pin 15) USB_TMS
# Additional pin, GPIOL0, set high
# ADBUS4 (pin 17) EN_USB_JTAG
# check logic of EN_USB_JTAG:
# routed to U39-3 P0_2 for informational purposes
# also to Q5, forces disable of Self_FPGA_* buffers
# Default for FT4232H
ftdi_vid_pid 0x0403 0x6011
# Choose channel for FPGA JTAG, 0 == Channel A?
ftdi_channel 0
# Just TCK TDI TDO TMS, all other pins driven high.
# Not sure what controls DBUS banks C, D, and maybe even B.
ftdi_layout_init 0xfff8 0xfffb
reset_config none
# default speed
adapter_khz 15000
# Cribbed from openocd-code/tcl/board/kasli.cfg
source [find cpld/xilinx-xc7.cfg]
source [find cpld/jtagspi.cfg]
# Following lines found in git head, but don't work with older openocd
# version 0.10.0 available with apt-get in Debian Buster.
# source [find fpga/xilinx-xadc.cfg]
# source [find fpga/xilinx-dna.cfg]