EE 308 Input Capture

USING INPUT CAPTURE 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 IC (TIOS reg)
(d): Set edge to capture (TCTL 3-4 regs)
(e): Clear Flag (TFLG1 reg)
(f): Enable Int if using (TMSK1 reg)

2.

In interrupt service routine (or main program if not using interrupts):

(a): Read time of edge from TCx
(b): Clear flag (TFLG1 reg)