mirror of https://github.com/kidoman/embd
update documentation a bit
This commit is contained in:
Thorsten von Eicken
parent
94cc116a81
commit
b013125381
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@ -5,11 +5,10 @@ branches:
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- go-rpi
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go:
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- 1.2.2
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- 1.3.3
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- 1.4
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- tip
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- 1.6
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- 1.7
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script:
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- go test -bench=. -v ./... | grep -v 'no test files' ; test ${PIPESTATUS[0]} -eq 0
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- cd samples; find . -name "*.go" -print0 | xargs -0 -n1 go build
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- cd embd; go build .
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45
README.md
45
README.md
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@ -7,10 +7,9 @@ It allows you to start your hardware hack on easily available hobby boards
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straight-forward access to the board's capabilities as well as a plethora of
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**sensors** (like accelerometers, gyroscopes, thermometers, etc.) and
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**controllers** (PWM generators, digital-to-analog convertors) for
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which we have written drivers. And when things get serious, you dont
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have to throw away the code. You carry forward the effort onto more
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custom designed boards where the HAL abstraction of EMBD will save you
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precious time.
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which it includes drivers. If you move to custom designed boards
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you have to throw away your code: you carry forward the effort
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where the HAL abstraction of EMBD will save you precious time.
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Development supported and sponsored by [**SoStronk**](https://www.sostronk.com) and
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[**ThoughtWorks**](http://www.thoughtworks.com/).
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@ -21,8 +20,9 @@ Also, you might be interested in: [Why Golang?](https://github.com/kidoman/embd/
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## Getting Started
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After installing Go* and setting up your [GOPATH](http://golang.org/doc/code.html#GOPATH),
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create your first .go file. We'll call it ```simpleblinker.go```.
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Install Go version 1.6 or later to make compiling for ARM easy.
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The set up your [GOPATH](http://golang.org/doc/code.html#GOPATH),
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and create your first .go file. We'll call it `simpleblinker.go`.
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```go
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package main
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@ -42,11 +42,11 @@ func main() {
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}
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```
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Then install the EMBD package (go1.6 or greater is required):
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Then install the EMBD package:
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$ go get github.com/kidoman/embd
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Build the binary*:
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Build the binary for linux/ARM:
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$ export GOOS=linux
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$ export GOARCH=arm
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@ -56,7 +56,7 @@ Copy the cross-compiled binary to your RaspberryPi*:
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$ scp simpleblinker pi@192.168.2.2:~
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Then run the program with ```sudo```*:
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Then on the rPi run the program with ```sudo```*:
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$ sudo ./simpleblinker
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@ -64,15 +64,14 @@ Then run the program with ```sudo```*:
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**<nowiki>*</nowiki> Notes**
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* We are instructing the ```go``` compiler to create a binary which will run on the RaspberryPi processor
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* Assuming your RaspberryPi has an IP address of ```192.168.2.2```. Substitute as necessary
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* ```sudo``` (root) permission is required as we are controlling the hardware by writing to special files
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* `sudo` (root) permission is required as we are controlling the hardware by writing to special files
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* This sample program is optimized for brevity and does not clean up after itself. Click here to
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see the [full version](https://github.com/kidoman/embd/blob/master/samples/fullblinker.go)
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## Getting Help
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Join the [mailing list](https://groups.google.com/forum/#!forum/go-embd)
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Join the [slack channel](https://gophers.slack.com/archives/embd)
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## Platforms Supported
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@ -80,10 +79,6 @@ Join the [mailing list](https://groups.google.com/forum/#!forum/go-embd)
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* [RaspberryPi 2](http://www.raspberrypi.org/)
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* [NextThing C.H.I.P](https://www.nextthing.co/pages/chip)
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* [BeagleBone Black](http://beagleboard.org/Products/BeagleBone%20Black)
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* [Intel Edison](http://www.intel.com/content/www/us/en/do-it-yourself/galileo-maker-quark-board.html) **coming soon**
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* [Radxa](http://radxa.com/) **coming soon**
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* [Cubietruck](http://www.cubietruck.com/) **coming soon**
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* Bring Your Own **coming soon**
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## The command line tool
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@ -91,8 +86,6 @@ Join the [mailing list](https://groups.google.com/forum/#!forum/go-embd)
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will install a command line utility ```embd``` which will allow you to quickly get started with prototyping. The binary should be available in your ```$GOPATH/bin```. However, to be able to run this on a ARM based device, you will need to build it with ```GOOS=linux``` and ```GOARCH=arm``` environment variables set.
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But, since I am feeling so generous, a prebuilt/tested version is available for direct download and deployment [here](https://dl.dropboxusercontent.com/u/6727135/Binaries/embd/linux-arm/embd).
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For example, if you run ```embd detect``` on a **BeagleBone Black**:
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root@beaglebone:~# embd detect
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@ -225,17 +218,11 @@ platforms.
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## Sensors Supported
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* **TMP006** Thermopile sensor [Documentation](http://godoc.org/github.com/kidoman/embd/sensor/tmp006), [Datasheet](http://www.adafruit.com/datasheets/tmp006.pdf), [Userguide](http://www.adafruit.com/datasheets/tmp006ug.pdf)
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* **BMP085** Barometric pressure sensor [Documentation](http://godoc.org/github.com/kidoman/embd/sensor/bmp085), [Datasheet](https://www.sparkfun.com/datasheets/Components/General/BST-BMP085-DS000-05.pdf)
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* **BMP180** Barometric pressure sensor [Documentation](http://godoc.org/github.com/kidoman/embd/sensor/bmp180), [Datasheet](http://www.adafruit.com/datasheets/BST-BMP180-DS000-09.pdf)
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* **LSM303** Accelerometer and magnetometer [Documentation](http://godoc.org/github.com/kidoman/embd/sensor/lsm303), [Datasheet](https://www.sparkfun.com/datasheets/Sensors/Magneto/LSM303%20Datasheet.pdf)
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* **L3GD20** Gyroscope [Documentation](http://godoc.org/github.com/kidoman/embd/sensor/l3gd20), [Datasheet](http://www.adafruit.com/datasheets/L3GD20.pdf)
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* **US020** Ultrasonic proximity sensor [Documentation](http://godoc.org/github.com/kidoman/embd/sensor/us020), [Product Page](http://www.digibay.in/sensor/object-detection-and-proximity?product_id=239)
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* **BH1750FVI** Luminosity sensor [Documentation](http://godoc.org/github.com/kidoman/embd/sensor/bh1750fvi), [Datasheet](http://www.elechouse.com/elechouse/images/product/Digital%20light%20Sensor/bh1750fvi-e.pdf)
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## Interfaces
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@ -245,9 +232,7 @@ platforms.
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## Controllers
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* **PCA9685** 16-channel, 12-bit PWM Controller with I2C protocol [Documentation](http://godoc.org/github.com/kidoman/embd/controller/pca9685), [Datasheet](http://www.adafruit.com/datasheets/PCA9685.pdf), [Product Page](http://www.adafruit.com/products/815)
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* **MCP4725** 12-bit DAC [Documentation](http://godoc.org/github.com/kidoman/embd/controller/mcp4725), [Datasheet](http://www.adafruit.com/datasheets/mcp4725.pdf), [Product Page](http://www.adafruit.com/products/935)
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* **ServoBlaster** RPi PWM/PCM based PWM controller [Documentation](http://godoc.org/github.com/kidoman/embd/controller/servoblaster), [Product Page](https://github.com/richardghirst/PiBits/tree/master/ServoBlaster)
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## Convertors
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@ -256,9 +241,11 @@ platforms.
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## Contributing
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We look forward to your pull requests, but contributions which abide by the [guidelines](https://github.com/kidoman/embd/blob/master/CONTRIBUTING.md) will get a free beer!
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File an [issue](https://github.com/kidoman/embd/issues), open a [pull request](https://github.com/kidoman/embd/pulls). We are waiting.
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[Pull requests](https://github.com/kidoman/embd/pulls) that follow the
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[guidelines](https://github.com/kidoman/embd/blob/master/CONTRIBUTING.md) are very appreciated.
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If you find a problem but are not up to coding a fix please file an
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[issue](https://github.com/kidoman/embd/issues).
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Thank you!
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## About
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140
doc.go
140
doc.go
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@ -1,88 +1,88 @@
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/*
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Package embd provides a hardware abstraction layer for doing embedded programming
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on supported platforms like the Raspberry Pi and BeagleBone Black. Most of the examples below
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will work without change (i.e. the same binary) on all supported platforms. How cool is that?
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/* doc
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Package embd provides a hardware abstraction layer for doing embedded programming
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on supported platforms like the Raspberry Pi and BeagleBone Black. Most of the examples below
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will work without change (i.e. the same binary) on all supported platforms. How cool is that?
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Although samples are all present in the samples folder, we will show a few choice examples here.
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Although samples are all present in the samples folder, we will show a few choice examples here.
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Use the LED driver to toggle LEDs on the BBB:
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Use the LED driver to toggle LEDs on the BBB:
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import "github.com/kidoman/embd"
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...
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embd.InitLED()
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defer embd.CloseLED()
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...
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led, err := embd.NewLED("USR3")
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...
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led.Toggle()
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import "github.com/kidoman/embd"
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...
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embd.InitLED()
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defer embd.CloseLED()
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...
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led, err := embd.NewLED("USR3")
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...
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led.Toggle()
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Even shorter while prototyping:
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Even shorter while prototyping:
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import "github.com/kidoman/embd"
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...
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embd.InitLED()
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defer embd.CloseLED()
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...
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embd.ToggleLED(3)
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import "github.com/kidoman/embd"
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...
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embd.InitLED()
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defer embd.CloseLED()
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...
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embd.ToggleLED(3)
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BBB + PWM:
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BBB + PWM:
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import "github.com/kidoman/embd"
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...
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embd.InitGPIO()
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defer embd.CloseGPIO()
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...
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pwm, _ := embd.NewPWMPin("P9_14")
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defer pwm.Close()
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...
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pwm.SetDuty(1000)
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import "github.com/kidoman/embd"
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...
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embd.InitGPIO()
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defer embd.CloseGPIO()
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...
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pwm, _ := embd.NewPWMPin("P9_14")
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defer pwm.Close()
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...
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pwm.SetDuty(1000)
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Control GPIO pins on the RaspberryPi / BeagleBone Black:
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Control GPIO pins on the RaspberryPi / BeagleBone Black:
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import "github.com/kidoman/embd"
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...
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embd.InitGPIO()
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defer embd.CloseGPIO()
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...
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embd.SetDirection(10, embd.Out)
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embd.DigitalWrite(10, embd.High)
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import "github.com/kidoman/embd"
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...
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embd.InitGPIO()
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defer embd.CloseGPIO()
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...
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embd.SetDirection(10, embd.Out)
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embd.DigitalWrite(10, embd.High)
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Could also do:
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Could also do:
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import "github.com/kidoman/embd"
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...
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embd.InitGPIO()
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defer embd.CloseGPIO()
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...
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pin, err := embd.NewDigitalPin(10)
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...
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pin.SetDirection(embd.Out)
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pin.Write(embd.High)
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import "github.com/kidoman/embd"
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...
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embd.InitGPIO()
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defer embd.CloseGPIO()
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...
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pin, err := embd.NewDigitalPin(10)
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...
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pin.SetDirection(embd.Out)
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pin.Write(embd.High)
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Or read data from the Bosch BMP085 barometric sensor:
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Or read data from the Bosch BMP085 barometric sensor:
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import "github.com/kidoman/embd"
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import "github.com/kidoman/embd/sensor/bmp085"
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...
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bus := embd.NewI2CBus(1)
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...
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baro := bmp085.New(bus)
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...
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temp, err := baro.Temperature()
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altitude, err := baro.Altitude()
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import "github.com/kidoman/embd"
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import "github.com/kidoman/embd/sensor/bmp085"
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...
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bus := embd.NewI2CBus(1)
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...
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baro := bmp085.New(bus)
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...
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temp, err := baro.Temperature()
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altitude, err := baro.Altitude()
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Even find out the heading from the LSM303 magnetometer:
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Even find out the heading from the LSM303 magnetometer:
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import "github.com/kidoman/embd"
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import "github.com/kidoman/embd/sensor/lsm303"
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...
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bus := embd.NewI2CBus(1)
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...
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mag := lsm303.New(bus)
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...
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heading, err := mag.Heading()
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import "github.com/kidoman/embd"
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import "github.com/kidoman/embd/sensor/lsm303"
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...
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bus := embd.NewI2CBus(1)
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...
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mag := lsm303.New(bus)
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...
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heading, err := mag.Heading()
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The above two examples depend on I2C and therefore will work without change on almost all
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platforms.
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The above two examples depend on I2C and therefore will work without change on almost all
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platforms.
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*/
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package embd
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