(gdb) where
#0  0x080006c4 in main () at main.c:70
(gdb) list
65
66      start_ms = uptime_ms;
67      gpio_set(GPIOB, GPIO14);
68      while(uptime_ms < 1) {
69
70      };
71      gpio_clear(GPIOB, GPIO14);
72
73
74      usbd_dev = usbd_setup();
(gdb) print uptime_ms
$6 = 12222
(gdb) c
Continuing.
^C
Program received signal SIGINT, Interrupt.
0x080006c4 in main () at main.c:70
70      };
(gdb) print uptime_ms
$7 = 13706
(gdb)