Sakis Kasampalis
/
sound-switch
Toggle the LED of the LPC1768 using an electret microphone
sound_switch.cpp@0:01301c8c38ab, 2017-06-04 (annotated)
- Committer:
- faif
- Date:
- Sun Jun 04 11:50:37 2017 +0000
- Revision:
- 0:01301c8c38ab
Toggle the LED of lpc1768 using an electret microphone
Who changed what in which revision?
User | Revision | Line number | New contents of line |
---|---|---|---|
faif | 0:01301c8c38ab | 1 | #include "mbed.h" |
faif | 0:01301c8c38ab | 2 | #include "sound_switch.h" |
faif | 0:01301c8c38ab | 3 | |
faif | 0:01301c8c38ab | 4 | static const float THRESHOLD = 0.5; |
faif | 0:01301c8c38ab | 5 | const float BOUNCE_DELAY = 0.2; |
faif | 0:01301c8c38ab | 6 | |
faif | 0:01301c8c38ab | 7 | enum |
faif | 0:01301c8c38ab | 8 | { |
faif | 0:01301c8c38ab | 9 | OFF = 0, |
faif | 0:01301c8c38ab | 10 | ON = 1 |
faif | 0:01301c8c38ab | 11 | }; |
faif | 0:01301c8c38ab | 12 | |
faif | 0:01301c8c38ab | 13 | int main() |
faif | 0:01301c8c38ab | 14 | { |
faif | 0:01301c8c38ab | 15 | float i; |
faif | 0:01301c8c38ab | 16 | while (true) |
faif | 0:01301c8c38ab | 17 | { |
faif | 0:01301c8c38ab | 18 | i = mic; |
faif | 0:01301c8c38ab | 19 | if (i < THRESHOLD) |
faif | 0:01301c8c38ab | 20 | { |
faif | 0:01301c8c38ab | 21 | toggle_state(myled); |
faif | 0:01301c8c38ab | 22 | wait(BOUNCE_DELAY); |
faif | 0:01301c8c38ab | 23 | } |
faif | 0:01301c8c38ab | 24 | } |
faif | 0:01301c8c38ab | 25 | } |
faif | 0:01301c8c38ab | 26 | |
faif | 0:01301c8c38ab | 27 | void toggle_state(DigitalOut& s) |
faif | 0:01301c8c38ab | 28 | { |
faif | 0:01301c8c38ab | 29 | switch(s) |
faif | 0:01301c8c38ab | 30 | { |
faif | 0:01301c8c38ab | 31 | case OFF: |
faif | 0:01301c8c38ab | 32 | s = ON; |
faif | 0:01301c8c38ab | 33 | break; |
faif | 0:01301c8c38ab | 34 | case ON: |
faif | 0:01301c8c38ab | 35 | s = OFF; |
faif | 0:01301c8c38ab | 36 | break; |
faif | 0:01301c8c38ab | 37 | } |
faif | 0:01301c8c38ab | 38 | } |