capsense  2.0.0.0
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CapSense Click

CapSense Click add-on board features a capacitive sensing module CY8C201A0 which takes human body capacitance as an input and directly provides the real time sensor information via I2C output.

Click Product page


Click library

  • Author : MikroE Team
  • Date : Dec 2019.
  • Type : I2C type

Software Support

We provide a library for the CapSense 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 CapSense Click driver.

Standard key functions :

Example key functions :

Examples Description

This example waits user to press top and bottom button to turn Click's LEDs ON or OFF.

The demo application is composed of two sections :

Application Init

Initialize CapSense Click and logger.

void application_init ( void )
{
log_cfg_t log_cfg;
LOG_MAP_USB_UART( log_cfg );
log_init( &logger, &log_cfg );
log_info( &logger, "---- Application Init ----" );
// Click initialization.
CAPSENSE_MAP_MIKROBUS( cfg, MIKROBUS_1 );
capsense_init( &capsense, &cfg );
if ( CAPSENSE_ERROR == capsense_default_cfg ( &capsense ) )
{
log_error( &logger, " Default configuration." );
for ( ; ; );
}
log_info( &logger, " Application Task " );
}

Application Task

Press top and bottom button and turn it ON or OFF button LED's.

void application_task ( void )
{
static uint8_t current_led_state = 0;
uint8_t output_lvl[ 10 ] = { 0 };
uint8_t button_select = 0;
uint8_t slider_lvl = 0;
capsense_read_data( &capsense, CAPSENSE_CS_READ_STATUS0, &button_select );
capsense_get_slider_lvl( &capsense, &slider_lvl );
capsense_write_data( &capsense, CAPSENSE_OUTPUT_PORT0, current_led_state );
Delay_ms ( 100 );
if ( 8 == button_select )
{
current_led_state ^= 0x01;
log_printf( &logger, "Toggle LED1\r\n");
Delay_ms ( 100 );
}
if ( 16 == button_select )
{
current_led_state ^= 0x02;
log_printf( &logger, "Toggle LED2\r\n");
Delay_ms ( 100 );
}
if ( 24 == button_select )
{
current_led_state = ~current_led_state;
log_printf( &logger, "Toggle both LEDs\r\n");
Delay_ms ( 100 );
}
if ( slider_lvl )
{
bits_to_str( slider_lvl, output_lvl );
log_printf( &logger, "Slider level - channels [5-1]:\t%s \r\n", &output_lvl[ 3 ] );
Delay_ms ( 100 );
}
}

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.CapSense

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.


CAPSENSE_MAP_MIKROBUS
#define CAPSENSE_MAP_MIKROBUS(cfg, mikrobus)
Definition: capsense.h:67
bits_to_str
void bits_to_str(uint8_t num, uint8_t *s)
Definition: main.c:34
capsense_cfg_t
Click configuration structure definition.
Definition: capsense.h:145
CAPSENSE_CS_READ_STATUS0
#define CAPSENSE_CS_READ_STATUS0
Definition: capsense.h:97
capsense_default_cfg
err_t capsense_default_cfg(capsense_t *ctx)
Click Default Configuration function.
application_task
void application_task(void)
Definition: main.c:86
capsense_cfg_setup
void capsense_cfg_setup(capsense_cfg_t *cfg)
Config Object Initialization function.
capsense_init
err_t capsense_init(capsense_t *ctx, capsense_cfg_t *cfg)
Initialization function.
CAPSENSE_OUTPUT_PORT0
#define CAPSENSE_OUTPUT_PORT0
Definition: capsense.h:95
capsense_write_data
err_t capsense_write_data(capsense_t *ctx, uint8_t reg_address, uint8_t write_command)
Generic write data function.
CAPSENSE_ERROR
#define CAPSENSE_ERROR
Definition: capsense.h:80
application_init
void application_init(void)
Definition: main.c:54
capsense_get_slider_lvl
err_t capsense_get_slider_lvl(capsense_t *ctx, uint8_t *slider_lvl)
Function get slider level.
capsense_read_data
err_t capsense_read_data(capsense_t *ctx, uint8_t reg_address, uint8_t *read_data)
Read one byte from register address.
capsense_t
Click ctx object definition.
Definition: capsense.h:126