Revision 0:08f8dd6fd2e9, committed 2013-07-31

Comitter:

shimniok

Date:

Wed Jul 31 23:08:05 2013 +0000

Commit message:

Working revision, updated documentation with youtube video

Changed in this revision

diff -r 000000000000 -r 08f8dd6fd2e9 Beep.lib
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/Beep.lib	Wed Jul 31 23:08:05 2013 +0000
@@ -0,0 +1,1 @@
+http://mbed.org/users/shimniok/code/Beep/#3eb39e374fc3

diff -r 000000000000 -r 08f8dd6fd2e9 main.cpp
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/main.cpp	Wed Jul 31 23:08:05 2013 +0000
@@ -0,0 +1,64 @@
+#include "mbed.h"
+#include "Beep.h"
+
+/**
+ * Pseudo Theremin using Sharp IR Rangers + my A2D I2C adapters
+ *
+ * Demo Video: http://www.youtube.com/watch?v=6HEsA3RBoPc
+ * A2D adapters: https://code.google.com/p/bot-thoughts-sharpi2c/
+ *
+ * One ranger controls pitch, the other on/off.
+ * Simple PWM sound generation is used.  The output pin p22 feeds
+ * into a simple common-emitter BJT amplifier on my breadboard.
+ */
+DigitalOut myled(LED1);
+I2C i2c(p28, p27);       // sda, scl
+Serial pc(USBTX, USBRX); // tx, rx
+Timer t;
+Beep buzzer(p22);
+
+#define PITCH   0x26
+#define PITCHR  (PITCH<<1)|1
+#define PITCHW  (PITCH<<1)
+#define VOLUME  0x27
+
+int main() {
+    int p = 0;
+    int v = 0;
+    
+    i2c.frequency(100000);
+    pc.baud(115200);
+    pc.printf("Hello world!\n");
+    t.start();
+    t.reset();
+    
+    while(1) {
+        char data[3];
+        float range = 0.0;
+
+        pc.printf("%8u ", t.read_ms());
+
+        if ( i2c.read(VOLUME<<1, data, 2) != 0) {
+            pc.printf("~0x%02x ", VOLUME);
+        } else {
+            v = data[0]<<8 | data[1];
+            pc.printf("%03u %03u v=%u ", data[0], data[1], v);
+        }            
+
+        if ( i2c.read(PITCHR, data, 2) != 0) {
+            pc.printf("~0x%02x", PITCH);
+        } else {
+            p = data[0]<<8 | data[1];
+            if (v > 2300){
+                range = 500 + 500 * powf(4187.8 / p, 1.1060);
+                buzzer.beep(int(range));
+            } else {
+                buzzer.nobeep();
+            }
+            pc.printf("%03u %03u p=%u r=%f", data[0], data[1], p, range);
+        }
+        pc.printf("\n");
+
+        wait(0.005);
+    }
+}

diff -r 000000000000 -r 08f8dd6fd2e9 mbed.bld
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/mbed.bld	Wed Jul 31 23:08:05 2013 +0000
@@ -0,0 +1,1 @@
+http://mbed.org/users/mbed_official/code/mbed/builds/b3110cd2dd17
\ No newline at end of file