[ts-7000] ts-7500: how fast can I get a digital ouput to pulse?

["Jon L" <>]

say I want to pulse a digital output pin to pulse with a ts-7500 with a 50% 
duty cycle. 

what is the fastest signal I can get and what is the best way to program such a 
signal?

I can only think of this in C:

do {
      sbuslock();
      setdiopin(pin, 0);
      usleep(1);
      setdiopin(pin,1); 
      sbusunlock();
      }
      while ( hell_not_frozen_over); 


but is this reliable?

and what will this do to the other processes running on the system?

is this a cpu hog or is there a better way to do this?







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