_HPPA_LED_FREQ
#define HPPA_HEARTBEAT_CYCLES (_HPPA_LED_FREQ / 8)
led_cycle = (led_cycle + 1) & (_HPPA_LED_FREQ - 1);
callout_reset(&hppa_led_callout, hz / _HPPA_LED_FREQ,
_hppa_led_on_cycles[i] = (((ms) * _HPPA_LED_FREQ) / 1000); \