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Counter Click

Counter 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 : SPI type

Software Support

Example Description

This application measures the speed and the position of the DC motor shafts.

Example Libraries

• MikroSDK.Board
• MikroSDK.Log
• Click.Counter

Example Key Functions

• counter_cfg_setup Config Object Initialization function.

void counter_cfg_setup ( counter_cfg_t *cfg );

• counter_init Initialization function.

err_t counter_init ( counter_t *ctx, counter_cfg_t *cfg );

• counter_default_cfg Click Default Configuration function.

void counter_default_cfg ( counter_t *ctx );

• counter_read_cntr This function reads CNTR, using Click object.

int32_t counter_read_cntr ( counter_t *ctx );

• counter_read_str This function reads STR, using Click object.

uint8_t counter_read_str ( counter_t *ctx );

• counter_read_otr This function reads OTR, using Click object.

int32_t counter_read_otr ( counter_t *ctx );

Application Init

Initializes driver init and chip init

void application_init ( void )
{
    log_cfg_t log_cfg;
    counter_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.

    counter_cfg_setup( &cfg );
    COUNTER_MAP_MIKROBUS( cfg, MIKROBUS_1 );
    counter_init( &counter, &cfg );

    counter_default_cfg( &counter );
    Delay_ms ( 300 );
}

Application Task

Reads data from the CNTR register and calculates the speed of the motor in Rad/s. All data is being displayed on the USB UART terminal where you can track their changes. The CNTR is a software configurable 8, 16, 24 or 32-bit up/down counter which counts the up/down pulses resulting from the quadrature clocks applied at the A and B inputs, or alternatively, in non-quadrature mode, pulses applied at the A input.

void application_task ( void )
{
    count = counter_read_cntr( &counter );
    log_printf( &logger, "Counter: %ld\r\n",  count );
    speed = ( float ) ( count - count_old ) / 3600.0;
    speed *= 6.283185;
    log_printf( &logger, "Speed: %.4f Rad/s\r\n",  speed );
    count_old = count;
    log_printf( &logger, "-------------------------\r\n" );
    Delay_ms ( 1000 );
}

Note

An appropriate motor with optical encoder needs to be connected to the Click board.

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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