Load Cell 3 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.
- Author : Nenad Filipovic
- Date : May 2021.
- Type : I2C type
This library contains API for the Load Cell 3 Click driver. The library also includes a function for tare and calibration and weight measurement. This demo application shows an example of weight measurement.
- MikroSDK.Board
- MikroSDK.Log
- Click.LoadCell3
loadcell3_cfg_setupConfig Object Initialization function.
void loadcell3_cfg_setup ( loadcell3_cfg_t *cfg );loadcell3_initInitialization function.
err_t loadcell3_init ( loadcell3_t *ctx, loadcell3_cfg_t *cfg );loadcell3_default_cfgClick Default Configuration function.
void loadcell3_default_cfg ( loadcell3_t *ctx );loadcell3_tareLoad Cell 3 tare the scales function.
void loadcell3_tare ( loadcell3_t *ctx, loadcell3_data_t *cell_data );loadcell3_calibrationLoad Cell 3 calibration function.
err_t loadcell3_calibration ( loadcell3_t *ctx, uint16_t cal_val, loadcell3_data_t *cell_data );loadcell3_get_weightLoad Cell 3 get weight function.
float loadcell3_get_weight ( loadcell3_t *ctx, loadcell3_data_t *cell_data );Initialization of I2C module and log UART. After driver initialization and default settings, the app sets tare the scale, calibrate scale and start measurements.
void application_init ( void )
{
log_cfg_t log_cfg; /**< Logger config object. */
loadcell3_cfg_t loadcell3_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.
loadcell3_cfg_setup( &loadcell3_cfg );
LOADCELL3_MAP_MIKROBUS( loadcell3_cfg, MIKROBUS_1 );
err_t init_flag = loadcell3_init( &loadcell3, &loadcell3_cfg );
if ( init_flag == I2C_MASTER_ERROR ) {
log_error( &logger, " Application Init Error. " );
log_info( &logger, " Please, run program again... " );
for ( ; ; );
}
loadcell3_default_cfg ( &loadcell3 );
log_info( &logger, " Application Task " );
Delay_ms ( 100 );
log_printf( &logger, "-------------------------\r\n" );
log_printf( &logger, " Tare the scale : \r\n" );
log_printf( &logger, "- - - - - - - - - - - - -\r\n" );
log_printf( &logger, " >> Remove all object << \r\n" );
log_printf( &logger, "- - - - - - - - - - - - -\r\n" );
log_printf( &logger, " In the following 10 sec \r\n" );
log_printf( &logger, " please remove all object\r\n" );
log_printf( &logger, " from the scale. \r\n" );
Delay_ms ( 1000 );
Delay_ms ( 1000 );
Delay_ms ( 1000 );
Delay_ms ( 1000 );
Delay_ms ( 1000 );
Delay_ms ( 1000 );
Delay_ms ( 1000 );
Delay_ms ( 1000 );
Delay_ms ( 1000 );
Delay_ms ( 1000 );
log_printf( &logger, "-------------------------\r\n" );
log_printf( &logger, " Start tare scales \r\n" );
loadcell3_tare ( &loadcell3, &cell_data );
Delay_ms ( 500 );
log_printf( &logger, "-------------------------\r\n" );
log_printf( &logger, " Tarring is complete \r\n" );
log_printf( &logger, "-------------------------\r\n" );
log_printf( &logger, " Calibrate Scale : \r\n" );
log_printf( &logger, "- - - - - - - - - - - - -\r\n" );
log_printf( &logger, " >>> Load etalon <<< \r\n" );
log_printf( &logger, "- - - - - - - - - - - - -\r\n" );
log_printf( &logger, " In the following 10 sec \r\n" );
log_printf( &logger, "place 100g weight etalon \r\n" );
log_printf( &logger, " on the scale for \r\n" );
log_printf( &logger, " calibration purpose. \r\n" );
Delay_ms ( 1000 );
Delay_ms ( 1000 );
Delay_ms ( 1000 );
Delay_ms ( 1000 );
Delay_ms ( 1000 );
Delay_ms ( 1000 );
Delay_ms ( 1000 );
Delay_ms ( 1000 );
Delay_ms ( 1000 );
Delay_ms ( 1000 );
log_printf( &logger, "-------------------------\r\n" );
log_printf( &logger, " Start calibration \r\n" );
if ( loadcell3_calibration ( &loadcell3, LOADCELL3_WEIGHT_100G, &cell_data ) == LOADCELL3_OK ) {
log_printf( &logger, "-------------------------\r\n" );
log_printf( &logger, " Calibration Done \r\n" );
log_printf( &logger, "- - - - - - - - - - - - -\r\n" );
log_printf( &logger, " >>> Remove etalon <<< \r\n" );
log_printf( &logger, "- - - - - - - - - - - - -\r\n" );
log_printf( &logger, " In the following 10 sec \r\n" );
log_printf( &logger, " remove 100g weight \r\n" );
log_printf( &logger, " etalon on the scale. \r\n" );
Delay_ms ( 1000 );
Delay_ms ( 1000 );
Delay_ms ( 1000 );
Delay_ms ( 1000 );
Delay_ms ( 1000 );
Delay_ms ( 1000 );
Delay_ms ( 1000 );
Delay_ms ( 1000 );
Delay_ms ( 1000 );
Delay_ms ( 1000 );
}
else {
log_printf( &logger, "-------------------------\r\n" );
log_printf( &logger, " Calibration Error \r\n" );
for ( ; ; );
}
log_printf( &logger, "-------------------------\r\n" );
log_printf( &logger, " Start measurements : \r\n" );
log_printf( &logger, "-------------------------\r\n" );
}This is an example that shows the use of a Load Cell 3 Click board™. The Load Cell 3 Click board can be used to measure weight, shows the measurement of scales in grams [ g ]. Results are being sent to the Usart Terminal where you can track their changes.
void application_task ( void )
{
weight_val = loadcell3_get_weight( &loadcell3, &cell_data );
log_printf( &logger, " Weight : %.2f g\r\n", weight_val );
Delay_ms ( 1000 );
}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.
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.