SWD/JTAG speed - Githubissues

square / pylink

Python Library for device debugging/programming via J-Link

https://pylink.readthedocs.io/en/latest/

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SWD/JTAG speed #22

Open mikolajrode opened 6 years ago

mikolajrode commented 6 years ago

Maximum JTAG speed (MAX_JTAG_SPEED) is defined and this definition is used for any used interface (JTAG or SWD) instead of having it separated or having one universal interface speed definition.
Maximum interface speed is actually dependent on JLink itself as in https://www.segger.com/products/debug-probes/j-link/models/model-overview/. Currently 50 MHz is the fastest available.

hkpeprah commented 6 years ago

Is the ask here to only check the speed against MIN/MAX when the interface is JTAG?

mikolajrode commented 6 years ago

I'd refactor MAX_JTAG_SPEED into MAX_INTERFACE_SPEED (as it actually refers to SWD or JTAG) and push it to 50000 (50 MHz). Second option, making less sense is to define separately MAX_JTAG_SPEED and MAX_SWD_SPEED and check them according to selected TIF (interface). However those max speeds would still be equal to 50 MHz.