Changes between Initial Version and Version 1 of Debugging/OpenOCD/Raspberry_Pi

Timestamp:

09/17/15 17:20:49 (9 years ago)

Author:

Pavel Pisa

Comment:

Raspberry Pi debugging with OpenOCD.

Debugging/OpenOCD/Raspberry_Pi

@@ +1 @@
+= Raspberry Pi Debugging with OpenOCD =
+
+[[TOC(Debugging/OpenOCD/Raspberry_Pi , depth=2)]]
+
+The scripts for OpenOCD debugging can be found in my
+[https://github.com/ppisa/rpi-utils/tree/master/jtag-debug rpi-utils]
+GitHUB repo for example. They are listed below as well.
+
+I have issues to load application image over JTAG (some data corruption,
+may it be by overload of bus arbitration). But when application is load
+over TFTP from U-boot it can be fully debugged.
+
+The JTAG interface has to be enabled first. For U-boot based
+RTEMS image load it can be achieved by U-boot commands
+{{{
+mw.l 0x20200000 0x04a020
+mw.l 0x20200008 0x65b6c0
+}}}
+
+File "rpi-jt_usb5.cfg":
+{{{
+#daemon configuration
+telnet_port 4444
+gdb_port 3333
+
+# tell gdb our flash memory map
+# and enable flash programming
+#gdb_memory_map enable
+#gdb_flash_program enable
+
+interface ftdi
+#ftdi_device_desc "Dual RS232"
+ftdi_vid_pid 0x0403 0x6010
+
+ftdi_layout_init 0x0cf8 0x0cfb
+ftdi_layout_signal nTRST -data 0x0010 -noe 0x0800
+ftdi_layout_signal nSRST -ndata 0x0040 -noe 0x0400
+
+ftdi_layout_signal nTRST -data 0x0010
+ftdi_layout_signal nSRST -ndata 0x0040
+ftdi_layout_signal LED -ndata 0x0800
+
+transport select jtag
+
+#ftdi_layout_signal SWD_EN -ndata 0x0400
+#ftdi_layout_signal SWDIO_OE -alias TMS
+
+adapter_khz 500
+
+reset_config none
+
+#jtag_nsrst_delay 400
+#jtag_ntrst_delay 400
+
+if { [info exists CHIPNAME] } {
+   set  _CHIPNAME $CHIPNAME
+} else {
+   set  _CHIPNAME raspi
+}
+
+reset_config none
+
+if { [info exists CPU_TAPID ] } {
+   set _CPU_TAPID $CPU_TAPID
+} else {
+   set _CPU_TAPID 0x07b7617F
+}
+jtag newtap $_CHIPNAME arm -irlen 5 -expected-id $_CPU_TAPID
+
+set _TARGETNAME $_CHIPNAME.arm
+target create $_TARGETNAME arm11 -chain-position $_TARGETNAME
+
+adapter_khz 500
+
+init
+
+#reset halt
+
+#wait_halt
+
+# check TDO connection
+#echo 24 > /sys/class/gpio/export
+#echo out > /sys/class/gpio/gpio24/direction
+#echo 1 > /sys/class/gpio/gpio24/value
+}}}
+
+File "gdb-openocd.init":
+{{{
+target remote localhost:3333
+#load
+}}}
+
+File "rpi-jt_usb5-ddd"
+{{{
+#!/bin/sh
+
+SCRIP_DIR="$(dirname "$(readlink -f "$0")")"
+
+nc -w 3 -z localhost 4444
+if [ $? -ne 0 ]
+then
+  echo "Starting OpenOCD"
+  openocd -f "$SCRIP_DIR/rpi-jt_usb5.cfg" &
+  OPENOCD_PID=$!
+  nc -w 10 -z localhost 4444
+  if [ $? -ne 0 ]
+  then
+    echo "OpenOCD start failed"
+  fi
+fi
+
+ddd --debugger arm-elf-gdb -x "$SCRIP_DIR/gdb-openocd.init" "$1"
+
+kill $OPENOCD_PID
+}}}