MAX44000PMB1 Demonstration

This demonstrates some of the capabilities of the MAX44000. This is written to work with the MAXREFDES72# adapter board and the MAX44000PMB1 peripheral module. It uses the standard Arduino pin names and it will compile for most arduino form-factor mbed boards. /media/uploads/switches/max44000pmb1_demo.jpg To run this demonstration you will need:

In this demonstration the LEDs are changed based on data from the sensor.

LED1 toggles when something is first detected by the proximity sensor.
LED2 indicates when the Ambient Light Sensor reads greater than a set value (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.

Note: 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. /media/uploads/switches/max44000_align.jpg

Tested platform boards

MAX32600MBED

Links to external supporting material

Diff: main.cpp

Revision:: 4:226ef11c3ef4
Parent:: 3:61cc32322303
Child:: 5:b39bfe8e3d09

--- a/main.cpp	Mon Jun 23 05:30:26 2014 +0000
+++ b/main.cpp	Mon Jun 30 22:32:02 2014 +0000
@@ -33,18 +33,19 @@
 DigitalIn pb4(D7);  // Set as input to remove load from PB4
 
 const int alsAddr = 0x94;
-const char alsLim = 0x01;
+const int alsLim = 0x0008;
 
 int main()
 {
     char cmd[2];
+    int alsData;
 
     //  SDA (D14) + PB4 (D7)     SCL (D15) + PB3 (D6)
     mux.setAB((MAX14661::SW10 | MAX14661::SW08),
               (MAX14661::SW09 | MAX14661::SW07));
 
     cmd[0] = 0x02;  // Receive Register
-    cmd[1] = 0xFF;  // 1.56ms, 128x
+    cmd[1] = 0xFC;  // 1.56ms, 1x
     i2c.write(alsAddr, cmd, 2);
 
     cmd[0] = 0x03;  // Transmit Register
@@ -63,13 +64,14 @@
 
     while (true) {
         wait (0.02);
-        cmd[0] = 0x04; // ALS Data Register
-        i2c.write(alsAddr, cmd, 1);
+        cmd[0] = 0x05; // ALS Data Register Low
+        i2c.write(alsAddr, cmd, 1, true);
         i2c.read(alsAddr, cmd, 1);
-        als = (cmd[0] < alsLim);
+        alsData = cmd[0];
+        als = (alsData < alsLim);
 
         cmd[0] = 0x16; // Prox Data Register
-        i2c.write(alsAddr, cmd, 1);
+        i2c.write(alsAddr, cmd, 1, true);
         i2c.read(alsAddr, cmd, 1);
         if (cmd[0]) {
             if (!lastProx) {