A simple binary counter and LED matrix
20/12/2018
Using this same technique I emulated an 8x8 LED matrix and created a bouncing ball demo. The code can be found in my git repo.
#include <stdio.h>
#include <unistd.h>
// website generator breaks with unicode, so fill in the unicode characters yourself
#define CIRCLE "CIRCLE"
#define BLACKCIRCLE "BLACKCIRCLE"
void
printleds(unsigned char value)
{
printf("\0337");
printf("%s", "\033[1;0F");
printf("%s", "\033[0J");
printf("%s\t%s\t%s\t%s\t%s\t%s\t%s\t%s\n",
(value & 1 << 7) ? BLACKCIRCLE : CIRCLE,
(value & 1 << 6) ? BLACKCIRCLE : CIRCLE,
(value & 1 << 5) ? BLACKCIRCLE : CIRCLE,
(value & 1 << 4) ? BLACKCIRCLE : CIRCLE,
(value & 1 << 3) ? BLACKCIRCLE : CIRCLE,
(value & 1 << 2) ? BLACKCIRCLE : CIRCLE,
(value & 1 << 1) ? BLACKCIRCLE : CIRCLE,
(value & 1 << 0) ? BLACKCIRCLE : CIRCLE
);
printf("\0338");
}
int
main(void)
{
unsigned char value = 0;
while (1)
{
printleds(value);
value++;
if (value >= 255)
value = 0;
sleep(1);
}
return 0;
}
