iX
/
Sound11
Important changes to repositories hosted on mbed.com
Mbed hosted mercurial repositories are deprecated and are due to be permanently deleted in July 2026.
To keep a copy of this software download the repository Zip archive or clone locally using Mercurial.
It is also possible to export all your personal repositories from the account settings page.
Dependencies: mbed
Revision 1:f6f3187e44c5, committed 2016-06-09
- Comitter:
- xiaohonglv
- Date:
- Thu Jun 09 14:15:51 2016 +0000
- Parent:
- 0:72ee6ba483f8
- Commit message:
- buzzer version 2
Changed in this revision
| main.cpp | Show annotated file Show diff for this revision Revisions of this file |
--- a/main.cpp Thu Jun 09 10:12:11 2016 +0000
+++ b/main.cpp Thu Jun 09 14:15:51 2016 +0000
@@ -1,20 +1,27 @@
#include "mbed.h"
PwmOut buzzer(p23);
+
// red light
-while (flag = 1);
-{
-
- int main() {
+ float frequency[]= {500,0,500,0,500,0,500,0,500,0} ;//alarm frequency array
-
- speaker.period_ms(1); //1ms period 1k Hz //
+ float beat[]= {1,1,1,1,1,1,1,1,1,1}; //beat array
+ int
+ main()
+ {
+ while (1) {
+ for (
+ int
+ i=0;
+ i<=9 ;
+ i++) {buzzer.period(1/(frequency[i])); // PMW period 1/frequency
+ buzzer=0.5; //50% duty cycle
+ wait(0.5*beat[i]); //hold for beat period
+ }
+ }
+ }
- speaker = 0.5; //50% duty cycle //
- }
-
-}
// yellow light
@@ -53,9 +60,9 @@
int main() {
- speaker.period_ms(1); //1ms period 1k Hz //
+ buzzer.period_ms(1); //1ms period 1k Hz //
- speaker = 0; //0% duty cycle //
+ buzzer = 0; //0% duty cycle //
}
@@ -69,12 +76,3 @@
-
-
-
-
-
-
-
-
-