49 lines
1.5 KiB
INI
49 lines
1.5 KiB
INI
# SPDX-License-Identifier: GPL-2.0-or-later
|
|
|
|
#
|
|
# Config for Raspberry Pi GPIO header
|
|
#
|
|
# This is best used with a fast enough buffer but also
|
|
# is suitable for direct connection if the target voltage
|
|
# matches RPi's 3.3V and the cable is short enough.
|
|
#
|
|
# Do not forget the GND connection, e.g. pin 20 of the GPIO header.
|
|
#
|
|
|
|
if { [info exists GPIO_CHIP] } {
|
|
set _GPIO_CHIP $GPIO_CHIP
|
|
} else {
|
|
set _GPIO_CHIP 0
|
|
}
|
|
|
|
# GPIO 25 (pin 22) previously used for TMS/SWDIO is pulled-down by default.
|
|
# The JTAG/SWD specification requires pull-up at the target board
|
|
# for either signal. Connecting the signal pulled-up on the target
|
|
# to the pull-down on the adapter is not a good idea.
|
|
# GPIO 8 is pulled-up by default.
|
|
echo "Warn : TMS/SWDIO moved to GPIO 8 (pin 24). Check the wiring please!"
|
|
|
|
# Each of the JTAG lines need a gpio number set: tck tms tdi tdo
|
|
# Header pin numbers: 23 24 19 21
|
|
adapter gpio tck -chip $_GPIO_CHIP 11
|
|
adapter gpio tms -chip $_GPIO_CHIP 8
|
|
adapter gpio tdi -chip $_GPIO_CHIP 10
|
|
adapter gpio tdo -chip $_GPIO_CHIP 9
|
|
|
|
# Each of the SWD lines need a gpio number set: swclk swdio
|
|
# Header pin numbers: 23 24
|
|
adapter gpio swclk -chip $_GPIO_CHIP 11
|
|
adapter gpio swdio -chip $_GPIO_CHIP 8
|
|
|
|
# If you define trst or srst, use appropriate reset_config
|
|
# Header pin numbers: TRST - 26, SRST - 18
|
|
|
|
# adapter gpio trst -chip $_GPIO_CHIP 7
|
|
# reset_config trst_only
|
|
|
|
# adapter gpio srst -chip $_GPIO_CHIP 24
|
|
# reset_config srst_only srst_push_pull
|
|
|
|
# or if you have both connected,
|
|
# reset_config trst_and_srst srst_push_pull
|