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add advanced digital pin options (pull, bias, drive, debounce, event)
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,78 @@ | ||
| // +build example | ||
| // | ||
| // Do not build by default. | ||
|
|
||
| package main | ||
|
|
||
| import ( | ||
| "fmt" | ||
| "time" | ||
|
|
||
| "gobot.io/x/gobot" | ||
| "gobot.io/x/gobot/drivers/gpio" | ||
| "gobot.io/x/gobot/platforms/adaptors" | ||
| "gobot.io/x/gobot/platforms/raspi" | ||
| ) | ||
|
|
||
| // Wiring | ||
| // PWR Raspi: 1 (+3.3V, VCC), 2(+5V), 6, 9, 14, 20 (GND) | ||
| // GPIO Raspi: header pin 21 (GPIO9) is input, pin 24 (GPIO8) is normal output, pin 26 (GPIO7) is inverted output | ||
| // Button: the input pin is wired with a button to GND, the internal pull up resistor is used | ||
| // 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 | ||
| // Expected behavior: always one LED is on, the other in opposite state, if button is pressed for >2 seconds the state changes | ||
| func main() { | ||
| const ( | ||
| inPinNum = "21" | ||
| outPinNum = "24" | ||
| outPinInvertedNum = "26" | ||
| ) | ||
| // note: WithGpiosOpenDrain() is optional, if using WithGpiosOpenSource() the LED's will not light up | ||
| board := raspi.NewAdaptor(adaptors.WithGpiosActiveLow(outPinInvertedNum), | ||
| adaptors.WithGpiosOpenDrain(outPinNum, outPinInvertedNum), | ||
| adaptors.WithGpiosPullUp(inPinNum), | ||
| adaptors.WithGpioDebounce(inPinNum, 2*time.Second)) | ||
|
|
||
| inPin := gpio.NewDirectPinDriver(board, inPinNum) | ||
| outPin := gpio.NewDirectPinDriver(board, outPinNum) | ||
| outPinInverted := gpio.NewDirectPinDriver(board, outPinInvertedNum) | ||
|
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| work := func() { | ||
| level := byte(1) | ||
|
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| gobot.Every(500*time.Millisecond, func() { | ||
| read, err := inPin.DigitalRead() | ||
| fmt.Printf("pin %s state is %d\n", inPinNum, read) | ||
| if err != nil { | ||
| fmt.Println(err) | ||
| } else { | ||
| level = byte(read) | ||
| } | ||
|
|
||
| err = outPin.DigitalWrite(level) | ||
| fmt.Printf("pin %s is now %d\n", outPinNum, level) | ||
| if err != nil { | ||
| fmt.Println(err) | ||
| } | ||
|
|
||
| err = outPinInverted.DigitalWrite(level) | ||
| fmt.Printf("pin %s is now not %d\n", outPinInvertedNum, level) | ||
| if err != nil { | ||
| fmt.Println(err) | ||
| } | ||
|
|
||
| if level == 1 { | ||
| level = 0 | ||
| } else { | ||
| level = 1 | ||
| } | ||
| }) | ||
| } | ||
|
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| robot := gobot.NewRobot("pinBot", | ||
| []gobot.Connection{board}, | ||
| []gobot.Device{inPin, outPin, outPinInverted}, | ||
| work, | ||
| ) | ||
|
|
||
| robot.Start() | ||
| } |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,97 @@ | ||
| // +build example | ||
| // | ||
| // Do not build by default. | ||
|
|
||
| package main | ||
|
|
||
| import ( | ||
| "fmt" | ||
| "time" | ||
|
|
||
| "gobot.io/x/gobot" | ||
| "gobot.io/x/gobot/platforms/raspi" | ||
| "gobot.io/x/gobot/system" | ||
| ) | ||
|
|
||
| const ( | ||
| inPinNum = "21" | ||
| outPinNum = "24" | ||
| outPinInvertedNum = "26" | ||
| debounceTime = 2 * time.Second | ||
| ) | ||
|
|
||
| var ( | ||
| outPin gobot.DigitalPinner | ||
| outPinInverted gobot.DigitalPinner | ||
| ) | ||
|
|
||
| // Wiring | ||
| // PWR Raspi: 1 (+3.3V, VCC), 2(+5V), 6, 9, 14, 20 (GND) | ||
| // GPIO Raspi: header pin 21 (GPIO9) is input, pin 24 (GPIO8) is normal output, pin 26 (GPIO7) is inverted output | ||
| // Button: the input pin is wired with a button to GND, the internal pull up resistor is used | ||
| // 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 | ||
| // Expected behavior: always one LED is on, the other in opposite state, if button is pressed for >2 seconds the state changes | ||
| func main() { | ||
|
|
||
| board := raspi.NewAdaptor() | ||
|
|
||
| work := func() { | ||
| inPin, err := board.DigitalPin(inPinNum) | ||
| if err != nil { | ||
| fmt.Println(err) | ||
| } | ||
| if err := inPin.ApplyOptions(system.WithPinDirectionInput(), system.WithPinPullUp(), | ||
| system.WithPinDebounce(debounceTime), system.WithPinEventOnBothEdges(buttonEventHandler)); err != nil { | ||
| fmt.Println(err) | ||
| } | ||
|
|
||
| // note: WithPinOpenDrain() is optional, if using WithPinOpenSource() the LED's will not light up | ||
| outPin, err = board.DigitalPin(outPinNum) | ||
| if err != nil { | ||
| fmt.Println(err) | ||
| } | ||
| if err := outPin.ApplyOptions(system.WithPinDirectionOutput(1), system.WithPinOpenDrain()); err != nil { | ||
| fmt.Println(err) | ||
| } | ||
|
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| outPinInverted, err = board.DigitalPin(outPinInvertedNum) | ||
| if err != nil { | ||
| fmt.Println(err) | ||
| } | ||
| if err := outPinInverted.ApplyOptions(system.WithPinActiveLow(), system.WithPinDirectionOutput(1), | ||
| system.WithPinOpenDrain()); err != nil { | ||
| fmt.Println(err) | ||
| } | ||
|
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| fmt.Printf("\nPlease press and hold the button for at least %s\n", debounceTime) | ||
| } | ||
|
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| robot := gobot.NewRobot("pinEdgeBot", | ||
| []gobot.Connection{board}, | ||
| []gobot.Device{}, | ||
| work, | ||
| ) | ||
|
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| robot.Start() | ||
| } | ||
|
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| func buttonEventHandler(offset int, t time.Duration, et string, sn uint32, lsn uint32) { | ||
| fmt.Printf("%s: %s detected on line %d with total sequence %d and line sequence %d\n", t, et, offset, sn, lsn) | ||
| level := 1 | ||
|
|
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| if et == "falling edge" { | ||
| level = 0 | ||
| } | ||
|
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| err := outPin.Write(level) | ||
| fmt.Printf("pin %s is now %d\n", outPinNum, level) | ||
| if err != nil { | ||
| fmt.Println(err) | ||
| } | ||
|
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| err = outPinInverted.Write(level) | ||
| fmt.Printf("pin %s is now not %d\n", outPinInvertedNum, level) | ||
| if err != nil { | ||
| fmt.Println(err) | ||
| } | ||
| } |
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