Upgrade your projects with DRV8317H and STM32L073RZ
Improve your applications with our smart, reliable brushless motor driver!
Published Feb 26, 2024
Click board™
Brushless 26 Click
Dev Board
Nucleo-64 with STM32L073RZ MCU
Compiler
NECTO Studio
MCU
STM32L073RZ
Whether you're building drones or robotics, our brushless motor drivers offer the perfect blend of power and agility, ensuring your devices perform at their peak.
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Hardware Overview
How does it work?
Brushless 26 Click is based on the DRV8317H, a three-phase PWM motor driver from Texas Instruments. Its integrated protection features include VM undervoltage lockout, VM overvoltage protection, charge pump undervoltage, overcurrent protection, overtemperature warning and shutdown, and fault condition indication pin. The motor driver provides two configurable schemes, a 6x or a 3x PWM, which can be used to implement sensor or sensor-less field-oriented control (FOC), sinusoidal control, or trapezoidal control using an external microcontroller. It is capable of driving a PWM frequency of up to 200KHz. To control all high and low side driver control inputs of the DRV8317H, Brushless 26 Click features the PCA9538A, a low-voltage 8-bit I2C I/O port with interrupt and reset from NXP. Besides driver control
inputs, this I/O port also controls the Sleep mode of the motor driver. The BLDC motor can be connected over the screw terminal, labeled U, V, and W. Additional screw terminal is just aside for connecting an external power supply in a range of 4.5V up to 20V. The DRV8317H is a hardware variant of this motor driver, so the Brushless 26 Click is equipped with jumper selections of the gain, slew, and mode; by default, all three are set to 0. This way, you can set the current sense amplifier gain (GA) and output slew rate (SW) through pin voltage levels. The mode jumper (MD) allows you to use a 6x or 3x PWM mode. The 6x PWM is set by default. Additionally, three current sense amplifiers are available over the 4-pin header labeled A1, A2, and A3. Brushless 26 Click uses a standard 2-wire I2C interface of the PCA9538A to
communicate with the host MCU, supporting clock frequencies up to 400kHz. The I2C address of the PCA9538A can be set over the ADDR SEL jumpers, where 0 is selected by default. If a fault condition occurs, the DRV8317H will pull the FLT pin to a low logic state. The RST pin resets the PCA9538A I/O port. 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 STM32L073RZ 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)
192
Silicon Vendor
STMicroelectronics
Pin count
64
RAM (Bytes)
20480
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.
Brushless DC (BLDC) Motor with a Hall sensor represents a high-performance motor from the 42BLF motor series. This motor, wired in a star configuration, boasts a Hall Effect angle of 120°, ensuring precise and reliable performance. With a compact motor length of 47mm and a lightweight design tipping the scales at just 0.29kg, this BLDC motor is engineered to meet your needs. Operating flawlessly at a voltage rating of 24VDC and a speed range of 4000 ± 10% RPM, this motor offers consistent and dependable power. It excels in a normal operational temperature range from -20 to +50°C, maintaining efficiency with a rated current of 1.9A. Also, this product seamlessly integrates with all Brushless Click boards™ and those that require BLDC motors with Hall sensors.
Used MCU Pins
mikroBUS™ mapper
Take a closer look
Schematic
Step by step
Project assembly
Start by selecting your development board and Click board™. Begin with the Nucleo-64 with STM32L073RZ MCU as your development board.
Track your results in real time
Application Output via Debug Mode
1. Once the code example is loaded, pressing the "DEBUG" button initiates the build process, programs it on the created setup, and enters Debug mode.
2. After the programming is completed, a header with buttons for various actions within the IDE becomes visible. Clicking the green "PLAY" button starts reading the results achieved with the Click board™. The achieved results are displayed in the Application Output tab.
Software Support
Library Description
This library contains API for Brushless 26 Click driver.
Key functions:
brushless26_reset_port_exp- Brushless 26 reset port expander function.brushless26_set_pins- Brushless 26 set pins function.brushless26_drive_motor- Brushless 26 drive motor function.
Open Source
Code example
This example can be found in NECTO Studio. Feel free to download the code, or you can copy the code below.
/*!
* @file main.c
* @brief Brushless 26 Click example
*
* # Description
* This example demonstrates the use of the Brushless 26 click board by driving the
* motor in both directions at different speeds.
*
* The demo application is composed of two sections :
*
* ## Application Init
* Initializes the driver and performs the click default configuration.
*
* ## Application Task
* Drives the motor in both directions and changes the motor speed approximately every 2 seconds.
* The driving direction and speed will be displayed on the USB UART.
*
* @author Stefan Ilic
*
*/
#include "board.h"
#include "log.h"
#include "brushless26.h"
static brushless26_t brushless26;
static log_t logger;
void application_init ( void )
{
log_cfg_t log_cfg; /**< Logger config object. */
brushless26_cfg_t brushless26_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.
brushless26_cfg_setup( &brushless26_cfg );
BRUSHLESS26_MAP_MIKROBUS( brushless26_cfg, MIKROBUS_1 );
if ( I2C_MASTER_ERROR == brushless26_init( &brushless26, &brushless26_cfg ) )
{
log_error( &logger, " Communication init." );
for ( ; ; );
}
if ( BRUSHLESS26_ERROR == brushless26_default_cfg ( &brushless26 ) )
{
log_error( &logger, " Default configuration." );
for ( ; ; );
}
log_info( &logger, " Application Task");
}
void application_task ( void )
{
log_printf ( &logger, "\r\n Driving motor clockwise \r\n" );
for ( uint8_t speed = BRUSHLESS26_SPEED_MIN; speed <= BRUSHLESS26_SPEED_MAX; speed += 20 )
{
log_printf ( &logger, " Speed gain: %u\r\n", ( uint16_t ) speed );
if ( BRUSHLESS26_OK != brushless26_drive_motor ( &brushless26, BRUSHLESS26_DIR_CW, speed, 2000 ) )
{
log_error ( &logger, " Drive motor " );
}
}
Delay_ms ( 1000 );
log_printf ( &logger, "\r\n Driving motor counter-clockwise \r\n" );
for ( uint8_t speed = BRUSHLESS26_SPEED_MIN; speed <= BRUSHLESS26_SPEED_MAX; speed += 20 )
{
log_printf ( &logger, " Speed gain: %u\r\n", ( uint16_t ) speed );
if ( BRUSHLESS26_OK != brushless26_drive_motor ( &brushless26, BRUSHLESS26_DIR_CCW, speed, 2000 ) )
{
log_error ( &logger, " Drive motor " );
}
}
Delay_ms ( 1000 );
}
void main ( void )
{
application_init( );
for ( ; ; )
{
application_task( );
}
}
// ------------------------------------------------------------------------ END
