Announcing v2.2.0
BeagleBone and more!
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@periphio
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Version 2.2.0 is released!
This is a polish and features update. I know a v3 was promised but we decided to punt on breaking changes since there was too much great stuff to bake into the v2 branch.
Historical note: periphextra and hostextra.Init() is deprecated.
The new release contains 79
changes by 7
contributors for a diff stat of 235 files changed, 9279 insertions(+), 3103 deletions(-).
Hardware support
- beagle: Full header support for the BeagleBone Black and Green. Common headers are in bone.
- rpi: Correctly handles the RPi3 B+ model.
- bcm283x: Added new functions to read or modifying 32 GPIOs all at once; PinsRead0To31(), PinsClear0To31() and PinsSet0To31().
- bcm283x: Improved DMA support.
- Warning: Still experimental.
- New experimental device drivers were contributed: cap1188, hd44780u, mfrc522.
Software
- gpioreg: The GPIO registry had
intensive structural changes in preparation for support of dynamic GPIOs, e.g.
over USB. It completely discarded the principle of pin numbers, and only
refers to pin names. Number-based aliases are still kept, but they need to be
the decimal textural string representation. Added Unregister.
- Warning: The primary side effect is that alias evaluation via gpio.RealPin may have to be done in places where it ‘happened to work’ previously.
- conn: Removed a ton of indirect dependencies on reflect. This is to make conn essentially ‘reflect-free’, which would enable more embedded uses cases.
- Added
String()to all objects, in preparation to requiring it in conn.Resource. - Refactored all examples to be copy-pastable.
- periph: Added undocumented support for a new
method
After(), which enables significantly more parallelism in driver loading. This function will be added to periph.Driver in v3. - cmd: Added support for a new build tag
periphextra. This makes the executables use hostextra.Init() instead of host.Init().- Warning: If you use a pattern like
go build ./cmd/periph-info/main.go, this will not work anymore as each executable is now multiple source files. The correct way isgo install periph.io/x/periph/cmd/periph-info
- Warning: If you use a pattern like
- gpiotest: Added PinPWM and LogPinIO.
- onewire-list to display registered 1-wire buses.
Special thanks
I want to give a special thank to all the contributors that made this release possible!
- @bodokaiser for beagle bone support and gpiotest improvement.
- @cassiobotaro for cleanups.
- @jdevelop for hd44780 and mfrc522 device drivers.
- @libesz for onewire-list command.
- @mattetti for cap1188 device driver.
- @simokawa for bcm283x DMA improvements.
I (@maruel) did the rest, including the release process and the gohci test lab.
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