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

Committer:
gsteiert
Date:
2014-06-22
Revision:
1:03aeb304d3b3
Parent:
0:803011eae289
Child:
2:405cc6627ffb

File content as of revision 1:03aeb304d3b3:

#include "mbed.h"
#include "MAX14661.h"

MAX14661 mux(D14, D15);
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()
{
    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; }
    }
}