pac1921  2.0.0.0
Main Page

PAC1921 click

PAC1921 click is a versatile power monitoring and measuring device intended for the high speed, low latency measurements. This device can measure current, voltage or the power of the connected load.

click Product page


Click library

Software Support

We provide a library for the PAC1921 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 PAC1921 Click driver.

Standard key functions :

Example key functions :

Examples Description

This example showcases how to measure voltage, current or power (load) data using the

PAC1921 chip. Required modules are first initialized and after used to read and display the measured data.

The demo application is composed of two sections :

Application Init

This function initializes and configures the logger and click modules. Default settings

are written to three control/configuration registers in the default_cfg(...) function.

{
log_cfg_t log_cfg;
// Logger initialization.
log_cfg.level = LOG_LEVEL_DEBUG;
LOG_MAP_USB_UART( log_cfg );
log_init( &logger, &log_cfg );
log_info( &logger, "---- Application Init ----" );
// Click initialization.
PAC1921_MAP_MIKROBUS( cfg, MIKROBUS_1 );
pac1921_init( &pac1921, &cfg );
Delay_ms( 100 );
pac1921_default_cfg( &pac1921 );
Delay_ms( 100 );
}

Application Task

This function reads and displays voltage, current or power data from the chip, depending

on the specified measurement mode and sample count. It does so every half a second.

{
float read_data;
if ( pac1921.aux.measurement_mode_old == PAC1921_MEASUREMENT_MODE_V_POWER_FREE_RUN )
{
log_printf( &logger, " * Power: %.2f W * \r\n", read_data );
}
else
{
log_printf( &logger, " * Voltage: %.2f mV * \r\n", read_data );
}
Delay_ms( 500 );
}

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:

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.