Ensure precise control and confirmation of actions within industrial settings with TL3215AF160BQ and STM32F030R8
Simple and efficient tactile input detection
Published Jul 30, 2024
Click board™
Button 2 Click
Dev Board
Nucleo-64 with STM32F030R8 MCU
Compiler
NECTO Studio
MCU
STM32F030R8
Simple and efficient tactile switch integration with clear visual feedback when the button is pressed, enhancing user interaction.
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Hardware Overview
How does it work?
Button 2 Click is based on the TL3215AF160BQ, a member of the TL3215 series of tactile switches from E-Switch. This specific switch, denoted by its part number TL3215AF160BQ, features several key characteristics. The 'TL' in the part number indicates it belongs to the TL series, known for its high reliability and consistent performance. The '3215' model is a testament to its robust construction and design. It includes an actuator option ('A') with a 2mm actuator, ensuring precise and responsive operation. The 'F160' denotes an actuation force of 160gf, providing a balanced tactile feedback that is neither too hard nor too soft, thus preventing accidental presses while remaining user-friendly. The 'B' indicates the blue color of the switch, making it easily identifiable, while the 'Q' signifies the use of silver contact material, known for its excellent conductivity and durability. Regarding specifications, the TL3215AF160BQ has an impressive electrical rating of 50mA at 12VDC, and its electrical and mechanical life is rated at 1,000,000 cycles, ensuring longevity and reliability
in various applications. Initially, the contact resistance is a maximum of 100mΩ, while the insulation resistance stands at 100MΩ at 500VDC, highlighting its excellent electrical isolation properties. The switch also has a dielectric strength of 250VAC for 1 minute and operates efficiently in a temperature range of -40°C to 85°C. The contact arrangement is single-pole single-throw (SPST), providing straightforward switching functionality. Additionally, the integrated LED in this version operates at a forward current of 20mA with a typical forward voltage of 3V at 20mA. It delivers a typical luminous intensity of 100mcd, ensuring clear visibility of the switch's status. This Click board™ is designed in a unique format supporting the newly introduced MIKROE feature called "Click Snap." Unlike the standardized version of Click boards, this feature allows the main sensor area to become movable by breaking the PCB, opening up many new possibilities for implementation. Thanks to the Snap feature, the TL3215AF160BQ can operate autonomously by accessing its signals directly on
the pins marked 1-8. Additionally, the Snap part includes a specified and fixed screw hole position, enabling users to secure the Snap board in their desired location. Button 2 Click communicates with the host MCU using only two pins from the mikroBUS™ socket, ensuring a simple and efficient interface. The INT pin is dedicated to detecting button presses, providing an interrupt signal whenever the tactile switch is activated. The LED pin controls the blue LED on the TL3215AF160BQ, lighting up momentarily when the switch is pressed. This configuration allows for easy integration into various projects, enabling both input detection and visual feedback with minimal wiring and setup. This Click board™ can operate with either 3.3V or 5V logic voltage levels selected via the VCC SEL jumper. This way, both 3.3V and 5V capable MCUs can use the communication lines properly. Also, this Click board™ comes equipped with a library containing easy-to-use functions and an example code that can be used as a reference for further development.
Features overview
Development board
Nucleo-64 with STM32F030R8 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)
64
Silicon Vendor
STMicroelectronics
Pin count
64
RAM (Bytes)
8192
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 STM32F030R8 MCU as your development board.
Track your results in real time
Application Output
1. Application Output - In Debug mode, the 'Application Output' window enables real-time data monitoring, offering direct insight into execution results. Ensure proper data display by configuring the environment correctly using the provided tutorial.
2. UART Terminal - Use the UART Terminal to monitor data transmission via a USB to UART converter, allowing direct communication between the Click board™ and your development system. Configure the baud rate and other serial settings according to your project's requirements to ensure proper functionality. For step-by-step setup instructions, refer to the provided tutorial.
3. Plot Output - The Plot feature offers a powerful way to visualize real-time sensor data, enabling trend analysis, debugging, and comparison of multiple data points. To set it up correctly, follow the provided tutorial, which includes a step-by-step example of using the Plot feature to display Click board™ readings. To use the Plot feature in your code, use the function: plot(*insert_graph_name*, variable_name);. This is a general format, and it is up to the user to replace 'insert_graph_name' with the actual graph name and 'variable_name' with the parameter to be displayed.
Software Support
Library Description
This library contains API for Button 2 Click driver.
Key functions:
button2_get_int_pin- This function returns the INT pin logic state.button2_toggle_led- This function toggles the button LED state by toggling the LED pin logic state.button2_enable_led- This function enables button LED by setting the LED pin to the high logic state.
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 2 Click Example.
*
* # Description
* This example demonstrates the use of Button 2 click board by toggling the button
* LED and switch state on button press.
*
* The demo application is composed of two sections :
*
* ## Application Init
* Initializes the driver and logger.
*
* ## Application Task
* Toggles the button LED and switch state on button press and displays the state
* on the USB UART.
*
* @author Stefan Filipovic
*
*/
#include "board.h"
#include "log.h"
#include "button2.h"
static button2_t button2; /**< Button 2 Click driver object. */
static log_t logger; /**< Logger object. */
void application_init ( void )
{
log_cfg_t log_cfg; /**< Logger config object. */
button2_cfg_t button2_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.
button2_cfg_setup( &button2_cfg );
BUTTON2_MAP_MIKROBUS( button2_cfg, MIKROBUS_1 );
if ( DIGITAL_OUT_UNSUPPORTED_PIN == button2_init( &button2, &button2_cfg ) )
{
log_error( &logger, " Communication init." );
for ( ; ; );
}
log_info( &logger, " Application Task " );
log_printf ( &logger, " Press button to change switch state\r\n\n" );
log_printf ( &logger, " SWITCH OFF\r\n\n" );
}
void application_task ( void )
{
static uint8_t switch_state = BUTTON2_SWITCH_OFF;
if ( BUTTON2_BUTTON_PRESSED == button2_get_int_pin ( &button2 ) )
{
button2_toggle_led ( &button2 );
switch_state ^= BUTTON2_SWITCH_ON;
if ( BUTTON2_SWITCH_ON == switch_state )
{
log_printf ( &logger, " SWITCH ON\r\n\n" );
}
else
{
log_printf ( &logger, " SWITCH OFF\r\n\n" );
}
Delay_ms ( 1000 );
}
}
int main ( void )
{
/* Do not remove this line or clock might not be set correctly. */
#ifdef PREINIT_SUPPORTED
preinit();
#endif
application_init( );
for ( ; ; )
{
application_task( );
}
return 0;
}
// ------------------------------------------------------------------------ END
