This Timer mode works similar to a counter, but uses an interrupt routine to increment the counter so can't handle real high speed counts, and has a bit more internal overhead than a regular counter. Setting it up is basically the same as period in:
1) Enable a Timer:
AddRequest(ID, LJ_ioPUT_CONFIG, LJ_chNUMBER_TIMERS_ENABLED, 1, 0, 0)
2) Set the mode:
AddRequest(ID, LJ_ioPUT_TIMER_MODE, 0, LJ_tmFIRMCOUNTER, 0, 0)
3) Set the clock frequency and divisor:
// use system clock so works on U3 and UE9:
AddRequest(ID, LJ_ioPUT_CONFIG, LJ_chTIMER_CLOCK_BASE, LJ_tcSYS, 0, 0)
AddRequest(ID, LJ_ioPUT_CONFIG, LJ_chTIMER_CLOCK_DIVISOR, 48, 0, 0)
4) GoOne() to actually execute the commands:
GoOne(ID)
5) Create a channel to read the Timer. I/O Type is Timer, Channel # is the timer #, in this case 0.
You can reset the timer to 0 by using LJ_ioPUT_TIMER_VALUE, put please read the section on resetting counters and how to get around it.
AddRequest(ID, LJ_ioPUT_TIMER_VALUE, 0, 0, 0, 0)
