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Open source ARM Debugger
By EUA
#172929
I tried latest openocd patches and able to program my nrf51822 with Jlink SWD
But I get really low speeds, like 0.230 Kb/s If I directly connect programmer to USB port of my PC, laptop...

Than switched to STLink V2, hla swd. It gives ~0.200 Kb/s. Still too low.

If I use USB Hub between PC and the programmer, than speed became ~ 2.3 Kbps (10x faster.) which is weird.

Probably USB HUB caches/buffers next requests, who knows.

But using windows and SEGGER utility, I can easily see > 15 Kb/s.
Not tried to use USB HUB with that setup, or use openocd at windows yet.

Anyone know/have any idea about what I am making wrong?
Thanks.