H-Bridge 14 Click

How does it work?

H-Bridge 14 Click is based on the DRV8873, an automotive H-Bridge motor driver from Texas Instruments. It uses two logic inputs to control the H-Bridge driver, which consists of four N-channel MOSFETs. Those MOSFETs drive motors bi-directionally with up to 10A peak current. The motor has a configurable motor interface, a PH/EN or PWM, and an independent half-bridge control. The selection can be made over the software and the host MCU. The motor driver integrates current sensing and features proportional current output. It also features protections such as VM under-voltage lockout, charge pump undervoltage, overcurrent protection, open load detection, thermal shutdown, fault conditions, and more. The power supply for the motor can be selected between the external and the 5V from the mikroBUS™ power rail.

H-Bridge 14 Click uses a standard 4-wire SPI serial interface to communicate with the host MCU. Two control inputs are labeled IN1 and IN2. The onboard PCA9538 8-bit I/O port from NXP controls the sleep and bridge disable inputs. It also monitors the fault indication pin of the motor driver and interrupts the host MCU over the INT pin. The I2C address of the PCA9538 can be set over the ADDR SEL jumper. This I/O port can be reset over the RST pin.

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.

Specifications

Pinout diagram

This table shows how the pinout on H-Bridge 14 Click corresponds to the pinout on the mikroBUS™ socket (the latter shown in the two middle columns).

Notes	Pin					Pin	Notes
Driver Control	IN2	1	AN	PWM	16	IN1	Driver Control
Reset / ID SEL	RST	2	RST	INT	15	INT	Interrupt
SPI Select / ID COMM	CS	3	CS	RX	14	NC
SPI Clock	SCK	4	SCK	TX	13	NC
SPI Data OUT	SDO	5	MISO	SCL	12	SCL	I2C Clock
SPI Data IN	SDI	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

H-Bridge 14 Click electrical specifications

Software Support

We provide a library for the H-Bridge 14 Click as well as a demo application (example), developed using MIKROE compilers. The demo can run on all the main MIKROE development boards.

Package can be downloaded/installed directly from NECTO Studio Package Manager (recommended), downloaded from our LibStock™ or found on Mikroe github account.

Library Description

This library contains API for H-Bridge 14 Click driver.

Key functions

• hbridge14_set_pins H-Bridge 14 set pins function.

• hbridge14_sleep_state H-Bridge 14 control sleep function.

• hbridge14_drive_motor H-Bridge 14 drive motor function.

Example Description

This example demonstrates the use of the H-Bridge 14 board by driving the motor in both directions with braking and coasting in between.

void application_task ( void )
{
    uint8_t fault_status = 0;

    hbridge14_drive_motor( &hbridge14, HBRIDGE14_DRIVE_MOTOR_CW );
    log_printf( &logger, " Driving motor Clockwise rn" );
    hbridge14_register_read( &hbridge14, HBRIDGE14_REG_FAULT_STATUS, &fault_status );
    log_printf( &logger, " Fault status : 0x%.2X rn", ( uint16_t ) fault_status );
    Delay_ms( 5000 );

    hbridge14_drive_motor( &hbridge14, HBRIDGE14_DRIVE_MOTOR_BRAKE );
    log_printf( &logger, " Brake is on rn" );
    hbridge14_register_read( &hbridge14, HBRIDGE14_REG_FAULT_STATUS, &fault_status );
    log_printf( &logger, " Fault status : 0x%.2X rn", ( uint16_t ) fault_status );
    Delay_ms( 5000 );

    hbridge14_drive_motor( &hbridge14, HBRIDGE14_DRIVE_MOTOR_CCW );
    log_printf( &logger, " Driving motor counter-clockwise rn" );
    hbridge14_register_read( &hbridge14, HBRIDGE14_REG_FAULT_STATUS, &fault_status );
    log_printf( &logger, " Fault status : 0x%.2X rn", ( uint16_t ) fault_status );
    Delay_ms( 5000 );

    hbridge14_drive_motor( &hbridge14, HBRIDGE14_DRIVE_MOTOR_COASTING );
    log_printf( &logger, " Driving motor Coasting rn" );
    hbridge14_register_read( &hbridge14, HBRIDGE14_REG_FAULT_STATUS, &fault_status );
    log_printf( &logger, " Fault status : 0x%.2X rn", ( uint16_t ) fault_status );
    Delay_ms( 5000 );
}

The full application code, and ready to use projects can be installed directly from NECTO Studio Package Manager (recommended), downloaded from our LibStock™ or found on Mikroe github account.

Other Mikroe Libraries used in the example:

• MikroSDK.Board
• MikroSDK.Log
• Click.HBridge14

Additional notes and informations

Depending on the development board you are using, you may need USB UART click, 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 MIKROE compilers.

mikroSDK

This Click board™ is supported with mikroSDK – MIKROE 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.

For more information about mikroSDK, visit the official page.