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uClock
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release 0.8.1. clock tunnings for better PC/Ableton sync

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pull/7/head 0.8.1
midilab 4 years ago
parent 13f14b4755
commit ed4755e5bd
3 changed files with 28 additions and 33 deletions
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  1. 4
      library.properties
  2. 49
      src/uClock.cpp
  3. 8
      src/uClock.h

4
library.properties
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@ -1,10 +1,10 @@
name=uClock name=uClock
version=0.8 version=0.8.1
author=Romulo Silva <contact@midilab.co>, Manuel Odendahl <wesen@ruinwesen.com> author=Romulo Silva <contact@midilab.co>, Manuel Odendahl <wesen@ruinwesen.com>
maintainer=Romulo Silva <contact@midilab.co> maintainer=Romulo Silva <contact@midilab.co>
sentence=BPM clock generator for Arduino sentence=BPM clock generator for Arduino
paragraph=A Library to implement BPM clock tick calls using hardware timer1 interruption. Tested on ATmega168/328, ATmega16u4/32u4 and ATmega2560. paragraph=A Library to implement BPM clock tick calls using hardware timer1 interruption. Tested on ATmega168/328, ATmega16u4/32u4 and ATmega2560.
category=Uncategorized category=Music
url=https://github.com/midilab/uClock url=https://github.com/midilab/uClock
architectures=avr architectures=avr
includes=uClock.h includes=uClock.h

49
src/uClock.cpp
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@ -3,10 +3,10 @@
* Project BPM clock generator for Arduino * Project BPM clock generator for Arduino
* @brief A Library to implement BPM clock tick calls using hardware timer1 interruption. Tested on ATmega168/328, ATmega16u4/32u4 and ATmega2560. * @brief A Library to implement BPM clock tick calls using hardware timer1 interruption. Tested on ATmega168/328, ATmega16u4/32u4 and ATmega2560.
* Derived work from mididuino MidiClock class. (c) 2008 - 2011 - Manuel Odendahl - wesen@ruinwesen.com * Derived work from mididuino MidiClock class. (c) 2008 - 2011 - Manuel Odendahl - wesen@ruinwesen.com
* @version 0.8 * @version 0.8.1
* @author Romulo Silva * @author Romulo Silva
* @date 10/06/17 * @date 08/21/2020
* @license MIT - (c) 2017 - Romulo Silva - contact@midilab.co * @license MIT - (c) 2020 - Romulo Silva - contact@midilab.co
* *
* Permission is hereby granted, free of charge, to any person obtaining a * Permission is hereby granted, free of charge, to any person obtaining a
* copy of this software and associated documentation files (the "Software"), * copy of this software and associated documentation files (the "Software"),
@ -27,7 +27,7 @@
* DEALINGS IN THE SOFTWARE. * DEALINGS IN THE SOFTWARE.
*/ */
// TODO: use decimal for timming prescision: 120.10, 120.20 // TODO: use float for decimal timming precision: 120.10, 120.20
// each 0.1 bpm equals 15.625 intervals on 16Mhz clock // each 0.1 bpm equals 15.625 intervals on 16Mhz clock
// each 1 bpm equals 156.250 intervals on 16Mhz clock // each 1 bpm equals 156.250 intervals on 16Mhz clock
@ -35,6 +35,8 @@
namespace umodular { namespace clock { namespace umodular { namespace clock {
uint8_t _tmpSREG;
static inline uint32_t phase_mult(uint32_t val) static inline uint32_t phase_mult(uint32_t val)
{ {
return (val * PHASE_FACTOR) >> 8; return (val * PHASE_FACTOR) >> 8;
@ -51,8 +53,8 @@ static inline uint16_t clock_diff(uint16_t old_clock, uint16_t new_clock)
uClockClass::uClockClass() uClockClass::uClockClass()
{ {
pll_x = 220;
mode = INTERNAL_CLOCK; mode = INTERNAL_CLOCK;
state = PAUSED;
resetCounters(); resetCounters();
setTempo(120); setTempo(120);
@ -65,29 +67,27 @@ uClockClass::uClockClass()
void uClockClass::init() void uClockClass::init()
{ {
uint8_t tmpSREG; start_timer = 0;
state = PAUSED;
// //
// Configure timers and prescale // Configure timers and prescale
// Timmer1: ATMega128, ATMega328, AtMega16U4 and AtMega32U4 // Timmer1: ATMega128, ATMega328, AtMega16U4 and AtMega32U4
tmpSREG = SREG; _tmpSREG = SREG;
cli(); cli();
// Waveform Generation Mode (WGM) 16-bit timer settings // Waveform Generation Mode (WGM) 16-bit timer settings
// WGM10, WGM12 // (WGM10, WGM12) Mode 5: Fast Pulse Width Modulation (PWM), 8-bit
// Mode 5: Fast Pulse Width Modulation (PWM), 8-bit
// Clock Speed Selection // Clock Speed Selection
// CS10: Clock (No prescaling) // CS10: Clock (No prescaling)
TCCR1A = _BV(WGM10); TCCR1A = _BV(WGM10);
TCCR1B = _BV(CS10) | _BV(WGM12); // every cycle TCCR1B = _BV(CS10) | _BV(WGM12);
TIMSK1 |= _BV(TOIE1); TIMSK1 |= _BV(TOIE1);
SREG = tmpSREG; SREG = _tmpSREG;
} }
void uClockClass::start() void uClockClass::start()
{ {
start_timer = millis();
resetCounters(); resetCounters();
start_timer = millis();
if (onClockStartCallback) { if (onClockStartCallback) {
onClockStartCallback(); onClockStartCallback();
@ -100,16 +100,13 @@ void uClockClass::start()
} }
} }
void uClockClass::stop() void uClockClass::stop()
{ {
resetCounters(); resetCounters();
start_timer = 0;
if (onClockStopCallback) { if (onClockStopCallback) {
onClockStopCallback(); onClockStopCallback();
} }
//state = PAUSED;
} }
void uClockClass::pause() void uClockClass::pause()
@ -123,26 +120,26 @@ void uClockClass::pause()
} }
} }
void uClockClass::setTempo(uint16_t _tempo) void uClockClass::setTempo(uint16_t bpm)
{ {
if (mode == EXTERNAL_CLOCK) { if (mode == EXTERNAL_CLOCK) {
return; return;
} }
if (tempo == _tempo) { if (tempo == bpm) {
return; return;
} }
if (_tempo > 300 || _tempo == 0) { if (bpm > 300 || bpm == 0) {
return; return;
} }
uint8_t tmpSREG = SREG; _tmpSREG = SREG;
cli(); cli();
tempo = _tempo; tempo = bpm;
//interval = 62500 / (tempo * 24 / 60) - 4; //interval = 62500 / (tempo * 24 / 60) - 4;
interval = (uint16_t)(156250 / tempo) - 4; interval = (uint16_t)(156250 / tempo) - 4;
SREG = tmpSREG; SREG = _tmpSREG;
} }
uint16_t uClockClass::getTempo() uint16_t uClockClass::getTempo()
@ -177,8 +174,6 @@ void uClockClass::resetCounters()
mod6_counter = 0; mod6_counter = 0;
indiv96th_counter = 0; indiv96th_counter = 0;
inmod6_counter = 0; inmod6_counter = 0;
pll_x = 220;
start_timer = 0;
} }
// TODO: Tap stuff // TODO: Tap stuff

8
src/uClock.h
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@ -3,10 +3,10 @@
* Project BPM clock generator for Arduino * Project BPM clock generator for Arduino
* @brief A Library to implement BPM clock tick calls using hardware timer1 interruption. Tested on ATmega168/328, ATmega16u4/32u4 and ATmega2560. * @brief A Library to implement BPM clock tick calls using hardware timer1 interruption. Tested on ATmega168/328, ATmega16u4/32u4 and ATmega2560.
* Derived work from mididuino MidiClock class. (c) 2008 - 2011 - Manuel Odendahl - wesen@ruinwesen.com * Derived work from mididuino MidiClock class. (c) 2008 - 2011 - Manuel Odendahl - wesen@ruinwesen.com
* @version 0.8 * @version 0.8.1
* @author Romulo Silva * @author Romulo Silva
* @date 10/06/17 * @date 08/21/2020
* @license MIT - (c) 2017 - Romulo Silva - contact@midilab.co * @license MIT - (c) 2020 - Romulo Silva - contact@midilab.co
* *
* Permission is hereby granted, free of charge, to any person obtaining a * Permission is hereby granted, free of charge, to any person obtaining a
* copy of this software and associated documentation files (the "Software"), * copy of this software and associated documentation files (the "Software"),
@ -112,7 +112,7 @@ class uClockClass {
void start(); void start();
void stop(); void stop();
void pause(); void pause();
void setTempo(uint16_t tempo); void setTempo(uint16_t bpm);
uint16_t getTempo(); uint16_t getTempo();
// external timming control // external timming control

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