Stepper 4 click

Stepper 4 click carries the TB67S269FTG, a two-phase bipolar stepping motor driver from Toshiba. The click is designed to run on either 3.3V or 5V power supply. It communicates with the target microcontroller over the following pins on the mikroBUS™ line: AN, RST, CS, PWM, INT.

How the click works

There is a connector with two screw terminals used for connecting external DC supply.

The other four connectors are used for connecting the stepper motor to the click. After a motor is connected, it can be controlled by the MCU through the Stepper 4 click.

The onboard potentiometer is used to set the motor's torque.

TB67S269FTG features

The TB67S269 is a two-phase bipolar stepping motor driver from Toshiba.

Step mode selector

There are several different resolutions a stepper motor can use - a full step, half a step, etc. The driver on this click also allows different resolutions, from a full step to 1/32 of a step.

Specifications

Pinout diagram

This table shows how the pinout on Stepper 4 click corresponds to the pinout on the mikroBUS™ socket (the latter shown in the two middle columns).

Notes	Pin					Pin	Notes
Rotation direction	DIR	1	AN	PWM	16	ST	Stepping pin
Reset	RST	2	RST	INT	15	INT	Interrupt
Enable pin	EN	3	CS	TX	14	NC
	NC	4	SCK	RX	13	NC
	NC	5	MISO	SCL	12	NC
	NC	6	MOSI	SDA	11	NC
Power supply	+3.3V	7	3.3V	5V	10	+5V	Power supply
Ground	GND	8	GND	GND	9	GND	Ground

Jumpers and settings

Programming

Code examples for Stepper 4 click, written for MikroElektronika hardware and compilers are available on Libstock.

Code snippet

The following code snippet shows how the Stepper 4 click moves a stepper motor.

Firstly, the speed is set to 400 steps per revolution. Afterwards, the acceleration and the deceleration rate is set. The STEPPER_step method moves the motor a given number of steps. When the number is negative, the motor moves counterclockwise, otherwise, it moves clockwise.

So in this example, it first moves 1000 steps to the left, and then 1000 to the right, at different speeds.

1 void Stepper_4_Task()
2 {
3     STEPPER_setSpeed( 400 );
4     STEPPER_setAcc( 10 );
5     STEPPER_setDec( 5 );
6     STEPPER_step( -1000 );
7     STEPPER_setSpeed( 600 );
8     STEPPER_step( 1000 );
9 }

Downloads

 LibStock: Stepper 4 click library