HI there, I'm very new in picbasic and need to have some expert's advise in here. I wish to drive an Allegro A6280 with PIC16F628 by using shiftout. It seems that the data can be sent but the problem is I need to continuously pulse the clock with the code below to keep the A6280's PWM in order to run.

clksend:
high clk
low clk
goto clksend

It seems that when I execute this command, my pic is busy with the code and I can't send the next data to the A6280. Anyone can give me a good suggestion in here as I'm lost in no where right now. Thanks in advise.