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mikroSDK Library

Proximity 7 click

Rating:

5

Author: MIKROE

Last Updated: 2019-03-28

Package Version: 1.0.0.0

mikroSDK Library: 1.0.0.0

Category: Optical

Downloaded: 3861 times

Not followed.

License: MIT license  

Proximity 7 Click is an advanced proximity and ambient light sensing Click board. It features the ADPS9930, a digital sensor IC equipped with two photodiodes (PD) and an IR LED, driven by a proprietary LED driver circuit.

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  • mikroSDK Library 2.0.0.0
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mikroSDK Library Blog

Proximity 7 click

Proximity 7 click

Native view of the Proximity 7 click board.

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Proximity 7 click

Proximity 7 click

Front and back view of the Proximity 7 click board.

View full image

Library Description

Library contains functions for setting and getting register content Library contains functions for setting proximity and als integraton times as well as wait time Library contains functions for setting proximity and als channel 0 low and high thresholds Library contains functions for setting proximity and asl interrupt persistances Library contains functions for setting proximity pulse count and proximity offset Library contains function for setting constants for Lux calculation Library contains functions for getting Lux level and Int pin status Library contains functions for getting Als data from channels 0 and 1 Library contains function for getting proximity data.

Key functions:

  • void proximity7_setRegister( uint8_t *writeBuffer_, uint8_t nRegisters_ ) - sets register(s) content.
  • float proximity7_getLuxLevel( void ) - calculates LUX level based on Ch0 and Ch1 data and constants set by setConstants(); - function.
  • void proximity7_setConstants( float glassAttenuation, float constantB, float constantC, float constantD, float deviceFactor ) - sets constants for LUX calculation.

Examples description

The application is composed of the three sections :

  • System Initialization - Initializes I2C and LOG and sets INT pin as INPUT.
  • Application Initialization - Initializes I2C driver and writes basic settings to device registers.
  • Application Task - Logs lux level and proximity data.

Note:

  • When setting LED drive strength please note that if "proximity drive level - PDL" bit in "configuration register" is set to 1, LED drive current values are reduced by 9.
  • When setting wait time note that if "wait long - WLONG" bit is set to 1, time is 12x longer. Therefore if WLONG == 1 set time between 33ms and 8386.56ms.
  • When setting ALS gain note that if "ALS gain level - AGL" bit is set to 1, ALS gains are scaled by 0.16, otherwise, they are scaled by 1.
void applicationTask( )
{
    proximity7_getRegister( &readBuffer[0], _PROXIMITY7_STATUS, _PROXIMITY7_REPEATED_BYTE, 1 );
    
    alsValid = readBuffer[0] & _PROXIMITY7_ALS_VALID_MASK;
    proximityValid = readBuffer[0] & _PROXIMITY7_PROXIMITY_VALID_MASK;
    
    if (alsValid != 0 && proximityValid != 0)
    {
        mikrobus_logWrite( " ", _LOG_LINE );

        luxLevel = proximity7_getLuxLevel( );
        FloatToStr( luxLevel, text );
        mikrobus_logWrite( "> > > Lux level   : ", _LOG_TEXT );
        mikrobus_logWrite( text, _LOG_TEXT );
        mikrobus_logWrite( " lx", _LOG_LINE );

        proximity = proximity7_getProximityData( );
        FloatToStr( proximity, text );
        mikrobus_logWrite( "> > > Proximity   : ", _LOG_TEXT );
        mikrobus_logWrite( text, _LOG_TEXT );

        writeBuffer[0] = _PROXIMITY7_SPECIAL_FUNCTION | _PROXIMITY7_PROXIMITY_AND_ALS_INT_CLEAR;
        proximity7_setRegister( &writeBuffer[0], 1 );
    }
    
    Delay_ms(300);
}

Other mikroE Libraries used in the example:

  • I2C
  • UART
  • Conversions

Additional notes and informations

Depending on the development board you are using, you may need USB UART clickUSB UART 2 click or RS232 click to connect to your PC, for development systems with no UART to USB interface available on the board. The terminal available in all MikroElektronika compilers, or any other terminal application of your choice, can be used to read the message.

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