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mikroSDK Library

AN to PWM 2 click

Rating:

5

Author: MIKROE

Last Updated: 2020-08-31

Package Version: 1.0.0.0

mikroSDK Library: 1.0.0.0

Category: ADC

Downloaded: 2304 times

Not followed.

License: MIT license  

AN to PWM 2 Click is a compact add-on board that contains an easy-to-use component that converts the value of the input analog signal to a fixed frequency PWM voltage output, with a duty cycle proportional to the input voltage.

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  • mikroSDK Library 2.0.0.0
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mikroSDK Library Blog

AN to PWM 2 click

AN to PWM 2 click

Native view of the AN to PWM 2 click board.

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AN to PWM 2 click

AN to PWM 2 click

Front and back view of the AN to PWM 2 click board.

View full image

Library Description

The library contains basic function for sets frequency and gets interrupt pin state.

Key functions:

  • uint8_t antopwm2_get_int_state ( void ) - Gets interrupt pin state
  • void antopwm2_set_freq ( uint8_t freq ) - Set Frequency

Examples description

The application is composed of three sections :

  • System Initialization - Initializes the INT pin required to measure.
  • Application Initialization - Initializes the driver, timer on 1us and frequency
  • Application Initialization - Initializes the driver, timer on 1us and frequency
void application_task ( )
{
    uint8_t drdy;
    char rsp_data;

    drdy = UART_Rdy_Ptr( );

    if ( drdy != 0 )
    {
        rsp_data = UART_Rd_Ptr( );

        switch ( rsp_data )
        {
            case '+' :
            {
                // Reset flags
                period_flag = 0;
                idle_high_cnt = 0;
                idle_low_cnt = 0;
                period_cnt = 0;
                    
                while ( period_flag != 1 );
                
                idle_high_cnt /= 10;
                idle_low_cnt /= 10;

                if ( ( idle_high_cnt != 0 ) && ( idle_high_cnt != 0 ) )
                {
                    tmp_value = calc_percentage( idle_high_cnt );
                    FloatToStr( tmp_value, demo_text );
                    mikrobus_logWrite( "> Idle [HIGH]: ~ ", _LOG_TEXT );
                    mikrobus_logWrite( demo_text, _LOG_TEXT );
                    mikrobus_logWrite( " %", _LOG_LINE );

                    tmp_value = calc_percentage( idle_low_cnt );
                    FloatToStr( tmp_value, demo_text );
                    mikrobus_logWrite( "> Idle [LOW]: ~ ", _LOG_TEXT );
                    mikrobus_logWrite( demo_text, _LOG_TEXT );
                    mikrobus_logWrite( " %", _LOG_LINE );

                    tmp_value = calc_voltage( idle_high_cnt );
                    FloatToStr( tmp_value , demo_text );
                    mikrobus_logWrite( "> Voltage: ~ ", _LOG_TEXT );
                    mikrobus_logWrite( demo_text, _LOG_TEXT );
                    mikrobus_logWrite( " mV", _LOG_LINE );

                    mikrobus_logWrite( "--------------------------------", _LOG_LINE );
                }
                mikrobus_logWrite( "--- Please, enter the command [ + ].", _LOG_LINE );
                break;
            }
        }
    }
}

Additional Functions :

  • calc_percentage( ) - Represented data as a percentage
  • calc_voltage( ) - Voltage calculation
  • timer_init_1us( ) - Sets timer on 1us

Other mikroE Libraries used in the example:

  • I2C Library
  • Conersions Library

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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