Difference between revisions of "Lesson 2--Microduino "Multiple LEDs""

void setup() {                
//Define microduino digital I/O port D3~D10 as output   
  for(int i=3;i<11;i++)
  pinMode(i, OUTPUT);     
}
void loop() {
  for(int i=3;i<11;i++)
  {
  digitalWrite(i, HIGH); // Digital I/O port i(D3~D10) outputs high
  delay(50);            //delay 50ms  
  digitalWrite(i, LOW); //// Digital I/O port i(D3~D10) outputs low
  delay(50);           //delay 50ms    
  }
}

/*===============================================
1 means LED is on. 0 means LED is off.
Example:
0x81:10000001
10,9,8,7,6,5,4,3
 ↓ ↓ ↓ ↓ ↓ ↓ ↓ ↓
 1 0 0 0 0 0 0 1
The LEDs connected to ports 10 and 3 in this case would be on.

=================================================*/
long  data[]=
{
  0x01,0x02,0x04,0x08,0x10,0x20,0x40,0x80,//From left to right light
  0x80,0x40,0x20,0x10,0x08,0x04,0x02,0x01,//From right to left light
  0x81,0x42,0x24,0x18,0x18,0x24,0x42,0x81,//Both sides to the middle and middle to both sides bright light
  0x01,0x03,0x07,0x0f,0x1f,0x3f,0x7f,0xff,//Lit from left to right
  0xff,0x7f,0x3f,0x1f,0x0f,0x07,0x03,0x01,//From right to left extinguished
};

void setup() 
{                
  for(int x=3;x<11;x++) 
  {
    pinMode(x,OUTPUT);//Set the output pin
  }  
}


void loop() 
{
  for(int x=0;x<40;x++)//Reading different pattern's lights
  {
    leddisplay(data[x]);
    delay(200); //Every state displays 200ms
  }
  leddisplay(0x00);//Cycle is completed, then all extinguished
  delay(200);
}

void leddisplay(int num)    // Mapping the pattern matrix to the port display
{
/*====================================================================
Firstly right shift the hexadecimal number x bits (num >> x), 
x represents the microduino I/O port corresponding hexadecimal bit, 
0 is the lowest bit, bit 7 is the highest bit. 
Then, use the bitwise AND operation with the shifted data and 0x01 to get the corresponding binary digit at port x (0 or 1).  
 ====================================================================*/
  digitalWrite(3, ((num>>0)&0x01));
  digitalWrite(4, ((num>>1)&0x01));
  digitalWrite(5, ((num>>2)&0x01));
  digitalWrite(6, ((num>>3)&0x01));
  digitalWrite(7, ((num>>4)&0x01));
  digitalWrite(8, ((num>>5)&0x01));
  digitalWrite(9,((num>>6)&0x01));
  digitalWrite(10,((num>>7)&0x01));
}