https://github.com/cjhdev/tiny_bldc
ATTINYx61 BLDC ESC
https://github.com/cjhdev/tiny_bldc
Last synced: 11 months ago
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ATTINYx61 BLDC ESC
- Host: GitHub
- URL: https://github.com/cjhdev/tiny_bldc
- Owner: cjhdev
- Created: 2012-09-16T06:17:47.000Z (over 13 years ago)
- Default Branch: master
- Last Pushed: 2016-06-14T23:01:44.000Z (almost 10 years ago)
- Last Synced: 2025-01-21T03:42:36.295Z (over 1 year ago)
- Language: C
- Homepage:
- Size: 1.48 MB
- Stars: 2
- Watchers: 2
- Forks: 1
- Open Issues: 0
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Metadata Files:
- Readme: README.md
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README
# dev0002: BLDC ESC
Firmware and bootloader for a low-cost BLDC ESC designed for radio controlled multi-rotor applications. The target MCU is the Atmel AVR attiny861.
## Features
* 10bit PWM at 8, 16 or 32KHz (lower or higher if application suits, though there are practical limits and tradeoffs)
* Synchronous rectification
* BEMF position detection
* Hardware based current limiting
* Temperature measurement
* Supply voltage measurement
* 100Kbit two-wire bus for control, configuration and data collection
* Bootloader
## Status of Project
* Bootloader bootloading on prototype hardware.
## Prototype Hardware
[Early prototype schematic](doc/reference_design.pdf)
## Documentation
[PR01 Two-Wire Bridging Protocol](doc/doc0002-0.02.pdf)
[PR02 Two-Wire Transfer Protocol](doc/doc0004-0.01.pdf)
## Communication
### Interface
100Kbit two-wire bus.
This interface is ideal for the following reasons:
* Multidrop
* Built-in addressing
* Bus is clocked by primary station
* No baud rate negotiation
* No crystal required on the secondary station
* Low cost
* No spare IO in this design
### Protocol
* PR03; Firmware upload, configuration, general communication.
* Flight protocol; broadcast and unicast modes for delivering throttle settings and retrieving status information.
Multiple protocols are able to exist at the same time through definition of separate address ranges.
## License
BSD.
Cameron Harper 2012
(cam@cjh.id.au)