Maxim Integrated / Mbed 2 deprecated MAX44000PMB1_Demo

Demonstrates the MAX44000 library and some of the features of the MAX44000

Dependencies:   MAX44000 ard2pmod mbed

Fork of ALS_ARD2PMOD_Demo by Maxim Integrated

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

Links to external supporting material

main.cpp@2:405cc6627ffb, 2014-06-23 (annotated)

Committer:
gsteiert
Date:
Mon Jun 23 05:03:54 2014 +0000
Revision:
2:405cc6627ffb
Parent:
1:03aeb304d3b3
Child:
3:61cc32322303
Publishing ALS Proximity Demo

Who changed what in which revision?

UserRevisionLine numberNew contents of line
gsteiert 2:405cc6627ffb 1 /* MAX44000 Ambient Light Sensor / Proximity Sensor Demo
gsteiert 2:405cc6627ffb 2 * This demonstrates some of the capabilities of the MAX44000.
gsteiert 2:405cc6627ffb 3 *
gsteiert 2:405cc6627ffb 4 * This is written to work with the ARD2PMD adapter board and
gsteiert 2:405cc6627ffb 5 * the MAX44000PMB1. It uses the standard Arduino pin names
gsteiert 2:405cc6627ffb 6 * and it will compile for most arduino form-factor mbed boards.
gsteiert 2:405cc6627ffb 7 *
gsteiert 2:405cc6627ffb 8 * LED1 toggles when something is first detected by the proximity sensor.
gsteiert 2:405cc6627ffb 9 * LED2 indicates when the Ambient Light Sensor reads grater than alsLim.
gsteiert 2:405cc6627ffb 10 * LED3 will stay on whenever something is detected by the proximity sensor
gsteiert 2:405cc6627ffb 11 * and stay on for an additional 5s after it is no longer detected.
gsteiert 2:405cc6627ffb 12 *
gsteiert 2:405cc6627ffb 13 * The following boards have been tested to work:
gsteiert 2:405cc6627ffb 14 * FRDM-KL25Z, FRDM-K64F
gsteiert 2:405cc6627ffb 15 * Seeeduino Arch and Arch Pro (LEDs inverted)
gsteiert 2:405cc6627ffb 16 * ST Nucleo F401RE (only one LED)
gsteiert 2:405cc6627ffb 17 *
gsteiert 2:405cc6627ffb 18 * Some boards use D13 for an LED signal, so this example uses the second
gsteiert 2:405cc6627ffb 19 * row (row B, pins 7 through 12) of the Pmod connector.
gsteiert 2:405cc6627ffb 20 */
gsteiert 2:405cc6627ffb 21
gsteiert 0:803011eae289 22 #include "mbed.h"
gsteiert 0:803011eae289 23 #include "MAX14661.h"
gsteiert 0:803011eae289 24
gsteiert 0:803011eae289 25 MAX14661 mux(D14, D15);
gsteiert 1:03aeb304d3b3 26 I2C i2c(D14, D15);
gsteiert 2:405cc6627ffb 27 DigitalOut tog(LED1);
gsteiert 2:405cc6627ffb 28 DigitalOut als(LED2);
gsteiert 2:405cc6627ffb 29 DigitalOut dly(LED3);
gsteiert 1:03aeb304d3b3 30 DigitalIn pb3(D6); // Set as input to remove load from PB3
gsteiert 1:03aeb304d3b3 31 DigitalIn pb4(D7); // Set as input to remove load from PB4
gsteiert 1:03aeb304d3b3 32
gsteiert 1:03aeb304d3b3 33 const int alsAddr = 0x94;
gsteiert 1:03aeb304d3b3 34 const char alsLim = 0x01;
gsteiert 0:803011eae289 35
gsteiert 0:803011eae289 36 int main()
gsteiert 0:803011eae289 37 {
gsteiert 1:03aeb304d3b3 38 char cmd[2];
gsteiert 1:03aeb304d3b3 39
gsteiert 2:405cc6627ffb 40 // SDA (D14) + PB4 (D7) SCL (D15) + PB3 (D6)
gsteiert 1:03aeb304d3b3 41 mux.setAB((MAX14661::SW10 | MAX14661::SW08),
gsteiert 1:03aeb304d3b3 42 (MAX14661::SW09 | MAX14661::SW07));
gsteiert 1:03aeb304d3b3 43
gsteiert 1:03aeb304d3b3 44 cmd[0] = 0x02; // Receive Register
gsteiert 1:03aeb304d3b3 45 cmd[1] = 0xFF; // 1.56ms, 128x
gsteiert 1:03aeb304d3b3 46 i2c.write(alsAddr, cmd, 2);
gsteiert 1:03aeb304d3b3 47
gsteiert 1:03aeb304d3b3 48 cmd[0] = 0x03; // Transmit Register
gsteiert 1:03aeb304d3b3 49 cmd[1] = 0x0F; // 110mA
gsteiert 1:03aeb304d3b3 50 i2c.write(alsAddr, cmd, 2);
gsteiert 1:03aeb304d3b3 51
gsteiert 1:03aeb304d3b3 52 cmd[0] = 0x01; // Config Register
gsteiert 1:03aeb304d3b3 53 cmd[1] = 0x10; // ALS/Prox Mode
gsteiert 1:03aeb304d3b3 54 i2c.write(alsAddr, cmd, 2);
gsteiert 1:03aeb304d3b3 55
gsteiert 1:03aeb304d3b3 56 bool lastProx = false;
gsteiert 1:03aeb304d3b3 57 int offDelay = 0;
gsteiert 2:405cc6627ffb 58 tog = false;
gsteiert 2:405cc6627ffb 59 als = false;
gsteiert 2:405cc6627ffb 60 dly = false;
gsteiert 1:03aeb304d3b3 61
gsteiert 1:03aeb304d3b3 62 while (true) {
gsteiert 1:03aeb304d3b3 63 wait (0.02);
gsteiert 1:03aeb304d3b3 64 cmd[0] = 0x04; // ALS Data Register
gsteiert 1:03aeb304d3b3 65 i2c.write(alsAddr, cmd, 1);
gsteiert 1:03aeb304d3b3 66 i2c.read(alsAddr, cmd, 1);
gsteiert 2:405cc6627ffb 67 als = (cmd[0] < alsLim);
gsteiert 1:03aeb304d3b3 68
gsteiert 1:03aeb304d3b3 69 cmd[0] = 0x16; // Prox Data Register
gsteiert 1:03aeb304d3b3 70 i2c.write(alsAddr, cmd, 1);
gsteiert 1:03aeb304d3b3 71 i2c.read(alsAddr, cmd, 1);
gsteiert 1:03aeb304d3b3 72 if (cmd[0]) {
gsteiert 1:03aeb304d3b3 73 if (!lastProx) {
gsteiert 2:405cc6627ffb 74 tog = !tog;
gsteiert 1:03aeb304d3b3 75 }
gsteiert 1:03aeb304d3b3 76 lastProx = true;
gsteiert 1:03aeb304d3b3 77 offDelay = 250;
gsteiert 2:405cc6627ffb 78 dly = false;
gsteiert 1:03aeb304d3b3 79 } else {
gsteiert 1:03aeb304d3b3 80 lastProx = false;
gsteiert 1:03aeb304d3b3 81 }
gsteiert 1:03aeb304d3b3 82 if (offDelay > 0) { offDelay -= 1; }
gsteiert 2:405cc6627ffb 83 else { dly = true; }
gsteiert 1:03aeb304d3b3 84 }
gsteiert 0:803011eae289 85 }