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mikroSDK Library

Load cell click

Rating:

5

Author: MIKROE

Last Updated: 2019-11-14

Package Version: 1.0.0.0

mikroSDK Library: 1.0.0.0

Category: Force

Downloaded: 5440 times

Not followed.

License: MIT license  

Load cell click is a weight measurement click which utilizes a load cell element, in order to precisely measure the weight of an object. The Load Cell click can be used with the strain gauge type of load cells and can measure up to ±20V or ±40V of differential voltage.

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  • mikroSDK Library 2.0.0.0
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mikroSDK Library Blog

Load cell click

Load cell click

Native view of the Load cell click board.

View full image
Load cell click

Load cell click

Front and back view of the Load cell click board.

View full image

Library Description

The library covers all the necessary functions to control Load cell click board.
Library reads 24-bit digital converted results from the desired channel with determined rate value (which determines the frequency of internal oscillator).

Key functions:

  • float loadcell_get_weight ( uint8_t input_sel, loadcell_data_t *cell_data ) - Function performs measurement.
  • void loadcell_set_rate ( uint8_t rate_sel ) - Function selects the frequency of internal oscillator.
  • void loadcell_set_mode ( uint8_t pwr_mode ) - Function puts the device in Power Up or Power Down Mode.

Examples description

The application is composed of three sections :

  • System Initialization - Initializes peripherals and pins.
  • Application Initialization - Initializes GPIO driver and performs the device reset,
        after which the next conversion cycle will be for channel B with 32 gate value.
        This function also selects the frequency of the internal oscillator to 10Hz.
        Sets tare the scale, calibrate the scale and start measurements.
  • Application Task - (code snippet) - This is an example that demonstrates the use of Load Cell Click board.
        Display the measurement of scales in grams [ g ].
        Results are being sent to the Usart Terminal where you can track their changes.
        All data logs write on USB uart changes for every 1 sec.
void applicationTask()
{
    weight_val = loadcell_get_weight( LOADCELL_CHANN_B_GATE_32_NEXT, &cell_data );
    
    log_display( weight_val );
    
    Delay_ms( 1000 );
}

Additional Functions:

  • void log_display ( float display_val ) - The function displays readings as a floating-point value with two decimal places.

Other mikroE Libraries used in the example:

  • GPIO
  • Conversions
  • UART

Additional notes and informations

Depending on the development board you are using, you may need USB UART clickUSB 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.

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