// --------------------------------------------------------

#define LEN_HEART 10

void heart(void)
{
    uint8_t sign_heart[LEN_HEART] =
    {
        0b00000000,
        0b00001100,
        0b00011110,
        0b00111110,
        0b01111100,
        0b11111000,
        0b01111100,
        0b00111110,
        0b00011110,
        0b00001100,
    };

    int i = 0;
    while(1)
    {
        reg_leds = sign_heart[i];

#if 0
        print_hex(sign_heart[i], 2);
        print("  ");
        print_hex(i, 2);
        print("\n");
#endif

        i++;
        i %= LEN_HEART;
        int t = 100;
        while (t--) __asm__ volatile ("nop");
    }
}

// --------------------------------------------------------