The part is M5Stack Unit RollerCAN. This repo contains my first approach to get familiar with the drive. No proper library. Blocking mode. No error handling. No multiple drive support (no structures/objects). No proper getters and setters. This is just to test the very basic functionalities of the drive. And my first impression with the drive is very positive. It is LEGO compatible! It has open-source firmware!
Tip
Is it a bug or a feature? A request for a parameter value is identical to the response if the value is zero. There is no way to tell the two frames apart. This is not the way we should organize messages on the CAN bus. Other nodes cannot use such a frame because its payload has no specific meaning. Setting RTR=1 causes the message to be ignored by the device - we cannot then use this mechanism to differentiate the messages. However, there is another bug (feature?) that creates a workaround to the first problem. According to the manual, the device is supposed to repeat the host two-byte ID in the response frame ID. Contrary to expectations, it repeats only the LSB. Thus, setting the MSB to some non-zero value makes the device to respond, e.g., with the frame ID 0x1100EFA8 to the request frame ID 0x11BEEFA. Voila!
Don't worry 🙂 Just log in to MyST and hit Alt-K to generate /Drivers/CMCIS/ and /Drivers/STM32G4xx_HAL_Driver/ based on the .ioc file. After a couple of seconds your project will be ready for building.
- Unit RollerCAN (M5Stack)
- Unit-RollerCAN CAN Control Protocol (M5Stack)
- M5Unit RollerCAN Internal Firmware (M5Stack)
- RollerCAN library in C for STM32/HAL (Waldek997)
Play with haptic feedback. Emulate a rotary knob with detent. Emulate a rotary knob with soft endstops. Demonstrate a volume knob that turns appropriately when the remote is used.
- Building a haptic input knob from scratch! (scottbez1)
- DIY haptic input knob: BLDC motor + round LCD (scottbez1)
- Motors Make The Best Knobs With SimpleFOC (Tyler August)
- A Cross-Platform Field Oriented Control (FOC) implementation for BLDC and Stepper motors based on the Arduino IDE and PlatformIO (SimpleFOCproject)
- Kurs STM32L4 - #16 - zdalne sterowanie IR, NEC (liczniki) (FORBOT)
- NEC Protocol Decoding with STM32 Part 1: Introduction (EmbeddedExpertIO)
- NEC Protocol Decoding with STM32 Part 2: Peripherals Setup (EmbeddedExpertIO)
- NEC Protocol Decoding with STM32 Part 3: Decoding algorithm (EmbeddedExpertIO)
Create your own home laboratory/workshop/garage! Get inspired by ControllersTech, DroneBot Workshop, Andreas Spiess, GreatScott!, bitluni's lab, ElectroBOOM, Phil's Lab, atomic14, That Project, Paul McWhorter, Max Imagination, Nikodem Bartnik, Stuff Made Here, Mario's Ideas, Aaed Musa, Haase Industries, and many other professional hobbyists sharing their awesome projects and tutorials! Shout-out/kudos to all of them! Promote README-driven learning 😎
Warning
Haptic feedback - do try this at home ❕
220+ challenges to start from: Control Engineering for Hobbyists at the Warsaw University of Technology.
Stay tuned!
0xBU