digitalWriteFast is not functional on STM32.. about arduino-dw1000 HOT 2 CLOSED

Hi !
digitalWrite is about 7us for arduino uno (atmega328p 16Mhz 5v) so we can expect it to be 14us for 8Mhz (3.3v)...
We must use a #ifdefine in the code in order to use digitalWriteFast when we are using an atmega but use simple digitalWrite for others (teensy, etc..).
What do you think about it ? Do you think you can do it and pull request ?
regards,
Leopold

from arduino-dw1000.

If you can wait a couple of days I should be able to give you some options. on stm32 I am using a different faster IO call that is 10 times faster (digitalWrite there is 1uS, my other call is 0.15uS).
The problem with the digitalFastWrite is the fact that the pin is not const from the point of view of the compiler.. I will have a play.
I dont use atmega chips, but I can check the dissassembly, if you can wait.
The only cost I believe is performance, and that depends a lot on the SPI clock being used.

from arduino-dw1000.