[AVR] Let laser use some servo timers when they're not used

[GMagician]

Relax sanity check when, in some custom configurastions, servo timer is freed

Fix #18973

[GMagician]

Added auto release timer resources

[chepo92]

What about:
#if NUM_SERVOS > 0
#define _useTimer3
#if NUM_SERVOS > SERVOS_PER_TIMER
#define _useTimer4

[GMagician]

AFAIK now (#19025) it uses timer 4. Not used by laser. When servos are 0 HAS_SERVOS is false and nothing is used

[chepo92]

AFAIK now (#19025) it uses timer 4.

Not yet merged :D

Not used by laser. When servos are 0 HAS_SERVOS is false and nothing is used

I think that is not always true for some boards, in the case that you have a Laser & BLtouch, as the later includes the servo file and messes everything, ( related to #18973 )

[GMagician]

That's ok about bl-touch and laser. But bltouch needs servo code so a timer is also needed to properly generate pwm.

Then:
0 servos used : no timers used (laser available)
1-12 servos used: only timer 4 used (laser available)
13-24 servos used: timer 4 and 3 used (no laser)

I think that once merged #19025 you have solved all your problem