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Published 20 hours ago • verified publisher icon square

SWD/JTAG speed

Open mikolajrode opened this issue 7 years ago • 2 comments

  • 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.

mikolajrode avatar Mar 12 '18 00:03 mikolajrode

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

hkpeprah avatar Mar 12 '18 16:03 hkpeprah

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.

mikolajrode avatar Mar 12 '18 22:03 mikolajrode