Playtime starts with CTHS15CIC05RROW and STM32F091RC
Hit PLAY for endless entertainment!
Published Feb 26, 2024
Click board™
Button PLAY Click
Dev Board
Nucleo-64 with STM32F091RC MCU
Compiler
NECTO Studio
MCU
STM32F091RC
Designed to enhance user engagement and enjoyment, the purpose of our PLAY button solution is to provide a seamless and convenient way for users to access and experience their favorite games, music, and videos with just one press
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Hardware Overview
How does it work?
Button PLAY Click is based on the CTHS15CIC05ARROW, a capacitive touch sensor display by VCC (Visual Communications Company). This all-in-one sensor provides capacitive touch sensing in an appealing housing with the backlit arrow icon on the top. A minimum number of pins is used on this device: only four pins are exposed to the user. Two more pins are used besides the power supply pins (VCC and GND). The touch detection is indicated by a HIGH logic level on the OUT pin of the CTHS15CIC05ARROW sensor, while the IN pin is used as the power supply for two internal LEDs, which are connected in the common cathode configuration. The forward voltage of the LEDs is typically 3.2V. The OUT pin of the sensor is routed
to the INT pin of the mikroBUS™, while the IN pin of the sensor is routed to the PWM pin of the mikroBUS™. The arrow icon on the top of the touch sensor is visible even when the backlight is off, thanks to the LEXAN™ polycarbonate film with an inverse print of the icon placed on top of the sensor. When the internal LEDs are turned ON, the light will pass through the translucent arrow icon, resulting in a uniformly lit arrow icon. An interesting lighting effect can be designed when touched by applying a PWM signal to the IN pin. The sensor IC, the sensing pad, and two integrated LEDs are enclosed in a small square casing, measuring 15mm by 15mm by 11mm. It forms a compact and robust touch button, which has many advantages over a mechanical button:
it is not subject to wear since there are no moving parts, it does not exhibit any bouncing or chattering effect, it is durable and resistant to weather elements, and more. However, it can’t be used to close an electrical circuit, only to produce a logic signal translated to appropriate action by the host MCU. The sensor can be operated even with wet hands or while using certain gloves. The touch sensor can also be placed behind a clear glass or a plastic layer, such as polycarbonate or acrylic, up to 3mm thick. Although the sensor will perform self-calibration after being powered, it is best to test its functionality in these cases if the position will be fixed.
Features overview
Development board
Nucleo-64 with STM32F091RC MCU offers a cost-effective and adaptable platform for developers to explore new ideas and prototype their designs. This board harnesses the versatility of the STM32 microcontroller, enabling users to select the optimal balance of performance and power consumption for their projects. It accommodates the STM32 microcontroller in the LQFP64 package and includes essential components such as a user LED, which doubles as an ARDUINO® signal, alongside user and reset push-buttons, and a 32.768kHz crystal oscillator for precise timing operations. Designed with expansion and flexibility in mind, the Nucleo-64 board features an ARDUINO® Uno V3 expansion connector and ST morpho extension pin
headers, granting complete access to the STM32's I/Os for comprehensive project integration. Power supply options are adaptable, supporting ST-LINK USB VBUS or external power sources, ensuring adaptability in various development environments. The board also has an on-board ST-LINK debugger/programmer with USB re-enumeration capability, simplifying the programming and debugging process. Moreover, the board is designed to simplify advanced development with its external SMPS for efficient Vcore logic supply, support for USB Device full speed or USB SNK/UFP full speed, and built-in cryptographic features, enhancing both the power efficiency and security of projects. Additional connectivity is
provided through dedicated connectors for external SMPS experimentation, a USB connector for the ST-LINK, and a MIPI® debug connector, expanding the possibilities for hardware interfacing and experimentation. Developers will find extensive support through comprehensive free software libraries and examples, courtesy of the STM32Cube MCU Package. This, combined with compatibility with a wide array of Integrated Development Environments (IDEs), including IAR Embedded Workbench®, MDK-ARM, and STM32CubeIDE, ensures a smooth and efficient development experience, allowing users to fully leverage the capabilities of the Nucleo-64 board in their projects.
Microcontroller Overview
MCU Card / MCU
Architecture
ARM Cortex-M0
MCU Memory (KB)
256
Silicon Vendor
STMicroelectronics
Pin count
64
RAM (Bytes)
32768
You complete me!
Accessories
Click Shield for Nucleo-64 comes equipped with two proprietary mikroBUS™ sockets, allowing all the Click board™ devices to be interfaced with the STM32 Nucleo-64 board with no effort. This way, Mikroe allows its users to add any functionality from our ever-growing range of Click boards™, such as WiFi, GSM, GPS, Bluetooth, ZigBee, environmental sensors, LEDs, speech recognition, motor control, movement sensors, and many more. More than 1537 Click boards™, which can be stacked and integrated, are at your disposal. The STM32 Nucleo-64 boards are based on the microcontrollers in 64-pin packages, a 32-bit MCU with an ARM Cortex M4 processor operating at 84MHz, 512Kb Flash, and 96KB SRAM, divided into two regions where the top section represents the ST-Link/V2 debugger and programmer while the bottom section of the board is an actual development board. These boards are controlled and powered conveniently through a USB connection to program and efficiently debug the Nucleo-64 board out of the box, with an additional USB cable connected to the USB mini port on the board. Most of the STM32 microcontroller pins are brought to the IO pins on the left and right edge of the board, which are then connected to two existing mikroBUS™ sockets. This Click Shield also has several switches that perform functions such as selecting the logic levels of analog signals on mikroBUS™ sockets and selecting logic voltage levels of the mikroBUS™ sockets themselves. Besides, the user is offered the possibility of using any Click board™ with the help of existing bidirectional level-shifting voltage translators, regardless of whether the Click board™ operates at a 3.3V or 5V logic voltage level. Once you connect the STM32 Nucleo-64 board with our Click Shield for Nucleo-64, you can access hundreds of Click boards™, working with 3.3V or 5V logic voltage levels.
Used MCU Pins
mikroBUS™ mapper
Take a closer look
Click board™ Schematic
Step by step
Project assembly
Start by selecting your development board and Click board™. Begin with the Nucleo-64 with STM32F091RC MCU as your development board.
Track your results in real time
Application Output
This Click board can be interfaced and monitored in two ways:
Application Output- Use the "Application Output" window in Debug mode for real-time data monitoring. Set it up properly by following this tutorial.
UART Terminal- Monitor data via the UART Terminal using a USB to UART converter. For detailed instructions, check out this tutorial.
Software Support
Library Description
This library contains API for Button PLAY Click driver.
Key functions:
buttonplay_pwm_stop- This function stops the PWM moudle outputbuttonplay_get_button_state- This function reads the digital signal from the INT pin which tells us whether the button has been pressed or not.
Open Source
Code example
The complete application code and a ready-to-use project are available through the NECTO Studio Package Manager for direct installation in the NECTO Studio. The application code can also be found on the MIKROE GitHub account.
/*!
* @file main.c
* @brief Button Play Click Example.
*
* # Description
* This example showcases how to initialize and use the whole family of Button clicks.
* One library is used for every single one of them. They are simple touch detectors which
* send a pressed/released signal and receive a PWM output which controls the backlight on the button.
*
* The demo application is composed of two sections :
*
* ## Application Init
* This function initializes and configures the logger and click modules.
*
* ## Application Task
* This example first increases the backlight on the button and then decreases the intensity of the backlight. When the button is touched,
* reports the event in the console using UART communication.
*
* @author Nikola Peric
*
*/
#include "board.h"
#include "log.h"
#include "buttonplay.h"
static buttonplay_t buttonplay;
static log_t logger;
void application_init ( void )
{
log_cfg_t log_cfg; /**< Logger config object. */
buttonplay_cfg_t buttonplay_cfg; /**< Click config object. */
/**
* Logger initialization.
* Default baud rate: 115200
* Default log level: LOG_LEVEL_DEBUG
* @note If USB_UART_RX and USB_UART_TX
* are defined as HAL_PIN_NC, you will
* need to define them manually for log to work.
* See @b LOG_MAP_USB_UART macro definition for detailed explanation.
*/
LOG_MAP_USB_UART( log_cfg );
log_init( &logger, &log_cfg );
log_info( &logger, " Application Init " );
// Click initialization.
buttonplay_cfg_setup( &buttonplay_cfg );
BUTTONPLAY_MAP_MIKROBUS( buttonplay_cfg, MIKROBUS_1 );
err_t init_flag = buttonplay_init( &buttonplay, &buttonplay_cfg );
if ( PWM_ERROR == init_flag )
{
log_error( &logger, " Application Init Error. " );
log_info( &logger, " Please, run program again... " );
for ( ; ; );
}
Delay_ms( 500 );
buttonplay_set_duty_cycle ( &buttonplay, 0.0 );
buttonplay_pwm_start( &buttonplay );
log_info( &logger, " Application Task " );
}
void application_task ( void )
{
static float duty_cycle;
static uint8_t button_state;
static uint8_t button_state_old;
button_state = buttonplay_get_button_state( &buttonplay );
if ( button_state && ( button_state != button_state_old ) )
{
log_printf( &logger, " <-- Button pressed --> \r\n" );
for ( uint8_t n_cnt = 1; n_cnt <= 100; n_cnt++ )
{
duty_cycle = ( float ) n_cnt ;
duty_cycle /= 100;
buttonplay_set_duty_cycle( &buttonplay, duty_cycle );
Delay_ms( 10 );
}
button_state_old = button_state;
}
else if ( !button_state && ( button_state != button_state_old ) )
{
for ( uint8_t n_cnt = 100; n_cnt > 0; n_cnt-- )
{
duty_cycle = ( float ) n_cnt ;
duty_cycle /= 100;
buttonplay_set_duty_cycle( &buttonplay, duty_cycle );
Delay_ms( 10 );
}
button_state_old = button_state;
}
}
void main ( void )
{
application_init( );
for ( ; ; )
{
application_task( );
}
}
// ------------------------------------------------------------------------ END
Additional Support
Resources
Category:Capacitive
