capextend  2.0.0.0
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Cap Extend click

Cap Extend click is a mikroBUS add-on board with a SEMTECH SX8633 low power, capacitive button touch controller. It has 12 pins for connecting capacitive inputs (either touch-buttons or proximity sensors).

click Product page


Click library

Software Support

We provide a library for the CapExtend 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 CapExtend Click driver.

Standard key functions :

Example key functions :

Examples Description

This example showcases the initialization and configuration of the logger and click modules

and later on shows how to read and display the 16-bit button map ( LSB + MSB ).

The demo application is composed of two sections :

Application Init

This function initializes and configures the click and logger modules.

{
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.
CAPEXTEND_MAP_MIKROBUS( cfg, MIKROBUS_1 );
capextend_init( &capextend, &cfg );
capextend_reset( &capextend );
}

Application Task

This function collects map data and displays the 16-bit button map, where each bit that has

the value 1 represents a button that has been pressed.

{
uint8_t msb;
uint8_t lsb;
msb = capextend_read_msb_buttons( &capextend );
lsb = capextend_read_lsb_buttons( &capextend );
// LSB
log_printf( &logger, " * ---------LSB--------- * \r\n" );
log_printf( &logger, " * | %d", ( lsb & 0x80 ) >> 7 );
log_printf( &logger, " %d", ( lsb & 0x40 ) >> 6 );
log_printf( &logger, " %d", ( lsb & 0x20 ) >> 5 );
log_printf( &logger, " %d |",( lsb & 0x10 ) >> 4 );
log_printf( &logger, " %d", ( lsb & 0x08 ) >> 3 );
log_printf( &logger, " %d", ( lsb & 0x04 ) >> 2 );
log_printf( &logger, " %d", ( lsb & 0x02 ) >> 1 );
log_printf( &logger, " %d | * \r\n", lsb & 0x01 );
// MSB
log_printf( &logger, " * ---------MSB--------- * \r\n" );
log_printf( &logger, " * | %d", ( msb & 0x80 ) >> 7 );
log_printf( &logger, " %d", ( msb & 0x40 ) >> 6 );
log_printf( &logger, " %d", ( msb & 0x20 ) >> 5 );
log_printf( &logger, " %d |",( msb & 0x10 ) >> 4 );
log_printf( &logger, " %d", ( msb & 0x08 ) >> 3 );
log_printf( &logger, " %d", ( msb & 0x04 ) >> 2 );
log_printf( &logger, " %d", ( msb & 0x02 ) >> 1 );
log_printf( &logger, " %d | * \r\n", msb & 0x01 );
log_printf( &logger, " * ----------------------- * \r\n\r\n" );
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.