Clock Gen 6 Click

Clock Gen 6 Click is a compact add-on board representing a digital oscillator solution. This board features the MIC1557, an IttyBitty CMOS RC oscillator designed to provide rail-to-rail pulses for precise time delay or frequency generation from Microchip Technology. The MIC1557 has a single threshold and trigger connection, internally connected, for astable (oscillator) operation only. It also has an enable/reset control signal routed to the RST pin of the mikroBUS™ socket, which controls the bias supply to the oscillator’s internal circuitry and optimizes power consumption used for oscillator power ON/OFF purposes. In addition, it provides the ability to select the desired frequency programmed via a digital potentiometer, the MAX5401.

Click Product page

Click library

• Author : Stefan Filipovic
• Date : Dec 2021.
• Type : SPI type

Software Support

We provide a library for the Clock Gen 6 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 from NECTO Studio Package Manager(recommended way), downloaded from our LibStock™ or found on Mikroe github account.

Library Description

This library contains API for Clock Gen 6 Click driver.

Standard key functions :

• clockgen6_cfg_setup Config Object Initialization function.

  void clockgen6_cfg_setup ( clockgen6_cfg_t *cfg );

• clockgen6_init Initialization function.

  err_t clockgen6_init ( clockgen6_t *ctx, clockgen6_cfg_t *cfg );

• clockgen6_default_cfg This function executes a default configuration of Clock Gen 6 Click board.

  err_t clockgen6_default_cfg ( clockgen6_t *ctx );

Example key functions :

• clockgen6_set_digipot This function sets the digital potentiometer position by using SPI serial interface.

  err_t clockgen6_set_digipot ( clockgen6_t *ctx, uint8_t position );

• clockgen6_enable_output This function enables the output by setting the EN pin to high logic state.

  void clockgen6_enable_output ( clockgen6_t *ctx );

• clockgen6_disable_output This function disables the output by setting the EN pin to low logic state.

  void clockgen6_disable_output ( clockgen6_t *ctx );

Example Description

This example demonstrates the use of Clock Gen 6 Click board which acts as an astable oscillator.

The demo application is composed of two sections :

Application Init

Initializes the driver and performs the Click default configuration which sets the digital potentiometer to max position and enables the clock output.

void application_init ( void )
{
    log_cfg_t log_cfg;  /**< Logger config object. */
    clockgen6_cfg_t clockgen6_cfg;  /**< Click config object. */

    /** 
     * 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.
    clockgen6_cfg_setup( &clockgen6_cfg );
    CLOCKGEN6_MAP_MIKROBUS( clockgen6_cfg, MIKROBUS_1 );
    if ( DIGITAL_OUT_UNSUPPORTED_PIN == clockgen6_init( &clockgen6, &clockgen6_cfg ) ) 
    {
        log_error( &logger, " Communication init." );
        for ( ; ; );
    }

    if ( CLOCKGEN6_ERROR == clockgen6_default_cfg ( &clockgen6 ) )
    {
        log_error( &logger, " Default configuration." );
        for ( ; ; );
    }

    log_info( &logger, " Application Task " );
}

Application Task

Changes the clock output frequency by changing the digital potentiometer position every second. The potentiometer position value will be displayed on the USB UART.

void application_task ( void )
{
    for ( int16_t pos = CLOCKGEN6_DIGIPOT_POSITION_MAX; pos >= CLOCKGEN6_DIGIPOT_POSITION_MIN; )
    {
        if ( CLOCKGEN6_OK == clockgen6_set_digipot ( &clockgen6, pos ) )
        {
            log_printf( &logger, " DIGIPOT position: %u\r\n", pos );
            Delay_ms ( 1000 );
            pos -= 5;
        }
    }
}

The full application code, and ready to use projects can be installed directly from NECTO Studio Package Manager(recommended way), downloaded from our LibStock™ or found on Mikroe github account.

Other Mikroe Libraries used in the example:

• MikroSDK.Board
• MikroSDK.Log
• Click.ClockGen6

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. UART terminal is available in all MikroElektronika compilers.