hztov

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Hz to V Click

Hz to V Click demo application is developed using the NECTO Studio, ensuring compatibility with mikroSDK's open-source libraries and tools. Designed for plug-and-play implementation and testing, the demo is fully compatible with all development, starter, and mikromedia boards featuring a mikroBUS™ socket.

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Click Library

• Author : MikroE Team
• Date : Jan 2020.
• Type : PWM type

Software Support

Example Description

This example demonstrates the use of Hz to V Click board.

Example Libraries

• MikroSDK.Board
• MikroSDK.Log
• Click.HzToV

Example Key Functions

• hztov_cfg_setup Config Object Initialization function.

void hztov_cfg_setup ( hztov_cfg_t *cfg );

• hztov_init Initialization function.

err_t hztov_init ( hztov_t *ctx, hztov_cfg_t *cfg );

• hztov_set_enable Set enable pin state.

void hztov_set_enable ( hztov_t *ctx, uint8_t state );

• hztov_read_voltage Read voltage function.

float hztov_read_voltage ( hztov_t *ctx );

• hztov_set_input_frequency Changing the output voltage function.

void hztov_set_input_frequency ( hztov_t *ctx, uint16_t freq );

Application Init

Initializes the driver and enables the Click board.

void application_init ( void )
{
    log_cfg_t log_cfg;
    hztov_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.

    hztov_cfg_setup( &cfg );
    HZTOV_MAP_MIKROBUS( cfg, MIKROBUS_1 );
    hztov_init( &hztov, &cfg );
    
    hztov_set_enable ( &hztov, HZTOV_ENABLE );
    
    fin = HZTOV_MIN_FREQ;
    
    Delay_ms ( 100 );
}

Application Task

Sets the PWM frequency then reads the voltage from VO pin and logs all data on USB UART.

void application_task ( void )
{
    if ( fin > HZTOV_MAX_FREQ )
        fin = HZTOV_MIN_FREQ;
    hztov_set_input_frequency( &hztov, fin );
    Delay_ms ( 1000 );
    log_printf( &logger, "Frequency: %u Hz \r\n", fin );
    voltage = 0;
    for ( uint8_t cnt = 0; cnt < 100; cnt++ )
    {
        voltage += hztov_read_voltage( &hztov );
    }
    log_printf( &logger, "Voltage: %.2f V \r\n", voltage / 100.0 );
    log_printf( &logger, "-------------------\r\n" );
    
    fin += 1000;
    Delay_ms ( 1000 );
    Delay_ms ( 1000 );
}

Note

In order to set PWM frequency down to 1 kHz, the user will probably need to lower the main MCU clock frequency. The output voltage may vary, depending on the offset potentiometer setting on the Click.

Application Output

This Click board can be interfaced and monitored in two ways:

• Application Output - Use the "Application Output" window in Debug mode for real-time data monitoring. Set it up properly by following this tutorial.
• UART Terminal - Monitor data via the UART Terminal using a USB to UART converter. For detailed instructions, check out this tutorial.

Additional Notes and Information

The complete application code and a ready-to-use project are available through the NECTO Studio Package Manager for direct installation in the NECTO Studio. The application code can also be found on the MIKROE GitHub account.

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