79 lines
2.1 KiB
Go
79 lines
2.1 KiB
Go
// +build example
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//
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// Do not build by default.
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package main
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import (
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"fmt"
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"time"
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"gobot.io/x/gobot"
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"gobot.io/x/gobot/drivers/gpio"
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"gobot.io/x/gobot/platforms/adaptors"
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"gobot.io/x/gobot/platforms/raspi"
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)
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// Wiring
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// PWR Raspi: 1 (+3.3V, VCC), 2(+5V), 6, 9, 14, 20 (GND)
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// GPIO Raspi: header pin 21 (GPIO9) is input, pin 24 (GPIO8) is normal output, pin 26 (GPIO7) is inverted output
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// Button: the input pin is wired with a button to GND, the internal pull up resistor is used
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// LED's: the output pins are wired to the cathode of a LED, the anode is wired with a resistor (70-130Ohm for 20mA) to VCC
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// Expected behavior: always one LED is on, the other in opposite state, if button is pressed for >2 seconds the state changes
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func main() {
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const (
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inPinNum = "21"
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outPinNum = "24"
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outPinInvertedNum = "26"
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)
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// note: WithGpiosOpenDrain() is optional, if using WithGpiosOpenSource() the LED's will not light up
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board := raspi.NewAdaptor(adaptors.WithGpiosActiveLow(outPinInvertedNum),
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adaptors.WithGpiosOpenDrain(outPinNum, outPinInvertedNum),
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adaptors.WithGpiosPullUp(inPinNum),
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adaptors.WithGpioDebounce(inPinNum, 2*time.Second))
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inPin := gpio.NewDirectPinDriver(board, inPinNum)
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outPin := gpio.NewDirectPinDriver(board, outPinNum)
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outPinInverted := gpio.NewDirectPinDriver(board, outPinInvertedNum)
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work := func() {
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level := byte(1)
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gobot.Every(500*time.Millisecond, func() {
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read, err := inPin.DigitalRead()
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fmt.Printf("pin %s state is %d\n", inPinNum, read)
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if err != nil {
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fmt.Println(err)
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} else {
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level = byte(read)
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}
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err = outPin.DigitalWrite(level)
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fmt.Printf("pin %s is now %d\n", outPinNum, level)
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if err != nil {
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fmt.Println(err)
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}
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err = outPinInverted.DigitalWrite(level)
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fmt.Printf("pin %s is now not %d\n", outPinInvertedNum, level)
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if err != nil {
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fmt.Println(err)
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}
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if level == 1 {
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level = 0
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} else {
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level = 1
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}
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})
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}
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robot := gobot.NewRobot("pinBot",
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[]gobot.Connection{board},
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[]gobot.Device{inPin, outPin, outPinInverted},
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work,
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)
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robot.Start()
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}
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