void tone(uint32_t ulPin, uint32_t frequency, int32_t duration)
{
const uint32_t rc = VARIANT_MCK / 256 / frequency;
tone_pin = ulPin;
toggle_count = 0; // strange wipe out previous duration
if (duration > 0 ) toggle_count = 2 * frequency * duration / 1000;
else toggle_count = -1;
if (!TCChanEnabled) {
pmc_set_writeprotect(false);
pmc_enable_periph_clk((uint32_t)TONE_IRQ);
TC_Configure(chTC, chNo,
TC_CMR_TCCLKS_TIMER_CLOCK4 |
TC_CMR_WAVE | // Waveform mode
TC_CMR_WAVSEL_UP_RC ); // Counter running up and reset when equals to RC
chTC->TC_CHANNEL[chNo].TC_IER=TC_IER_CPCS; // RC compare interrupt
chTC->TC_CHANNEL[chNo].TC_IDR=~TC_IER_CPCS;
NVIC_EnableIRQ(TONE_IRQ);
TCChanEnabled = 1;
}
if (!pinEnabled[ulPin]) {
pinMode(ulPin, OUTPUT);
pinEnabled[ulPin] = 1;
}
TC_Stop(chTC, chNo);
TC_SetRC(chTC, chNo, rc); // set frequency
TC_Start(chTC, chNo);
}
void
vMBPortTimersDisable( )
{
TC_Stop( TCX, 0 );
#if MB_TIMER_DEBUG == 1
PIO_Clear( &xTimerDebugPins[0] );
#endif
}
static void finISR(timer16_Sequence_t timer) {
#if defined (_useTimer1)
TC_Stop(TC_FOR_TIMER1, CHANNEL_FOR_TIMER1);
#endif
#if defined (_useTimer2)
TC_Stop(TC_FOR_TIMER2, CHANNEL_FOR_TIMER2);
#endif
#if defined (_useTimer3)
TC_Stop(TC_FOR_TIMER3, CHANNEL_FOR_TIMER3);
#endif
#if defined (_useTimer4)
TC_Stop(TC_FOR_TIMER4, CHANNEL_FOR_TIMER4);
#endif
#if defined (_useTimer5)
TC_Stop(TC_FOR_TIMER5, CHANNEL_FOR_TIMER5);
#endif
}
void finISR(timer16_Sequence_t timer) {
#ifdef _useTimer1
TC_Stop(TC_FOR_TIMER1, CHANNEL_FOR_TIMER1);
#endif
#ifdef _useTimer2
TC_Stop(TC_FOR_TIMER2, CHANNEL_FOR_TIMER2);
#endif
#ifdef _useTimer3
TC_Stop(TC_FOR_TIMER3, CHANNEL_FOR_TIMER3);
#endif
#ifdef _useTimer4
TC_Stop(TC_FOR_TIMER4, CHANNEL_FOR_TIMER4);
#endif
#ifdef _useTimer5
TC_Stop(TC_FOR_TIMER5, CHANNEL_FOR_TIMER5);
#endif
}
// XXX: this function only works properly for timer 2 (the only one we use
// currently). for the others, it should end the tone, but won't restore
// proper PWM functionality for the timer.
void disableTimer(uint8_t _timer)
{
switch (_timer)
{
case 0:
#if defined(TIMSK0)
TIMSK0 = 0;
#elif defined(TIMSK)
TIMSK = 0; // atmega32
#endif
break;
#if defined(TIMSK1) && defined(OCIE1A)
case 1:
bitWrite(TIMSK1, OCIE1A, 0);
break;
#endif
case 2:
#if defined(TIMSK2) && defined(OCIE2A)
bitWrite(TIMSK2, OCIE2A, 0); // disable interrupt
#endif
#if defined(TCCR2A) && defined(WGM20)
TCCR2A = (1 << WGM20);
#endif
#if defined(TCCR2B) && defined(CS22)
TCCR2B = (TCCR2B & 0b11111000) | (1 << CS22);
#endif
#if defined(OCR2A)
OCR2A = 0;
#endif
break;
#if defined(TIMSK3)
case 3:
TIMSK3 = 0;
break;
#endif
#if defined(TIMSK4)
case 4:
TIMSK4 = 0;
break;
#endif
#if defined(TIMSK5)
case 5:
TIMSK5 = 0;
break;
#endif
#if defined(TC0)
case 6:
TC_Stop(TC1, 0);
break;
#endif
}
}
DueTimer& DueTimer::stop(void){
/*
Stop the timer
*/
NVIC_DisableIRQ(Timers[timer].irq);
TC_Stop(Timers[timer].tc, Timers[timer].channel);
return *this;
}
void BaseDMD::end()
{
NVIC_DisableIRQ(TC7_IRQn);
bool still_running = unregister_running_dmd(this);
if(still_running)
NVIC_EnableIRQ(TC7_IRQn); // Still some DMDs running
else
TC_Stop(TC2, 1);
clearScreen();
scanDisplay();
}
/**
* Enable/Disable audio channels
*/
static void AudioPlayEnable(uint8_t enable)
{
if (enable == 1) {
TC_Start(TC0, 0);
DACC_EnableChannel(DACC, CHANNEL_R);
DACC_EnableChannel(DACC, CHANNEL_L);
}
else if (enable == 0) {
TC_Stop(TC0, 0);
DACC_DisableChannel(DACC, CHANNEL_R);
DACC_DisableChannel(DACC, CHANNEL_R);
}
}
void tone(uint8_t _pin, unsigned int frequency, unsigned long duration)
{
uint8_t prescalarbits = 0b001;
long toggle_count = 0;
uint32_t ocr = 0;
int8_t _timer;
_timer = toneBegin(_pin);
if (_timer >= 0)
{
// Set the pinMode as OUTPUT
pinMode(_pin, OUTPUT);
// if we are using an 8 bit timer, scan through prescalars to find the best fit
if (_timer == 0 || _timer == 2)
{
ocr = F_CPU / frequency / 2 - 1;
prescalarbits = 0b001; // ck/1: same for both timers
if (ocr > 255)
{
ocr = F_CPU / frequency / 2 / 8 - 1;
prescalarbits = 0b010; // ck/8: same for both timers
if (_timer == 2 && ocr > 255)
{
ocr = F_CPU / frequency / 2 / 32 - 1;
prescalarbits = 0b011;
}
if (ocr > 255)
{
ocr = F_CPU / frequency / 2 / 64 - 1;
prescalarbits = _timer == 0 ? 0b011 : 0b100;
if (_timer == 2 && ocr > 255)
{
ocr = F_CPU / frequency / 2 / 128 - 1;
prescalarbits = 0b101;
}
if (ocr > 255)
{
ocr = F_CPU / frequency / 2 / 256 - 1;
prescalarbits = _timer == 0 ? 0b100 : 0b110;
if (ocr > 255)
{
// can't do any better than /1024
ocr = F_CPU / frequency / 2 / 1024 - 1;
prescalarbits = _timer == 0 ? 0b101 : 0b111;
}
}
}
}
#if defined(TCCR0B)
if (_timer == 0)
{
TCCR0B = prescalarbits;
}
else
#endif
#if defined(TCCR2B)
{
TCCR2B = prescalarbits;
}
#else
{
// dummy place holder to make the above ifdefs work
}
#endif
}
else
{
// two choices for the 16 bit timers: ck/1 or ck/64
ocr = F_CPU / frequency / 2 - 1;
prescalarbits = 0b001;
if (ocr > 0xffff)
{
ocr = F_CPU / frequency / 2 / 64 - 1;
prescalarbits = 0b011;
}
if (_timer == 1)
{
#if defined(TCCR1B)
TCCR1B = (TCCR1B & 0b11111000) | prescalarbits;
#endif
}
#if defined(TCCR3B)
else if (_timer == 3)
TCCR3B = (TCCR3B & 0b11111000) | prescalarbits;
#endif
#if defined(TCCR4B)
else if (_timer == 4)
TCCR4B = (TCCR4B & 0b11111000) | prescalarbits;
#endif
#if defined(TCCR5B)
else if (_timer == 5)
TCCR5B = (TCCR5B & 0b11111000) | prescalarbits;
#endif
}
// Calculate the toggle count
if (duration > 0)
{
toggle_count = 2 * frequency * duration / 1000;
}
else
{
toggle_count = -1;
}
// Set the OCR for the given timer,
// set the toggle count,
// then turn on the interrupts
switch (_timer)
{
#if defined(OCR0A) && defined(TIMSK0) && defined(OCIE0A)
case 0:
OCR0A = ocr;
timer0_toggle_count = toggle_count;
bitWrite(TIMSK0, OCIE0A, 1);
break;
#endif
case 1:
#if defined(OCR1A) && defined(TIMSK1) && defined(OCIE1A)
OCR1A = ocr;
timer1_toggle_count = toggle_count;
bitWrite(TIMSK1, OCIE1A, 1);
#elif defined(OCR1A) && defined(TIMSK) && defined(OCIE1A)
// this combination is for at least the ATmega32
OCR1A = ocr;
timer1_toggle_count = toggle_count;
bitWrite(TIMSK, OCIE1A, 1);
#endif
break;
#if defined(OCR2A) && defined(TIMSK2) && defined(OCIE2A)
case 2:
OCR2A = ocr;
timer2_toggle_count = toggle_count;
bitWrite(TIMSK2, OCIE2A, 1);
break;
#endif
#if defined(TIMSK3)
case 3:
OCR3A = ocr;
timer3_toggle_count = toggle_count;
bitWrite(TIMSK3, OCIE3A, 1);
break;
#endif
#if defined(TIMSK4)
case 4:
OCR4A = ocr;
timer4_toggle_count = toggle_count;
bitWrite(TIMSK4, OCIE4A, 1);
break;
#endif
#if defined(OCR5A) && defined(TIMSK5) && defined(OCIE5A)
case 5:
OCR5A = ocr;
timer5_toggle_count = toggle_count;
bitWrite(TIMSK5, OCIE5A, 1);
break;
#endif
#if defined(TC0) && defined(TC1) && defined(TC2)
case 6:
ocr = VARIANT_MCK / 256 / frequency;
TC_Stop(TC1, 0);
TC_SetRC(TC1, 0, ocr);
TC_Start(TC1, 0);
timer6_toggle_count = toggle_count;
break;
#endif
}
}
}
void noTone(uint32_t ulPin)
{
TC_Stop(chTC, chNo); // stop timer
digitalWrite(ulPin,LOW); // no signal on pin
}
void DACClass::end() {
TC_Stop(TC0, 1);
NVIC_DisableIRQ(isrId);
dacc_disable_channel(dac, 0);
dacc_disable_channel(dac, 1);
}
/*----------------------------------------------------------------------------
* Handles interrupts coming from USART
*----------------------------------------------------------------------------*/
void USART_Handler(void)
{
uint32_t status;
unsigned short serialState;
status = BASE_USART->US_CSR;
status &= BASE_USART->US_IMR;
/* If USB device is not configured, do nothing */
if (!isSerialPortON) {
BASE_USART->US_IDR = 0xFFFFFFFF;
return;
}
/* Buffer has been read successfully */
if ((status & US_CSR_ENDRX) != 0) {
/* Disable timer */
TC_Stop(TC0, 0);
/* Send buffer through the USB */
while (CDCDSerial_Write(usartBuffers[usartCurrentBuffer],
DATABUFFERSIZE, 0, 0) != USBD_STATUS_SUCCESS);
/* Restart read on buffer */
USART_ReadBuffer(BASE_USART,
usartBuffers[usartCurrentBuffer],
DATABUFFERSIZE);
usartCurrentBuffer = 1 - usartCurrentBuffer;
/* Restart timer */
TC_Start(TC0, 0);
}
/* Buffer has been sent */
if ((status & US_IER_TXBUFE) != 0) {
/* Restart USB read */
CDCDSerial_Read(usbSerialBuffer0,
DATABUFFERSIZE,
(TransferCallback) UsbDataReceived,
0);
BASE_USART->US_IDR = US_IER_TXBUFE;
}
/* Errors */
serialState = CDCDSerial_GetSerialState();
/* Overrun */
if ((status & US_CSR_OVRE) != 0) {
TRACE_WARNING( "USART1_IrqHandler: Overrun\n\r");
serialState |= CDCSerialState_OVERRUN;
}
/* Framing error */
if ((status & US_CSR_FRAME) != 0) {
TRACE_WARNING( "USART1_IrqHandler: Framing error\n\r");
serialState |= CDCSerialState_FRAMING;
}
CDCDSerial_SetSerialState(serialState);
}