Greg Steiert / Mbed 2 deprecated ALS_Proximity_Demo

This demonstrates some of the capabilities of the MAX44000. It is written to work with the ARD2PMD adapter board and the MAX44000PMB1. It uses the standard Arduino pin names and will compile for most Arduino form-factor mbed boards.

Dependencies:   ard2pmod mbed

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.

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.

  • 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:

  • MAX32600MBED
  • FRDM-KL25Z
  • FRDM-K64F
  • Seeeduino Arch (LEDs inverted)
  • Seeeduino Arch Pro
  • ST Nucleo F401RE (only one LED, inverted)

main.cpp@5:2a360754fea6, 2016-04-08 (annotated)

Committer:
gsteiert
Date:
Fri Apr 08 22:37:02 2016 +0000
Revision:
5:2a360754fea6
Parent:
4:226ef11c3ef4 
Updated mbed library.  ; Replaced MAX14661 library with Ard2Pmod Library.  ; Added MAX32600MBED to list of tested boards.

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 5:2a360754fea6 14 * MAX32600MBED
gsteiert 3:61cc32322303 15 * FRDM-KL25Z
gsteiert 3:61cc32322303 16 * FRDM-K64F
gsteiert 3:61cc32322303 17 * Seeeduino Arch (LEDs inverted)
gsteiert 3:61cc32322303 18 * Seeeduino Arch Pro
gsteiert 3:61cc32322303 19 * ST Nucleo F401RE (only one LED, inverted)
gsteiert 2:405cc6627ffb 20 *
gsteiert 2:405cc6627ffb 21 * Some boards use D13 for an LED signal, so this example uses the second
gsteiert 2:405cc6627ffb 22 * row (row B, pins 7 through 12) of the Pmod connector.
gsteiert 2:405cc6627ffb 23 */
gsteiert 2:405cc6627ffb 24
gsteiert 0:803011eae289 25 #include "mbed.h"
gsteiert 5:2a360754fea6 26 #include "ard2pmod.h"
gsteiert 0:803011eae289 27
gsteiert 1:03aeb304d3b3 28 I2C i2c(D14, D15);
gsteiert 2:405cc6627ffb 29 DigitalOut tog(LED1);
gsteiert 2:405cc6627ffb 30 DigitalOut als(LED2);
gsteiert 2:405cc6627ffb 31 DigitalOut dly(LED3);
gsteiert 1:03aeb304d3b3 32 DigitalIn pb3(D6); // Set as input to remove load from PB3
gsteiert 1:03aeb304d3b3 33 DigitalIn pb4(D7); // Set as input to remove load from PB4
gsteiert 1:03aeb304d3b3 34
gsteiert 1:03aeb304d3b3 35 const int alsAddr = 0x94;
gsteiert 4:226ef11c3ef4 36 const int alsLim = 0x0008;
gsteiert 0:803011eae289 37
gsteiert 0:803011eae289 38 int main()
gsteiert 0:803011eae289 39 {
gsteiert 1:03aeb304d3b3 40 char cmd[2];
gsteiert 4:226ef11c3ef4 41 int alsData;
gsteiert 1:03aeb304d3b3 42
gsteiert 5:2a360754fea6 43 Ard2Pmod ard2pmd(Ard2Pmod::PMOD_TYPE_I2C_B); // Configure Ard2Pmod board for I2C on row B
gsteiert 1:03aeb304d3b3 44
gsteiert 1:03aeb304d3b3 45 cmd[0] = 0x02; // Receive Register
gsteiert 4:226ef11c3ef4 46 cmd[1] = 0xFC; // 1.56ms, 1x
gsteiert 1:03aeb304d3b3 47 i2c.write(alsAddr, cmd, 2);
gsteiert 1:03aeb304d3b3 48
gsteiert 1:03aeb304d3b3 49 cmd[0] = 0x03; // Transmit Register
gsteiert 1:03aeb304d3b3 50 cmd[1] = 0x0F; // 110mA
gsteiert 1:03aeb304d3b3 51 i2c.write(alsAddr, cmd, 2);
gsteiert 1:03aeb304d3b3 52
gsteiert 1:03aeb304d3b3 53 cmd[0] = 0x01; // Config Register
gsteiert 1:03aeb304d3b3 54 cmd[1] = 0x10; // ALS/Prox Mode
gsteiert 1:03aeb304d3b3 55 i2c.write(alsAddr, cmd, 2);
gsteiert 1:03aeb304d3b3 56
gsteiert 1:03aeb304d3b3 57 bool lastProx = false;
gsteiert 1:03aeb304d3b3 58 int offDelay = 0;
gsteiert 2:405cc6627ffb 59 tog = false;
gsteiert 2:405cc6627ffb 60 als = false;
gsteiert 2:405cc6627ffb 61 dly = false;
gsteiert 1:03aeb304d3b3 62
gsteiert 1:03aeb304d3b3 63 while (true) {
gsteiert 1:03aeb304d3b3 64 wait (0.02);
gsteiert 4:226ef11c3ef4 65 cmd[0] = 0x05; // ALS Data Register Low
gsteiert 4:226ef11c3ef4 66 i2c.write(alsAddr, cmd, 1, true);
gsteiert 1:03aeb304d3b3 67 i2c.read(alsAddr, cmd, 1);
gsteiert 4:226ef11c3ef4 68 alsData = cmd[0];
gsteiert 4:226ef11c3ef4 69 als = (alsData < alsLim);
gsteiert 1:03aeb304d3b3 70
gsteiert 1:03aeb304d3b3 71 cmd[0] = 0x16; // Prox Data Register
gsteiert 4:226ef11c3ef4 72 i2c.write(alsAddr, cmd, 1, true);
gsteiert 1:03aeb304d3b3 73 i2c.read(alsAddr, cmd, 1);
gsteiert 1:03aeb304d3b3 74 if (cmd[0]) {
gsteiert 1:03aeb304d3b3 75 if (!lastProx) {
gsteiert 2:405cc6627ffb 76 tog = !tog;
gsteiert 1:03aeb304d3b3 77 }
gsteiert 1:03aeb304d3b3 78 lastProx = true;
gsteiert 1:03aeb304d3b3 79 offDelay = 250;
gsteiert 2:405cc6627ffb 80 dly = false;
gsteiert 1:03aeb304d3b3 81 } else {
gsteiert 1:03aeb304d3b3 82 lastProx = false;
gsteiert 1:03aeb304d3b3 83 }
gsteiert 1:03aeb304d3b3 84 if (offDelay > 0) { offDelay -= 1; }
gsteiert 2:405cc6627ffb 85 else { dly = true; }
gsteiert 1:03aeb304d3b3 86 }
gsteiert 0:803011eae289 87 }