Takumi Okamoto
AD変換の値を音を出力する
Revision 0:90daceb61231, committed 2011-07-13
- Comitter:
- MrBearing
- Date:
- Wed Jul 13 06:38:26 2011 +0000
- Commit message:
Changed in this revision
| main.cpp | Show annotated file Show diff for this revision Revisions of this file |
| mbed.bld | Show annotated file Show diff for this revision Revisions of this file |
--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/main.cpp Wed Jul 13 06:38:26 2011 +0000
@@ -0,0 +1,40 @@
+#include "mbed.h"
+
+#define PI 3.142
+#define AMP 0.8
+
+#define SIGNAL_OUTPUT_FREQ 25//usec
+// coz twice zone of human audibility
+AnalogOut signal(p18);
+AnalogIn adin(p17);
+
+Ticker t_wave;
+
+float freq;
+
+float wave_value;
+void sawtoothWave(){
+ wave_value+=freq*SIGNAL_OUTPUT_FREQ/1000000;
+ if(wave_value > 1.0)
+ wave_value = 0.0;
+ float output = AMP*wave_value;
+ signal = output;
+}
+
+float theata;
+void sinWave(){
+ theata += 2*PI*SIGNAL_OUTPUT_FREQ*freq/1000000;
+ if(theata > 2*PI)
+ theata = 0.0;
+ float output = AMP*( sin(theata)+0.5 );
+ signal = output;
+}
+
+int main() {
+ wave_value = 0.0;
+ freq = 1000;
+ t_wave.attach_us(&sinWave , SIGNAL_OUTPUT_FREQ);
+ while(1){
+ freq = 5000*adin.read();
+ }
+}
--- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/mbed.bld Wed Jul 13 06:38:26 2011 +0000 @@ -0,0 +1,1 @@ +http://mbed.org/users/mbed_official/code/mbed/builds/63bcd7ba4912