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Pulsweitenmodulation - Generieren eines x Hz Tones mittels PWM
Dependencies: mbed
Fork of PwmOut by
main.cpp@3:f40b90476234, 2015-09-06 (annotated)
- Committer:
- stefan1691
- Date:
- Sun Sep 06 15:24:01 2015 +0000
- Revision:
- 3:f40b90476234
- Parent:
- 1:4842c28f7ee3
Summer lauter gestellt
Who changed what in which revision?
User | Revision | Line number | New contents of line |
---|---|---|---|
stefan1691 | 1:4842c28f7ee3 | 1 | /** Pulsweitenmodulation - Generieren eines x Hz Tones mittels PWM |
marcel1691 | 0:06b1d306796f | 2 | */ |
marcel1691 | 0:06b1d306796f | 3 | #include "mbed.h" |
marcel1691 | 0:06b1d306796f | 4 | |
stefan1691 | 1:4842c28f7ee3 | 5 | PwmOut speaker( D7 ); |
marcel1691 | 0:06b1d306796f | 6 | |
marcel1691 | 0:06b1d306796f | 7 | int main() |
marcel1691 | 0:06b1d306796f | 8 | { |
stefan1691 | 1:4842c28f7ee3 | 9 | while ( 1 ) |
marcel1691 | 0:06b1d306796f | 10 | { |
stefan1691 | 1:4842c28f7ee3 | 11 | // Polizei Sirene |
stefan1691 | 3:f40b90476234 | 12 | speaker.period( 1.0 / 3969.0 ); // 3969 = Tonfrequenz in Hz |
stefan1691 | 1:4842c28f7ee3 | 13 | speaker = 0.5f; |
stefan1691 | 1:4842c28f7ee3 | 14 | wait( 0.5f ); |
stefan1691 | 3:f40b90476234 | 15 | speaker.period( 1.0 / 2800.0 ); |
stefan1691 | 1:4842c28f7ee3 | 16 | wait( 0.5f ); |
marcel1691 | 0:06b1d306796f | 17 | } |
marcel1691 | 0:06b1d306796f | 18 | } |