bissen21/Marlin_Firmware
1
0
Fork 0
Code Issues Pull Requests Projects Releases 4 Wiki Activity

Distinguish between BUZZER and SPEAKER (PR#2513)

Browse Source 
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.
This commit is contained in:
AnHardt
2015-07-24 23:19:09 +02:00
committed by Richard Wackerbarth
parent 53d9c9ff23
commit fd0e81b0c7
18 changed files with 32 additions and 2 deletions
Download Patch File Download Diff File Expand all files Collapse all files

1
Marlin/example_configurations/delta/kossel_mini/Configuration.h
View File

@ -771,6 +771,7 @@ const bool Z_PROBE_ENDSTOP_INVERTING = false; // set to true to invert the logic
//#define ENCODER_STEPS_PER_MENU_ITEM 5 // Set according to ENCODER_PULSES_PER_STEP or your liking
//#define ULTIMAKERCONTROLLER //as available from the Ultimaker online store.
//#define ULTIPANEL //the UltiPanel as on Thingiverse
//#define SPEAKER // The sound device is a speaker - not a buzzer. A buzzer resonates with his own frequency.
//#define LCD_FEEDBACK_FREQUENCY_DURATION_MS 100 // the duration the buzzer plays the UI feedback sound. ie Screen Click
//#define LCD_FEEDBACK_FREQUENCY_HZ 1000 // this is the tone frequency the buzzer plays when on UI feedback. ie Screen Click
// 0 to disable buzzer feedback. Test with M300 S<frequency Hz> P<duration ms>