Diff: sine-wave.cpp

Revision:

0:66a0740d3ac0

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/sine-wave.cpp	Sat Feb 15 01:02:50 2014 +0000
@@ -0,0 +1,56 @@
+#include "mbed.h"
+#include "AnalogOut.h"
+#include "AnalogIn.h"
+#include <math.h>
+
+#define I2C0_SDA PTE25
+#define I2C0_SCL PTE24
+#define MMA8451_I2C_ADDRESS (0x1d<<1)
+#define MAG3110_I2C_ADDRESS (0x0E<<1)
+#define LIGHT_SENSOR_PIN PTE22
+#define PI 3.141f
+
+Serial pc_sine(USBTX, USBRX);
+Timer timer;
+
+
+void sine_wave()
+{
+    int t = 0;
+    float s;
+    AnalogOut a(PTE30);
+    while (1) { // sin(2 * PI * f * t / Fs)
+        s = sin(2 * PI * 1 * t / 100.0);
+        s = s/2 + .5;
+        a.write(s);
+        pc_sine.printf ("%f\n", s);
+        if (t == 100)
+            t = 0;
+        else
+            t++;
+        wait(0.01);
+    }
+}
+
+void sine_wave_read()
+{
+    AnalogIn a(PTB0);
+    while(1) {
+        pc_sine.printf("%f\n", a.read());
+        wait(0.01);
+    }
+}
+
+
+int main() {
+    sine_wave();
+
+    char c = pc_sine.getc();
+    
+    switch (c) {
+        case '1':sine_wave();
+            break;
+        case '2': sine_wave_read();
+            break;
+    }
+}