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@1:03aeb304d3b3, 2014-06-22 (annotated)

Committer:
gsteiert
Date:
Sun Jun 22 23:04:51 2014 +0000
Revision:
1:03aeb304d3b3
Parent:
0:803011eae289
Child:
2:405cc6627ffb
Includes support for dual row, but commented out.;

Who changed what in which revision?

UserRevisionLine numberNew contents of line
gsteiert 0:803011eae289 1 #include "mbed.h"
gsteiert 0:803011eae289 2 #include "MAX14661.h"
gsteiert 0:803011eae289 3
gsteiert 0:803011eae289 4 MAX14661 mux(D14, D15);
gsteiert 1:03aeb304d3b3 5 I2C i2c(D14, D15);
gsteiert 1:03aeb304d3b3 6 DigitalOut r(LED1);
gsteiert 1:03aeb304d3b3 7 DigitalOut g(LED2);
gsteiert 1:03aeb304d3b3 8 DigitalOut b(LED3);
gsteiert 1:03aeb304d3b3 9 //DigitalIn pa3(D12); // Set as input to remove load from PA3
gsteiert 1:03aeb304d3b3 10 //DigitalIn pa4(D13); // Set as input to remove load from PA4
gsteiert 1:03aeb304d3b3 11 DigitalIn pb3(D6); // Set as input to remove load from PB3
gsteiert 1:03aeb304d3b3 12 DigitalIn pb4(D7); // Set as input to remove load from PB4
gsteiert 1:03aeb304d3b3 13
gsteiert 1:03aeb304d3b3 14 const int alsAddr = 0x94;
gsteiert 1:03aeb304d3b3 15 const char alsLim = 0x01;
gsteiert 0:803011eae289 16
gsteiert 0:803011eae289 17 int main()
gsteiert 0:803011eae289 18 {
gsteiert 1:03aeb304d3b3 19 char cmd[2];
gsteiert 1:03aeb304d3b3 20
gsteiert 1:03aeb304d3b3 21 /* // SDA(D14) + PA4(D13) + PB4(D7) , SCL(D15) + PA3(D12) + PB3(D6)
gsteiert 1:03aeb304d3b3 22 mux.setAB((MAX14661::SW10 | MAX14661::SW11 | MAX14661::SW08),
gsteiert 1:03aeb304d3b3 23 (MAX14661::SW09 | MAX14661::SW12 | MAX14661::SW07));
gsteiert 1:03aeb304d3b3 24 */
gsteiert 1:03aeb304d3b3 25
gsteiert 1:03aeb304d3b3 26 // SDA (D14) + PB4 (D7) SCL (D15) + PB3 (D6)
gsteiert 1:03aeb304d3b3 27 mux.setAB((MAX14661::SW10 | MAX14661::SW08),
gsteiert 1:03aeb304d3b3 28 (MAX14661::SW09 | MAX14661::SW07));
gsteiert 1:03aeb304d3b3 29
gsteiert 1:03aeb304d3b3 30 cmd[0] = 0x02; // Receive Register
gsteiert 1:03aeb304d3b3 31 cmd[1] = 0xFF; // 1.56ms, 128x
gsteiert 1:03aeb304d3b3 32 i2c.write(alsAddr, cmd, 2);
gsteiert 1:03aeb304d3b3 33
gsteiert 1:03aeb304d3b3 34 cmd[0] = 0x03; // Transmit Register
gsteiert 1:03aeb304d3b3 35 cmd[1] = 0x0F; // 110mA
gsteiert 1:03aeb304d3b3 36 i2c.write(alsAddr, cmd, 2);
gsteiert 1:03aeb304d3b3 37
gsteiert 1:03aeb304d3b3 38 cmd[0] = 0x01; // Config Register
gsteiert 1:03aeb304d3b3 39 cmd[1] = 0x10; // ALS/Prox Mode
gsteiert 1:03aeb304d3b3 40 i2c.write(alsAddr, cmd, 2);
gsteiert 1:03aeb304d3b3 41
gsteiert 1:03aeb304d3b3 42 bool lastProx = false;
gsteiert 1:03aeb304d3b3 43 int offDelay = 0;
gsteiert 1:03aeb304d3b3 44 r = false;
gsteiert 1:03aeb304d3b3 45 g = false;
gsteiert 1:03aeb304d3b3 46 b = false;
gsteiert 1:03aeb304d3b3 47
gsteiert 1:03aeb304d3b3 48 while (true) {
gsteiert 1:03aeb304d3b3 49 wait (0.02);
gsteiert 1:03aeb304d3b3 50 cmd[0] = 0x04; // ALS Data Register
gsteiert 1:03aeb304d3b3 51 i2c.write(alsAddr, cmd, 1);
gsteiert 1:03aeb304d3b3 52 i2c.read(alsAddr, cmd, 1);
gsteiert 1:03aeb304d3b3 53 g = (cmd[0] < alsLim);
gsteiert 1:03aeb304d3b3 54
gsteiert 1:03aeb304d3b3 55 cmd[0] = 0x16; // Prox Data Register
gsteiert 1:03aeb304d3b3 56 i2c.write(alsAddr, cmd, 1);
gsteiert 1:03aeb304d3b3 57 i2c.read(alsAddr, cmd, 1);
gsteiert 1:03aeb304d3b3 58 if (cmd[0]) {
gsteiert 1:03aeb304d3b3 59 if (!lastProx) {
gsteiert 1:03aeb304d3b3 60 r = !r;
gsteiert 1:03aeb304d3b3 61 }
gsteiert 1:03aeb304d3b3 62 lastProx = true;
gsteiert 1:03aeb304d3b3 63 offDelay = 250;
gsteiert 1:03aeb304d3b3 64 b = false;
gsteiert 1:03aeb304d3b3 65 } else {
gsteiert 1:03aeb304d3b3 66 lastProx = false;
gsteiert 1:03aeb304d3b3 67 }
gsteiert 1:03aeb304d3b3 68 if (offDelay > 0) { offDelay -= 1; }
gsteiert 1:03aeb304d3b3 69 else { b = true; }
gsteiert 1:03aeb304d3b3 70 }
gsteiert 0:803011eae289 71 }