void BUZZER_Handler( void )
{
switch ( Buzzer_Mode )
{
case BUZZER_PLAYMUSIC :
if ( Buzzer_Counter <= 0 )
{
/* Play next note*/
BUZZER_PlayNote();
}
else
{
/* Continue the current note*/
Buzzer_Counter--;
}
break;
case BUZZER_SHORTBEEP :
if ( Buzzer_Counter++ >= WEIGHTED_TIME( BUZZER_SHORTBEEP_DURATION ) )
{
BUZZER_SetMode( BUZZER_OFF );
}
break;
case BUZZER_LONGBEEP :
if ( Buzzer_Counter++ >= WEIGHTED_TIME( BUZZER_LONGBEEP_DURATION ) )
{
BUZZER_SetMode( BUZZER_OFF );
}
break;
}
}
NODEBUG2 void BUZZER_Init( void )
{
#if !AUDIO_AVAIL
GPIO_InitTypeDef GPIO_InitStructure;
/* Enable GPIOB clock */
RCC_PERIPH_GPIO_CLOCK_CMD( RCC_APB2Periph_GPIOB, ENABLE );
/* GPIOB Configuration: TIM3 3in Output */
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_0;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_PP;
GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
GPIO_Init( GPIOB, &GPIO_InitStructure );
/* TIM3 Configuration ------------------------------------------------------*/
/* TIM3CLK = 18 MHz, Prescaler = 0x0, TIM3 counter clock = 18 MHz */
/* CC update rate = TIM3 counter clock / (2* CCR_Val) ~= 750 Hz */
/* Enable TIM3 clock */
RCC_APB1PeriphClockCmd( RCC_APB1Periph_TIM3, ENABLE );
TIM_DeInit( TIM3 );
TIM_TimeBaseStructInit( &TIM_TimeBaseStructure );
TIM_OCStructInit( &TIM_OCInitStructure );
/* Time base configuration */
TIM_TimeBaseStructure.TIM_Period = 0xFFFF;
TIM_TimeBaseStructure.TIM_Prescaler = 0x0;
TIM_TimeBaseStructure.TIM_ClockDivision = 0x0;
TIM_TimeBaseStructure.TIM_CounterMode = TIM_CounterMode_Up;
TIM_TimeBaseInit( TIM3, &TIM_TimeBaseStructure );
/* Output Compare Toggle Mode configuration: Channel3 */
TIM_OCInitStructure.TIM_OCMode = TIM_OCMode_Toggle;
/* in FWLib v1.0 : TIM_OCInitStructure.TIM_Channel = TIM_Channel_3;*/
TIM_OCInitStructure.TIM_OutputState = TIM_OutputState_Enable; /* now in in FWLib v2.0*/
TIM_OCInitStructure.TIM_Pulse = CCR_Val;
TIM_OC3Init( TIM3, &TIM_OCInitStructure ); /* changed against FWLib v2.0*/
TIM_OC3PreloadConfig( TIM3, TIM_OCPreload_Disable );
BUZZER_SetFrequency( 440 );
#endif
#if AUDIO_AVAIL
/* RQ : init done by Audio init*/
#endif
BUZZER_SetMode( BUZZER_OFF );
}
void BUZZER_PlayMusic( const u8* melody )
{
u8 c;
u8 default_id = 0;
u16 default_val = 0;
DefaultOctave = OCT_880; /* Default for the default Octave.*/
DefaultDuration = 4; /* Default for the default Duration.*/
DefaultBeats = 63;
CurrentMelody = melody;
CurrentMelodySTART = melody;
while ( *CurrentMelody != RTTTL_SEP )
{
if ( *CurrentMelody == 0 )
{
return;
}
/* Discard the melody name.*/
CurrentMelody++;
}
/* Now read the defaults if any.*/
for ( ++CurrentMelody; *CurrentMelody != RTTTL_SEP; CurrentMelody++ )
{
if ( *CurrentMelody == 0 )
{
return;
}
/* Discard any blank.*/
while ( *CurrentMelody == ' ' )
{
CurrentMelody++;
}
c = *CurrentMelody;
if ( c == RTTTL_SEP )
{
break;
}
if (( c >= 'a' ) && ( c <= 'z' ) )
{
c += ( 'A' - 'a' );
}
if (( c >= 'A' ) && ( c <= 'Z' ) )
{
default_id = c;
continue;
}
if (( c >= '0' ) && ( c <= '9' ) )
{
default_val *= 10;
default_val += ( c - '0' );
c = * ( CurrentMelody + 1 );
if (( c >= '0' ) && ( c <= '9' ) )
{
continue;
}
if ( default_id == 'D' )
{
DefaultDuration = default_val;
}
else if ( default_id == 'O' )
{
DefaultOctave = default_val - 5;
if ( DefaultOctave > OCT_7040 )
DefaultOctave = OCT_440;
}
else if ( default_id == 'B' )
{
DefaultBeats = default_val;
/* Check minimum BPM, so that the counter can be a 16-bit value */
if (( DefaultBeats < 16 ) || ( DefaultBeats > 500 ) )
DefaultBeats = 63;
}
default_val = 0;
default_id = 0;
}
}
BUZZER_SetMode( BUZZER_PLAYMUSIC );
}
void BUZZER_PlayNote( void )
{
u8 duration = DefaultDuration;
u8 c;
/* Discard blank characters*/
while ( *CurrentMelody == ' ' )
{
CurrentMelody++;
}
/* Check whether a duration is present.*/
if (( *CurrentMelody > '0' ) && ( *CurrentMelody < '9' ) )
{
duration = *CurrentMelody++ - '0';
if (( *CurrentMelody > '0' ) && ( *CurrentMelody < '9' ) )
{
duration *= 10;
duration += ( *CurrentMelody++ - '0' );
}
}
#if __RCSTM8__
// Compute the number of milliseconds of the given note
// Buzzer_Counter = 32L * 60 * 1000 / duration / DefaultBeats; // This is the THEORETICAL value
Buzzer_Counter = 35000 / DefaultBeats * 10 / duration; // This is the value that matches CircleOS3
#else
// TODO verify the code and rewrite for efficiency
Buzzer_Counter = (( 32 / duration ) * 256L * 32L ) / DefaultBeats;
Buzzer_Counter *= ( SYSTEM_CLOCK / 12000L );
Buzzer_Counter /= 1000L; /*FL081103 divide in two stages to keep precision*/
#endif
/* Read the note*/
c = *CurrentMelody++;
if (( c >= 'a' ) && ( c <= 'z' ) )
{
c += ( 'A' - 'a' );
}
if ( c == 'P' )
{
note = NOTE_PAUSE;
}
else if (( c >= 'A' ) && ( c <= 'G' ) )
{
note = ( c - 'A' ) + NOTE_LA;
if ( *CurrentMelody == '#' )
{
note |= 0x8;
CurrentMelody++;
}
}
octave = DefaultOctave;
c = *CurrentMelody;
if (( c >= '5' ) && ( c <= '8' ) )
{
octave = OCT_440 + ( c - '5' );
CurrentMelody++;
}
BUZZER_SetFrequency(( Note_Freq[note] *( 1 << octave ) ) );
/* Handle special duration */
if ( *CurrentMelody == '.' )
{
/* Dotted note: Add half duration */
Buzzer_Counter += ( Buzzer_Counter / 2 );
CurrentMelody++;
}
/* Discard delimiter */
while (( c = *CurrentMelody++ ) != 0 )
{
if ( c == ',' )
break;
}
/* Check end of melody */
if ( c == 0 )
{
CurrentMelody = 0;
BUZZER_SetMode( BUZZER_OFF );
}
}
static void PlayMusic( void )
{
u8 duration = DefaultDuration;
u8 c;
// Discard blank characters
while ( *CurrentMelody == ' ') {
CurrentMelody++;
}
// Check whether a duration is present.
if ( (*CurrentMelody > '0') && (*CurrentMelody < '9') ) {
duration = *CurrentMelody++ - '0';
if ( (*CurrentMelody > '0') && (*CurrentMelody < '9') ) {
duration *= 10;
duration += (*CurrentMelody++ - '0');
}
}
Buzzer_Counter = ( (32/duration) * 256L * 32L) / DefaultBeats;
Buzzer_Counter*= (RCC_ClockFreq.SYSCLK_Frequency / 12000000L); //Adapt to HCLK1
//read the note
c = *CurrentMelody++;
if ( (c >= 'a') && (c <= 'z') ) {
c+=('A'-'a');
}
if ( c == 'P' ) {
note = NOTE_PAUSE;
} else if ( (c >= 'A') && (c <= 'G') ) {
note = (c - 'A') + NOTE_LA;
if ( *CurrentMelody == '#' ) {
note|=0x8;
CurrentMelody++;
}
}
octave = DefaultOctave;
c = *CurrentMelody;
if ( (c>= '5') && (c<= '8') ) {
octave = OCT_440 + (c-'5');
CurrentMelody++;
}
BUZZER_SetFrequency ( (Note_Freq [ note ] * (1<<octave)));
//discard delimiter and ignore special duration
while ( (c = *CurrentMelody++) != 0 ) {
if ( c==',')
break;
}
if ( *(CurrentMelody-1)==0 ) {
CurrentMelody = 0;
}
if ( c == 0 ) {
BUZZER_SetMode ( BUZZER_OFF );
}
}
