48 lines
1.0 KiB
Go
48 lines
1.0 KiB
Go
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// +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/nanopi"
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)
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// Wiring
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// PWR NanoPi: 1, 17 (+3.3V, VCC); 2, 4 (+5V, VDD); 6, 9, 14, 20 (GND)
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// GPIO NanoPi: the fourth header pin at inner USB side, count from USB side, is the PWM output
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// LED: the PWM output is NOT able to drive a 20mA LED with full brightness, so a custom driver or low current LED is needed
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// Expected behavior: the LED fades in and out
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func main() {
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r := nanopi.NewNeoAdaptor()
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led := gpio.NewLedDriver(r, "PWM")
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work := func() {
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brightness := uint8(0)
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fadeAmount := uint8(15)
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gobot.Every(100*time.Millisecond, func() {
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if err := led.Brightness(brightness); err != nil {
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fmt.Println(err)
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}
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brightness = brightness + fadeAmount
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if brightness == 0 || brightness == 255 {
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fadeAmount = -fadeAmount
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}
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})
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}
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robot := gobot.NewRobot("pwmBot",
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[]gobot.Connection{r},
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[]gobot.Device{led},
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work,
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)
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robot.Start()
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}
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