gobot.io/x/gobot@v1.16.0/examples/firmata_gpio_max7219.go (about)

     1  // +build example
     2  //
     3  // Do not build by default.
     4  
     5  /*
     6   How to setup
     7   This examples requires you to daisy-chain 4 led matrices based on MAX7219.
     8   It will turn on one led at a time, from the first led at the first matrix to the last led of the last matrix.
     9  
    10   How to run
    11   Pass serial port to use as the first param:
    12  
    13  	go run examples/firmata_gpio_max7219.go /dev/ttyACM0
    14  */
    15  
    16  package main
    17  
    18  import (
    19  	"os"
    20  	"time"
    21  
    22  	"gobot.io/x/gobot"
    23  	"gobot.io/x/gobot/drivers/gpio"
    24  	"gobot.io/x/gobot/platforms/firmata"
    25  )
    26  
    27  func main() {
    28  	firmataAdaptor := firmata.NewAdaptor(os.Args[1])
    29  	max := gpio.NewMAX7219Driver(firmataAdaptor, "11", "10", "9", 4)
    30  
    31  	var digit byte = 1 // digit address goes from 0x01 (MAX7219Digit0) to 0x08 (MAX7219Digit8)
    32  	var bits byte = 1
    33  	var module uint
    34  	count := 0
    35  
    36  	work := func() {
    37  		gobot.Every(100*time.Millisecond, func() {
    38  			max.ClearAll()
    39  			max.One(module, digit, bits)
    40  			bits = bits << 1
    41  
    42  			count++
    43  			if count > 7 {
    44  				count = 0
    45  				digit++
    46  				bits = 1
    47  				if digit > 8 {
    48  					digit = 1
    49  					module++
    50  					if module >= 4 {
    51  						module = 0
    52  						count = 0
    53  					}
    54  				}
    55  			}
    56  		})
    57  	}
    58  
    59  	robot := gobot.NewRobot("Max7219Bot",
    60  		[]gobot.Connection{esp8266},
    61  		[]gobot.Device{max},
    62  		work,
    63  	)
    64  
    65  	robot.Start()
    66  }