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:: 1:03aeb304d3b3
Parent:: 0:803011eae289
Child:: 2:405cc6627ffb

--- a/main.cpp	Sat Apr 26 03:37:00 2014 +0000
+++ b/main.cpp	Sun Jun 22 23:04:51 2014 +0000
@@ -2,14 +2,70 @@
 #include "MAX14661.h"
 
 MAX14661 mux(D14, D15);
-DigitalOut pinRTS(D13);
-DigitalIn pinRX(D0);  // Set as input to remove load from mbedTX 
-DigitalIn pinTX(D1);  // Set as input to remove load from mbedRX
+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
+DigitalIn pb3(D6);  // Set as input to remove load from PB3
+DigitalIn pb4(D7);  // Set as input to remove load from PB4
+
+const int alsAddr = 0x94;
+const char alsLim = 0x01;
 
 int main()
 {
-    pinRTS=0; // Not Ready to Send
-    //           D0 (mbedTX)   +   PA2 (TXD)         D1 (mbedRX)   +   PA3 (RXD)
-    mux.setAB((MAX14661::SW01 | MAX14661::SW13), (MAX14661::SW02 | MAX14661::SW12));
-    pinRTS=1; // Ready to Send
+    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)
+    mux.setAB((MAX14661::SW10 | MAX14661::SW08),
+              (MAX14661::SW09 | MAX14661::SW07));
+
+    cmd[0] = 0x02;  // Receive Register
+    cmd[1] = 0xFF;  // 1.56ms, 128x
+    i2c.write(alsAddr, cmd, 2);
+
+    cmd[0] = 0x03;  // Transmit Register
+    cmd[1] = 0x0F;  // 110mA
+    i2c.write(alsAddr, cmd, 2);
+    
+    cmd[0] = 0x01;  // Config Register
+    cmd[1] = 0x10;  // ALS/Prox Mode
+    i2c.write(alsAddr, cmd, 2);
+
+    bool lastProx = false;
+    int offDelay = 0;
+    r = false;
+    g = false;
+    b = 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);
+
+        cmd[0] = 0x16; // Prox Data Register
+        i2c.write(alsAddr, cmd, 1);
+        i2c.read(alsAddr, cmd, 1);
+        if (cmd[0]) {
+            if (!lastProx) {
+                r = !r;
+            }
+            lastProx = true;
+            offDelay = 250;
+            b = false;
+        } else {
+            lastProx = false;
+        }
+        if (offDelay > 0) { offDelay -= 1; }
+        else { b = true; }
+    }
 }
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