zerocross  2.1.0.0
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Zero-Cross click

Zero-Cross Click is a compact add-on board that has the ability to detect the change from positive to negative or negative to a positive level of a sinusoidal waveform. This board features circuitry that provides Zero Crossing Detection (ZCD). Whenever the sine wave crosses the ground potential, the output shifts from HIGH logic to LOW or vice-versa.

click Product page


Click library

  • Author : Stefan Ilic
  • Date : May 2023.
  • Type : GPIO type

Software Support

We provide a library for the Zero-Cross 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 Zero-Cross Click driver.

Standard key functions :

Example key functions :

Example Description

This example demonstrates the use of the Zero-Cross Click board.

The demo application is composed of two sections :

Application Init

Initialization of the log UART and basic Click initialisation.

void application_init ( void )
{
log_cfg_t log_cfg;
zerocross_cfg_t zerocross_cfg;
LOG_MAP_USB_UART( log_cfg );
log_init( &logger, &log_cfg );
log_info( &logger, " Application Init " );
// Click initialization.
zerocross_cfg_setup( &zerocross_cfg );
ZEROCROSS_MAP_MIKROBUS( zerocross_cfg, MIKROBUS_1 );
if ( DIGITAL_OUT_UNSUPPORTED_PIN == zerocross_init( &zerocross, &zerocross_cfg ) )
{
log_error( &logger, " Communication init." );
for ( ; ; );
}
log_info( &logger, " Application Task " );
}

Application Task

Reading frequency value approximately once every second.

void application_task ( void )
{
float freq_val = 0;
zerocross_get_freq( &zerocross, &freq_val );
log_printf( &logger, " Freq %.2f Hz \n\r", freq_val );
}

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.ZeroCross

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.


zerocross_cfg_setup
void zerocross_cfg_setup(zerocross_cfg_t *cfg)
Zero-Cross configuration object setup function.
ZEROCROSS_MAP_MIKROBUS
#define ZEROCROSS_MAP_MIKROBUS(cfg, mikrobus)
MikroBUS pin mapping.
Definition: zerocross.h:91
application_task
void application_task(void)
Definition: main.c:57
zerocross_pin_read
uint8_t zerocross_pin_read(zerocross_t *ctx)
Zero-Cross pin reading function.
zerocross_get_freq
void zerocross_get_freq(zerocross_t *ctx, float *freq)
Zero-Cross frequency reading function.
zerocross_cfg_t
Zero-Cross Click configuration object.
Definition: zerocross.h:112
zerocross_t
Zero-Cross Click context object.
Definition: zerocross.h:102
application_init
void application_init(void)
Definition: main.c:27
zerocross_init
err_t zerocross_init(zerocross_t *ctx, zerocross_cfg_t *cfg)
Zero-Cross initialization function.