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mikroSDK Library

Light Temp click

Rating:

5

Author: MIKROE

Last Updated: 2019-03-21

Package Version: 1.0.0.0

mikroSDK Library: 1.0.0.0

Category: Buck

Downloaded: 4366 times

Not followed.

License: MIT license  

Light Temp Click is a dual-channel LED driver, designed to be used in tunable Smart Connected Lighting (SCL) applications. It is based on the AL1782, a dual-channel PWM dimmable linear LED driver.

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  • mikroSDK Library 2.0.0.0
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mikroSDK Library Blog

 Light Temp Click

Light Temp Click

Native view of the Light Temp Click board.

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Light Temp Click

Light Temp Click

Front and back view of the Light Temp Click board.

View full image

Library Description

Library provides full control of the illumination for 2 LEDs. PWM functions are used to control the brightness temperature of the LEDs. The library also offers reading the current PG voltage score that serves to regulate lights and alerts.

Key functions:

  • uint16_t lighttemp_getPGVoltage() - Reads PG output voltage.
  • uint32_t lighttemp_pwmInit(uint8_t ledNum, uint16_t freq) - PWM init functions.
  • void lighttemp_pwmSetDuty(uint8_t ledNum, uint16_t duty) - PWM set duty cycle.

Examples description

The application is composed of the three sections :

  • System Initialization - Initialization I2C module, sets INT pin as INPUT, PWM pin and CS pin as OUTPUT
  • Application Initialization - Initialization driver init and pwm init for all LED's
  • Application Task - Waits for valid user input and executes functions based on set of valid commands

Commands : '+' - Increase LED's light '-' - Decrease LED's light '1' - Set LED 1 on the active '2' - Set LED 2 on the active 'v' - Display current PG voltage

void applicationTask()
{
    uint8_t dataReady_;
    char receivedData_;

    dataReady_ = UART_Rdy_Ptr( );

    if (dataReady_ != 0)
    {
        receivedData_ = UART_Rd_Ptr( );

        switch (receivedData_)
        {
            case '+' :
            {
                _increase();
                break;
            }
            case '-' :
            {
                _decrease();
                break;
            }
            case '1' :
            {
                _ledActive = 1;
                mikrobus_logWrite( ">>> Active LED 1 ", _LOG_LINE );
                break;
            }
            case '2' :
            {
                _ledActive = 2;
                mikrobus_logWrite( ">>> Active LED 2 ", _LOG_LINE );
                break;
            }
            case 'v' :
            {
                _currentPGVoltage();
                break;
            }
        }
    }
}

Additional Functions :

  • void _increase( ) - Increase LED's light
  • void _decrease( ) - Decrease LED's light
  • void _currentPGVoltage( ) - Reads and logs PG voltage

Other mikroE Libraries used in the example:

  • I2C
  • PWM
  • UART

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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