Sakis Kasampalis / Mbed 2 deprecated sound-switch

Toggle the LED of the LPC1768 using an electret microphone

Dependencies:   mbed

Files at this revision

API Documentation at this revision

Revision 0:01301c8c38ab, committed 2017-06-04

Comitter:
faif
Date:
Sun Jun 04 11:50:37 2017 +0000
Commit message:
Toggle the LED of lpc1768 using an electret microphone

Changed in this revision

mbed.bld Show annotated file Show diff for this revision Revisions of this file
sound_switch.cpp Show annotated file Show diff for this revision Revisions of this file
sound_switch.h Show annotated file Show diff for this revision Revisions of this file 
diff -r 000000000000 -r 01301c8c38ab mbed.bld
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/mbed.bld	Sun Jun 04 11:50:37 2017 +0000
@@ -0,0 +1,1 @@
+http://mbed.org/users/mbed_official/code/mbed/builds/e1686b8d5b90
\ No newline at end of file

diff -r 000000000000 -r 01301c8c38ab sound_switch.cpp
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/sound_switch.cpp	Sun Jun 04 11:50:37 2017 +0000
@@ -0,0 +1,38 @@
+#include "mbed.h"
+#include "sound_switch.h"
+
+static const float THRESHOLD = 0.5;
+const float BOUNCE_DELAY = 0.2;
+
+enum 
+{
+    OFF = 0,
+    ON = 1
+};
+
+int main() 
+{
+    float i;
+    while (true)
+    {        
+        i = mic;
+        if (i < THRESHOLD)
+        {
+            toggle_state(myled);
+            wait(BOUNCE_DELAY);
+        }
+    }
+}
+
+void toggle_state(DigitalOut& s)
+{
+    switch(s)
+    {
+        case OFF:
+            s = ON;
+            break;
+        case ON:
+            s = OFF;
+            break;
+    }
+}
\ No newline at end of file

diff -r 000000000000 -r 01301c8c38ab sound_switch.h
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/sound_switch.h	Sun Jun 04 11:50:37 2017 +0000
@@ -0,0 +1,9 @@
+#ifndef SOUND_SWITCH_H
+#define SOUND_SWITCH_H
+
+AnalogIn mic(p20);
+DigitalOut myled(LED4);
+
+void toggle_state(DigitalOut& state);
+
+#endif
\ No newline at end of file