mirror of https://github.com/noisymime/Arduino.git
Modifying basic functions (digital and analog, read and write) to use register-based ifdefs, not cpu-based.
http://code.google.com/p/arduino/issues/detail?id=307 http://code.google.com/p/arduino/issues/detail?id=316 http://code.google.com/p/arduino/issues/detail?id=323 http://code.google.com/p/arduino/issues/detail?id=324
This commit is contained in:
David A. Mellis
parent
b0888a34b5
commit
b0bc52d7d5
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@ -80,7 +80,14 @@ unsigned long micros() {
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cli();
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m = timer0_overflow_count;
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#if defined(TCNT0)
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t = TCNT0;
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#elif defined(TCNT0L)
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t = TCNT0L;
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#else
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#error TIMER 0 not defined
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#endif
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#ifdef TIFR0
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if ((TIFR0 & _BV(TOV0)) && (t < 255))
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@ -166,62 +173,99 @@ void init()
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// on the ATmega168, timer 0 is also used for fast hardware pwm
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// (using phase-correct PWM would mean that timer 0 overflowed half as often
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// resulting in different millis() behavior on the ATmega8 and ATmega168)
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#if !defined(__AVR_ATmega8__)
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#if defined(TCCR0A) && defined(WGM01)
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sbi(TCCR0A, WGM01);
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sbi(TCCR0A, WGM00);
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#endif
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// set timer 0 prescale factor to 64
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#if defined(__AVR_ATmega8__)
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#if defined(__AVR_ATmega128__)
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// CPU specific: different values for the ATmega128
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sbi(TCCR0, CS02);
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#elif defined(TCCR0) && defined(CS01) && defined(CS00)
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// this combination is for the standard atmega8
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sbi(TCCR0, CS01);
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sbi(TCCR0, CS00);
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#else
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#elif defined(TCCR0B) && defined(CS01) && defined(CS00)
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// this combination is for the standard 168/328/1280/2560
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sbi(TCCR0B, CS01);
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sbi(TCCR0B, CS00);
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#endif
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// enable timer 0 overflow interrupt
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#if defined(__AVR_ATmega8__)
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sbi(TIMSK, TOIE0);
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#elif defined(TCCR0A) && defined(CS01) && defined(CS00)
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// this combination is for the __AVR_ATmega645__ series
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sbi(TCCR0A, CS01);
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sbi(TCCR0A, CS00);
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#else
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#error Timer 0 prescale factor 64 not set correctly
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#endif
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// enable timer 0 overflow interrupt
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#if defined(TIMSK) && defined(TOIE0)
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sbi(TIMSK, TOIE0);
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#elif defined(TIMSK0) && defined(TOIE0)
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sbi(TIMSK0, TOIE0);
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#else
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#error Timer 0 overflow interrupt not set correctly
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#endif
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// timers 1 and 2 are used for phase-correct hardware pwm
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// this is better for motors as it ensures an even waveform
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// note, however, that fast pwm mode can achieve a frequency of up
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// 8 MHz (with a 16 MHz clock) at 50% duty cycle
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TCCR1B = 0;
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TCCR1B = 0;
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// set timer 1 prescale factor to 64
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#if defined(TCCR1B) && defined(CS11) && defined(CS10)
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sbi(TCCR1B, CS11);
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sbi(TCCR1B, CS10);
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#elif defined(TCCR1) && defined(CS11) && defined(CS10)
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sbi(TCCR1, CS11);
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sbi(TCCR1, CS10);
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#endif
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// put timer 1 in 8-bit phase correct pwm mode
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#if defined(TCCR1A) && defined(WGM10)
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sbi(TCCR1A, WGM10);
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#elif defined(TCCR1)
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#warning this needs to be finished
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#endif
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// set timer 2 prescale factor to 64
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#if defined(__AVR_ATmega8__)
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#if defined(TCCR2) && defined(CS22)
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sbi(TCCR2, CS22);
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#else
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#elif defined(TCCR2B) && defined(CS22)
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sbi(TCCR2B, CS22);
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#endif
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// configure timer 2 for phase correct pwm (8-bit)
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#if defined(__AVR_ATmega8__)
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sbi(TCCR2, WGM20);
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#else
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#warning Timer 2 not finished (may not be present on this CPU)
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#endif
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// configure timer 2 for phase correct pwm (8-bit)
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#if defined(TCCR2) && defined(WGM20)
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sbi(TCCR2, WGM20);
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#elif defined(TCCR2A) && defined(WGM20)
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sbi(TCCR2A, WGM20);
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#else
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#warning Timer 2 not finished (may not be present on this CPU)
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#endif
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#if defined(__AVR_ATmega1280__) || defined(__AVR_ATmega2560__)
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// set timer 3, 4, 5 prescale factor to 64
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sbi(TCCR3B, CS31); sbi(TCCR3B, CS30);
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sbi(TCCR4B, CS41); sbi(TCCR4B, CS40);
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sbi(TCCR5B, CS51); sbi(TCCR5B, CS50);
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// put timer 3, 4, 5 in 8-bit phase correct pwm mode
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sbi(TCCR3A, WGM30);
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sbi(TCCR4A, WGM40);
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sbi(TCCR5A, WGM50);
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#if defined(TCCR3B) && defined(CS31) && defined(WGM30)
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sbi(TCCR3B, CS31); // set timer 3 prescale factor to 64
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sbi(TCCR3B, CS30);
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sbi(TCCR3A, WGM30); // put timer 3 in 8-bit phase correct pwm mode
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#endif
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#if defined(TCCR4B) && defined(CS41) && defined(WGM40)
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sbi(TCCR4B, CS41); // set timer 4 prescale factor to 64
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sbi(TCCR4B, CS40);
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sbi(TCCR4A, WGM40); // put timer 4 in 8-bit phase correct pwm mode
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#endif
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#if defined(TCCR5B) && defined(CS51) && defined(WGM50)
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sbi(TCCR5B, CS51); // set timer 5 prescale factor to 64
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sbi(TCCR5B, CS50);
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sbi(TCCR5A, WGM50); // put timer 5 in 8-bit phase correct pwm mode
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#endif
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#if defined(ADCSRA)
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// set a2d prescale factor to 128
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// 16 MHz / 128 = 125 KHz, inside the desired 50-200 KHz range.
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// XXX: this will not work properly for other clock speeds, and
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@ -232,13 +276,14 @@ void init()
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// enable a2d conversions
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sbi(ADCSRA, ADEN);
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#endif
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// the bootloader connects pins 0 and 1 to the USART; disconnect them
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// here so they can be used as normal digital i/o; they will be
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// reconnected in Serial.begin()
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#if defined(__AVR_ATmega8__)
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#if defined(UCSRB)
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UCSRB = 0;
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#else
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#elif defined(UCSR0B)
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UCSR0B = 0;
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#endif
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}
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}
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@ -85,8 +85,8 @@ extern "C"{
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#define noInterrupts() cli()
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#define clockCyclesPerMicrosecond() ( F_CPU / 1000000L )
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#define clockCyclesToMicroseconds(a) ( (a) / clockCyclesPerMicrosecond() )
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#define microsecondsToClockCycles(a) ( (a) * clockCyclesPerMicrosecond() )
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#define clockCyclesToMicroseconds(a) ( ((a) * 1000L) / (F_CPU / 1000L) )
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#define microsecondsToClockCycles(a) ( ((a) * (F_CPU / 1000L)) / 1000L )
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#define lowByte(w) ((uint8_t) ((w) & 0xff))
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#define highByte(w) ((uint8_t) ((w) >> 8))
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@ -19,6 +19,8 @@
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Free Software Foundation, Inc., 59 Temple Place, Suite 330,
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Boston, MA 02111-1307 USA
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Modified 28 September 2010 by Mark Sproul
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$Id: wiring.c 248 2007-02-03 15:36:30Z mellis $
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*/
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@ -41,22 +43,27 @@ int analogRead(uint8_t pin)
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#if defined(__AVR_ATmega1280__) || defined(__AVR_ATmega2560__)
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if (pin >= 54) pin -= 54; // allow for channel or pin numbers
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#else
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if (pin >= 14) pin -= 14; // allow for channel or pin numbers
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#endif
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#if defined(ADCSRB) && defined(MUX5)
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// the MUX5 bit of ADCSRB selects whether we're reading from channels
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// 0 to 7 (MUX5 low) or 8 to 15 (MUX5 high).
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ADCSRB = (ADCSRB & ~(1 << MUX5)) | (((pin >> 3) & 0x01) << MUX5);
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#else
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if (pin >= 14) pin -= 14; // allow for channel or pin numbers
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#endif
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// set the analog reference (high two bits of ADMUX) and select the
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// channel (low 4 bits). this also sets ADLAR (left-adjust result)
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// to 0 (the default).
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#if defined(ADMUX)
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ADMUX = (analog_reference << 6) | (pin & 0x07);
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#endif
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// without a delay, we seem to read from the wrong channel
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//delay(1);
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#if defined(ADCSRA) && defined(ADCL)
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// start the conversion
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sbi(ADCSRA, ADSC);
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@ -67,8 +74,13 @@ int analogRead(uint8_t pin)
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// and ADCH until ADCH is read. reading ADCL second would
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// cause the results of each conversion to be discarded,
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// as ADCL and ADCH would be locked when it completed.
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low = ADCL;
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low = ADCL;
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high = ADCH;
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#else
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// we dont have an ADC, return 0
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low = 0;
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high = 0;
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#endif
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// combine the two bytes
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return (high << 8) | low;
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@ -86,98 +98,162 @@ void analogWrite(uint8_t pin, int val)
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// for consistenty with Wiring, which doesn't require a pinMode
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// call for the analog output pins.
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pinMode(pin, OUTPUT);
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if (digitalPinToTimer(pin) == TIMER1A) {
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// connect pwm to pin on timer 1, channel A
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sbi(TCCR1A, COM1A1);
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// set pwm duty
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OCR1A = val;
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} else if (digitalPinToTimer(pin) == TIMER1B) {
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// connect pwm to pin on timer 1, channel B
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sbi(TCCR1A, COM1B1);
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// set pwm duty
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OCR1B = val;
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#if defined(__AVR_ATmega8__)
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} else if (digitalPinToTimer(pin) == TIMER2) {
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// connect pwm to pin on timer 2, channel B
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sbi(TCCR2, COM21);
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// set pwm duty
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OCR2 = val;
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#else
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} else if (digitalPinToTimer(pin) == TIMER0A) {
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if (val == 0) {
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digitalWrite(pin, LOW);
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} else {
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// connect pwm to pin on timer 0, channel A
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sbi(TCCR0A, COM0A1);
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// set pwm duty
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OCR0A = val;
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}
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} else if (digitalPinToTimer(pin) == TIMER0B) {
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if (val == 0) {
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digitalWrite(pin, LOW);
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} else {
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// connect pwm to pin on timer 0, channel B
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sbi(TCCR0A, COM0B1);
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// set pwm duty
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OCR0B = val;
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}
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} else if (digitalPinToTimer(pin) == TIMER2A) {
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// connect pwm to pin on timer 2, channel A
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sbi(TCCR2A, COM2A1);
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// set pwm duty
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OCR2A = val;
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} else if (digitalPinToTimer(pin) == TIMER2B) {
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// connect pwm to pin on timer 2, channel B
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sbi(TCCR2A, COM2B1);
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// set pwm duty
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OCR2B = val;
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#endif
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#if defined(__AVR_ATmega1280__) || defined(__AVR_ATmega2560__)
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// XXX: need to handle other timers here
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} else if (digitalPinToTimer(pin) == TIMER3A) {
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// connect pwm to pin on timer 3, channel A
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sbi(TCCR3A, COM3A1);
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// set pwm duty
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OCR3A = val;
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} else if (digitalPinToTimer(pin) == TIMER3B) {
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// connect pwm to pin on timer 3, channel B
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sbi(TCCR3A, COM3B1);
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// set pwm duty
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OCR3B = val;
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} else if (digitalPinToTimer(pin) == TIMER3C) {
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// connect pwm to pin on timer 3, channel C
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sbi(TCCR3A, COM3C1);
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// set pwm duty
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OCR3C = val;
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} else if (digitalPinToTimer(pin) == TIMER4A) {
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// connect pwm to pin on timer 4, channel A
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sbi(TCCR4A, COM4A1);
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// set pwm duty
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OCR4A = val;
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} else if (digitalPinToTimer(pin) == TIMER4B) {
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// connect pwm to pin on timer 4, channel B
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sbi(TCCR4A, COM4B1);
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// set pwm duty
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OCR4B = val;
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} else if (digitalPinToTimer(pin) == TIMER4C) {
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// connect pwm to pin on timer 4, channel C
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sbi(TCCR4A, COM4C1);
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// set pwm duty
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OCR4C = val;
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} else if (digitalPinToTimer(pin) == TIMER5A) {
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// connect pwm to pin on timer 5, channel A
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sbi(TCCR5A, COM5A1);
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// set pwm duty
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OCR5A = val;
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} else if (digitalPinToTimer(pin) == TIMER5B) {
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// connect pwm to pin on timer 5, channel B
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sbi(TCCR5A, COM5B1);
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// set pwm duty
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OCR5B = val;
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#endif
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} else if (val < 128)
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if (val == 0)
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{
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digitalWrite(pin, LOW);
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else
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}
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else if (val == 255)
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{
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digitalWrite(pin, HIGH);
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}
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else
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{
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switch(digitalPinToTimer(pin))
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{
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// XXX fix needed for atmega8
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#if defined(TCCR0) && defined(COM00) && !defined(__AVR_ATmega8__)
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case TIMER0A:
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// connect pwm to pin on timer 0
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sbi(TCCR0, COM00);
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OCR0 = val; // set pwm duty
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break;
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#endif
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#if defined(TCCR0A) && defined(COM0A1)
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case TIMER0A:
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// connect pwm to pin on timer 0, channel A
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sbi(TCCR0A, COM0A1);
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OCR0A = val; // set pwm duty
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break;
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#endif
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#if defined(TCCR0A) && defined(COM0B1)
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case TIMER0B:
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// connect pwm to pin on timer 0, channel B
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sbi(TCCR0A, COM0B1);
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OCR0B = val; // set pwm duty
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break;
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#endif
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#if defined(TCCR1A) && defined(COM1A1)
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case TIMER1A:
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// connect pwm to pin on timer 1, channel A
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sbi(TCCR1A, COM1A1);
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OCR1A = val; // set pwm duty
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break;
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#endif
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#if defined(TCCR1A) && defined(COM1B1)
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case TIMER1B:
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// connect pwm to pin on timer 1, channel B
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sbi(TCCR1A, COM1B1);
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OCR1B = val; // set pwm duty
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break;
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#endif
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#if defined(TCCR2) && defined(COM21)
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case TIMER2:
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// connect pwm to pin on timer 2
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sbi(TCCR2, COM21);
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OCR2 = val; // set pwm duty
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break;
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#endif
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#if defined(TCCR2A) && defined(COM2A1)
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case TIMER2A:
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// connect pwm to pin on timer 2, channel A
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sbi(TCCR2A, COM2A1);
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OCR2A = val; // set pwm duty
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break;
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#endif
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#if defined(TCCR2A) && defined(COM2B1)
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case TIMER2B:
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// connect pwm to pin on timer 2, channel B
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sbi(TCCR2A, COM2B1);
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OCR2B = val; // set pwm duty
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break;
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#endif
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#if defined(TCCR3A) && defined(COM3A1)
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case TIMER3A:
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// connect pwm to pin on timer 3, channel A
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sbi(TCCR3A, COM3A1);
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OCR3A = val; // set pwm duty
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break;
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#endif
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#if defined(TCCR3A) && defined(COM3B1)
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case TIMER3B:
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// connect pwm to pin on timer 3, channel B
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sbi(TCCR3A, COM3B1);
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OCR3B = val; // set pwm duty
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break;
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#endif
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#if defined(TCCR3A) && defined(COM3C1)
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case TIMER3C:
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// connect pwm to pin on timer 3, channel C
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sbi(TCCR3A, COM3C1);
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OCR3C = val; // set pwm duty
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break;
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#endif
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#if defined(TCCR4A) && defined(COM4A1)
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case TIMER4A:
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// connect pwm to pin on timer 4, channel A
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sbi(TCCR4A, COM4A1);
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OCR4A = val; // set pwm duty
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break;
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#endif
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#if defined(TCCR4A) && defined(COM4B1)
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case TIMER4B:
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// connect pwm to pin on timer 4, channel B
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sbi(TCCR4A, COM4B1);
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OCR4B = val; // set pwm duty
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break;
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#endif
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#if defined(TCCR4A) && defined(COM4C1)
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case TIMER4C:
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// connect pwm to pin on timer 4, channel C
|
||||
sbi(TCCR4A, COM4C1);
|
||||
OCR4C = val; // set pwm duty
|
||||
break;
|
||||
#endif
|
||||
|
||||
#if defined(TCCR5A) && defined(COM5A1)
|
||||
case TIMER5A:
|
||||
// connect pwm to pin on timer 5, channel A
|
||||
sbi(TCCR5A, COM5A1);
|
||||
OCR5A = val; // set pwm duty
|
||||
break;
|
||||
#endif
|
||||
|
||||
#if defined(TCCR5A) && defined(COM5B1)
|
||||
case TIMER5B:
|
||||
// connect pwm to pin on timer 5, channel B
|
||||
sbi(TCCR5A, COM5B1);
|
||||
OCR5B = val; // set pwm duty
|
||||
break;
|
||||
#endif
|
||||
|
||||
#if defined(TCCR5A) && defined(COM5C1)
|
||||
case TIMER5C:
|
||||
// connect pwm to pin on timer 5, channel C
|
||||
sbi(TCCR5A, COM5C1);
|
||||
OCR5C = val; // set pwm duty
|
||||
break;
|
||||
#endif
|
||||
|
||||
case NOT_ON_TIMER:
|
||||
default:
|
||||
if (val < 128) {
|
||||
digitalWrite(pin, LOW);
|
||||
} else {
|
||||
digitalWrite(pin, HIGH);
|
||||
}
|
||||
}
|
||||
}
|
||||
}
|
||||
|
|
|
|||
|
|
@ -19,6 +19,8 @@
|
|||
Free Software Foundation, Inc., 59 Temple Place, Suite 330,
|
||||
Boston, MA 02111-1307 USA
|
||||
|
||||
Modified 28 September 2010 by Mark Sproul
|
||||
|
||||
$Id: wiring.c 248 2007-02-03 15:36:30Z mellis $
|
||||
*/
|
||||
|
||||
|
|
@ -56,32 +58,67 @@ void pinMode(uint8_t pin, uint8_t mode)
|
|||
// But shouldn't this be moved into pinMode? Seems silly to check and do on
|
||||
// each digitalread or write.
|
||||
//
|
||||
static inline void turnOffPWM(uint8_t timer) __attribute__ ((always_inline));
|
||||
static inline void turnOffPWM(uint8_t timer)
|
||||
// Mark Sproul:
|
||||
// - Removed inline. Save 170 bytes on atmega1280
|
||||
// - changed to a switch statment; added 32 bytes but much easier to read and maintain.
|
||||
// - Added more #ifdefs, now compiles for atmega645
|
||||
//
|
||||
//static inline void turnOffPWM(uint8_t timer) __attribute__ ((always_inline));
|
||||
//static inline void turnOffPWM(uint8_t timer)
|
||||
static void turnOffPWM(uint8_t timer)
|
||||
{
|
||||
if (timer == TIMER1A) cbi(TCCR1A, COM1A1);
|
||||
if (timer == TIMER1B) cbi(TCCR1A, COM1B1);
|
||||
switch (timer)
|
||||
{
|
||||
#if defined(TCCR1A) && defined(COM1A1)
|
||||
case TIMER1A: cbi(TCCR1A, COM1A1); break;
|
||||
#endif
|
||||
#if defined(TCCR1A) && defined(COM1B1)
|
||||
case TIMER1B: cbi(TCCR1A, COM1B1); break;
|
||||
#endif
|
||||
|
||||
#if defined(TCCR2) && defined(COM21)
|
||||
case TIMER2: cbi(TCCR2, COM21); break;
|
||||
#endif
|
||||
|
||||
#if defined(TCCR0A) && defined(COM0A1)
|
||||
case TIMER0A: cbi(TCCR0A, COM0A1); break;
|
||||
#endif
|
||||
|
||||
#if defined(TIMER0B) && defined(COM0B1)
|
||||
case TIMER0B: cbi(TCCR0A, COM0B1); break;
|
||||
#endif
|
||||
#if defined(TCCR2A) && defined(COM2A1)
|
||||
case TIMER2A: cbi(TCCR2A, COM2A1); break;
|
||||
#endif
|
||||
#if defined(TCCR2A) && defined(COM2B1)
|
||||
case TIMER2B: cbi(TCCR2A, COM2B1); break;
|
||||
#endif
|
||||
|
||||
#if defined(TCCR3A) && defined(COM3A1)
|
||||
case TIMER3A: cbi(TCCR3A, COM3A1); break;
|
||||
#endif
|
||||
#if defined(TCCR3A) && defined(COM3B1)
|
||||
case TIMER3B: cbi(TCCR3A, COM3B1); break;
|
||||
#endif
|
||||
#if defined(TCCR3A) && defined(COM3C1)
|
||||
case TIMER3C: cbi(TCCR3A, COM3C1); break;
|
||||
#endif
|
||||
|
||||
#if defined(__AVR_ATmega8__)
|
||||
if (timer == TIMER2) cbi(TCCR2, COM21);
|
||||
#else
|
||||
if (timer == TIMER0A) cbi(TCCR0A, COM0A1);
|
||||
if (timer == TIMER0B) cbi(TCCR0A, COM0B1);
|
||||
if (timer == TIMER2A) cbi(TCCR2A, COM2A1);
|
||||
if (timer == TIMER2B) cbi(TCCR2A, COM2B1);
|
||||
#endif
|
||||
|
||||
#if defined(__AVR_ATmega1280__) || defined(__AVR_ATmega2560__)
|
||||
if (timer == TIMER3A) cbi(TCCR3A, COM3A1);
|
||||
if (timer == TIMER3B) cbi(TCCR3A, COM3B1);
|
||||
if (timer == TIMER3C) cbi(TCCR3A, COM3C1);
|
||||
if (timer == TIMER4A) cbi(TCCR4A, COM4A1);
|
||||
if (timer == TIMER4B) cbi(TCCR4A, COM4B1);
|
||||
if (timer == TIMER4C) cbi(TCCR4A, COM4C1);
|
||||
if (timer == TIMER5A) cbi(TCCR5A, COM5A1);
|
||||
if (timer == TIMER5B) cbi(TCCR5A, COM5B1);
|
||||
if (timer == TIMER5C) cbi(TCCR5A, COM5C1);
|
||||
#endif
|
||||
#if defined(TCCR4A) && defined(COM4A1)
|
||||
case TIMER4A: cbi(TCCR4A, COM4A1); break;
|
||||
#endif
|
||||
#if defined(TCCR4A) && defined(COM4B1)
|
||||
case TIMER4B: cbi(TCCR4A, COM4B1); break;
|
||||
#endif
|
||||
#if defined(TCCR4A) && defined(COM4C1)
|
||||
case TIMER4C: cbi(TCCR4A, COM4C1); break;
|
||||
#endif
|
||||
#if defined(TCCR5A)
|
||||
case TIMER5A: cbi(TCCR5A, COM5A1); break;
|
||||
case TIMER5B: cbi(TCCR5A, COM5B1); break;
|
||||
case TIMER5C: cbi(TCCR5A, COM5C1); break;
|
||||
#endif
|
||||
}
|
||||
}
|
||||
|
||||
void digitalWrite(uint8_t pin, uint8_t val)
|
||||
|
|
|
|||
Loading…
Reference in New Issue