Intermediate
30 min

Seize control and dominate the motion of your BLDC with STSPIN233 and PIC18F57Q43

Experience the future of motor control

STSPIN233 Click with Curiosity Nano with PIC18F57Q43

Published Feb 13, 2024

Click board™

STSPIN233 Click

Dev. board

Curiosity Nano with PIC18F57Q43

Compiler

NECTO Studio

MCU

PIC18F57Q43

Experience enhanced responsiveness and accuracy with our advanced brushless motor control, perfect for robotics, drones, and industrial automation

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Hardware Overview

How does it work?

STSPIN233 Click is based on the STSPIN233, a low voltage 3-phase integrated motor driver from STMicroelectronics. It contains three independent H-Bridges, each controlling one phase of the brushless motor. These integrated H-Bridges are very efficient - with an ON resistance of approximately 400mΩ (HS+LS) across each bridge. These features make STSPIN233 click perfectly suited for the rapid development of various battery-powered stepper motor applications, including toys, printers, mechatronics, drones, robotics-related applications, and more. Besides the brushless driver IC, this Click board™ also has STM32F031K6T6 MCU onboard, which serves as a “brain” of the STSPIN233 Click. It comes with preloaded firmware, which is programmed to take

control of the motor driver. It reads the current motor status and signals from an optional rotary encoder, calculates desired and real motor status values in real time, and makes necessary corrections to the motor driver. The motor can be controlled using RST, INT, and UART pins – RX and TX. That way, a very reliable brushless motor driver is achieved. The RST pin of the STSPIN233 Click is used to set both bridge outputs in the HIGH-Z mod, disconnecting the power supply from the H-Bridges. This pin allows lower average power consumption as no current can flow from the power supply to the motor. This pin is routed to the RST pin of the mikroBUS™. The INT pin has a double purpose: when set to a high logic level, it acts as a chip enable, allowing the device to

operate. In the case of a fault condition on the IC, it will be asserted to a LOW logic level, acting as an interrupt pin. A restart attempt will be made after a timeout period defined by the external capacitor and resistor values. This pin is routed to both INT pins of the mikroBUS™, allowing the host MCU to use both functions. The mentioned pin is labeled as FLT on the Click board™ respectively. The motor power supply can be connected to the input terminal labeled as VIN and should be within the range of 1.8V to 10V. Brushless motor coils can be connected to U, V, and W terminals. The Click board™ requires an external power supply for the motor to work. However, it also requires 3.3V from the mikroBUS™ rail.

STSPIN233 Click hardware overview image

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.

PIC18F57Q43 Curiosity Nano double side image

Microcontroller Overview

MCU Card / MCU

default

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.

Curiosity Nano Base for Click boards accessories 1 image

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.

STSPIN233 Click accessories image

Used MCU Pins

mikroBUS™ mapper

NC
NC
AN
Reset
PA7
RST
NC
NC
CS
NC
NC
SCK
NC
NC
MISO
NC
NC
MOSI
Power Supply
3.3V
3.3V
Ground
GND
GND
NC
NC
PWM
Fault Interrupt
PA6
INT
UART RX
PC3
TX
UART TX
PC2
RX
NC
NC
SCL
NC
NC
SDA
Power Supply
5V
5V
Ground
GND
GND
1

Take a closer look

Click board™ Schematic

STSPIN233 Click Schematic schematic

Step by step

Project assembly

Curiosity Nano Base for Click boards front image hardware assembly

Start by selecting your development board and Click board™. Begin with the Curiosity Nano with PIC18F57Q43 as your development board.

Curiosity Nano Base for Click boards front image hardware assembly
Charger 27 Click front image hardware assembly
PIC18F47Q10 Curiosity Nano front image hardware assembly
Prog-cut hardware assembly
Charger 27 Click complete accessories setup image hardware assembly
Board mapper by product8 hardware assembly
Necto image step 2 hardware assembly
Necto image step 3 hardware assembly
Necto image step 4 hardware assembly
Necto image step 5 hardware assembly
Necto image step 6 hardware assembly
PIC18F57Q43 Curiosity MCU Step hardware assembly
Necto No Display image step 8 hardware assembly
Necto image step 9 hardware assembly
Necto image step 10 hardware assembly
Debug Image Necto Step hardware assembly

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 STPSIN233 Click driver.

Key functions:

  • stspin233_send_single_cmd - Send single command

  • stspin233_send_double_cmd - Send double command

  • stspin233_get_int_state - Get INT pin 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 
 * \brief Stspin233 Click example
 * 
 * # Description
 * This application is motor driver.
 *
 * The demo application is composed of two sections :
 * 
 * ## Application Init 
 * Initializes driver and configures the Click board.
 * 
 * ## Application Task  
 * This example demonstrates the use of STSPIN233 Click board, by running the motor clockwise and counter clockwise.
 * All results will be displayed on USB UART.
 * 
 * *note:* 
 * For all other commands that you can use to control your engine, 
 * see the firmware documentation. We used an 8 pole motor for the test.
 * 
 * \author MikroE Team
 *
 */
// ------------------------------------------------------------------- INCLUDES

#include "board.h"
#include "log.h"
#include "stspin233.h"
#include "string.h"

#define PROCESS_COUNTER 10
#define PROCESS_RX_BUFFER_SIZE 500
#define PROCESS_PARSER_BUFFER_SIZE 500
// ------------------------------------------------------------------ VARIABLES

static stspin233_t stspin233;
static log_t logger;

static char current_parser_buf[ PROCESS_PARSER_BUFFER_SIZE ];

// ------------------------------------------------------- ADDITIONAL FUNCTIONS

static void stspin233_process ( void )
{
    int32_t rsp_size;
    uint16_t rsp_cnt = 0;
    
    char uart_rx_buffer[ PROCESS_RX_BUFFER_SIZE ] = { 0 };
    uint16_t check_buf_cnt; 
    uint8_t process_cnt = PROCESS_COUNTER;
    
    // Clear parser buffer
    memset( current_parser_buf, 0 , PROCESS_PARSER_BUFFER_SIZE ); 
    
    while( process_cnt != 0 )
    {
        rsp_size = stspin233_generic_read( &stspin233, &uart_rx_buffer, PROCESS_RX_BUFFER_SIZE );

        if ( rsp_size > 0 )
        {  
            // Validation of the received data
            for ( check_buf_cnt = 0; check_buf_cnt < rsp_size; check_buf_cnt++ )
            {
                if ( uart_rx_buffer[ check_buf_cnt ] == 0 ) 
                {
                    uart_rx_buffer[ check_buf_cnt ] = 13;
                }
            }
            
            // Storages data in parser buffer
            rsp_cnt += rsp_size;
            if ( rsp_cnt < PROCESS_PARSER_BUFFER_SIZE )
            {
                strncat( current_parser_buf, uart_rx_buffer, rsp_size );
            }
        
            // Clear RX buffer
            memset( uart_rx_buffer, 0, PROCESS_RX_BUFFER_SIZE );
        } 
        else 
        {
            process_cnt--;
            
            // Process delay 
            Delay_100ms( );
        }
    }
}
// ------------------------------------------------------ APPLICATION FUNCTIONS

void application_init ( void )
{
    log_cfg_t log_cfg;
    stspin233_cfg_t cfg;

    /** 
     * 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.

    stspin233_cfg_setup( &cfg );
    STSPIN233_MAP_MIKROBUS( cfg, MIKROBUS_1 );
    stspin233_init( &stspin233, &cfg );

    stspin233_default_cfg( &stspin233 );
}

void application_task ( void )
{
    log_printf( &logger, ">>> START MOTOR\r\n" );
    stspin233_send_single_cmd( &stspin233, STSPIN233_CMD_START_MOTOR );
    stspin233_process( );
    Delay_ms ( 1000 );
    Delay_ms ( 1000 );
    
    log_printf( &logger, ">>> Set clockwise direction\r\n" );
    stspin233_send_double_cmd( &stspin233, STSPIN233_CMD_DIR_MOTOR, STSPIN233_CW_DIR );
    stspin233_process( );
    Delay_ms ( 1000 );
    Delay_ms ( 1000 );
    
    log_printf( &logger, ">>> Set counter clockwise direction\r\n" );
    stspin233_send_double_cmd( &stspin233, STSPIN233_CMD_DIR_MOTOR, STSPIN233_CCW_DIR );
    stspin233_process( );
    Delay_ms ( 1000 );
    Delay_ms ( 1000 );
    
    log_printf( &logger, ">>> STOP MOTOR\r\n" );
    stspin233_send_single_cmd( &stspin233, STSPIN233_CMD_STOP_MOTOR );
    stspin233_process( );
    Delay_ms ( 1000 );
    Delay_ms ( 1000 );
    
    stspin233_send_single_cmd( &stspin233, STSPIN233_CMD_STATUS );
    stspin233_process( );
    log_printf( &logger, ">>> STATUS: %.5s\r\n", &current_parser_buf[ 9 ] );
    Delay_ms ( 1000 );
    Delay_ms ( 1000 );
    log_printf( &logger, "------------------------------\r\n" );
}

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

Additional Support

Resources

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