Library Description

The library covers all the necessary functions to control LED Driver 2 click board. LED Driver 2 click communicates with the target board via PWM module. This library contains drivers for PWM function: 
initialization, for sets duty ratio, starts and stops PWM module.

Key functions:

• leddriver2_gpioDriverInit( (T_LEDDRIVER_P)&_MIKROBUS1_GPIO ) - Function initializes GPIO driver for the desired MIKROBUS1.

Examples description

The application is composed of three sections:

• System Initialization - Initializes GPIO and LOG structures, PWM pins as output and starts to write log.
• Application Initialization -  Initialization driver enables - GPIO, PWM initialization set PWM duty cycle and PWM frequency and start PWM.
• Application Task - (code snippet) This is an example which demonstrates the use of LED Driver 2 click board. LED Driver 2 click communicates with register via PWM interface. This example shows the automatic control halogen bulb light intensity, the first intensity of light is rising and then the intensity of light is falling. Results are being sent to the Usart Terminal where you can track their changes.

void applicationTask() 
{
    mikrobus_logWrite( " Light Intensity Rising  ", _LOG_LINE );
    Delay_1sec();
 
    for ( dutyCycle = 5; dutyCycle < 255; dutyCycle += 25 )
    {
        leddriver2_pwmSetDuty( dutyCycle );
        mikrobus_logWrite( " >", _LOG_TEXT );
        Delay_100ms();
    }
 
    mikrobus_logWrite( ">", _LOG_LINE );
    mikrobus_logWrite( "-------------------------", _LOG_LINE );
    mikrobus_logWrite( " Light Intensity Falling ", _LOG_LINE );
    Delay_1sec();
 
    for ( dutyCycle = 255; dutyCycle > 5; dutyCycle -= 25 )
    {
        leddriver2_pwmSetDuty( dutyCycle );
        mikrobus_logWrite( " <", _LOG_TEXT );
        Delay_100ms();
    }
  
    mikrobus_logWrite( "<", _LOG_LINE );
    mikrobus_logWrite( "-------------------------", _LOG_LINE );
    Delay_1sec();
}  

Additional Functions :

• uint32_t leddriver2_pwmInit( uint16_t freq ) - Initializes the Timer module in PWM mode.
• void leddriver2_pwmSetDuty( uint16_t duty ) - The function changes PWM duty ratio.
• void leddriver2_pwmStart() - Starts appropriate PWM module.
• void leddriver2_pwmStop() - Stops appropriate PWM module.

Other mikroE Libraries used in the example:

• PWM
• UART

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