MAX44000PMB1 Demonstration

Diff: main.cpp

Revision:

2:405cc6627ffb

Parent:

1:03aeb304d3b3

Child:

3:61cc32322303

diff -r 03aeb304d3b3 -r 405cc6627ffb main.cpp
--- a/main.cpp	Sun Jun 22 23:04:51 2014 +0000
+++ b/main.cpp	Mon Jun 23 05:03:54 2014 +0000
@@ -1,13 +1,32 @@
+/* MAX44000 Ambient Light Sensor / Proximity Sensor Demo
+ * This demonstrates some of the capabilities of the MAX44000.
+ * 
+ * This is written to work with the ARD2PMD adapter board and 
+ * the MAX44000PMB1.  It uses the standard Arduino pin names 
+ * and it will compile for most arduino form-factor mbed boards.
+ *
+ * LED1 toggles when something is first detected by the proximity sensor.
+ * LED2 indicates when the Ambient Light Sensor reads grater than alsLim.
+ * LED3 will stay on whenever something is detected by the proximity sensor 
+ *   and stay on for an additional 5s after it is no longer detected.
+ *
+ * The following boards have been tested to work:
+ *   FRDM-KL25Z, FRDM-K64F
+ *   Seeeduino Arch and Arch Pro (LEDs inverted)
+ *   ST Nucleo F401RE (only one LED)
+ *  
+ * Some boards use D13 for an LED signal, so this example uses the second 
+ *   row (row B, pins 7 through 12) of the Pmod connector.  
+ */
+
 #include "mbed.h"
 #include "MAX14661.h"
 
 MAX14661 mux(D14, D15);
 I2C i2c(D14, D15);
-DigitalOut r(LED1);
-DigitalOut g(LED2);
-DigitalOut b(LED3);
-//DigitalIn pa3(D12);  // Set as input to remove load from PA3
-//DigitalIn pa4(D13);  // Set as input to remove load from PA4
+DigitalOut tog(LED1);
+DigitalOut als(LED2);
+DigitalOut dly(LED3);
 DigitalIn pb3(D6);  // Set as input to remove load from PB3
 DigitalIn pb4(D7);  // Set as input to remove load from PB4
 
@@ -18,12 +37,7 @@
 {
     char cmd[2];
 
-/*    //  SDA(D14) + PA4(D13) + PB4(D7)  ,  SCL(D15) + PA3(D12) + PB3(D6)
-    mux.setAB((MAX14661::SW10 | MAX14661::SW11 | MAX14661::SW08),
-              (MAX14661::SW09 | MAX14661::SW12 | MAX14661::SW07));
-*/
-
-    //           SDA (D14)   +   PB4 (D7)         SCL (D15)   +   PB3 (D6)
+    //  SDA (D14) + PB4 (D7)     SCL (D15) + PB3 (D6)
     mux.setAB((MAX14661::SW10 | MAX14661::SW08),
               (MAX14661::SW09 | MAX14661::SW07));
 
@@ -41,31 +55,31 @@
 
     bool lastProx = false;
     int offDelay = 0;
-    r = false;
-    g = false;
-    b = false;
+    tog = false;
+    als = false;
+    dly = false;
 
     while (true) {
         wait (0.02);
         cmd[0] = 0x04; // ALS Data Register
         i2c.write(alsAddr, cmd, 1);
         i2c.read(alsAddr, cmd, 1);
-        g = (cmd[0] < alsLim);
+        als = (cmd[0] < alsLim);
 
         cmd[0] = 0x16; // Prox Data Register
         i2c.write(alsAddr, cmd, 1);
         i2c.read(alsAddr, cmd, 1);
         if (cmd[0]) {
             if (!lastProx) {
-                r = !r;
+                tog = !tog;
             }
             lastProx = true;
             offDelay = 250;
-            b = false;
+            dly = false;
         } else {
             lastProx = false;
         }
         if (offDelay > 0) { offDelay -= 1; }
-        else { b = true; }
+        else { dly = true; }
     }
 }
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