ArduinoUNOとGPIOで800khz(1.25us)を作る

目的
GPIOのテスト

// the setup function runs once when you press reset or power the board
void setup() {
  // initialize digital pin LED_BUILTIN as an output.
  pinMode(13, OUTPUT);
}

//              76543210
#define on1   0b00100000
#define off1  0b00000000

// the loop function runs over and over again forever
void loop() {
  //digitalWrite(13, HIGH);   // turn the LED on (HIGH is the voltage level)
//PORTD |= _BV(5);
//        76543210   
//PORTB = 0b00100000;
//PORTB = on1;
//  delay(1000);                       // wait for a second
//PORTD &= ~_BV(5);
//        76543210
//PORTB = 0b00000000;
//PORTB = off1;
//  digitalWrite(13, LOW);    // turn the LED off by making the voltage LOW
//  delay(1000);                       // wait for a second

while(1){

  PORTB = on1; //1
  PORTB = on1; //2
  PORTB = on1; //3
  PORTB = on1; //4
  PORTB = on1; //5
  PORTB = on1; //6
  PORTB = on1; //7
  PORTB = on1; //8


  PORTB = off1; //1
  PORTB = off1; //2
  PORTB = off1; //3
  PORTB = off1; //4
  PORTB = off1; //5
  PORTB = off1; //6
  PORTB = off1; //7
  PORTB = off1; //8



}//while






}