DAPLink Download Speed

[Fairchi1d]

Compared with the ulink2 debugger, the download speed of daplink is much slower. Following list for details.
SWD mode 10MHz
File Size 40KB: DAPLink 5.1s ULINK2 4.3s
File Size 113KB: DAPLink 13.2s ULINK2 11s
File Size 241KB: DAPLink 27s ULINK2 22s

Is there a way to increase the speed?thank!

[flit]

Well, that's not really "much" slower… Due to the purely software based transfers, the SWD/JTAG frequency maxes out at ~1.7-2.3 MHz (it's also nonlinear), depending on the HIC. DAPLink uses the reference CMSIS-DAP code unmodified (like most CMSIS-DAP probes).

The frequency can be improved, but only by taking advantage of HIC-specific hardware and doing something like timer-driven DMA transfers to GPIO. However, flash programming is primarily bound by the performance of the target's flash controller rather than SWD/JTAG clock (as long as the host debugger is smart and does things like double buffering). Given that, plus the large number of HICs supported by DAPLink, this has never been a priority.