Hi all,
I recently bought a new laptop so decided to make a new wiggler that
works on USB. I made a PCB of the jtagkey schematic (except I added
RX/TX pins to the header) at:
http://modularcircuits.com/usb_programmer.htm
and the MProg settings from:
http://www.ethernut.de/en/hardware/turtelizer/index.html
and using the turtelizer driver that comes with openocd.
and am having some trouble with getting it to work. I keep getting
communication failure, and using a multimeter, the reset signals from
the FT2232L IC do not chage states. (nTRST remains high and its enable
low (enabled), nSRST low and its enable is always high)
I am trying to program an AT91SAM7A3 that I know is working at least
because it currently has usb code in it which enumerates when i plug it
into a pc. The problem appears to be that signals are not coming out of
the ft2232 properly.
I get the following output from R204 openocd:
Info: openocd.c:93 main(): Open On-Chip Debugger (2007-09-05 09:00
CEST)
Debug: jtag.c:1407 jtag_init(): -
Debug: ft2232.c:1296 ft2232_init_ftd2xx(): 'ft2232' interface using
FTD2XX with 'jtagkey' layout (0403:bdc8)
Debug: ft2232.c:1385 ft2232_init_ftd2xx(): current latency timer: 2
Debug: ft2232.c:1651 jtagkey_init(): 80 08 1b
Debug: ft2232.c:1709 jtagkey_init(): 82 09 0f
Debug: ft2232.c:253 ft2232_speed(): 86 00 00
Debug: jtag.c:295 jtag_call_event_callbacks(): jtag event: TRST
asserted
Debug: jtag.c:1197 jtag_reset_callback(): -
Debug: jtag.c:295 jtag_call_event_callbacks(): jtag event: TRST
asserted
Debug: jtag.c:1197 jtag_reset_callback(): -
Error: jtag.c:1253 jtag_examine_chain(): JTAG communication failure,
check connection, JTAG interface, target power etc.
Error: jtag.c:1440 jtag_init(): trying to validate configured JTAG
chain anyway...
Debug: jtag.c:295 jtag_call_event_callbacks(): jtag event: TRST
asserted
Debug: jtag.c:1197 jtag_reset_callback(): -
Error: jtag.c:1346 jtag_validate_chain(): Error validating JTAG scan
chain, IR mismatch, scan returned 0x3f
Debug: jtag.c:295 jtag_call_event_callbacks(): jtag event: TRST
asserted
Debug: jtag.c:1197 jtag_reset_callback(): -
Error: jtag.c:1346 jtag_validate_chain(): Error validating JTAG scan
chain, IR mismatch, scan returned 0x3f
Debug: jtag.c:295 jtag_call_event_callbacks(): jtag event: TRST
asserted
Debug: jtag.c:1197 jtag_reset_callback(): -
Error: jtag.c:1346 jtag_validate_chain(): Error validating JTAG scan
chain, IR mismatch, scan returned 0x3f
Debug: jtag.c:295 jtag_call_event_callbacks(): jtag event: TRST
asserted
Debug: jtag.c:1197 jtag_reset_callback(): -
Error: jtag.c:1346 jtag_validate_chain(): Error validating JTAG scan
chain, IR mismatch, scan returned 0x3f
Debug: jtag.c:295 jtag_call_event_callbacks(): jtag event: TRST
asserted
Debug: jtag.c:1197 jtag_reset_callback(): -
Error: jtag.c:1346 jtag_validate_chain(): Error validating JTAG scan
chain, IR mismatch, scan returned 0x3f
Debug: jtag.c:295 jtag_call_event_callbacks(): jtag event: TRST
asserted
Debug: jtag.c:1197 jtag_reset_callback(): -
Error: jtag.c:1346 jtag_validate_chain(): Error validating JTAG scan
chain, IR mismatch, scan returned 0x3f
Error: jtag.c:1448 jtag_init(): Could not validate JTAG chain, exit
and my script is:
telnet_port 4444
gdb_port 3333
#interface
interface ft2232
ft2232_device_desc "Turtelizer JTAG/RS232 Adapter A"
ft2232_layout "jtagkey"
ft2232_vid_pid 0x0403 0xBDC8
jtag_speed 0
jtag_nsrst_delay 2000
jtag_ntrst_delay 2000
#use combined on interfaces or targets that can't set TRST/SRST
separately
reset_config srst_only srst_pulls_trst
#jtag scan chain
#format L IRC IRCM IDCODE (Length, IR Capture, IR Capture Mask, IDCODE)
jtag_device 4 0x1 0xf 0xe
#target configuration
daemon_startup reset
#target <type> <startup mode>
#target arm7tdmi <reset mode> <chainpos> <endianness> <variant>
target arm7tdmi little run_and_init 0 arm7tdmi
run_and_halt_time 0 30
# flash-options AT91
target_script 0 reset openocd_at91sam7a3_flash.script
working_area 0 0x00200000 0x4000 nobackup
flash bank at91sam7 0 0 0 0 0
I've tried a lot of changes in the script, and even tried some other
drivers, and openocd R141, but still get the same communication failure.
Has anyone made a FT2232 wiggler that can help me as I am starting to
run out of ideas?