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#define PINOUT_SER 2
#define PINOUT_SCK 3
#define PINOUT_LCK 4
bool leds[16];
void animate() {
unsigned long t_offset = millis() % (unsigned long)15e3;
if(0e3 < t_offset && t_offset < 4e3) {
bool flip_state = (t_offset % 1000) > 500;
for(int i = 0; i < 16; i++) leds[i] = (i % 2 == flip_state) ^ (i / 4 % 2 == 0) > 0;
}
else if(4e3 < t_offset && t_offset < 7e3) {
bool flip_state = (t_offset % 1000) < 500;
for(int i = 0; i < 16; i++) leds[i] = flip_state;
}
else if(7e3 < t_offset && t_offset < 11e3) {
int index = (t_offset - 7e3) / 250;
int volgorde[16] = {0, 1, 2, 3, 7, 6, 5, 4, 8, 9, 10, 11, 15, 14, 13, 12};
leds[volgorde[(index - 1) % 16]] = 0;
leds[volgorde[index % 16]] = 1;
}
else if(11e3 < t_offset && t_offset < 15e3) {
int index = (t_offset - 11e3) / 250;
int volgorde[16] = {0, 1, 2, 3, 7, 6, 5, 4, 8, 9, 10, 11, 15, 14, 13, 12};
memset(&leds, 0, sizeof(int) * 16);
leds[volgorde[index % 16]] = 1;
leds[volgorde[15 - index]] = 1;
}
}
void setup() {
pinMode(PINOUT_LCK, OUTPUT);
pinMode(PINOUT_SCK, OUTPUT);
pinMode(PINOUT_SER, OUTPUT);
Serial.begin(115200);
}
void loop() {
animate();
for (int row = 0; row < 4; row++) {
unsigned char serdata = 0xff ^ (1 << (row + 4));
serdata = (serdata & 0b11110000) |
leds[row * 4 + 0] << 3 |
leds[row * 4 + 1] << 2 |
leds[row * 4 + 2] << 1 |
leds[row * 4 + 3] << 0;
digitalWrite(PINOUT_LCK, LOW);
shiftOut(PINOUT_SER, PINOUT_SCK, LSBFIRST, serdata);
digitalWrite(PINOUT_LCK, HIGH);
}
}
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