touchclamp  2.0.0.0
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TouchClamp click

TouchClamp click is a mikroBUS™ add-on board with NXP’s MPR121 proximity capacitive touch sensor controller. It has seven plated holes for clamps which can be used to connect any – literally any – conductive object in order to use it as an input button to send an interrupt to the target board MCU.

click Product page


Click library

  • Author : Nenad Filipovic
  • Date : Dec 2019.
  • Type : I2C type

Software Support

We provide a library for the TouchClamp 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 TouchClamp Click driver.

Standard key functions :

  • Config Object Initialization function.

    void touchclamp_cfg_setup ( touchclamp_cfg_t *cfg );

  • Initialization function.

    TOUCHCLAMP_RETVAL touchclamp_init ( touchclamp_t *ctx, touchclamp_cfg_t *cfg );

  • Click Default Configuration function.

    void touchclamp_default_cfg ( touchclamp_t *ctx );

Example key functions :

  • Get touch data function.

    uint16_t touchclamp_get_touch_data ( touchclamp_t *ctx );

Examples Description

This demo-app shows the touch position using TouchClamp click.

The demo application is composed of two sections :

Application Init

Configuring clicks and log objects. Setting the click in the default configuration.

void application_init ( void )
{
log_cfg_t log_cfg;
LOG_MAP_USB_UART( log_cfg );
log_init( &logger, &log_cfg );
log_printf( &logger, " Application Init \r\n" );
// Click initialization.
TOUCHCLAMP_MAP_MIKROBUS( cfg, MIKROBUS_1 );
touchclamp_init( &touchclamp, &cfg );
Delay_ms( 100 );
touchclamp_soft_reset( &touchclamp );
Delay_ms( 100 );
touchclamp_default_cfg( &touchclamp );
Delay_ms( 100 );
log_printf( &logger, "-------------------\r\n" );
log_printf( &logger, " Touch Clamp Click \r\n" );
log_printf( &logger, "-------------------\r\n" );
}

Application Task

Detect and dispay touch position when the click is triggered.

void application_task ( void )
{
{
log_printf( &logger, " - - - - - - - H\r\n" );
log_printf( &logger, " - - - - - - G -\r\n" );
log_printf( &logger, " - - - - - F - -\r\n" );
log_printf( &logger, " - - - - E - - -\r\n" );
log_printf( &logger, " - - - D - - - -\r\n" );
log_printf( &logger, " - - C - - - - -\r\n" );
log_printf( &logger, " - B - - - - - -\r\n" );
log_printf( &logger, " A - - - - - - -\r\n" );
}
}

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:

  • MikroSDK.Board
  • MikroSDK.Log
  • Click.TouchClamp

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.


TOUCHCLAMP_TOUCH_POSITION_F
#define TOUCHCLAMP_TOUCH_POSITION_F
Definition: touchclamp.h:464
touch_data_old
uint16_t touch_data_old
Definition: main.c:31
TOUCHCLAMP_TOUCH_POSITION_E
#define TOUCHCLAMP_TOUCH_POSITION_E
Definition: touchclamp.h:463
touch_data
uint16_t touch_data
Definition: main.c:30
TOUCHCLAMP_TOUCH_POSITION_D
#define TOUCHCLAMP_TOUCH_POSITION_D
Definition: touchclamp.h:462
TOUCHCLAMP_TOUCH_POSITION_B
#define TOUCHCLAMP_TOUCH_POSITION_B
Definition: touchclamp.h:460
application_task
void application_task(void)
Definition: main.c:73
touchclamp_cfg_t
Click configuration structure definition.
Definition: touchclamp.h:500
touchclamp_init
TOUCHCLAMP_RETVAL touchclamp_init(touchclamp_t *ctx, touchclamp_cfg_t *cfg)
Initialization function.
TOUCHCLAMP_MAP_MIKROBUS
#define TOUCHCLAMP_MAP_MIKROBUS(cfg, mikrobus)
Definition: touchclamp.h:52
TOUCHCLAMP_TOUCH_POSITION_A
#define TOUCHCLAMP_TOUCH_POSITION_A
Definition: touchclamp.h:459
touchclamp_cfg_setup
void touchclamp_cfg_setup(touchclamp_cfg_t *cfg)
Config Object Initialization function.
application_init
void application_init(void)
Definition: main.c:35
touchclamp_default_cfg
void touchclamp_default_cfg(touchclamp_t *ctx)
Click Default Configuration function.
touchclamp_get_touch_data
uint16_t touchclamp_get_touch_data(touchclamp_t *ctx)
Get touch data function.
TOUCHCLAMP_TOUCH_POSITION_G
#define TOUCHCLAMP_TOUCH_POSITION_G
Definition: touchclamp.h:465
touchclamp_soft_reset
void touchclamp_soft_reset(touchclamp_t *ctx)
Soft reset function.
TOUCHCLAMP_NO_TOUCH
#define TOUCHCLAMP_NO_TOUCH
Definition: touchclamp.h:467
TOUCHCLAMP_TOUCH_POSITION_C
#define TOUCHCLAMP_TOUCH_POSITION_C
Definition: touchclamp.h:461
TOUCHCLAMP_TOUCH_POSITION_H
#define TOUCHCLAMP_TOUCH_POSITION_H
Definition: touchclamp.h:466