XE164 Injector pulse measurement

XE164 has to acquire, measure and sincronize to the INJ-in signals (one for each motorbike injectors).
The best way is to use a dedicated XE164 peripheral: the CAPCOM2 unit.

The CAPCOM unit is designed for capturing, measuring various signals in respect to a base timer. The idea is the following:
- a timer is resetted and started once necessary (TIMER7)
- various I/O port signals can be used to capture the timer value at the signal trigger.
Since the same I/O port signal can be used on various capturing units, MaxPowerCMD will:
- INJ-in rising edge is used to capture the delay between the 0 degree and the injection firing time (let's call t1)
- INJ-in falling edge is used to capture the time when the motorbike ECU likes to stop the injection pulse (let's call t2)
Therefore it will be possible to calculate the injection pulsewidth by subtracting t2 from t1, D=t2-t1.

Once the pulsewidth has been calculated, the CAPCOM timer can be reset, so to be ready for the incoming capturing phase.

To configure properly the XE164's CAPCOM is only necessary to estimate correctly the timing scale that the injector events require.
Supposing that the motorbike engine runs at 10000 RPM as max speed, so each injector will fire every 10000/60 Hz, so about 166Hz.
The second parameter to be considered is the measurement accurancy: each injection pulse could be around 2msec, so at least a precision of 0.1msec is required.
0.1 msec x 65535 = 6553.5msec is far enough.