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

main.cpp@8:fb192510004d, 2016-04-08 (annotated)

Committer:: switches
Date:: Fri Apr 08 22:21:11 2016 +0000
Revision:: 8:fb192510004d
Parent:: 7:0a59d9e914f3
Child:: 9:22f6995ab785

Added MAX32600MBED to list of tested boards

Who changed what in which revision?

User	Revision	Line number	New 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:
switches	8:fb192510004d	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
switches	5:b39bfe8e3d09	19	* ST Nucleo L152RE/F401RE (B row only, single LED, inverted)
switches	5:b39bfe8e3d09	20	* LPCXpresso1549
gsteiert	2:405cc6627ffb	21	*
gsteiert	2:405cc6627ffb	22	* Some boards use D13 for an LED signal, so this example uses the second
gsteiert	2:405cc6627ffb	23	* row (row B, pins 7 through 12) of the Pmod connector.
gsteiert	2:405cc6627ffb	24	*/
gsteiert	2:405cc6627ffb	25
gsteiert	0:803011eae289	26	#include "mbed.h"
switches	5:b39bfe8e3d09	27	#include "ard2pmod.h"
gsteiert	0:803011eae289	28
gsteiert	1:03aeb304d3b3	29	I2C i2c(D14, D15);
gsteiert	2:405cc6627ffb	30	DigitalOut tog(LED1);
gsteiert	2:405cc6627ffb	31	DigitalOut als(LED2);
gsteiert	2:405cc6627ffb	32	DigitalOut dly(LED3);
gsteiert	1:03aeb304d3b3	33	DigitalIn pb3(D6); // Set as input to remove load from PB3
gsteiert	1:03aeb304d3b3	34	DigitalIn pb4(D7); // Set as input to remove load from PB4
switches	5:b39bfe8e3d09	35	DigitalIn pa3(D12); // Set as input to remove load from PA3
switches	5:b39bfe8e3d09	36	DigitalIn pa4(D13); // Set as input to remove load from PA4
gsteiert	1:03aeb304d3b3	37
gsteiert	1:03aeb304d3b3	38	const int alsAddr = 0x94;
gsteiert	4:226ef11c3ef4	39	const int alsLim = 0x0008;
gsteiert	0:803011eae289	40
gsteiert	0:803011eae289	41	int main()
gsteiert	0:803011eae289	42	{
switches	7:0a59d9e914f3	43	Ard2Pmod ard2pmod(Ard2Pmod::PMOD_TYPE_I2C_B); // Configure ard2pmod multiplexer for I2C
gsteiert	1:03aeb304d3b3	44	char cmd[2];
gsteiert	4:226ef11c3ef4	45	int alsData;
gsteiert	1:03aeb304d3b3	46
gsteiert	1:03aeb304d3b3	47	cmd[0] = 0x02; // Receive Register
gsteiert	4:226ef11c3ef4	48	cmd[1] = 0xFC; // 1.56ms, 1x
gsteiert	1:03aeb304d3b3	49	i2c.write(alsAddr, cmd, 2);
gsteiert	1:03aeb304d3b3	50
gsteiert	1:03aeb304d3b3	51	cmd[0] = 0x03; // Transmit Register
gsteiert	1:03aeb304d3b3	52	cmd[1] = 0x0F; // 110mA
gsteiert	1:03aeb304d3b3	53	i2c.write(alsAddr, cmd, 2);
gsteiert	1:03aeb304d3b3	54
gsteiert	1:03aeb304d3b3	55	cmd[0] = 0x01; // Config Register
gsteiert	1:03aeb304d3b3	56	cmd[1] = 0x10; // ALS/Prox Mode
gsteiert	1:03aeb304d3b3	57	i2c.write(alsAddr, cmd, 2);
gsteiert	1:03aeb304d3b3	58
gsteiert	1:03aeb304d3b3	59	bool lastProx = false;
gsteiert	1:03aeb304d3b3	60	int offDelay = 0;
gsteiert	2:405cc6627ffb	61	tog = false;
gsteiert	2:405cc6627ffb	62	als = false;
gsteiert	2:405cc6627ffb	63	dly = false;
gsteiert	1:03aeb304d3b3	64
gsteiert	1:03aeb304d3b3	65	while (true) {
gsteiert	1:03aeb304d3b3	66	wait (0.02);
gsteiert	4:226ef11c3ef4	67	cmd[0] = 0x05; // ALS Data Register Low
gsteiert	4:226ef11c3ef4	68	i2c.write(alsAddr, cmd, 1, true);
gsteiert	1:03aeb304d3b3	69	i2c.read(alsAddr, cmd, 1);
gsteiert	4:226ef11c3ef4	70	alsData = cmd[0];
gsteiert	4:226ef11c3ef4	71	als = (alsData < alsLim);
gsteiert	1:03aeb304d3b3	72
gsteiert	1:03aeb304d3b3	73	cmd[0] = 0x16; // Prox Data Register
gsteiert	4:226ef11c3ef4	74	i2c.write(alsAddr, cmd, 1, true);
gsteiert	1:03aeb304d3b3	75	i2c.read(alsAddr, cmd, 1);
gsteiert	1:03aeb304d3b3	76	if (cmd[0]) {
gsteiert	1:03aeb304d3b3	77	if (!lastProx) {
gsteiert	2:405cc6627ffb	78	tog = !tog;
gsteiert	1:03aeb304d3b3	79	}
gsteiert	1:03aeb304d3b3	80	lastProx = true;
gsteiert	1:03aeb304d3b3	81	offDelay = 250;
gsteiert	2:405cc6627ffb	82	dly = false;
gsteiert	1:03aeb304d3b3	83	} else {
gsteiert	1:03aeb304d3b3	84	lastProx = false;
gsteiert	1:03aeb304d3b3	85	}
gsteiert	1:03aeb304d3b3	86	if (offDelay > 0) { offDelay -= 1; }
gsteiert	2:405cc6627ffb	87	else { dly = true; }
gsteiert	1:03aeb304d3b3	88	}
gsteiert	0:803011eae289	89	}