Krzysztof Krawczyk
/
mech_instrum_lab_1_2_4_speakerab
Lab Day 2, Experiment 2.4: Speaker
Diff: main.cpp
- Revision:
- 0:08b089f9884b
diff -r 000000000000 -r 08b089f9884b main.cpp --- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/main.cpp Sat Aug 01 08:42:49 2020 +0000 @@ -0,0 +1,20 @@ +#include "mbed.h" +DigitalIn fire(p14); +PwmOut spkr(p26); +AnalogIn pot1(p19); +float start = 2000.0, end = 10000.0, step = 100; + +int main() +{ + while (1) { + for (float i=start; i<end; i+=step) { + spkr.period(1.0/i); + spkr=0.5; + wait(0.1); + } + spkr=0.0; + start = 3000.0; + end = 5000.0; + while(pot1.read() < 0.5) {} // this uses the pot to control the program + } +}