#include #include #define CLK 13 #define DIN 11 #define CS 10 #define X_SEGMENTS 8 #define Y_SEGMENTS 4 #define NUM_SEGMENTS (X_SEGMENTS * Y_SEGMENTS) byte fb[8 * NUM_SEGMENTS]; byte nextFb[8 * NUM_SEGMENTS]; void shiftAll(byte send_to_address, byte send_this_data) { digitalWrite(CS, LOW); for (int i = 0; i < NUM_SEGMENTS; i++) { shiftOut(DIN, CLK, MSBFIRST, send_to_address); shiftOut(DIN, CLK, MSBFIRST, send_this_data); } digitalWrite(CS, HIGH); } void setup() { Serial.begin(115200); pinMode(CLK, OUTPUT); pinMode(DIN, OUTPUT); pinMode(CS, OUTPUT); shiftAll(0x0f, 0x00); shiftAll(0x0b, 0x07); shiftAll(0x0c, 0x01); shiftAll(0x0a, 0x0f); shiftAll(0x09, 0x00); memset(fb, 0, sizeof(fb)); randomSeed(analogRead(0)); for (int i = 0; i < 4000; i++) { int x = random(0, X_SEGMENTS * 8); int y = random(0, Y_SEGMENTS * 8); set_pixel(x, y, true); } } void loop() { updateVonNeumann(); show(); delay(1); } void updateVonNeumann() { for (int i = 0; i < 8 * NUM_SEGMENTS; i++) { nextFb[i] = fb[i]; } for (int y = 0; y < Y_SEGMENTS * 8; y++) { for (int x = 0; x < X_SEGMENTS * 8; x++) { int neighbors = countNeighbors(x, y); if (fb[y * X_SEGMENTS + x / 8] & (1 << (7 - (x % 8)))) { if (neighbors < 2 || neighbors > 3) { set_next_pixel(x, y, false); } } else { if (neighbors == 2) { set_next_pixel(x, y, true); } } } } for (int i = 0; i < 8 * NUM_SEGMENTS; i++) { fb[i] = nextFb[i]; } } int countNeighbors(int x, int y) { int count = 0; // Von Neumann neighborhood: consider only north, east, south, and west neighbors if (fb[y * X_SEGMENTS + (x - 1 + X_SEGMENTS * 8) % (X_SEGMENTS * 8) / 8] & (1 << (7 - ((x - 1 + X_SEGMENTS * 8) % (X_SEGMENTS * 8) % 8)))) count++; // West if (fb[y * X_SEGMENTS + (x + 1 + X_SEGMENTS * 8) % (X_SEGMENTS * 8) / 8] & (1 << (7 - ((x + 1 + X_SEGMENTS * 8) % (X_SEGMENTS * 8) % 8)))) count++; // East if (fb[((y - 1 + Y_SEGMENTS * 8) % (Y_SEGMENTS * 8)) * X_SEGMENTS + x / 8] & (1 << (7 - (x % 8)))) count++; // North if (fb[((y + 1 + Y_SEGMENTS * 8) % (Y_SEGMENTS * 8)) * X_SEGMENTS + x / 8] & (1 << (7 - (x % 8)))) count++; // South return count; } void set_next_pixel(uint8_t x, uint8_t y, bool state) { byte *addr = &nextFb[x / 8 + y * X_SEGMENTS]; byte mask = 128 >> (x % 8); if (state) { *addr |= mask; } else { *addr &= ~mask; } } void set_pixel(uint8_t x, uint8_t y, bool state) { byte *addr = &fb[x / 8 + y * X_SEGMENTS]; byte mask = 128 >> (x % 8); if (state) { *addr |= mask; } else { *addr &= ~mask; } } void clear() { memset(fb, 0, sizeof(fb)); } void show() { for (byte row = 0; row < 8; row++) { digitalWrite(CS, LOW); byte segment = NUM_SEGMENTS; while (segment--) { byte x = segment % X_SEGMENTS; byte y = segment / X_SEGMENTS * 8; byte addr = (row + y) * X_SEGMENTS; if (segment & X_SEGMENTS) { shiftOut(DIN, CLK, MSBFIRST, 8 - row); shiftOut(DIN, CLK, LSBFIRST, fb[addr + x]); } else { shiftOut(DIN, CLK, MSBFIRST, 1 + row); shiftOut(DIN, CLK, MSBFIRST, fb[addr - x + X_SEGMENTS - 1]); } } digitalWrite(CS, HIGH); } }