Shingo FUKUYA
for Airio-Base. PWM port out sample/test program.
Airio-Baseで PWMポート出力し、圧電ブザーを鳴らすサンプルコードです。
準備
- ピエゾ式圧電ブザー - ブザーの端子をP0_8とGNDに接続
- 部品例 KPEG-169 http://eleshop.jp/shop/g/gB1R361/
SWスイッチ動作
SWを押すと、LED1が点灯しドレミ…の音階が流れます。
ISPスイッチ動作
ISPを押すと、LED2が点灯し「ピポッ」と効果音が流れます。
PWMポート
PWM出力できるポートはP0_8に加え、P0_9、P0_18、P0_19でも可能です。ただし、PWM出力設定は全ポートで1つの設定を共有しているため、同時にPWMポートを使用しても最後に設定した値がすべてのポートに反映されます。
- 参考リンク
- Suga koubou様 PwmOut - PWM出力 https://os.mbed.com/users/okini3939/notebook/PwmOut_jp/
Revision 0:d5af51ac8126, committed 2018-10-26
- Comitter:
- mbed_crane_elec
- Date:
- Fri Oct 26 07:57:13 2018 +0000
- Commit message:
- 1st release.
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 |
diff -r 000000000000 -r d5af51ac8126 main.cpp
--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/main.cpp Fri Oct 26 07:57:13 2018 +0000
@@ -0,0 +1,79 @@
+#include "mbed.h"
+//-------------------------------------------------------------------------------
+//Port Settings
+DigitalOut led1(LED1);
+DigitalOut led2(P1_13,1);
+
+DigitalIn sw(P1_20);
+DigitalIn isp(P0_1);
+
+//These ports can be PWM port
+PwmOut bz(P0_8);
+//PwmOut bz(P0_9);
+//PwmOut bz(P0_18);
+//PwmOut bz(P0_19);
+
+volatile float Hz[] = {
+ 220.000,//A3
+ 246.942,//B3
+ 261.626,//C4
+ 293.665,//D4
+ 329.628,//E4
+ 349.228,//F4
+ 391.995,//G4
+ 440.000,//A4
+ 493.883,//B4
+ 523.251,//C5
+ 587.330,//D5
+ 659.255,//E5
+ 698.456,//F5
+ 783.991,//G5
+ 880.000//A5
+};
+
+//-------------------------------------------------------------------------------
+//Program
+int main()
+{
+
+ while(1)
+ {
+ // Button "SW" function
+ if(sw == 0)
+ {
+ led1 = 0;//LED1 turn ON
+
+ //PWM output
+ for (int i = 0;i < 14;i++)
+ {
+ bz.period(1.0 / Hz[i]);// set to pulse period : (1.0 / xxx[Hz]) = T[sec]
+ bz.write(0.5);// set to pulse L/H duty : ex. (0.8) = 80% High
+ wait(0.3);// wait for 0.3 sec
+ bz.write(0.0);//PWM stop : pulse 0% (100% Low)
+ }
+ }
+ else
+ {
+ led1 = 1;//LED1 turn OFF
+ }
+
+ // Button "ISP" function
+ if(isp == 0)
+ {
+ led2 = 0;//LED2 turn ON
+ //PWM output
+ bz.period(1.0 / 2000);// set to 2000[Hz]
+ bz.write(0.5);// set to pulse L/H duty : ex. (0.8) = 80% High
+ wait(0.15);// wait for 0.15 sec
+ bz.period(1.0 / 1000);// set to 1000[Hz]
+ bz.write(0.5);// set to pulse L/H duty : ex. (0.8) = 80% High
+ wait(0.15);// wait for 0.15 sec
+
+ bz.write(0.0);//PWM stop : pulse 0% (100% Low)
+ }
+ else
+ {
+ led2 = 1;//LED2 turn OFF
+ }
+ }
+}
diff -r 000000000000 -r d5af51ac8126 mbed.bld --- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/mbed.bld Fri Oct 26 07:57:13 2018 +0000 @@ -0,0 +1,1 @@ +https://os.mbed.com/users/mbed_official/code/mbed/builds/e95d10626187 \ No newline at end of file