Using latest openocd (0.7) with jlink adapter. I am familiar with openocd having done development on the lpc2378 arm7tdmi and stm32 cortex-m3 in the past - now using lpc1788 cortex-m3
so I run
sudo /usr/local/bin/openocd -f interface/jlink.cfg -f target/lpc1788.cfg
i get
Open On-Chip Debugger 0.7.0 (2014-01-17-02:33)
Licensed under GNU GPL v2
For bug reports, read
http://openocd.sourceforge.net/doc/doxygen/bugs.html
Info : only one transport option; autoselect ‘jtag’
adapter_nsrst_delay: 200
jtag_ntrst_delay: 200
adapter speed: 10 kHz
cortex_m3 reset_config vectreset
cortex_m3 reset_config sysresetreq
Info : J-Link initialization started / target CPU reset initiated
Info : J-Link ARM Lite V8 compiled Jun 1 2012 09:23:33
Info : J-Link caps 0xb9ff7bbf
Info : J-Link hw version 80000
Info : J-Link hw type J-Link
Info : J-Link max mem block 9824
Info : J-Link configuration
Info : USB-Address: 0x0
Info : Kickstart power on JTAG-pin 19: 0xffffff01
Info : Vref = 3.319 TCK = 0 TDI = 1 TDO = 1 TMS = 1 SRST = 0 TRST = 0
Info : J-Link JTAG Interface ready
Info : clock speed 10 kHz
Error: JTAG scan chain interrogation failed: all ones
Error: Check JTAG interface, timings, target power, etc.
Error: Trying to use configured scan chain anyway…
Error: lpc1788.cpu: IR capture error; saw 0x0f not 0x01
Warn : Bypassing JTAG setup events due to errors
Warn : Invalid ACK 0x7 in JTAG-DP transaction
Polling target lpc1788.cpu failed, GDB will be halted. Polling again in 100ms
Polling target lpc1788.cpu failed, GDB will be halted. Polling again in 300ms
Polling target lpc1788.cpu failed, GDB will be halted. Polling again in 700ms
Polling target lpc1788.cpu failed, GDB will be halted. Polling again in 1500ms
Any ideas where these errors stem from? I grabbed NXP’s flashmagic program (after doing some googling on this subject) and wiped out the flash - then made sure I can read signature values and chip id’s. all good. but still cant initialize the board correctly under linux openocd (see above errors).
dmesg shows my jlink lite adapter
12502.642199] usb 1-3.2: new full speed USB device number 16 using ehci_hcd
[12502.729570] usb 1-3.2: New USB device found, idVendor=1366, idProduct=0101
[12502.729577] usb 1-3.2: New USB device strings: Mfr=1, Product=2, SerialNumber=3
[12502.729581] usb 1-3.2: Product: J-Link
[12502.729584] usb 1-3.2: Manufacturer: SEGGER
[12502.729587] usb 1-3.2: SerialNumber: 000238003071
Any clues?
Thanks in advance