Diff: main.cpp

Revision:

0:ed8de6dbc531

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/main.cpp	Sat Jul 11 11:20:10 2015 +0000
@@ -0,0 +1,71 @@
+#include "mbed.h"
+#include "tsi_sensor.h"
+
+/* This defines will be replaced by PinNames soon */
+#if defined (TARGET_KL25Z) || defined (TARGET_KL46Z)
+  #define ELEC0 9
+  #define ELEC1 10
+#elif defined (TARGET_KL05Z)
+  #define ELEC0 9
+  #define ELEC1 8
+#else
+  #error TARGET NOT DEFINED
+#endif
+Serial pc(USBTX, USBRX);
+AnalogOut DAC(PTE30);
+//global variables used by interrupt routine
+const int SAMPLE_COUNT = 128;
+float samples[SAMPLE_COUNT];
+int sampleIdx = 0;
+float period = 1.0e-3f;
+Timer sensorTimer;
+PwmOut player(PTE31);
+TSIAnalogSlider tsi(ELEC0, ELEC1, 40);
+float sliderValue = 0.0;
+bool active = false;
+
+void computeSamples();
+void writeSample();
+
+int main(void) {
+    DAC = 0.0f;
+    computeSamples();
+    pc.printf("Hello World\n");
+    player.period(period);
+    player = 0.5f;
+    TPM0->SC |= TPM_SC_TOIE_MASK;
+    NVIC_SetVector(TPM0_IRQn, (uint32_t)&writeSample);
+    NVIC_EnableIRQ(TPM0_IRQn);
+    
+    sensorTimer.start();
+    writeSample();
+    pc.printf("Hello again\n");
+    while (true) {
+        if (sensorTimer.read() > 100.0e-3f) {
+            sliderValue = tsi.readPercentage();
+            active = sliderValue > 0.0f ? true : false;
+            period = pow(10.0f, 0.5f * (1.0f - sliderValue)) * 7.0e-6f;
+            player.period(period);
+            sensorTimer.reset();
+        }
+    }
+}
+
+void computeSamples()
+{
+    for(int k = 0; k < SAMPLE_COUNT; k++) {
+        samples[k]=(1.0f + sin(float(k) / float(SAMPLE_COUNT) * 6.283185f)) * 0.5f;
+    }
+}
+
+void writeSample()
+{
+    if (active) {
+        sampleIdx = (sampleIdx + 1) % SAMPLE_COUNT;    
+        DAC = samples[sampleIdx];
+    }
+    else {
+        DAC = 0.5f;
+    }
+    TPM0->SC |= TPM_SC_TOF_MASK;
+}    
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