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Mathias K. kesmtp at freenet.deHello, On 07.05.2012 21:12, Steve Markgraf wrote: > Have you actually tried openocd_calyso.cfg as-is? It works fine here, > even with a J100i. yes, i have tried it before but i got the same results: Info : 208 46 core.c:1069 jtag_examine_chain(): TAP calypso.dsp does not have IDCODE Info : 209 46 core.c:951 jtag_examine_chain_display(): JTAG tap: calypso.arm tap/device found: 0xf9001807 (mfg: 0x403, part: 0x9001, ver: 0xf) Warn : 210 46 core.c:951 jtag_examine_chain_display(): JTAG tap: calypso.arm UNEXPECTED: 0xf9001807 (mfg: 0x403, part: 0x9001, ver: 0xf) Error: 211 47 core.c:951 jtag_examine_chain_display(): JTAG tap: calypso.arm expected 1 of 1: 0x3100e02f (mfg: 0x017, part: 0x100e, ver: 0x3) ... Info : 219 55 embeddedice.c:232 embeddedice_build_reg_cache(): Embedded ICE version 0 Error: 220 55 embeddedice.c:297 embeddedice_build_reg_cache(): unknown EmbeddedICE version (comms ctrl: 0x00000000) Did you solder anything else than the jtag signals + gnd/vcc? Is there anything else to take care (running firmware/custom firmware, batterie, external charger cable)? I use the arm usb tiny jtag adapter and the signals looking good so far. I also reduced the jtag speed but there is no difference. Regards, Mathias