Legacy stepper motor analyzer - A DYI minimalist hardware stepper motor analyzer with graphical touch screen.

Overview

Simple Stepper Motor Analyzer

NOTE: This is the legacy STM32 based design which was replaced by the single board, Raspberry Pi Pico design at https://github.com/zapta/simple_stepper_motor_analyzer.

 

https://github.com/zapta/legacy_stepper_motor_analyzer

 

 

Demonstration

Michael from the Teaching Tech youtube channel made a great video explaining how stepper motors work and used the Simple Stepper Motor Analyzer for some of the demonstrations.

 

Highlights

  • Low cost and minimalist DYI hardware design.
  • Standalone. Doesn't require a computer to operate.
  • Analyzes the stepper motor signals in the actual system (e.g. a 3D printer).
  • Galvanically isolated current sensors. Does not interfere with the operating equipment, even when its turned off.
  • Easy to connect using a pair 4 wire pass through connectors.
  • Intuitive user interface with color display and a capacitive touch.
  • Microstepping resolution of 1% of a full step.
  • Provides momentary readings, signal patterns, and statistical measurements.
  • Hardware and software are open sourced with a generous license.
  • Based on free tools (Kicad, platformio, LVGL, STM32Duino).
  • Can be easily customized (new featured, cost reduction, data link to a computer, etc).
  • Powered 5VDC, 200ma via a USB-C connector.

Overview

Diagnosing the operation of stepper motor in 3D printers and CNC machines used to require stepper motor analyzers that costs thousands of dollar. Not anymore! The Simple Stepper Analyzer ('Analyzer' in short) brings these capabilities to every maker for a tiny fraction of the price and with a minimalist DIY electronic design that leaves the heavy lifting to the firmware.

The Analyzer is self contained, has two 4-wires pass-through connectors connecting the stepper motor, is powered from a common 5V charger with a micro USB cable, provides a simple to use graphical user interface with a 3.5" color touch screen, and provides a plethora of stepper motor measurements.

The Analyzer is provided to the community as a public domain reference design that can be built and used as is, or be customized with additional features or for a lower cost as desired. The hardware and firmware come with a liberal open source license (CC0) that allows commercial usages and doesn't require code source code sharing.


Disclaimer

THE DESIGN IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE DESIGN OR THE USE OR OTHER DEALINGS IN THE DESIGN.


Alternative construction option (enclosed case)

NOTE: This pages outlines the open base construction options which is easier and straight forward. For a more involved and potentially more satisfying construction option, which is also featured in the Teaching Tech youtube video, see https://github.com/zapta/legacy_stepper_motor_analyzer/blob/master/case_option.md


How does it work?

The principle of operation is very simple, and so is the hardware design. The stepper motor is connected via 4 wire pass-though connectors that allow the Analyzer to monitor the current through the stepper's coils. The Analyzer's user low impedance current sensors that are galvanically isolated such does not interfere with the operation of the 3D printer or other equipment it monitors. The Analyzer measures the coils currents 100k times a second and uses firmware that analyzes the data, extracts the desired measurements, and present them on the screen. For example, this is how an analysis of the distribution of distance by speed distribution looks like:


Operation is simple and intuitive

  1. Turn off power to the equipment (e.g. 3D printer).
  2. Disconnect the 4 wires of the stepper motor and connect them through the Analyzer two pass through connectors.
  3. Power the analyzer using a 5V charger and a micro USB cable.
  4. Turn on the equipment and get the stepper going.
  5. Use the Analyzer's screen to view the measurements you want.

NOTE: The two pass-through connectors of the Analyzer are symmetric and each can act as an input or output.

CAUTION: Always connect and disconnect stepper motors when their controller is not energized, to reduce the risk of damage to the controller due to high voltage spikes. The analyser itself is not subject to that risk since its uses galvanically isolated current sensors.

NOTE: The only requirement for proper wiring is that the two wires of one coil should go through pins pair 1,2 and the two wires of the other coil should go through pin pair 3,4. The Analyzer doesn't care about the +/- polarity of the wires in each pair, nor does it care which of the two pass-through connectors is on the controller side and which one is on the stepper side.

TRIVIA:: The pin out and the connector type of the Analyzer follows the Duet3D conventions, except that is uses right angle connector to save space.


The Home Page

The Home page is first page shown when the Analyzer is powered on. It provides summary information as well as access to the Settings page.

 

Page Data

Field Description
COIL 1 Momentary coil 1 current in Amps.
COIL 2 Momentary coil 2 current in Amps.
ERRORS The number of phase errors detected so far. Phase errors happens when the current patterns are so distorted that a forward/backward movement cannot be determined.
POWER Indicates if the stepper motor is currently energized. This is determined by the sum of currents in they two coils.
IDLES The number of times that stepper motor change status from energized to non energized.
STEPS The distance the stepper moved so far. Each full step forward increments this value by one and each full step backward decrements it by one. When the stepper motor is energized, the display also shows fractional steps in resolution of 1/100th of a full step.

HINT: The fractional step value cannot be reset because it is derived from the momentary currents in the two coils. Only the stepper motor driver can reset the fraction by positioning the stepper motor on an exact full step.

HINT: To swap forward/backward directions of the Analyzer use the Settings page. This does not affect the stepper motor itself.

 

Page Actions

Action Description
Clear all data.
Open the Settings page.

 


The Settings Page

This is a special page that is accessible from the Home page and allows to calibrate the Analyzer. The settings are stored in a non volatile memory and are preserved when the Analyzer is turned off.

 

Page Data

Data Description
COIL 1 The momentary current of stepper coil 1 in Amp units. Should be zero, or very close to zero, when the stepper motor is disconnected.
COIL 2 The momentary current of stepper coil 2 in Amp units. Should be zero, or very close to zero, when the stepper motor is disconnected.

 

Page Actions

Action Description
SET ZERO Used to calibrate the zero reading of the current sensors. To do so, Disconnect the stepper motor and press this button.
REVERSE STEPS DIRECTION Changes the forward/backward step directions of the Analyzer. Does not affect the stepper motor itself. Having the correct direction is important for measurements such as the Retraction analysis.
Press exist the Settings page.

 


The Speed Dial Page

This page measure the stepper speed in units of full steps per second.

 

Page Data

Data Description
Speed Dial The speed dial shows the momentary stepper speed in full steps per second units. Forward speed is on the right side and backward speed is on the left.
Speed Value This field shows the speed in a numeric form. IT is updated less frequently than the dial to allow easy reading.

  HINT: The Settings page allows to swap the forward/backward directions.

 

Page Actions

Action Description
Clears all data.
Tap the dial Toggles the dial's speed range.

 


The Distance Graph Page

This page shows scrolling graph with the total number of full steps vs. time.

 

Page Data

Data Description
Distance Graph This graph shows how the distance, in units of full steps, changes over time.
Distance value The numeric value of the distance in full steps. This fields is identical to the STEPS field in the Home page.

 

Page Actions

Action Description
Clears all data.
Tap the graph Toggles the range of the vertical axis.

 


The Retraction Graph Page

This page is useful to analyze the retraction in of 3D printer extruder.

  TRIVIA: The graph above was taken while testing a direct extruder printer with Thing #909901.  

Page Data

Data Description
Retraction Graph This graphs tracks the retraction of 3D extruder full step units. Retraction is defined as the filament length that was inside the extruder and is now retracted outside of the extruder.
Retraction value This field shows the current retraction level in a numeric form.

 

Page Actions

Action Description
Clear all data.
Tap the graph Changes the range of the vertical axis.

 


The Time by Speed Page

This page shows an histogram with the distributing of time by stepper speed. That is how much time was spent in each speed range. The values are normalized such that the longest bar is always at 100%.

 

Page Data

Data Description
Time Histogram The horizontal axis indicates speed in full steps per second units. The height of each bar indicate the time of all steps in that speed range, with the length of the longest bar normalized to 100%.

 

Page Actions

Action Description
Clear all data.

 


The Distance by Speed Page

This page shows an histogram with the the distribution of distance by stepper speed.

 

Page Data

Data Description
Distance Histogram The horizontal axis indicates speed in full steps per second units. The height of each bar indicate the distance or number of steps in that speed range, with the length of the longest bar normalized to 100%.

 

Page Actions

Action Description
Clear all data.

 


The Current by Speed Page

This page measures the ability of the stepper motor's controller to maintain peak current at high speeds.

The screenshot below shows a healthy system where the peak current is virtually flat across the speed range.

The screenshot below shows a system that is not capable to maintain peak current and starves the stepper motor at high speeds, resulting in poor torque and possible skipped steps.

 

Page Data

Data Description
Peak Current Histogram The horizontal axis indicates speed in full steps per second units. The height of each bar indicates the average peak current in Amps of steps that speed range.

 

Page Actions

Action Description
Clear all data.

 


Coil Current Patterns Page

This page shows the current patterns in the two stepper coils.

The screenshot below shows a healthy system where the signals are nice and clean and reaches the target peak current.

 

The screenshot below is from a poor system where high speed results in distorted and insufficient current, resulting in loss of torque and a potential for skipped steps.

 

GENERAL INFORMATION: Each cycle of the stepper current pattern represent 4 full steps. The centers of those steps are at on the four vertical dotted lines where the currents of the two coils are identical, in the same or in opposite polarities. The transitions between the steps are on the 4 vertical solid lines where one of the coils is at zero current. This cycle of 4 full steps is sometimes referred to as a single 'electric rotation'. The analyzer computes the exact phase on this cycle using the standard trigonometric function atan2(current1, current2) which can also be calculated manually from the current readings in the Home page.

 

Page Data

Data Description
Current graph The horizontal axis indicates time in milliseconds. The vertical axis indicate coil current level in Amps. The two graphs show the current patterns of the respective stepper coils.

NOTE: The graph is updated only when sufficient stepper motor movement is detected.

 

Page Actions

Action Description
Clear all data.
When running, pauses the display updates.
When paused, resume the display updates.
Tap the graph This toggles the range of the horizontal axis.

 


Coil Current Phase Page

This page draws the current patterns of the two coils as a Lissajous curve which allows to examine visually distortions such as non sinusoidal current, phase distortion, and reduced amplitude.

In an ideal system, the graph is a perfect smooth circle, that doesn't change its size when the stepper's speed changes. Patterns that significantly diverge from that indicates a sub optimal configuration and operation.

Following picture shows a pattern from a well functioning system. The graph is round, reasonable smooth, and has sufficient size which indicates good current drive.

The horizontal axis indicates the coil 1 current and the vertical axis indicates coil 2 current. In this example, both span nicely between -2A to +2A.

 

The screenshot below is from a poor system where high speed results in distorted and insufficient current, resulting in loss of torque and a potential for skipped steps. The pattern is far from a clean circle and the shape has reduced size.

 

The screenshot below shows a sub optimal operation where a a speed increase of the stepper results in small (less current and torque) and even more distorted curve.

 

The screenshot below shows a well functioning system. The smaller size of the circle compare to the example above indicates that it operates on lower current.

 

The screenshot below show an operation of a stepper in full steps mode. The dimension of the pattern indicate good current feed, and the square shape is the best a full step driver can deliver.

 

The screenshot below show an operation of a stepper in half steps mode. The dimension of the pattern indicate good current feed, and the shape is somewhere between the square shape of full step mode and the round shape of micro stepping interpolation mode.

 

Page Data

Data Description
Lissajous curve A Lissajous curve drawn from the current pattern of coil 1 (x) and coil2(y).
Capture speed Shows the signal capture time. Fast mode works better with fast moving steppers and slow mode works with slow moving steppers. Tap the graph to toggle.

NOTES

  • The graph is updated only when sufficient stepper motor movement is detected.
  • To view the current pattern that resulted in the current phase pattern, use the navigation button to switch the current patters page, and vice versa.

 

Page Actions

Action Description
Clear all data.
When running, pauses the display updates.
When paused, resume the display updates.
Tap the graph This toggles the capture time between fast and slow speeds.

 


Reference Design Specification

Item Specification
Power consumption 5V, 175ma.
Power connector micro USB
MCU 32bit ARM STM32F401CE @ 84Mhz.
Flashing USB/DFU or SWD/Stlink V2.
Data link USB/Serial link available but not used.
Current measurement +/-2.5A per coil. +/-5A sensors available.
Dimensions 97 x 66 mm
TFT Resolution 480 x 320, Color. Landscape mode.
Touch screen Capacitive
Sensor isolation See ACS70331 data sheet
Sampling rate 100Khz per channel.
Sampling resolution 12bits
Current accuracy estimated at +/- 1%
Max speed Software dependent. Currently 2K full steps/sec.
Step resolution 1/100th of a full step.
Partial steps measurement Software dependent. Not implemented.
Settings storage On board EEPROM chip.
GUI framework LVGL library. R3G3B2 color depth.
Programming language C++
Programming IDE Platform.io. Arduino/STM32.
Cad package Kicad.

 


I want to build me one

The electronic schematic, PCB layout, gerber files, and the firmware source files and released binary are all available on this github repository.

Schematic

BOM

ERRATA: The current PCB version leaves the RD input on the TFT (pin 26) floating which can interfere with the operation of the display. One workaround is to patch the board with a resistor to pull the input to +3.3v (but not to +5V!!!). See the errata in the latest schematic for more details.

 

Instructions: Build the PCB, use DFU or SWD protocols to program the released binary into the Blackpill, plugin the TFT screen, power and use. See instructions below on how to flash the firmware release you can find on this github repository.

NOTE: These instructions are for the simpler version which uses an open frame base. For ordering parts and building the enclosed version see https://github.com/zapta/legacy_stepper_motor_analyzer/blob/master/case_option.md .

 

Flashing a new firmware

Flashing the Analyzer with firmware can be done in a few ways. For software developers we recommend using StLink V2 and SWD which are well supported by the platformio IDE and enable debugging ans single stepping. A simpler approach that is recommended for end users is to use the builtin DFU protocol of the Analyzer's STM32 processor such as the one we use here. Adafruit has a good description of the process. The only difference that to enable the DFU bootloader mode connect the analyzer to the computer while its BOOT0 on button on the back is pressed.

ONLINE LOADER: We also had good results with Google Chrome browser and this online loader https://devanlai.github.io/webdfu/dfu-util/ . The Analyzer should appear as STM32 BOOTLOADER and should be programmed with the configuration Internal Flash 0x08000000.

How to modify the firmware?

The source code of the Analyzer is available on this github repository. It is a STM32 C++ Platformio project that uses the Arduino framework. The user interface is based on the LVGL library and the project includes its own port to support TFT/Touch used. Knowledge of C++ and Platformio is required and is outside the scope of this document.

Mechanical

We provide here a 3D model of a simple open frame carrier. This design does not requires attaching the analyzer and the TFT board with screws or spacers and guarantees proper separation on the loose end. If you have an interesting design which you would like to share, please post in a model sharing site such as cults3d, thingiverse or grabcad and we will link it here.

This open frame base does not require any spacers between the two boards and was designed to prevent them from unintentionally touching each other.

Ideas for improvements

The Analyzer is provided as a fully functional reference design and changes and the developers encourage improvement/modifications of the hardware and/or firmware are encouraged. This can include new features, new measurements and pages, extending the design to support 2 or 3 steppers at once to track the x/y/z of a 3D printer, reducing the hardware cost using less expensive screen TFT, or even eliminating the screen altogether and using the Analyzer as a dongle tethered to a computer via the existing USB/Serial link.

 


FAQ

Q: Why not a SPI based TFT?

A: We could not achieve fast enough display refresh rate with SPI so switched to 16 bit parallel data transfers.

Q: Can a cheaper TFT/touch be used?

A: Yes, but it may require firmware changes.

Q: Can the TFT screen be eliminated?

A: Yes. The Analyzer has a USB/Serial output can a small Analyzer dongle can communicate with a computer program. This will require firmware changes.

Q: Can I connect the Analyzer to the TFT using a FFC cable?

A: Yes. The PCB was designed for both 0.1" header and 40 pins 1.0mm FFC cable connections. You will need a short (e.g. 60mm or less) type B ('reversed') FFC cable. Cables longer than let's say 100mm may introduce noises the will interfere with the operation of the display.

Q: Can you add feature X or customization Y?

A: Most likely not. The reference design is provided for the community to change and mix.

Q: I want to commercialize or crowd source it, can you help me?

A: Most likely not. The reference design is open source and you will need to find others to help you.

Q: Where do I file a bug?

A: Use the github repository.

Q: Is it ok to connect/disconnect power to the Analyzer while my 3D printer prints?

A: Of course. The Analyzer is isolated from the stepper wires and should not interfere with the operation of the printer.

Q: The Analyzer uses LVGL lib, what is the license of that library?

A: At the time of writing this, the LVGL license is available here https://github.com/lvgl/lvgl/blob/master/LICENCE.txt. The Analyzer's developers are not affiliated with LVGL.

Q: Is the LVGL library included in the Analyzer's repository?

A: It's not needed. LVGL is supported by platform.io so the Analyzer's project is set for platform.io to fetch LVGL automatically.

Q: Can I use a STM32F401CE MCU with a 8Mhz crystal.

A: The provided firmware assumes a 25Mhz crystal. For a 8Mhz crystal you will need to change the firmware.

Q: I can't find a STM32F401CE/25Mhz blackpill but I can find an STM32F411CE/25Mhz, will this work?

A: Most like it will work with the provided firmware as is (and with no performance benefits), but we do not guarantee it. We may switch the official reference design to the STMF411CE/25Mhz if the STM32F401CE/25Mhz, which is less expensive, will not be available.

Q: Can I use a blackpill with different pinout than WeAct ?

A: No, unless if you are willing to change the PCB.

Issues
  • Need your help

    Need your help

    Dear blogger: I'm a college student from China. I made a machine by myself according to your steps. After the assembly is completed and the firmware is burned, it can't be displayed normally. It's just a white screen. I bought the left and right components according to the BOM provided by you. Can you help me solve this problem? If you can, I hope you can contact me. Thank you! Mailbox: [email protected]

    opened by Stranger-tx 13
  • arduino camel case fix

    arduino camel case fix

    Need uppercase Arduino.h so compiles on Linux.

    Have tested build on Debian & Win10, but my hardware still in the mail, so have not uploaded & tested.

    opened by spanner888 1
  • QFN-12 to SOIC8 replace

    QFN-12 to SOIC8 replace

    Dear author, in your project "Legacy_stepper_motor_analyser" you used current sensors ACS70331EESATR-2P5B3 (x2 QFN-12 chip ). Can you make light redesign of the board and add place for SOIC-8 version of current sensors (ACS70331EOLCTR-2P5B3), or fully change places ( x2 QFN-12 to x2 SOIC-8)? This is problem for me to find sensor in QFN-12 chip with adequate price :( The SOIC-8 version is widely presented in available stores. I'm sorry, but I haven't enough time to deal with Kicad now :(. Alas, migrate to Raspbery PI is not acceptable variant too. Best regards

    opened by vakuliniv 5
  • Display performance requirements

    Display performance requirements

    What kind of performance do you need from the display? Since you went with a parallel interface, I assume that you need fast updates. There are lots of inexpensive displays that use SPI - too slow for your needs?

    By the way, I am posting in Issues though these aren't really "issues". If you turned on Discussions - I would put them there. I think your project has a lot of potential for derivative projects and variant hardware. Perhaps Discussions would be a better place to talk about that?

    opened by phil-barrett 2
  • Alternative Sensor?

    Alternative Sensor?

    Hi, cool project here. I see a number of ways this could be taken. My first question is about the sensor. It is rated for up to 2.5A. My experience is that to be really safe I need to derate. Have you played with any bidirectional sensors that work at higher currents? I see Allegro has quite a few.

    Have you looked at the ACS712? It claims to handle up to 20A. Does that make your readings too coarse? I suppose I should dig through the code...

    opened by phil-barrett 1
  • Would a voltage reading be possible?

    Would a voltage reading be possible?

    It would be cool to see what realtime voltages are driven into the motors. (Better power estimations?)

    Seems like the galvanic isolation would prevent this, though :(

    opened by pfn 3
Owner
Zapta
Zapta
Design and firmware for a stepper motor retrofit to the often-failed AC synchronous flip clock motors

StepperFlipClock Design and firmware for a stepper motor retrofit to the often-failed AC synchronous flip clock motors. Flip clocks, perhaps most icon

Dan Ellis 2 Jun 11, 2022
A simple tool using PC mouse via USART to control MCU and LCD/OLED (with LVGL library), if your screen cannot be controlled by touch.

LVGL_USB_Mouse A simple tool using PC mouse via USART to control MCU and LCD/OLED (with LVGL library), if your screen cannot be controlled by touch. 如

k_ying 5 May 5, 2022
TinyTouchLight - Dimmable USB Night Light with Capacitive Touch Control

TinyTouchLight - Dimmable USB Night Light with Capacitive Touch Control

Stefan Wagner 9 Jun 13, 2022
Arduino Capacitive Touch library

Arduino Capacitive Touch Library Basic Arduino Capacitive Touch library. This is useful if, for example, you want to use apples as input buttons. Or m

Tauno Erik 1 Nov 17, 2021
Cross-platform C++ input library supporting gamepads, keyboard, mouse, touch

This project is archived. It's neither maintained nor developed anymore. Gainput Gainput is the awesome C++ input library for your game: handles your

Johannes Kuhlmann 745 Jun 24, 2022
Yet another matrix client. Click packaging for locally running on Ubuntu Touch

Cinny Click Packaging Cinny is a Matrix client focusing primarily on simple, elegant and secure interface. License Cinny source package licensed under

Nitan Alexandru Marcel 5 Jun 24, 2022
A large mechanical 7-segment clock using cheap stepper motors.

mechanical-7-segment-clock A large mechanical 7-segment clock using cheap stepper motors. Each digit requires its own controller board. The seconds di

null 42 Mar 17, 2022
Code for Stepper Motors and Robot Kinematics YouTube course

Code for YouTube course: Stepper Motors and Robot Kinematics: Theory and Practice on STM32 This repo contains the code for my YouTube course Stepper M

null 4 Jan 6, 2022
Dune Legacy port for PS Vita

Dune Legacy port for PS Vita Install Download and install dunelegacy.vpk. Extract content of dunelegacy_data.zip into ux0:data/. https://github.com/No

Taras 8 May 1, 2022
A rewrite of the old legacy software "depends.exe" in C# for Windows devs to troubleshoot dll load dependencies issues.

Dependencies - An open-source modern Dependency Walker Download here (If you're running an AV, use this download instead) NB : due to limitations on /

null 5k Jun 27, 2022
legacy Botnets source code Forked from github.com/malwares

Legacy-Botnets-Source-Code-Collection github.com/malwares None of these were made by me and I take no resonsibility for anything done with the code. T

Mohammed amine guesmi 13 Jun 4, 2022
A utility to compile IW engine legacy UI scripts.

MENU Tool A utility to compile IW engine legacy UI scripts. Supported Games IW5 (Call of Duty: Modern Warfare 3) Usage ./menu-tool.exe <path> Disclaim

Xenxo Espasandín 2 Jan 31, 2022
This is for interfacing rasberry-pi's (2 cards) with an arduino for sending raw data to form the close loop system to avoid motor heating by acting on a given temperature.

This is for interfacing rasberry-pi's (2 cards) with an arduino for sending raw data to form the close loop system to avoid motor heating by acting on a given temperature. Interface is explained through a master slave approach and client server approach. another camera is used with OPEN-CV platform to interface and collect data aswell.

Younes HAMZA 2 Oct 25, 2021
Arduino library for controlling the movements of a 2wd robotic car using a H-bridge motor driver L298P

RoboticCar Arduino library for controlling the movements of a 2wd robotic car using a H-bridge motor driver L298P Install the library Download this re

José Augusto Cintra 1 Nov 21, 2021
4 channel servo controller code for Arduino Mega 2560 for AASD-15A and similar motor driver

eh-msc-4dof 4 channel servo controller code for Arduino Mega 2560 for AASD-15A and similar motor driver Arduino sketch for generating pulses needed to

null 4 Jan 8, 2022
isabel - Simple, minimalist note manager.

isabel isabel - Simple, minimalist note manager. Usage Type name and body of note and press Ctrl+s for save note. Press Tab to open notes list. Press

null 1 Oct 2, 2021
Second life for famous JPEGView - fast and tiny viewer/editor for JPEG, BMP, PNG, WEBP, TGA, GIF and TIFF images with a minimalist GUI and base image processing.

JPEGView-Image-Viewer-and-Editor Updated Dec 07 2021. Version 1.1.1.0 has been released. Download link1, link2 added. Second life for famous JPEGView

Ann Hatt 20 Jun 9, 2022
Gfx - A minimalist and easy to use graphics API.

gfx gfx is a minimalist and easy to use graphics API built on top of Direct3D12/HLSL intended for rapid prototyping. It supports: Full shader reflecti

Guillaume Boissé 236 Jun 24, 2022
Minimalist protocol buffer decoder and encoder in C++

protozero Minimalistic protocol buffer decoder and encoder in C++. Designed for high performance. Suitable for writing zero copy parsers and encoders

Mapbox 217 Jun 28, 2022