Arcadie Cracan / Mbed 2 deprecated audioDemo

Audio demo

Dependencies:   mbed tsi_sensor

main.cpp@0:ed8de6dbc531, 2015-07-11 (annotated)

Committer:
acracan
Date:
Sat Jul 11 11:20:10 2015 +0000
Revision:
0:ed8de6dbc531
First commit.

Who changed what in which revision?

UserRevisionLine numberNew contents of line
acracan 0:ed8de6dbc531 1 #include "mbed.h"
acracan 0:ed8de6dbc531 2 #include "tsi_sensor.h"
acracan 0:ed8de6dbc531 3
acracan 0:ed8de6dbc531 4 /* This defines will be replaced by PinNames soon */
acracan 0:ed8de6dbc531 5 #if defined (TARGET_KL25Z) || defined (TARGET_KL46Z)
acracan 0:ed8de6dbc531 6 #define ELEC0 9
acracan 0:ed8de6dbc531 7 #define ELEC1 10
acracan 0:ed8de6dbc531 8 #elif defined (TARGET_KL05Z)
acracan 0:ed8de6dbc531 9 #define ELEC0 9
acracan 0:ed8de6dbc531 10 #define ELEC1 8
acracan 0:ed8de6dbc531 11 #else
acracan 0:ed8de6dbc531 12 #error TARGET NOT DEFINED
acracan 0:ed8de6dbc531 13 #endif
acracan 0:ed8de6dbc531 14 Serial pc(USBTX, USBRX);
acracan 0:ed8de6dbc531 15 AnalogOut DAC(PTE30);
acracan 0:ed8de6dbc531 16 //global variables used by interrupt routine
acracan 0:ed8de6dbc531 17 const int SAMPLE_COUNT = 128;
acracan 0:ed8de6dbc531 18 float samples[SAMPLE_COUNT];
acracan 0:ed8de6dbc531 19 int sampleIdx = 0;
acracan 0:ed8de6dbc531 20 float period = 1.0e-3f;
acracan 0:ed8de6dbc531 21 Timer sensorTimer;
acracan 0:ed8de6dbc531 22 PwmOut player(PTE31);
acracan 0:ed8de6dbc531 23 TSIAnalogSlider tsi(ELEC0, ELEC1, 40);
acracan 0:ed8de6dbc531 24 float sliderValue = 0.0;
acracan 0:ed8de6dbc531 25 bool active = false;
acracan 0:ed8de6dbc531 26
acracan 0:ed8de6dbc531 27 void computeSamples();
acracan 0:ed8de6dbc531 28 void writeSample();
acracan 0:ed8de6dbc531 29
acracan 0:ed8de6dbc531 30 int main(void) {
acracan 0:ed8de6dbc531 31 DAC = 0.0f;
acracan 0:ed8de6dbc531 32 computeSamples();
acracan 0:ed8de6dbc531 33 pc.printf("Hello World\n");
acracan 0:ed8de6dbc531 34 player.period(period);
acracan 0:ed8de6dbc531 35 player = 0.5f;
acracan 0:ed8de6dbc531 36 TPM0->SC |= TPM_SC_TOIE_MASK;
acracan 0:ed8de6dbc531 37 NVIC_SetVector(TPM0_IRQn, (uint32_t)&writeSample);
acracan 0:ed8de6dbc531 38 NVIC_EnableIRQ(TPM0_IRQn);
acracan 0:ed8de6dbc531 39
acracan 0:ed8de6dbc531 40 sensorTimer.start();
acracan 0:ed8de6dbc531 41 writeSample();
acracan 0:ed8de6dbc531 42 pc.printf("Hello again\n");
acracan 0:ed8de6dbc531 43 while (true) {
acracan 0:ed8de6dbc531 44 if (sensorTimer.read() > 100.0e-3f) {
acracan 0:ed8de6dbc531 45 sliderValue = tsi.readPercentage();
acracan 0:ed8de6dbc531 46 active = sliderValue > 0.0f ? true : false;
acracan 0:ed8de6dbc531 47 period = pow(10.0f, 0.5f * (1.0f - sliderValue)) * 7.0e-6f;
acracan 0:ed8de6dbc531 48 player.period(period);
acracan 0:ed8de6dbc531 49 sensorTimer.reset();
acracan 0:ed8de6dbc531 50 }
acracan 0:ed8de6dbc531 51 }
acracan 0:ed8de6dbc531 52 }
acracan 0:ed8de6dbc531 53
acracan 0:ed8de6dbc531 54 void computeSamples()
acracan 0:ed8de6dbc531 55 {
acracan 0:ed8de6dbc531 56 for(int k = 0; k < SAMPLE_COUNT; k++) {
acracan 0:ed8de6dbc531 57 samples[k]=(1.0f + sin(float(k) / float(SAMPLE_COUNT) * 6.283185f)) * 0.5f;
acracan 0:ed8de6dbc531 58 }
acracan 0:ed8de6dbc531 59 }
acracan 0:ed8de6dbc531 60
acracan 0:ed8de6dbc531 61 void writeSample()
acracan 0:ed8de6dbc531 62 {
acracan 0:ed8de6dbc531 63 if (active) {
acracan 0:ed8de6dbc531 64 sampleIdx = (sampleIdx + 1) % SAMPLE_COUNT;
acracan 0:ed8de6dbc531 65 DAC = samples[sampleIdx];
acracan 0:ed8de6dbc531 66 }
acracan 0:ed8de6dbc531 67 else {
acracan 0:ed8de6dbc531 68 DAC = 0.5f;
acracan 0:ed8de6dbc531 69 }
acracan 0:ed8de6dbc531 70 TPM0->SC |= TPM_SC_TOF_MASK;
acracan 0:ed8de6dbc531 71 }