Quick and Dirty Pi 256x256 Raster Display using a TLC7528CN DAC

pi-dac.c

#include <stdio.h>
#include "pico/stdlib.h"
#include "hardware/gpio.h"
#include "test.h"

#define FIRST_GPIO 0

char frame[256][256] = {0};

int main() {
    for(int i = 0; i < 65536; i++) {
        char *target;
        target = frame;
        target[i] = header_data[i];
    }
    for (int gpio = FIRST_GPIO; gpio < FIRST_GPIO + 17; gpio++) {
        gpio_init(gpio);
        gpio_set_dir(gpio, GPIO_OUT);
    }
    int32_t val = 0;
    char x, y;
    while (true) {
        val++;
        val = val & 0xffff;
        x = val & 0xff;
        y = val >> 8;
        if(frame[255-x][y] == 0) {
            gpio_put_all(val | 0x10000);
        } else {
            gpio_put_all(val);
        }
    }
    return 0;
}