On Sat, Jul 16, 2011 at 10:31 AM, Xiaofan Chen <xiaof...@gmail.com> wrote:
> Actually the result is pretty close for the LPC-P2148 based test.
> jtag_khz = 1500 KHz, 38.927 KiB/s (ftd2xx) versus 38.754 KiB/s.
>
The above is for Amontec JtagKey2 which is high speed USB.
The J-Link under OpenOCD (full speed USB but with intelligence
in it) seems much slower than Amontec JtagKey2. The speed
is 18.813 KiB/s at the same 1500KHz jtag_khz for J-Link (V6, IAR OEM).
D:\work\openocd\build_cxf\openocd_15Jul2011\bin>openocd_libftdi_mingw.exe
-f olimex_lpc_p2148_jlink.cfg
Open On-Chip Debugger 0.5.0-dev-00956-ge7269e3-dirty (2011-07-15-22:00)
Licensed under GNU GPL v2
For bug reports, read
http://openocd.berlios.de/doc/doxygen/bugs.html
Warn : Adapter driver 'jlink' did not declare which transports it
allows; assuming legacy JTAG-only
Info : only one transport option; autoselect 'jtag'
Warning - assuming default core clock 12MHz! Flashing may fail if
actual core clock is different.
trst_and_srst separate srst_gates_jtag trst_push_pull srst_open_drain
adapter_nsrst_delay: 100
jtag_ntrst_delay: 100
1500 kHz
Info : J-Link initialization started / target CPU reset initiated
Info : J-Link ARM V6 compiled Feb 1 2011 14:28:14
Info : J-Link caps 0x99ff7bbf
Info : J-Link hw version 60000
Info : J-Link hw type J-Link
Info : J-Link max mem block 8864
Info : J-Link configuration
Info : USB-Address: 0xff
Info : Kickstart power on JTAG-pin 19: 0xffffff01
Info : Vref = 3.280 TCK = 1 TDI = 0 TDO = 0 TMS = 0 SRST = 0 TRST = 0
Info : J-Link JTAG Interface ready
Info : clock speed 1500 kHz
Info : JTAG tap: lpc2148.cpu tap/device found: 0x4f1f0f0f (mfg: 0x787,
part: 0xf1f0, ver: 0x4)
Info : Embedded ICE version 4
Info : lpc2148.cpu: hardware has 2 breakpoint/watchpoint units
Info : accepting 'telnet' connection from 4444
Info : JTAG tap: lpc2148.cpu tap/device found: 0x4f1f0f0f (mfg: 0x787,
part: 0xf1f0, ver: 0x4)
target state: halted
target halted in ARM state due to debug-request, current mode: Supervisor
cpsr: 0x000000d3 pc: 0x00000000
fast memory access is enabled
dcc downloads are enabled
wrote 232748 bytes from file lpc2148.hex in 12.082000s (18.813 KiB/s)
--
Xiaofan
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