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2 commits

Author SHA1 Message Date
AnHardt
fd0e81b0c7 Distinguish between BUZZER and SPEAKER (PR#2513)
A speaker needs a AC or a pulsed DC to make a sound, a buzzer only needs a DC.
A buzzer has it's own resonator. It works in most cases to feed the buzzer with a pulsed DC, but the sound will not be as loud as with pure DC.

There seem to be boards where the BEEPER-pin is not able to handle a PWM. Obviously intended for a buzzer.
To make these board able to handle a speaker

* replace the PWM based tone()-function again with a on-delay-off-delay loop.

Hopefully the last time I touch the beeper code.
2015-07-24 22:10:04 -05:00
AnHardt
722829b058 Move buzzing code to buzzr.h & buzzer.cpp (PR#2307)
at least the lcd independent part from Marlin_main.cpp.
2015-06-22 22:31:48 -04:00