Demonstrates the MAX44000 library and some of the features of the MAX44000
Dependencies: MAX44000 ard2pmod mbed
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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. To run this demonstration you will need:
- MAX44000PMB1 Ambient Light / Proximity Sensor Peripheral Module
- MAXREFDES72# Pmod Adapter for Arduino Platforms
- An mbed enabled board with an Arduino compatible socket. We recommend the MAX32600MBED
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.
Tested platform boards
Links to external supporting material
- MAX44000PMB1 Ambient Light / Proximity Sensor Peripheral Module
- MAXREFDES72# Pmod Adapter for Arduino Platforms
- MAX32600MBED
main.cpp
- Committer:
- gsteiert
- Date:
- 2014-06-30
- Revision:
- 4:226ef11c3ef4
- Parent:
- 3:61cc32322303
- Child:
- 5:b39bfe8e3d09
File content as of revision 4:226ef11c3ef4:
/* MAX44000 Ambient Light Sensor / Proximity Sensor Demo * 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. * * 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: * FRDM-KL25Z * FRDM-K64F * Seeeduino Arch (LEDs inverted) * Seeeduino Arch Pro * ST Nucleo F401RE (only one LED, inverted) * * 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. */ #include "mbed.h" #include "MAX14661.h" MAX14661 mux(D14, D15); I2C i2c(D14, D15); DigitalOut tog(LED1); DigitalOut als(LED2); DigitalOut dly(LED3); 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 int alsLim = 0x0008; int main() { char cmd[2]; int alsData; // 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] = 0xFC; // 1.56ms, 1x 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; tog = false; als = false; dly = false; while (true) { wait (0.02); cmd[0] = 0x05; // ALS Data Register Low i2c.write(alsAddr, cmd, 1, true); i2c.read(alsAddr, cmd, 1); alsData = cmd[0]; als = (alsData < alsLim); cmd[0] = 0x16; // Prox Data Register i2c.write(alsAddr, cmd, 1, true); i2c.read(alsAddr, cmd, 1); if (cmd[0]) { if (!lastProx) { tog = !tog; } lastProx = true; offDelay = 250; dly = false; } else { lastProx = false; } if (offDelay > 0) { offDelay -= 1; } else { dly = true; } } }