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/*
Blink
Turns on an LED on for one second, then off for one second, repeatedly.
This example code is in the public domain.
*/
#define ROW 3
#define COL 0
#define ROWCNT 3
#define COLCNT 3
#define DELAY 3
int frame[3][3] = {
{0, 0, 0},
{0, 0, 0},
{0, 0, 0},
};
int framenr = 0;
int rownr = 0;
void setup() {
// initialize the digital pin as an output.
// Pin 13 has an LED connected on most Arduino boards:
int i;
for (i = 0;i < ROWCNT; i++)
pinMode(ROW + i, OUTPUT);
for (i = 0;i < COLCNT; i++)
pinMode(COL + i, OUTPUT);
}
void nextFrame() {
frame[0][0] = (framenr % 100) < 50;
frame[0][1] = (framenr % 100) < 50;
frame[0][2] = (framenr % 100) < 50;
frame[1][0] = (framenr % 100) < 50;
frame[1][1] = (framenr % 100) >= 50;
frame[1][2] = (framenr % 100) < 50;
frame[2][0] = (framenr % 100) < 50;
frame[2][1] = (framenr % 100) < 50;
frame[2][2] = (framenr % 100) < 50;
}
void loop() {
int i;
rownr = ( rownr + 1 ) % ROWCNT;
if (rownr == 0) {
framenr++;
nextFrame();
}
for (i = 0; i < COLCNT; i++) {
digitalWrite(COL + i, frame[rownr][i]);
}
digitalWrite(ROW + rownr, HIGH);
delay(DELAY);
digitalWrite(ROW + rownr, LOW);
}
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