V to Hz 2 Click

V to Hz 2 Click is a device that converts an analog voltage input signal into a pulse wave signal of a certain frequency.

Click Product page

Click library

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

Software Support

We provide a library for the VToHz2 Click as well as a demo application (example), developed using MikroElektronika compilers. The demo can run on all the main MikroElektronika development boards.

Package can be downloaded/installed directly form compilers IDE(recommended way), or downloaded from our LibStock, or found on mikroE github account.

Library Description

This library contains API for VToHz2 Click driver.

Standard key functions :

• Config Object Initialization function.

  void vtohz2_cfg_setup ( vtohz2_cfg_t *cfg );

• Initialization function.

  VTOHZ2_RETVAL vtohz2_init ( vtohz2_t ctx, vtohz2_cfg_t cfg );

Example key functions :

• Function gets the out frequency on mikrobus INT pin.

  uint8_t vtohz2_get_freq_out ( vtohz2_t *ctx );

• Function performs enabling and disabling of the device.

  void vtohz2_enable ( vtohz2_t *ctx, uint8_t state );

• This function starts PWM module.

  void vtohz2_pwm_start ( vtohz2_t *ctx );

Examples Description

This appliaction enables usage of a converter for analog voltage input signal into a pulse wave signal of a certain frequency.

The demo application is composed of two sections :

Application Init

Initializes driver and enables the Click board.

void application_init ( void )
{
    log_cfg_t log_cfg;
    vtohz2_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.

    vtohz2_cfg_setup( &cfg );
    VTOHZ2_MAP_MIKROBUS( cfg, MIKROBUS_1 );
    vtohz2_init( &vtohz2, &cfg );

    vtohz2_enable( &vtohz2, VTOHZ2_ENABLE );
    vtohz2_pwm_start( &vtohz2 );
}

Application Task

Sets the output frequency by incrementing the pwm duty cycle from 0 to 100% in an infinite loop. Results are being sent to USB UART terminal.

void application_task ( void )
{
    for ( duty_cycle = 0; duty_cycle <= 1.0; duty_cycle += 0.01 )
    {
        vtohz2_set_duty_cycle ( &vtohz2, duty_cycle );
        log_printf( &logger," PWM Duty: %.2f%%\r\n", duty_cycle * 100 );
        Delay_ms ( 100 );
    }
    log_printf( &logger, "------------------------------\r\n" );
}

The full application code, and ready to use projects can be installed directly form compilers IDE(recommneded) or found on LibStock page or mikroE GitHub accaunt.

Other mikroE Libraries used in the example:

• MikroSDK.Board
• MikroSDK.Log
• Click.VToHz2

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.