#define I2C_SCROLLER   (*(volatile unsigned long*)(0x7000C140))

    unsigned int scroller_value;
    char buf[128];
    
    while(1)
    {
        scroller_value = I2C_SCROLLER;
        snprintf(buf, sizeof(buf), "I2C_SCROLLER: %02x", scroller_value);
        lcd_puts(0, 0, buf);
        lcd_update();
    }