tcl/interface: universal config for all Raspberry Pi models

[openocd.git] / tcl / interface / raspberrypi-gpio-connector.cfg

diff --git a/tcl/interface/raspberrypi-gpio-connector.cfg b/tcl/interface/raspberrypi-gpio-connector.cfg
new file mode 100644 (file)
index 0000000..eff73fc
--- /dev/null
+++ b/tcl/interface/raspberrypi-gpio-connector.cfg
@@ -0,0 +1,42 @@
+# 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.
+#
+
+# 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 0 11
+adapter gpio tms -chip 0 8
+adapter gpio tdi -chip 0 10
+adapter gpio tdo -chip 0 9
+
+# Each of the SWD lines need a gpio number set: swclk swdio
+# Header pin numbers: 23 24
+adapter gpio swclk -chip 0 11
+adapter gpio swdio -chip 0 8
+
+# If you define trst or srst, use appropriate reset_config
+# Header pin numbers: TRST - 26, SRST - 18
+
+# adapter gpio trst -chip 0 7
+# reset_config trst_only
+
+# adapter gpio srst -chip 0 24
+# reset_config srst_only srst_push_pull
+
+# or if you have both connected,
+# reset_config trst_and_srst srst_push_pull