ambient

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Ambient click

< Ambient click carries the Melexis MLX75305 IC. It’s a CMOS integrated optical sensor that consists of a photodiode, a transimpendance amplifier, and an output transistor. >

click Product page

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Click library

• Author : MikroE Team
• Date : Dec 2019.
• Type : ADC type

Software Support

We provide a library for the Ambient Click as well as a demo application (example), developed using MikroElektronika compilers. The demo can run on all the main MikroElektronika development boards.

Package can be downloaded/installed directly form compilers IDE(recommended way), or downloaded from our LibStock, or found on mikroE github account.

Library Description

This library contains API for Ambient Click driver.

Standard key functions :

• Config Object Initialization function.

void ambient_cfg_setup ( ambient_cfg_t *cfg );

• Initialization function.

AMBIENT_RETVAL ambient_init ( ambient_t *ctx, ambient_cfg_t *cfg );

Example key functions :

• Generic read function.

ambient_data_t ambient_generic_read ( ambient_t *ctx );

• Calculate light intensity function.

uint16_t ambient_calculate_light_intensity ( ambient_t *ctx, uint16_t adc_data, uint16_t vcc_val, uint16_t adc_res );

Examples Description

This application turns light intensity into voltage.

The demo application is composed of two sections :

Application Init

Initialization driver enables GPIO,initializationADC, also write log.

void application_init ( void )
{
 log_cfg_t log_cfg;
    ambient_cfg_t cfg;

    /** 
     * Logger initialization.
     * Default baud rate: 115200
     * Default log level: LOG_LEVEL_DEBUG
     * @note If USB_UART_RX and USB_UART_TX 
     * are defined as HAL_PIN_NC, you will 
     * need to define them manually for log to work. 
     * See @b LOG_MAP_USB_UART macro definition for detailed explanation.
     */
    LOG_MAP_USB_UART( log_cfg );
    log_init( &logger, &log_cfg );
    log_info( &logger, "---- Application Init ----" );

    //  Click initialization.

    ambient_cfg_setup( &cfg );
    AMBIENT_MAP_MIKROBUS( cfg, MIKROBUS_1 );
    ambient_init( &ambient, &cfg );

    log_printf( &logger, "      Initialization ADC      " );
    Delay_ms( 100 );
}
  

Application Task

This is an example which demonstrates the use of Ambient click board. Ambient click reads ADC value and converts to light intensity [ uW/cm2 ]. Results are being sent to the Usart Terminal where you can track their changes. All data logs on USB uart change for every 1 sec.

void application_task ( void )
{
ambient_data_t tmp;
    
    //  Task implementation.
    
    tmp = ambient_generic_read ( &ambient );
    light = ambient_calculate_light_intensity( &ambient, value_adc, AMBIENT_VCC_3_3, AMBIENT_RES_12_BIT );

    log_printf( &logger, "** ADC value : [DEC]- %d, [HEX]- 0x%x \r\n", tmp, tmp );
    log_printf( &logger, "Light Intensity: %d uW/cm2 \r\n",light );

    Delay_ms( 1000 );
}  

The full application code, and ready to use projects can be installed directly form compilers IDE(recommneded) or found on LibStock page or mikroE GitHub accaunt.

Other mikroE Libraries used in the example:

• MikroSDK.Board
• MikroSDK.Log
• Click.Ambient

Additional notes and informations

Depending on the development board you are using, you may need USB UART click, USB 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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