DRAC ARM710 14-pin JTAG (J-Link like)

diff --git a/drac-arm710-jtag.txt b/drac-arm710-jtag.txt
new file mode 100644 (file)
index 0000000..4ec029a
--- /dev/null
+++ b/drac-arm710-jtag.txt
@@ -0,0 +1,26 @@
+j-link 14 pin connector on DRAC
+
+VDD 3V3         1 2  GND
+nTRST   3 4  GND
+TDI     5 6  GND ? not GND
+TMS     7 8  GND
+TCK     9 10 GND
+TDO    11 12 nSRST
+VDD    13 14 GND
+
+pi@rpi4:~/openocd-rpi2-stm32/openocd $ ./src/openocd -f ../rpi4-jtag.cfg
+Open On-Chip Debugger 0.11.0-rc1+dev-00010-gc69b4deae-dirty (2021-01-05-15:40)
+Licensed under GNU GPL v2
+For bug reports, read
+        http://openocd.org/doc/doxygen/bugs.html
+jtag
+Info : Listening on port 6666 for tcl connections
+Info : Listening on port 4444 for telnet connections
+Info : BCM2835 GPIO JTAG/SWD bitbang driver
+Info : clock speed 100 kHz
+Warn : There are no enabled taps.  AUTO PROBING MIGHT NOT WORK!!
+Info : JTAG tap: auto0.tap tap/device found: 0x18150121 (mfg: 0x090 (Chip Express), part: 0x8150, ver: 0x1)
+Warn : AUTO auto0.tap - use "jtag newtap auto0 tap -irlen 3 -expected-id 0x18150121"
+Warn : gdb services need one or more targets defined
+
+

diff --git a/rpi4-jtag.cfg b/rpi4-jtag.cfg
new file mode 100644 (file)
index 0000000..73e796d
--- /dev/null
+++ b/rpi4-jtag.cfg
@@ -0,0 +1,55 @@
+#
+# Config for using Raspberry Pi's expansion 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, pin 6 of the expansion header.
+#
+
+adapter driver bcm2835gpio
+
+bcm2835gpio_peripheral_base 0x3F000000
+
+# Transition delay calculation: SPEED_COEFF/khz - SPEED_OFFSET
+# These depend on system clock, calibrated for stock 700MHz
+# bcm2835gpio_speed SPEED_COEFF SPEED_OFFSET
+bcm2835gpio_speed_coeffs 146203 36
+
+# Each of the JTAG lines need a gpio number set: tck tms tdi tdo
+# Header pin numbers: 23 22 19 21
+#bcm2835gpio_jtag_nums 11 25 10 9
+bcm2835gpio_jtag_nums 22 27 18 23
+
+# Each of the SWD lines need a gpio number set: swclk swdio
+# Header pin numbers: 23 22
+#bcm2835gpio_swd_nums 11 25
+# swd gpio pins      swclk swio
+#bcm2835gpio_swd_nums 27    18
+
+# If you define trst or srst, use appropriate reset_config
+# Header pin numbers: TRST - 26, SRST - 18
+
+# bcm2835gpio_trst_num 7
+# reset_config trst_only
+bcm2835gpio_trst_num 17
+
+# bcm2835gpio_srst_num 24
+# reset_config srst_only srst_push_pull
+
+# or if you have both connected,
+# reset_config trst_and_srst srst_push_pull
+
+adapter speed 100
+transport select jtag
+
+## test which chip this is
+#swd newdap chip cpu -enable
+#dap create chip.dap -chain-position chip.cpu
+#target create chip.cpu cortex_m -dap chip.dap
+#
+#init
+
+# drac arm710
+jtag newtap auto0 tap -irlen 3 -expected-id 0x18150121