implement PWT buzzer driver The piece implemented here is the low-level driver component; there will also be a higher-level buzzer melody player service, to be implemented in RiViera land, that will be the sole caller of PWT API functions provided by the present driver.

/*
 * This header file is a FreeCalypso addition: it defines the functional
 * interface to the hardware vibrator driver.
 */

void HW_vibrator_on(SYS_UWORD8 level);
void HW_vibrator_off(void);