/****************************************************************************
*  Copyright (c) 2011 by Michael Blandford. All rights reserved.
*
*  Redistribution and use in source and binary forms, with or without
*  modification, are permitted provided that the following conditions
*  are met:
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*     without specific prior written permission.
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****************************************************************************/

#ifndef sound_driver_h
#define sound_driver_h

#define NUM_VOL_LEVELS	24

extern void startSound( void ) ;
extern void buzzer_on( void ) ;
extern void buzzer_off( void ) ;
extern void buzzer_sound( uint8_t time ) ;
extern void setFrequency( uint32_t frequency ) ;
extern void start_timer1( void ) ;
extern void initDac( void ) ;
extern void end_sound( void ) ;
extern void write_coprocessor( uint8_t *ptr, uint32_t count ) ;
extern void read_coprocessor( bool onlytemp=false ) ;
extern uint8_t Coproc_read ;
extern int8_t Coproc_valid ;
extern int8_t Coproc_temp ;

extern uint16_t *nextAudioData;
extern uint16_t nextAudioSize;

inline void toneStart()
{
  PMC->PMC_PCER0 |= 0x40000000L ; // Enable peripheral clock to DAC
  DACC->DACC_IER = DACC_IER_ENDTX ;
}

inline void toneStop()
{
  DACC->DACC_IDR = DACC_IDR_ENDTX ; // Disable interrupt
}

extern volatile uint8_t Buzzer_count ;

extern void init_twi( void ) ;
extern void setVolume( register uint8_t volume ) ;
extern "C" void TWI0_IRQHandler (void) ;

#endif