Mikroelektronika d.o.o.
Gleichstrommotor 22 Click-Platine
Gleichstrommotor 22 Click-Platine
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Key Features:
- Treiber für einen oder zwei Gleichstrommotoren, UART-basierte Steuerung der Motorgeschwindigkeit und -richtung durch Einstellen der PWM-Spannung für jeden Motor, Steuerung der Motordrehmomentgrenze für beide Motoren, umfassender Schutz und Diagnose und mehr
- Basierend auf dem TMC7300 – einem für die Gleichstrommotorsteuerung optimierten Niederspannungstreiber von Analog Devices
- Kann zum Antrieb von DC-Bürstenmotoren verwendet werden und ist auf den Verbraucher- und Industriemarkt mit Endanwendungen für Niederspannungsgeräte ausgerichtet
- mikroBUS: I2C- und UART-Schnittstelle
Das DC Motor 22 Click Board™ ist eine kompakte Zusatzplatine, die einen Treiber für bürstenbehaftete Gleichstrommotoren enthält. Diese Platine verfügt über den TMC7300, einen Niederspannungstreiber für einen oder zwei Gleichstrommotoren von Analog Devices. Der TMC7300 ist für einen Betriebsspannungsbereich von 2 V bis 11 V ausgelegt und betreibt bis zu zwei Gleichstrommotoren über eine einfache UART-Steuerung für Richtung, Geschwindigkeit und Drehmoment. Es verfügt außerdem über einen vollständigen Satz an Diagnose- und Schutzfunktionen, die einen robusten und zuverlässigen Betrieb unterstützen, wie z. B. Schutz vor Erdschluss, Schutz vor Kurzschluss zur Stromversorgung und Unterspannungserkennung. Dieses Click Board™ eignet sich zum Antrieb von bürstenbehafteten Gleichstrommotoren und zielt auf den Verbraucher- und Industriemarkt mit Endanwendungen für Niederspannungsgeräte mit bis zu 2 A (2,4 A) Strom pro Motor.
Das DC Motor 22 Click Board™ wird von einer mikroSDK-kompatiblen Bibliothek unterstützt, die Funktionen enthält, die die Softwareentwicklung vereinfachen. Dieses Click Board™ wird als vollständig getestetes Produkt geliefert und ist bereit für den Einsatz auf einem System, das mit der mikroBUS™-Buchse ausgestattet ist.
How Does The DC Motor 22 Click Board™ Work?
The DC Motor 22 Click Board™ as its foundation uses the TMC7300, a low voltage driver optimized for DC motor control from Analog Devices. The TMC7300 features high power density using integrated power MOSFETs and a complete integrated DC motor control logic for speed control, torque limits, and torque-controlled operation. It is rated for an operating voltage range from 2V to 11V and covers a broad spectrum of embedded applications with up to 2A (2.4A peak) current per motor terminal. This advanced driver ensures efficient and reliable operation for cost-effective and highly competitive solutions.
As mentioned before, the TMC7300 operates via simple UART control, with the default baud rate of 115200bps for the data transfer, which allows the operation of two DC motors or a single motor with a double current. The motor is operated by an internal PWM generator, where the desired duty cycle is programmed via the UART interface. The PWM acts like a dedicated voltage source for the motor, providing complete control over motor velocity and direction by setting the PWM voltage for each motor. This interface also controls the motor torque limit for both motors by setting a common current limit, allowing overloading to be avoided during acceleration safely or when a motor is blocked.
There is an addition to the DC Motor 22 Click Board™'s current sensing capability for channels A and B. Based on the populated sense resistors R4 and R5 and the MAX11645 analogue-to-digital converter, the user can obtain information on the current value of the channels, processing this information via the I2C interface. In addition, it also uses several mikroBUS™ pins. The Enable feature through the EN pin routed to the PWM pin of the mikroBUS™ socket offers a switch operation to turn ON/OFF power delivery to the connected load, while the A0 and A1 pins routed to the AN and CS pins of the mikroBUS™ socket are used to select the UART interface address.
It also has a complete set of diagnostic and protection capabilities that supports robust and reliable operation, like short-to-ground protection, short-to-power supply protection, and under-voltage detection reported through the INT pin of the mikroBUS™ socket.
The DC Motor 22 Click Board™ can operate with both 3.3V and 5V logic voltage levels selected via the VIO SEL jumper. This way, it is allowed for both 3.3V and 5V capable MCUs to use the communication lines properly. However, the Click board™ comes equipped with a library that contains easy-to-use functions and an example code that can be used, as a reference, for further development.
SPECIFICATIONS
| Type | Brushed |
| Applications | Can be used for driving DC brushed motors and targeted at the consumer and industrial market with end applications to low voltage equipment |
| On-board modules | TMC7300 - low voltage driver optimized for DC motor control from Analog Devices |
| Key Features | Driver for one or two DC motors, UART based control over motor velocity and direction by setting PWM voltage for each motor, control motor torque limit for both motors, full protection and diagnostics, and more |
| Interface | I2C,UART |
| Compatibility | mikroBUS |
| Click board size | L (57.15 x 25.4 mm) |
| Input Voltage | 3.3V or 5V |
PINOUT DIAGRAM
This table shows how the pinout of the DC Motor 22 Click Board™ corresponds to the pinout on the mikroBUS™ socket (the latter shown in the two middle columns).
| Notes | Pin |  |
Pin | Notes | |||
|---|---|---|---|---|---|---|---|
| UART Address Selection | A0 | 1 | AN | PWM | 16 | EN | Enable |
| NC | 2 | RST | INT | 15 | INT | Diagnostic | |
| UART Address Selection | A1 | 3 | CS | RX | 14 | TX | UART TX |
| NC | 4 | SCK | TX | 13 | RX | UART RX | |
| NC | 5 | MISO | SCL | 12 | SCL | I2C Clock | |
| NC | 6 | MOSI | SDA | 11 | SDA | I2C Data | |
| Power Supply | 3.3V | 7 | 3.3V | 5V | 10 | 5V | Power Supply |
| Ground | GND | 8 | GND | GND | 9 | GND | Ground |
ONBOARD SETTINGS AND INDICATORS
| Label | Name | Default | Description |
|---|---|---|---|
| LD1 | PWR | - | Power LED Indicator |
| JP1 | VIO SEL | Left | Logic Level Voltage Selection 3V3/5V: Left position 3V3, Right position 5V |
DC MOTOR 22 CLICK ELECTRICAL SPECIFICATIONS
| Description | Min | Typ | Max | Unit |
|---|---|---|---|---|
| Supply Voltage | 3.3 | - | 5 | V |
| External Supply Voltage Range | 2 | - | 11 | V |
| Maximum Output Current | - | - | 2 | A |
| Operating Temperature Range | -40 | +25 | +120 | °C |
Software Support
We provide a library for the DC Motor 22 Click Board™ as well as a demo application (example), developed using MikroElektronika compilers. The demo can run on all the main MikroElektronika development boards.
The package can be downloaded/installed directly from NECTO Studio The package Manager (recommended), downloaded from our LibStock™ or found on the MikroE Github account.
Library Description
This library contains API for the DC Motor 22 Click Board™ driver.
Key functions
-
dcmotor22_set_motor_pwmThis function sets the PWM duty cycle of the selected motor. -
dcmotor22_get_motor_currentThis function reads the current consumption of the selected motor. -
dcmotor22_reset_deviceThis function resets the device by toggling the EN pin state.
Example Description
This example demonstrates the use of the DC Motor 22 Click Board™ by controlling the speed of both motors over the PWM duty cycle as well as displaying the motor's current consumption.
void application_task ( void )
{
static int16_t pwm_duty = 0;
static int8_t pwm_duty_step = 50;
float current;
log_printf ( &logger, " Motor Arn" );
if ( DCMOTOR22_OK == dcmotor22_set_motor_pwm ( &dcmotor22, DCMOTOR22_MOTOR_A, pwm_duty ) )
{
log_printf ( &logger, " PWM duty: %drn", pwm_duty );
}
Delay_ms ( 2000 );
if ( DCMOTOR22_OK == dcmotor22_get_motor_current ( &dcmotor22, DCMOTOR22_MOTOR_A, ¤t ) )
{
log_printf ( &logger, " Current: %.3f Arnn", current );
}
Delay_ms ( 500 );
log_printf ( &logger, " Motor Brn" );
if ( DCMOTOR22_OK == dcmotor22_set_motor_pwm ( &dcmotor22, DCMOTOR22_MOTOR_B, pwm_duty ) )
{
log_printf ( &logger, " PWM duty: %drn", pwm_duty );
}
Delay_ms ( 2000 );
if ( DCMOTOR22_OK == dcmotor22_get_motor_current ( &dcmotor22, DCMOTOR22_MOTOR_B, ¤t ) )
{
log_printf ( &logger, " Current: %.3f Arnn", current );
}
Delay_ms ( 500 );
if ( ( ( pwm_duty + pwm_duty_step ) > DCMOTOR22_MAX_PWM ) || ( ( pwm_duty + pwm_duty_step ) < DCMOTOR22_MIN_PWM ) )
{
pwm_duty_step = -pwm_duty_step;
}
pwm_duty += pwm_duty_step;
}
The full application code and ready-to-use projects can be installed directly from NECTO Studio The package Manager (recommended), downloaded from our LibStock™ or found on the MikroE Github account.
Other MikroE Libraries used in the example:
- MikroSDK.Board
- MikroSDK.Log
- Click.DCMotor22
Additional Notes and Information
Depending on the development board you are using, you may need a USB UART Click Board™, USB UART 2 Click or RS232 Click to connect to your PC, for development systems with no UART to USB interface available on the board. UART terminal is available in all MikroElektronika compilers.
MIKROSDK
The DC Motor 22 Click Board™ is supported with mikroSDK - MikroElektronika Software Development Kit. To ensure proper operation of mikroSDK compliant Click board™ demo applications, mikroSDK should be downloaded from the LibStock and installed for the compiler you are using.
Gleichstrommotor 22 Click-Platine
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