源码

/*A blinker example using go-rpio library.
Requires administrator rights to runToggles a LED on physical pin 19 (mcu pin 10)
Connect a LED with resistor from pin 19 to ground.*/package mainimport ("fmt""github.com/stianeikeland/go-rpio/v4""os""time"
)var (// Use mcu pin 10, corresponds to physical pin 19 on the pipin = rpio.Pin(21)
)func main() {// Open and map memory to access gpio, check for errorsif err := rpio.Open(); err != nil {fmt.Println(err)os.Exit(1)}// Unmap gpio memory when donedefer rpio.Close()// Set pin to output modepin.Output()// Toggle pin 20 timesfor x := 0; x < 20; x++ {pin.Toggle()time.Sleep(time.Second / 5)}
}

树莓派操作

  415  mkdir my
  416  mv gpio.go my
  417  cd my/
  418   go mod init hello
  419  go mod tidy
  420  go build gpio.go 
  421  ./gpio 

效果:GND-GND LED+连接GPIO21 也就是最边上的一对儿

一闪一闪