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mikroSDK Library

CAP Wheel click

Rating:

5

Author: MikroElektronika Team

Last Updated: 2019-04-12

Category: Other Codes

Downloaded: 49 times

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License: MIT license  

CAP Wheel Click is a capacitive touch sensor with round shaped electrodes integrated on a click board.

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mikroSDK Library Blog

CAP Wheel Click

CAP Wheel Click

Native view of the CAP Wheel Click board.

View full image
CAP Wheel Click

CAP Wheel Click

Front and back view of the CAP Wheel Click board.

View full image

Library Description

Library performs the control of the CAP Wheel click board and allows to set all necessary configurations which include number of activated channels, threshold values for touch for each channel and for proximity, and etc. Also can read data from capacitance wheel and represent that value on LEDs. For more details check documentation.

Key functions:

  • uint8_t capwheel_writeReg( uint8_t register_address, uint8_t *dataIn, uint8_t nBytes ) - Function writes the determined number of bytes to the register.
  • void capwheel_getData( uint16_t *wheelData ) - Function reads data from wheel 1 and stores this value in memory via output parameter.
  • void capwheel_setOutput( uint16_t inputData, uint8_t outputMode ) - Function sets output LEDs depending on the input wheel data value in the way which is determined with the ouputMode parameter.

Examples description

The application is composed of three sections :

  • System Initialization - Initializes peripherals and pins.
  • Application Initialization - Initializes I2C interface, performs the device reset and activates the desired channels (from CH0 to CH9), in this example all channels are activated.
  • Application Task - (code snippet) - Checks is sense data ready for reading and if was ready, then reads wheel coordinates and sends these results to the LEDs.
void applicationTask()
{
    readyCheck = capwheel_checkDataReady();

    if (readyCheck == _CAPWHEEL_DATA_READY)
    {
        capwheel_getData( &senseData );
        
        capwheel_setOutput( senseData, _CAPWHEEL_LED_BRIGHTNESS_NUMBER );
    }
}

Other mikroE Libraries used in the example:

  • I2C

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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