This start-up guide explains how to connect your Raspberry Pi 3 to the TMC5160-BOB – the breakout board of the brand new TMC5160. We’ll be using the internal Motion Controller and +3V3 logic supply for the TMC5160. The wiring will be limited to the basic functionality to communicate via SPI. The usage of the TRINAMIC’s API – TMC-API – is minimizing the software effort.

Preparation

In this tutorial we are using a fresh Raspbian Stretch System (Version November 2017 – Release date 2017-11-29) with the latest updates:

sudo apt update
 
sudo apt upgrade

sudo apt update

sudo apt upgrade

Download and install the bcm2835 library. Note XXX is a placeholder for the latest version. For this guide version “1.52” was used. In this case, XXX is replaced by “1.52”. You can check the latest version by scrolling to the bottom of the following page: http://www.airspayce.com/mikem/bcm2835/

wget http://www.airspayce.com/mikem/bcm2835/bcm2835-XXX.tar.gz

tar zxvf bcm2835-XXX.tar

cd bcm2835-XXX

./configure

make

sudo make check

sudo make install

wget http://www.airspayce.com/mikem/bcm2835/bcm2835-XXX.tar.gz

tar zxvf bcm2835-XXX.tar

cd bcm2835-XXX

./configure

make

sudo make check

sudo make install

Create a project folder and download the latest TMC-API. Note X.XX is a placeholder for the latest version. For this guide version “3.02” was used. In this case, X.XX is replaced by “3.02”. You can check the latest version by scrolling to the bottom of the following page: https://www.trinamic.com/support/software/access-package/

mkdir ~/TMC_EXAMPLE

cd ~/TMC_EXAMPLE

wget https://www.trinamic.com/fileadmin/assets/Products/Eval_Software/TMC-API_Release_vX.XX.zip

unzip TMC-API_Release_vX.XX.zip

mv TMC-API_Release_vX.XX TMC-API

mkdir ~/TMC_EXAMPLE

cd ~/TMC_EXAMPLE

wget https://www.trinamic.com/fileadmin/assets/Products/Eval_Software/TMC-API_Release_vX.XX.zip

unzip TMC-API_Release_vX.XX.zip

mv TMC-API_Release_vX.XX TMC-API

Wiring

The wiring is very simple. You will need 8 jumper wires. As a reference you can use the TMC5160-BOB_datasheet_Rev1.0.pdf. You will find the signals that are on each pin.

Signal	Raspberry Pi 3	TMC5160-BOB
VCC_IO	GPIO02 (3)	VCC_IO (1)
GND	GND (39)	GND (2)
SPI Chip select (CS)	SPI0 CE0 N (24)	CSN (3)
SPI CLK	SPI0 SCLK (23)	SCK (4)
MOSI	SPI0 MOSI (19)	SDI (5)
MISO	SPI0 MISO (21)	SDO (6)
TMC5160 CLK	GPIO04 (7)	CLK (8)
TMC5160 DRV_ENN	GPIO03 (5)	DRV_ENN (9)

Raspberry Pi 3 GPIO Header – Source: https://www.element14.com/community/docs/DOC-73950/l/raspberry-pi-3-model-b-gpio-40-pin-block-pinout

Raspberry Pi Code

An example code to initialize the TMC5160 is shown below. These files need to be placed in the same project folder as the TMC-API, in this case into ~/TMC_EXAMPLE. First, +3.3V is supplied to VCC_IO, the driver stages are enabled by pulling down DRV_ENN and the internal clock is used by pulling down CLK16. Afterwards, the TMC5160 is initialized and a simple move to position cycle is executed. The sequence will rotate a 200 full stepper motor 10 revolutions clockwise and 10 revolutions counterclockwise – depending on the wiring of the stepper motor. Please refer to the TMC5160 datasheet or the TMCL-IDE as a reference for the different registers.

You can also download the source files directly with your Pi:

cd ~/TMC_EXAMPLE

wget http://blog.trinamic.com/wp-content/uploads/2018/01/TMC5160_TMCAPI_EXAMPLE.tar.gz

tar zxvf TMC5160_TMCAPI_EXAMPLE.tar.gz

cd ~/TMC_EXAMPLE

wget http://blog.trinamic.com/wp-content/uploads/2018/01/TMC5160_TMCAPI_EXAMPLE.tar.gz

tar zxvf TMC5160_TMCAPI_EXAMPLE.tar.gz

#include <stdio.h>
#include <wiringPi.h>
#include <bcm2835.h>
#include "SPI_TMC.h"

// Include the IC(s) you want to use
#include "TMC-API/tmc/ic/TMC5160/TMC5160.h"

#define MOTOR0			0 // Motor 0

void resetMotorDrivers(uint8 motor);

int main(int argc, char **argv) {
	if (!bcm2835_init())
      return 1;

	wiringPiSetupGpio();
  	
	// Initiate SPI 
	bcm2835_spi_begin();
	bcm2835_spi_setBitOrder(BCM2835_SPI_BIT_ORDER_MSBFIRST); // MSB first
  	bcm2835_spi_setDataMode(BCM2835_SPI_MODE3); // SPI Mode 3
  	bcm2835_spi_setClockDivider(BCM2835_SPI_CLOCK_DIVIDER_256); // 1 MHz clock
  	bcm2835_spi_chipSelect(BCM2835_SPI_CS0); // define CS pin
	bcm2835_spi_setChipSelectPolarity(BCM2835_SPI_CS0, LOW); // set CS polarity to low
	

	/***** TMC5160-BOB Example *****/
	pinMode(2, OUTPUT);
	digitalWrite(2, HIGH); // Apply VCC_IO voltage to Motor 0
	pinMode(3, OUTPUT);
	digitalWrite(3, LOW); // Use internal clock
	pinMode(4, OUTPUT);
	digitalWrite(4, LOW); // Enable driver stage

	resetMotorDrivers(MOTOR0);

	// MULTISTEP_FILT=1, EN_PWM_MODE=1 enables stealthChop™
	tmc5160_writeInt(MOTOR0, TMC5160_GCONF, 0x0000000C);

	// TOFF=3, HSTRT=4, HEND=1, TBL=2, CHM=0 (spreadCycle™)
	tmc5160_writeInt(MOTOR0, TMC5160_CHOPCONF, 0x000100C3);

	// IHOLD=8, IRUN=15 (max. current), IHOLDDELAY=6
	tmc5160_writeInt(MOTOR0, TMC5160_IHOLD_IRUN, 0x00080F0A);

	// TPOWERDOWN=10: Delay before power down in stand still
	tmc5160_writeInt(MOTOR0, TMC5160_TPOWERDOWN, 0x0000000A);

	// TPWMTHRS=500
	tmc5160_writeInt(MOTOR0, TMC5160_TPWMTHRS, 0x000001F4); 

	// Values for speed and acceleration
	tmc5160_writeInt(MOTOR0, TMC5160_VSTART, 1);
	tmc5160_writeInt(MOTOR0, TMC5160_A1, 5000);
	tmc5160_writeInt(MOTOR0, TMC5160_V1, 26843);
	tmc5160_writeInt(MOTOR0, TMC5160_AMAX, 5000);   
	tmc5160_writeInt(MOTOR0, TMC5160_VMAX, 100000);
	tmc5160_writeInt(MOTOR0, TMC5160_DMAX, 5000);
	tmc5160_writeInt(MOTOR0, TMC5160_D1, 5000);
	tmc5160_writeInt(MOTOR0, TMC5160_VSTOP, 10);
	tmc5160_writeInt(MOTOR0, TMC5160_RAMPMODE, TMC5160_MODE_POSITION);

	while(1)
	{
		// put your main code here, to run repeatedly:
		printf("Reply of TMC5160: 0x%08x\n", tmc5160_readInt(MOTOR0, TMC5160_XACTUAL));
		tmc5160_writeInt(MOTOR0, TMC5160_XTARGET, 0x0007D000);
		//XTARGET = 512000 -> 10 revolutions with micro step = 256
		
		delay(12000);
		
		printf("Reply of TMC5160: 0x%08x\n", tmc5160_readInt(MOTOR0, TMC5160_XACTUAL));
		tmc5160_writeInt(MOTOR0, TMC5160_XTARGET, 0x00000000); //XTARGET=0
		
		delay(12000);
	}

	// End SPI communication
  	bcm2835_spi_end();
   	bcm2835_close();

	return 0;
}

void resetMotorDrivers(uint8 motor)
{
	if(!tmc5160_readInt(MOTOR0, TMC5160_VACTUAL)) 
	{
		digitalWrite(2, LOW); // Apply VCC_IO voltage to Motor 0
		delay(10);
		digitalWrite(2, HIGH); // Apply VCC_IO voltage to Motor 0
		delay(10);
	}
}

#include <stdio.h>

#include <wiringPi.h>

#include <bcm2835.h>

#include "SPI_TMC.h"

// Include the IC(s) you want to use

#include "TMC-API/tmc/ic/TMC5160/TMC5160.h"

#define MOTOR0 0 // Motor 0

void resetMotorDrivers(uint8 motor);

int main(int argc, char **argv) {

if (!bcm2835_init())

return 1;

wiringPiSetupGpio();

// Initiate SPI

bcm2835_spi_begin();

bcm2835_spi_setBitOrder(BCM2835_SPI_BIT_ORDER_MSBFIRST); // MSB first

bcm2835_spi_setDataMode(BCM2835_SPI_MODE3); // SPI Mode 3

bcm2835_spi_setClockDivider(BCM2835_SPI_CLOCK_DIVIDER_256); // 1 MHz clock

bcm2835_spi_chipSelect(BCM2835_SPI_CS0); // define CS pin

bcm2835_spi_setChipSelectPolarity(BCM2835_SPI_CS0, LOW); // set CS polarity to low

/***** TMC5160-BOB Example *****/

pinMode(2, OUTPUT);

digitalWrite(2, HIGH); // Apply VCC_IO voltage to Motor 0

pinMode(3, OUTPUT);

digitalWrite(3, LOW); // Use internal clock

pinMode(4, OUTPUT);

digitalWrite(4, LOW); // Enable driver stage

resetMotorDrivers(MOTOR0);

// MULTISTEP_FILT=1, EN_PWM_MODE=1 enables stealthChop™

tmc5160_writeInt(MOTOR0, TMC5160_GCONF, 0x0000000C);

// TOFF=3, HSTRT=4, HEND=1, TBL=2, CHM=0 (spreadCycle™)

tmc5160_writeInt(MOTOR0, TMC5160_CHOPCONF, 0x000100C3);

// IHOLD=8, IRUN=15 (max. current), IHOLDDELAY=6

tmc5160_writeInt(MOTOR0, TMC5160_IHOLD_IRUN, 0x00080F0A);

// TPOWERDOWN=10: Delay before power down in stand still

tmc5160_writeInt(MOTOR0, TMC5160_TPOWERDOWN, 0x0000000A);

// TPWMTHRS=500

tmc5160_writeInt(MOTOR0, TMC5160_TPWMTHRS, 0x000001F4);

// Values for speed and acceleration

tmc5160_writeInt(MOTOR0, TMC5160_VSTART, 1);

tmc5160_writeInt(MOTOR0, TMC5160_A1, 5000);

tmc5160_writeInt(MOTOR0, TMC5160_V1, 26843);

tmc5160_writeInt(MOTOR0, TMC5160_AMAX, 5000);

tmc5160_writeInt(MOTOR0, TMC5160_VMAX, 100000);

tmc5160_writeInt(MOTOR0, TMC5160_DMAX, 5000);

tmc5160_writeInt(MOTOR0, TMC5160_D1, 5000);

tmc5160_writeInt(MOTOR0, TMC5160_VSTOP, 10);

tmc5160_writeInt(MOTOR0, TMC5160_RAMPMODE, TMC5160_MODE_POSITION);

while(1)

{

// put your main code here, to run repeatedly:

printf("Reply of TMC5160: 0x%08x\n", tmc5160_readInt(MOTOR0, TMC5160_XACTUAL));

tmc5160_writeInt(MOTOR0, TMC5160_XTARGET, 0x0007D000);

//XTARGET = 512000 -> 10 revolutions with micro step = 256

delay(12000);

printf("Reply of TMC5160: 0x%08x\n", tmc5160_readInt(MOTOR0, TMC5160_XACTUAL));

tmc5160_writeInt(MOTOR0, TMC5160_XTARGET, 0x00000000); //XTARGET=0

delay(12000);

}

// End SPI communication

bcm2835_spi_end();

bcm2835_close();

return 0;

}

void resetMotorDrivers(uint8 motor)

{

if(!tmc5160_readInt(MOTOR0, TMC5160_VACTUAL))

{

digitalWrite(2, LOW); // Apply VCC_IO voltage to Motor 0

delay(10);

digitalWrite(2, HIGH); // Apply VCC_IO voltage to Motor 0

delay(10);

}

/*
 * SPI_TMC.h
 *
 *  Created on: 12.01.2018
 *      Author: MN
 */
#ifndef SPI_TMC_H
#define SPI_TMC_H

#include "TMC-API/tmc/helpers/API_Header.h"

void initSPI(void);

// TMC5160 SPI wrapper
void tmc5160_writeDatagram(uint8 motor, uint8 address, uint8 x1, uint8 x2, uint8 x3, uint8 x4);
void tmc5160_writeInt(uint8 motor, uint8 address, int value);
int tmc5160_readInt(u8 motor, uint8 address);

// General SPI functions
void tmc40bit_writeInt(u8 motor, uint8 address, int value);
int tmc40bit_readInt(u8 motor, uint8 address);

#endif /* SPI_TMC_H */

* SPI_TMC.h

* Created on: 12.01.2018

* Author: MN

#ifndef SPI_TMC_H

#define SPI_TMC_H

#include "TMC-API/tmc/helpers/API_Header.h"

void initSPI(void);

// TMC5160 SPI wrapper

void tmc5160_writeDatagram(uint8 motor, uint8 address, uint8 x1, uint8 x2, uint8 x3, uint8 x4);

void tmc5160_writeInt(uint8 motor, uint8 address, int value);

int tmc5160_readInt(u8 motor, uint8 address);

// General SPI functions

void tmc40bit_writeInt(u8 motor, uint8 address, int value);

int tmc40bit_readInt(u8 motor, uint8 address);

#endif /* SPI_TMC_H */

#include <bcm2835.h>
#include "SPI_TMC.h"


// TMC5160 SPI wrapper
void tmc5160_writeDatagram(uint8 motor, uint8 address, uint8 x1, uint8 x2, uint8 x3, uint8 x4)
{
    int value = x1;
	value <<= 8;
	value |= x2;
	value <<= 8;
	value |= x3;
	value <<= 8;
	value |= x4;

    tmc40bit_writeInt(motor, address, value);
}

void tmc5160_writeInt(uint8 motor, uint8 address, int value)
{
    tmc40bit_writeInt(motor, address, value);
}

int tmc5160_readInt(u8 motor, uint8 address)
{
    tmc40bit_readInt(motor, address);
    return tmc40bit_readInt(motor, address);
}

// General SPI decription
void tmc40bit_writeInt(u8 motor, uint8 address, int value)
{
    char tbuf[5];
    tbuf[0] = address | 0x80;
    tbuf[1] = 0xFF & (value>>24);
    tbuf[2] = 0xFF & (value>>16);
    tbuf[3] = 0xFF & (value>>8);
    tbuf[4] = 0xFF & value;

    bcm2835_spi_writenb (tbuf, 5);
}

int tmc40bit_readInt(u8 motor, uint8 address)
{
    char tbuf[5], rbuf[5];
    int value;
	// clear write bit
	tbuf[0] = address & 0x7F;
    
    bcm2835_spi_transfernb (tbuf, rbuf, 5);

	value =rbuf[1];
	value <<= 8;
	value |= rbuf[2];
	value <<= 8;
	value |= rbuf[3];
	value <<= 8;
	value |= rbuf[4];

	return value;
}

#include <bcm2835.h>

#include "SPI_TMC.h"

// TMC5160 SPI wrapper

void tmc5160_writeDatagram(uint8 motor, uint8 address, uint8 x1, uint8 x2, uint8 x3, uint8 x4)

{

int value = x1;

value <<= 8;

value |= x2;

value <<= 8;

value |= x3;

value <<= 8;

value |= x4;

tmc40bit_writeInt(motor, address, value);

}

void tmc5160_writeInt(uint8 motor, uint8 address, int value)

{

tmc40bit_writeInt(motor, address, value);

}

int tmc5160_readInt(u8 motor, uint8 address)

{

tmc40bit_readInt(motor, address);

return tmc40bit_readInt(motor, address);

}

// General SPI decription

void tmc40bit_writeInt(u8 motor, uint8 address, int value)

{

char tbuf[5];

tbuf[0] = address | 0x80;

tbuf[1] = 0xFF & (value>>24);

tbuf[2] = 0xFF & (value>>16);

tbuf[3] = 0xFF & (value>>8);

tbuf[4] = 0xFF & value;

bcm2835_spi_writenb (tbuf, 5);

}

int tmc40bit_readInt(u8 motor, uint8 address)

{

char tbuf[5], rbuf[5];

int value;

// clear write bit

tbuf[0] = address & 0x7F;

bcm2835_spi_transfernb (tbuf, rbuf, 5);

value =rbuf[1];

value <<= 8;

value |= rbuf[2];

value <<= 8;

value |= rbuf[3];

value <<= 8;

value |= rbuf[4];

return value;

}

TARGET_EXEC ?= TMCAPI_EXAMPLE
BUILD_DIR ?= ./bin
CC = gcc
CXX = g++

# C Fags
CFLAGS			+= -Wall 
CFLAGS			+= -g
LDFLAGS			+= -lbcm2835 
LDFLAGS			+= -lwiringPi

# define the C source files
SRCS				+= main.c
SRCS				+= SPI_TMC.c
# used functions from TMC_API
SRCS				+= TMC-API/tmc/helpers/Debug.c
#SRCS 			+= TMC-API/tmc/ic/TMC2130/TMC2130.c
#SRCS 			+= TMC-API/tmc/ic/TMC2208/TMC2208.c
#SRCS 			+= TMC-API/tmc/ic/TMC2224/TMC2224.c
#SRCS 			+= TMC-API/tmc/ic/TMC2660/TMC2660.c
#SRCS 			+= TMC-API/tmc/ic/TMC5130/TMC5130.c
SRCS 			+= TMC-API/tmc/ic/TMC5160/TMC5160.c
#SRCS				+= TMC-API/tmc/ic/TMC4330/TMC4330.c
#SRCS				+= TMC-API/tmc/ic/TMC4331/TMC4331.c
#SRCS				+= TMC-API/tmc/ic/TMC4361/TMC4361.c
#SRCS				+= TMC-API/tmc/ic/TMC4361A/TMC4361A.c
#SRCS				+= TMC-API/tmc/ic/TMC4670/TMC4670.c
#SRCS				+= TMC-API/tmc/ic/TMC4671/TMC4671.c
#SRCS				+= TMC-API/tmc/ic/TMC4672/TMC4672.c
#SRCS				+= TMC-API/tmc/ic/TMCC160/TMCC160.c
#SRCS				+= TMC-API/tmc/ic/TMC5041/TMC5041.c
#SRCS				+= TMC-API/tmc/ic/TMC5062/TMC5062.c
#SRCS				+= TMC-API/tmc/ic/TMC5072/TMC5072.c

OBJS := $(SRCS:%=$(BUILD_DIR)/%.o)
DEPS := $(OBJS:.o=.d)

$(BUILD_DIR)/$(TARGET_EXEC): $(OBJS)
	$(CC) $(OBJS) -o $@ $(LDFLAGS)

# assembly
$(BUILD_DIR)/%.s.o: %.s
	$(MKDIR_P) $(dir $@)
	$(AS) $(ASFLAGS) -c $< -o $@ $(LDFLAGS)

# c source
$(BUILD_DIR)/%.c.o: %.c
	$(MKDIR_P) $(dir $@)
	$(CC) $(CPPFLAGS) $(CFLAGS) -c $< -o $@ $(LDFLAGS)

# c++ source
$(BUILD_DIR)/%.cpp.o: %.cpp
	$(MKDIR_P) $(dir $@)
	$(CXX) $(CPPFLAGS) $(CXXFLAGS) -c $< -o $@ $(LDFLAGS)


.PHONY: clean

clean:
	$(RM) -r $(BUILD_DIR)

-include $(DEPS)

MKDIR_P ?= mkdir -p

TARGET_EXEC ?= TMCAPI_EXAMPLE

BUILD_DIR ?= ./bin

CC = gcc

CXX = g++

# C Fags

CFLAGS += -Wall

CFLAGS += -g

LDFLAGS += -lbcm2835

LDFLAGS += -lwiringPi

# define the C source files

SRCS += main.c

SRCS += SPI_TMC.c

# used functions from TMC_API

SRCS += TMC-API/tmc/helpers/Debug.c

#SRCS += TMC-API/tmc/ic/TMC2130/TMC2130.c

#SRCS += TMC-API/tmc/ic/TMC2208/TMC2208.c

#SRCS += TMC-API/tmc/ic/TMC2224/TMC2224.c

#SRCS += TMC-API/tmc/ic/TMC2660/TMC2660.c

#SRCS += TMC-API/tmc/ic/TMC5130/TMC5130.c

SRCS += TMC-API/tmc/ic/TMC5160/TMC5160.c

#SRCS += TMC-API/tmc/ic/TMC4330/TMC4330.c

#SRCS += TMC-API/tmc/ic/TMC4331/TMC4331.c

#SRCS += TMC-API/tmc/ic/TMC4361/TMC4361.c

#SRCS += TMC-API/tmc/ic/TMC4361A/TMC4361A.c

#SRCS += TMC-API/tmc/ic/TMC4670/TMC4670.c

#SRCS += TMC-API/tmc/ic/TMC4671/TMC4671.c

#SRCS += TMC-API/tmc/ic/TMC4672/TMC4672.c

#SRCS += TMC-API/tmc/ic/TMCC160/TMCC160.c

#SRCS += TMC-API/tmc/ic/TMC5041/TMC5041.c

#SRCS += TMC-API/tmc/ic/TMC5062/TMC5062.c

#SRCS += TMC-API/tmc/ic/TMC5072/TMC5072.c

OBJS := $(SRCS:%=$(BUILD_DIR)/%.o)

DEPS := $(OBJS:.o=.d)

$(BUILD_DIR)/$(TARGET_EXEC): $(OBJS)

$(CC) $(OBJS) -o $@ $(LDFLAGS)

# assembly

$(BUILD_DIR)/%.s.o: %.s

$(MKDIR_P) $(dir $@)

$(AS) $(ASFLAGS) -c $< -o $@ $(LDFLAGS)

# c source

$(BUILD_DIR)/%.c.o: %.c

$(MKDIR_P) $(dir $@)

$(CC) $(CPPFLAGS) $(CFLAGS) -c $< -o $@ $(LDFLAGS)

# c++ source

$(BUILD_DIR)/%.cpp.o: %.cpp

$(MKDIR_P) $(dir $@)

$(CXX) $(CPPFLAGS) $(CXXFLAGS) -c $< -o $@ $(LDFLAGS)

.PHONY: clean

clean:

$(RM) -r $(BUILD_DIR)

-include $(DEPS)

MKDIR_P ?= mkdir -p

Compiling and running the code

Use the following command to compile the code.

cd ~/TMC_EXAMPLE

make

cd ~/TMC_EXAMPLE

make

Now you are able to execute this example.

sudo ~/TMCAPI_test/bin/TMCAPI_EXAMPLE

1	sudo ~/TMCAPI_test/bin/TMCAPI_EXAMPLE

Be aware that the motor runs as soon as you execute the program.

TMCL-IDE

TMC5160

TMC5160-BOB

TRINAMIC Technology Access Package -TMC-API

www.trinamic.com

9 Comments

Radek March 12, 2018 at 11:47 am Reply

Hello Mario,
Very nice example.
Will this API compile on Beaglebone or will work with Arduino either?
How about reading encoder pulses by this BOB module – any code is available in API?
And last question: how 5160-BOB is comparable to 2660-BOB – I mean about reading encoder pulses for close loop and also about powering stepper with 2.8A/phase?
Best regards

Mario Nolten March 15, 2018 at 1:55 pm Reply

Hi Radek,
yes, you can use this API also on a Beaglebone. You probably need to adapt the SPI function for the Beaglebone. On an Arduino it is not so easy to use. The Arduino IDE does not allow to have a folder structure as we have in our API.
For reading encoder pulses, you can directly connect the encoder to the TMC5160-BOB and read out the pulses from TMC5160_XENC. By setting the prescaler it shows directly the encoder position in microstep.
The TMC2660-BOB is a bit different. The TMC2660 is a plain driver IC (without integrated motion controller as the TMC5160 has) so you need to apply step/dir pulses to drive the motor and the encoder has to be connected directly to the MCU. For this we have no API code for a Raspberry Pi or Beaglebone, since it is for both crucial to have a realtime OS.
Best regards,
Mario

Radek March 19, 2018 at 6:02 pm Reply

Mario,
Thank you for valuable information.
This is a very interesting product. I needed some time to break through the documentation. At the beginning I will try to run in mode 2 with an external application and without collecting the signal from the encoder. Then I will try mode 1 and encoder. One more question: if two motion controllers are used for controlling axes X/Y (amateur laser cutter), then both of them must be addressed separately or is there some form of communication between them and the code can be simplified? Will I find the answer to this problem in the API or do I have to implement it myself? In addition, is there any documentation how to electrically connect several axes in such a system using 5160 so that the motion controllers cooperate?
Best regards
Radek

Mario Nolten March 23, 2018 at 2:57 pm Reply

Radek,
for controlling multiple axis / ICs, each one of them has to be addressed seperately. The API is currently working with 1 motor but it should be pretty easy to extend it to 2 or 3 axis. You should be able to reuse most of the code for the additional axis. The API is in continous progress and multiple axis control is on the agenda.
Best regards,
Mario

Radek March 23, 2018 at 5:02 pm

Mario,
I will try to do it then. I would like to make SPI communication using PRU on BBB. I will see how it will go. I do not know just what I can gain from SPI communication. Step/Dir is working very nice at PRU at this moment with BeagleG code from Henner Zeller for example or Replicape project (they using TMC2100 on a cape for BBB -they also use SPI but only for some chipset configuration). Is the use of SPI can improve something here or is it better to stay at TMC2660 with step/dir commands and save some bucks? What do you think?
Best regards
Radek
Mario Nolten March 23, 2018 at 6:15 pm

Radek,
using step/dir is probably more straight forward since the firmware is already written for this. For using the internal motion controller you would need to adapt it. BTW: You can also use the TMC5160 in step/dir to have all benefits like higher currents, stealthChop2™, differential current sensing, etc. In this case you only need the SPI to configure the run current, chopping mode (spreadCycle™ or stealthChop2™).
Best regards,
Mario

Radek March 23, 2018 at 6:56 pm Reply

Mario,
Yes, and this is the reason why I will probably stay with TMC5160. It has all the newest features compacted into one small chip, so for me is very versatile.
Thank you again and I let you know about the effects.
Either way, good job with this API.
Best regards and have a good weekend.
Radek
Marco April 3, 2018 at 8:07 pm Reply

Mistake: In the table Signal – Raspberry Pi 3 – TMC5160-BOB
SPI Chip select (CS) should be pin 24 on the Raspberry Pi

Mario Nolten April 4, 2018 at 3:55 pm Reply

Marco, thanks for the comment.
It is corrected now.

Driving Stepper Motors with the new TMC5160 by using TRINAMIC’s API on a Raspberry Pi

Preparation

Wiring

Raspberry Pi Code

Compiling and running the code

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Preparation

Wiring

Raspberry Pi Code

Compiling and running the code

Related Pages

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9 Comments

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