The duty cycle of PWM generated to test the application varies over the
range from 0 to 255. The
range
of the duty cycle
can
be modified
based
on the
application.
This helps in easy visualization of varying duty cycle through the LEDs available in
the STK600. When the code is compiled and tested, the LEDs of STK600
shall
display
cycles repeatedly from 0x00 to 0xFF like a binary counter.
Note: In
the application demonstrated, the input pulse width is less than the time spent
by CPU in the capture ISR. As explained in
Application Constraints,
LED
port shows the lower steps (0 & 1) of PWM's duty cycle as
0x00.