133 lines
2.7 KiB
Go
133 lines
2.7 KiB
Go
//go:build example
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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/v2"
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"gobot.io/x/gobot/v2/drivers/i2c"
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"gobot.io/x/gobot/v2/platforms/raspi"
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)
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// Wiring
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// PWR Raspi: 1 (+3.3V, VCC), 6, 9, 14, 20 (GND)
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// I2C1 Raspi: 3 (SDA), 5 (SCL)
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// PCA9533: 8 (VDD, +2.3..5.5V), 4 (VSS, GND), 7 (SDA), 6 (SCL)
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// LED pins: 1 (LED0), 2 (LED1), 3 (LED2), 5 (LED3)
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// LED's directly driven with pull-up resistors to VDD, e.g. 180 Ohm
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// I2C addresses: 0x62 (PCA9533/01), 0x63 (PCA9533/02)
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func main() {
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board := raspi.NewAdaptor()
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pca := i2c.NewPCA953xDriver(board, i2c.WithAddress(0x63))
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led := uint8(0) // index of LED
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wVal := uint8(1) // start with LED is "off"
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rVal := uint8(0)
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work := func() {
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// LED 2 with 5 Hz 1:1, LED 3 with 1 Hz 1:10
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initialize(pca, 5, 1)
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gobot.Every(2000*time.Millisecond, func() {
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fmt.Printf("set LED%d output to %d", led, wVal)
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err := pca.WriteGPIO(led, wVal)
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if err != nil {
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fmt.Println("errW:", err)
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}
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rVal, err = pca.ReadGPIO(led)
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if err != nil {
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fmt.Println("errR:", err)
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}
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if rVal == 0 {
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fmt.Printf(" - LED%d is ON\n", led)
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} else {
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fmt.Printf(" - LED%d is OFF\n", led)
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}
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led = led + 1
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if led > 1 {
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led = 0
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if wVal == 1 {
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wVal = 0
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} else {
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wVal = 1
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}
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}
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})
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}
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robot := gobot.NewRobot("ledI2c",
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[]gobot.Connection{board},
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[]gobot.Device{pca},
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work,
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)
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err := robot.Start()
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if err != nil {
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fmt.Println(err)
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}
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}
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func initialize(pca *i2c.PCA953xDriver, led2FrequHz float32, led3FrequHz float32) {
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// prepare PWM0
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err := pca.WriteFrequency(0, led2FrequHz)
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if err != nil {
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fmt.Println("errWF0:", err)
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}
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frq, err := pca.ReadFrequency(0)
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if err != nil {
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fmt.Println("errRF0:", err)
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}
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fmt.Println("get Frq0:", frq)
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err = pca.WriteDutyCyclePercent(0, 50)
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if err != nil {
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fmt.Println("errWD0:", err)
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}
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dc, err := pca.ReadDutyCyclePercent(0)
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if err != nil {
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fmt.Println("errRD0:", err)
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}
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fmt.Println("get dc0:", dc)
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// prepare PWM1
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err = pca.WriteFrequency(1, led3FrequHz)
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if err != nil {
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fmt.Println("errWF1:", err)
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}
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frq, err = pca.ReadFrequency(1)
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if err != nil {
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fmt.Println("errRF1:", err)
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}
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fmt.Println("get Frq1:", frq)
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err = pca.WriteDutyCyclePercent(1, 10)
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if err != nil {
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fmt.Println("errWD1:", err)
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}
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dc, err = pca.ReadDutyCyclePercent(1)
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if err != nil {
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fmt.Println("errRD1:", err)
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}
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fmt.Println("get dc1:", dc)
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// LED 2
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fmt.Println("set LED: 2 to: pwm0")
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err = pca.SetLED(2, i2c.PCA953xModePwm0)
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if err != nil {
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fmt.Println("errW:", err)
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}
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fmt.Println("set LED: 3 to: pwm1")
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err = pca.SetLED(3, i2c.PCA953xModePwm1)
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if err != nil {
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fmt.Println("errW:", err)
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}
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}
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