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mikroSDK Library

Smoke click

Rating:

6

Author: MikroElektronika Team

Last Updated: 2019-05-17

Category: Measurement

Downloaded: 1052 times

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Smoke click carries the MAX30105 high-sensitivity optical sensor for smoke detection. The click is designed to run on either 3.3V or 5V power supply. It communicates with the target MCU over I2C interface with additional functionality provided by the INT pin on the mikroBUS line.

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mikroSDK Library Blog

Smoke click

Smoke click

Native view of the Smoke click board.

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Smoke click

Smoke click

Front and back view of the Smoke click board.

View full image

Library Description

The library covers all the necessary functions that enables the usage of the Smoke Click board. It initializes and defines the I2C bus driver and drivers that offer a choice for writing and reading and setting a new value. Also, user can set, clear or check many different interrupts, as well as read and write into and from FIFO register.

Key functions:

  • void smoke_enableDataRdy() - Function is used to enable FIFO data ready interrupt.
  • uint32_t smoke_getGreenVal() - Function is used to read the oldest Green value.
  • void smoke_readFifoData( uint32_t *redRes, uint32_t *irRes, uint32_t *grnRes ) - Function is used to burst read the FIFO register.

Examples description

The application is composed of the three sections :

  • System Initialization - Initializes I2C module, LOG and GPIO structures, sets RST, CS and PWM pins as output.
  • Application Initialization - Initalizes I2C driver, applies "set registers check green values" settings, "enable FIFO data ready interrupt" and makes an initial log.
  • Application Task - (code snippet) This example demonstrates the use of Smoke Click board. It reads reflected green values and temperature from an internal sensor and displays the results on USART terminal. It usualy takes two or three readings in order to get corect readings. Expect big values when you do.
void applicationTask( )
{
    if( smoke_getInt1() & 0x40 )
    grnVal = smoke_getGreenVal();
    
    LongWordToStr( grnVal, logTxt );
    Ltrim( logTxt );
    mikrobus_logWrite( "GREEN LED Pulse Amplitude : ", _LOG_TEXT );
    mikrobus_logWrite( logTxt, _LOG_LINE );
    mikrobus_logWrite( "------------------------------", _LOG_LINE );
    
    temperature = smoke_readTempC();
    FloatToStr( temperature, logTxt );
    Ltrim( logTxt );
    
    mikrobus_logWrite( "Read Temperature : ", _LOG_TEXT );
    mikrobus_logWrite( logTxt, _LOG_TEXT );
    mikrobus_logWrite( degCel, _LOG_LINE );
    mikrobus_logWrite( "------------------------------", _LOG_LINE );
    mikrobus_logWrite( "______________________________", _LOG_LINE );
}

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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