92 lines
2.2 KiB
Go
92 lines
2.2 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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"log"
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"time"
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"gobot.io/x/gobot"
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"gobot.io/x/gobot/drivers/aio"
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"gobot.io/x/gobot/drivers/i2c"
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"gobot.io/x/gobot/platforms/tinkerboard"
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)
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func main() {
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// This driver was tested with Tinkerboard and this board with temperature & brightness sensor:
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// https://www.makershop.de/download/YL_40_PCF8591.pdf
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//
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// Wiring
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// PWR Tinkerboard: 1 (+3.3V, VCC), 6, 9, 14, 20 (GND)
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// I2C1 Tinkerboard: 3 (SDA), 5 (SCL)
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// PCF8591 plate: wire AOUT --> AIN2 for this example
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board := tinkerboard.NewAdaptor()
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pcf := i2c.NewPCF8591Driver(board, i2c.WithBus(1))
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aout := aio.NewAnalogActuatorDriver(pcf, "AOUT")
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aout.SetScaler(aio.AnalogActuatorLinearScaler(0, 3.3, 0, 255))
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var val int
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var err error
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// brightness sensor, high brightness - low raw value
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descLight := "s.0"
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// temperature sensor, high temperature - low raw value
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// sometimes buggy, because not properly grounded
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descTemp := "s.1"
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// wired to AOUT
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descAIN2 := "s.2"
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// adjustable resistor, turn clockwise will lower the raw value
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descResi := "s.3"
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// the LED light is visible above ~1.7V, this means ~127 (half of 3.3V)
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writeVal := 1.7
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work := func() {
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gobot.Every(1000*time.Millisecond, func() {
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if err := aout.Write(writeVal); err != nil {
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fmt.Println(err)
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} else {
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log.Printf("Write AOUT: %.1f V [0..3.3]", writeVal)
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writeVal = writeVal + 0.1
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if writeVal > 3.3 {
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writeVal = 0
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}
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}
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if val, err = pcf.AnalogRead(descLight); err != nil {
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fmt.Println(err)
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} else {
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log.Printf("Brightness (%s): %d [255..0]", descLight, val)
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}
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if val, err = pcf.AnalogRead(descTemp); err != nil {
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fmt.Println(err)
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} else {
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log.Printf("Temperature (%s): %d [255..0]", descTemp, val)
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}
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if val, err = pcf.AnalogRead(descAIN2); err != nil {
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fmt.Println(err)
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} else {
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log.Printf("Read AOUT (%s): %d [0..255]", descAIN2, val)
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}
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if val, err = pcf.AnalogRead(descResi); err != nil {
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fmt.Println(err)
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} else {
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log.Printf("Resistor (%s): %d [255..0]", descResi, val)
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}
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})
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}
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robot := gobot.NewRobot("pcfBot",
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[]gobot.Connection{board},
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[]gobot.Device{pcf},
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work,
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)
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robot.Start()
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}
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