Take your senses to the next level with DA7282 and PIC18F57Q43
Experience haptic feedback like never before!
Published Feb 13, 2024
Click board™
Haptic 3 Click
Dev. board
Curiosity Nano with PIC18F57Q43
Compiler
NECTO Studio
MCU
PIC18F57Q43
The haptic driver that brings your digital world to life with realistic touch feedback!
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Hardware Overview
How does it work?
Haptic 3 Click is based on the DA7282, a haptic driver capable of driving both LRA and ERM actuators from Dialog Semiconductor. The power-optimized architecture and advanced closed-loop digital algorithms achieve a high-fidelity haptic drive. The DA7282 features frequency control within an onboard Waveform Memory and three distinct general-purpose inputs for triggering up to six specific sequences, which helps with emulating button pressing in many applications. The device controls drive levels based on the sequence selected by the I2C interface across the load and senses the movement of the actuator. The driven waveform is generated by a current-regulated loop using a high-frequency PWM modulation. The differential output drive features a switching regulator architecture with an H-bridge differential drive across the load at 187.5kHz. The DA7282 can also perform close-loop actuator monitoring while driving to enable calibration-free playback, frequency tracking
(LRA only), Active Acceleration, Rapid Stop, and actuator diagnostics. Resonant frequency tracking can be enabled while driving an LRA to track the mechanical resonance of the actuator through closed-loop control or can be disabled to operate DA7282 in open-loop wideband frequency operation while driving LRAs with a broader bandwidth frequency response. Also, Active Acceleration and Rapid Stop features enable automated driving of both ERM and LRA loads (when frequency tracking is enabled), which reduces the time to reach the target acceleration level and the time for the actuator to come to a complete stop. Although it can use both mikroBUS™ power rails for regular power supply, its digital part requires a voltage level of 1.8V to work correctly. Therefore, a small regulating LDO, the BH18PB1WHFV, provides a 1.8V out of 5V and 3.3V mikroBUS™ power rails alongside Enable feature through the EN pin of the mikroBUS™ socket, offering a switch operation to turn ON/OFF
power delivery to the connected load. Haptic 3 Click communicates with MCU using the standard I2C 2-Wire interface with a maximum clock frequency of 400kHz. Since the sensor for communication requires a logic level of 1.8V, this Click board™ also features the PCA9306 voltage-level translator. The I2C interface bus lines are routed to the voltage-level translators allowing this Click board™ to work with both 3.3V and 5V MCUs properly. Also, it uses an interrupt pin, routed to the IRQ pin of the mikroBUS™ socket, when a different fault condition occurs to alert the MCU. 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. However, the 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
PIC18F57Q43 Curiosity Nano evaluation kit is a cutting-edge hardware platform designed to evaluate microcontrollers within the PIC18-Q43 family. Central to its design is the inclusion of the powerful PIC18F57Q43 microcontroller (MCU), offering advanced functionalities and robust performance. Key features of this evaluation kit include a yellow user LED and a responsive
mechanical user switch, providing seamless interaction and testing. The provision for a 32.768kHz crystal footprint ensures precision timing capabilities. With an onboard debugger boasting a green power and status LED, programming and debugging become intuitive and efficient. Further enhancing its utility is the Virtual serial port (CDC) and a debug GPIO channel (DGI
GPIO), offering extensive connectivity options. Powered via USB, this kit boasts an adjustable target voltage feature facilitated by the MIC5353 LDO regulator, ensuring stable operation with an output voltage ranging from 1.8V to 5.1V, with a maximum output current of 500mA, subject to ambient temperature and voltage constraints.
Microcontroller Overview
MCU Card / MCU
Architecture
PIC
MCU Memory (KB)
128
Silicon Vendor
Microchip
Pin count
48
RAM (Bytes)
8196
You complete me!
Accessories
Curiosity Nano Base for Click boards is a versatile hardware extension platform created to streamline the integration between Curiosity Nano kits and extension boards, tailored explicitly for the mikroBUS™-standardized Click boards and Xplained Pro extension boards. This innovative base board (shield) offers seamless connectivity and expansion possibilities, simplifying experimentation and development. Key features include USB power compatibility from the Curiosity Nano kit, alongside an alternative external power input option for enhanced flexibility. The onboard Li-Ion/LiPo charger and management circuit ensure smooth operation for battery-powered applications, simplifying usage and management. Moreover, the base incorporates a fixed 3.3V PSU dedicated to target and mikroBUS™ power rails, alongside a fixed 5.0V boost converter catering to 5V power rails of mikroBUS™ sockets, providing stable power delivery for various connected devices.
Vibration ERM Motor 9K RPM 3V (VC1026B002F - old MPN C1026B002F) represents a compact-size Eccentric Rotating Mass (ERM) motor designed by Vybronics. This type of motor contains a small eccentric weight on its rotor, so while rotating, it also produces a vibration effect often used for haptic feedback on many small handheld devices. Due to its circular shape with a diameter of 10mm, the VC1026B002F is often referred to as a coin motor. The main characteristics of this vibration motor are its supply voltage, in this case, 3VDC, maximum rated current of 85mA, and the rated speed of 9000RPM, which produces the highest G force/vibration energy of 0.80GRMS. It can also be used with self-adhesive tape to mount it on your PCB or the inner wall of your product's housing.
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 Curiosity Nano with PIC18F57Q43 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 Haptic 3 Click driver.
Key functions:
haptic3_set_vibration_levelThis function sets the motor vibration level.haptic3_get_vibration_levelThis function reads the motor vibration level.haptic3_write_registerThis function writes desired data to the selected register by using I2C serial interface.
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 HAPTIC3 Click example
*
* # Description
* This example demonstrates the use of HAPTIC 3 click board by controlling
* the attached motor vibration level.
*
* The demo application is composed of two sections :
*
* ## Application Init
* Initializes the driver and performs the click default configuration.
*
* ## Application Task
* Changes the motor vibration level every 2 seconds from MAX to MIN,
* and displays the currently set level on the USB UART.
*
* @author Stefan Filipovic
*
*/
#include "board.h"
#include "log.h"
#include "haptic3.h"
static haptic3_t haptic3;
static log_t logger;
void application_init ( void )
{
log_cfg_t log_cfg; /**< Logger config object. */
haptic3_cfg_t haptic3_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.
haptic3_cfg_setup( &haptic3_cfg );
HAPTIC3_MAP_MIKROBUS( haptic3_cfg, MIKROBUS_1 );
if ( I2C_MASTER_ERROR == haptic3_init( &haptic3, &haptic3_cfg ) )
{
log_error( &logger, " Communication init." );
for ( ; ; );
}
if ( HAPTIC3_ERROR == haptic3_default_cfg ( &haptic3 ) )
{
log_error( &logger, " Default configuration." );
for ( ; ; );
}
log_info( &logger, " Application Task " );
}
void application_task ( void )
{
float vibration_level;
if ( HAPTIC3_OK == haptic3_set_vibration_level ( &haptic3, HAPTIC3_VIBRATION_LEVEL_MAX ) )
{
if ( HAPTIC3_OK == haptic3_get_vibration_level ( &haptic3, &vibration_level ) )
{
log_printf( &logger, " Vibration level: %.3f \r\n\n", vibration_level );
}
}
Delay_ms ( 1000 );
Delay_ms ( 1000 );
if ( HAPTIC3_OK == haptic3_set_vibration_level ( &haptic3, HAPTIC3_VIBRATION_LEVEL_MIN ) )
{
if ( HAPTIC3_OK == haptic3_get_vibration_level ( &haptic3, &vibration_level ) )
{
log_printf( &logger, " Vibration level: %.3f \r\n\n", vibration_level );
}
}
Delay_ms ( 1000 );
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
