HDSP-2534 (Hewlett Packard)

HDSP-253x

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Připojení k Arduinu

Pin HDSP-2534	Název pinu HDSP-2534	Pin Arduino
1	RST	A0
2	FL	5V
3	A0	A2
4	A1	A3
5	A2	A4
6	A3	A5
7	NC	–
8	NC	–
9	NC	–
10	A4	5V
11	CLS	5V
12	CLK	–
13	WR	A1
14	CE	10
15	VCC	5V
16	GND	GND
17	NC	–
18	Logic GND	GND
19	RD	11
20	D0	0
21	D1	1
22	NC	–
23	NC	–
24	NC	–
25	D2	2
26	D3	3
27	D4	4
28	D5	5
29	D6	6
30	D7	7

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Zdrojový kód pro Arduino

/*
Original code www.josvandijken.nl
Based on the code from: Matt Joyce < matt at nycresistor.com >
                        Mark Tabry
*/
int RST   = A0;
int WR    = A1;
int CE    = 10;
int RD    = 11;
int AD0   = A2;
int AD1   = A3;
int AD2   = A4;
int AD3   = A5;
int D0    = 0;
int D1    = 1;
int D2    = 2;
int D3    = 3;
int D4    = 4;
int D5    = 5;
int D6    = 6;
int D7    = 7;
int incomingByte = 0;

void setup()
{
  pinMode(RST    , OUTPUT);
  pinMode(WR     , OUTPUT);
  pinMode(CE     , OUTPUT);
  pinMode(RD     , OUTPUT);
  pinMode(AD0    , OUTPUT);
  pinMode(AD1    , OUTPUT);
  pinMode(AD2    , OUTPUT);
  pinMode(AD3    , OUTPUT);
  pinMode(D0     , OUTPUT);
  pinMode(D1     , OUTPUT);
  pinMode(D2     , OUTPUT);
  pinMode(D3     , OUTPUT);
  pinMode(D4     , OUTPUT);
  pinMode(D5     , OUTPUT);
  pinMode(D6     , OUTPUT);
  pinMode(D7     , OUTPUT);
  digitalWrite(CE, HIGH);
  digitalWrite(WR, HIGH);
  resetDisplay();
}

void resetDisplay()
{
  digitalWrite(RST, LOW);
  delayMicroseconds(1);
  digitalWrite(RST, HIGH);
  delayMicroseconds(200);
  digitalWrite(AD3, HIGH);
}

void writeDisplay(char *input)
{
  for (int i = 0; i < 8; i++)
  {
    digitalWrite(AD0, (1 & i) != 0 ? HIGH : LOW);
    digitalWrite(AD1, (2 & i) != 0 ? HIGH : LOW);
    digitalWrite(AD2, (4 & i) != 0 ? HIGH : LOW);
    PORTD = input[i];
    delay(0);
    digitalWrite(CE, LOW);
    delay(0);
    digitalWrite(WR, LOW);
    delay(0);
    digitalWrite(WR, HIGH);
    delay(0);
    digitalWrite(CE, HIGH);
    //delay(5);
  }
}

void scrollDisplay(char *words)
{
  char buffer[8];
  int i = 0;
  while (words[i] != 0)
  {
    boolean blank = false;
    for (int j = 0; j < 8; j++)
    {
      if ( !blank && words[i + j] == 0 )
      {
        blank = true;
      }
      if ( blank )
      {
        buffer[j] = ' ';
      }
      else
      {
        buffer[j] = words[i + j];
      }
    }
    buffer[8] = 0;

    writeDisplay(buffer);
    delay(300);
    i++;
  }
}

void loop()
{
  char intro[] = "      *** HDSP-2534 DEMO *** MORE DISPLAYS ON CTVRTKY.CZ/SBIRKA-DISPLEJU-LED  ";
  scrollDisplay(intro);
}

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Demo video

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