Using Output Capture on the HC12

USING OUTPUT COMPARE ON THE HC12

1.

In the main program:

(a): Turn on timer subsystem (TSCR reg)
(b): Set prescaler (TMSK2 reg)
(c): Set up PTx as OC (TIOS reg)
(d): Set action on compare (TCTL 1-2 regs, OMx OLx bits)
(e): Clear Flag (TFLG1 reg)
(f): Enable int (TMSK1 reg)

2.

In interrupt service routine

(a)

Set time for next action to occur (write TCx reg)

For periodic events add time to TCx register

(b)

Clear flag (TFLG1 reg)