d-a-v
/
OneWireArduinoSlaveATTINY85
forked from IanF/OneWireArduinoSlaveATTINY85
1
0
Fork 0
Code Issues Pull Requests Releases Wiki Activity
Browse Source

Timer1 library from https://github.com/PaulStoffregen/TimerOne aaeb4a36f5f23e99e6011bea77cf76abb912e13a

timer1
Youen Toupin 8 years ago
parent
c21e3ea835
commit
18d9e257d2
3 changed files with 557 additions and 0 deletions
Whitespace
Show all changes Ignore whitespace when comparing lines Ignore changes in amount of whitespace Ignore changes in whitespace at EOL
Split View
Diff Options
Show Stats Download Patch File Download Diff File
  1. 49
      TimerOne.cpp
  2. 355
      TimerOne.h
  3. 153
      config/known_16bit_timers.h

49
TimerOne.cpp
Unescape View File

@ -0,0 +1,49 @@
/*
* Interrupt and PWM utilities for 16 bit Timer1 on ATmega168/328
* Original code by Jesse Tane for http://labs.ideo.com August 2008
* Modified March 2009 by Jérôme Despatis and Jesse Tane for ATmega328 support
* Modified June 2009 by Michael Polli and Jesse Tane to fix a bug in setPeriod() which caused the timer to stop
* Modified Oct 2009 by Dan Clemens to work with timer1 of the ATMega1280 or Arduino Mega
* Modified April 2012 by Paul Stoffregen
* Modified again, June 2014 by Paul Stoffregen
* This version has been downloaded from https://github.com/PaulStoffregen/TimerOne (commit aaeb4a36f5f23e99e6011bea77cf76abb912e13a)
*
* This is free software. You can redistribute it and/or modify it under
* the terms of Creative Commons Attribution 3.0 United States License.
* To view a copy of this license, visit http://creativecommons.org/licenses/by/3.0/us/
* or send a letter to Creative Commons, 171 Second Street, Suite 300, San Francisco, California, 94105, USA.
*
*/
#include "TimerOne.h"
TimerOne Timer1; // preinstatiate
unsigned short TimerOne::pwmPeriod = 0;
unsigned char TimerOne::clockSelectBits = 0;
void (*TimerOne::isrCallback)() = TimerOne::isrDefaultUnused;
// interrupt service routine that wraps a user defined function supplied by attachInterrupt
#if defined(__AVR__)
ISR(TIMER1_OVF_vect)
{
Timer1.isrCallback();
}
#elif defined(__arm__) && defined(CORE_TEENSY)
void ftm1_isr(void)
{
uint32_t sc = FTM1_SC;
#ifdef KINETISL
if (sc & 0x80) FTM1_SC = sc;
#else
if (sc & 0x80) FTM1_SC = sc & 0x7F;
#endif
Timer1.isrCallback();
}
#endif
void TimerOne::isrDefaultUnused()
{
}

355
TimerOne.h
Unescape View File

@ -0,0 +1,355 @@
/*
* Interrupt and PWM utilities for 16 bit Timer1 on ATmega168/328
* Original code by Jesse Tane for http://labs.ideo.com August 2008
* Modified March 2009 by Jérôme Despatis and Jesse Tane for ATmega328 support
* Modified June 2009 by Michael Polli and Jesse Tane to fix a bug in setPeriod() which caused the timer to stop
* Modified April 2012 by Paul Stoffregen - portable to other AVR chips, use inline functions
* Modified again, June 2014 by Paul Stoffregen - support Teensy 3.x & even more AVR chips
* This version has been downloaded from https://github.com/PaulStoffregen/TimerOne (commit aaeb4a36f5f23e99e6011bea77cf76abb912e13a)
*
*
* This is free software. You can redistribute it and/or modify it under
* the terms of Creative Commons Attribution 3.0 United States License.
* To view a copy of this license, visit http://creativecommons.org/licenses/by/3.0/us/
* or send a letter to Creative Commons, 171 Second Street, Suite 300, San Francisco, California, 94105, USA.
*
*/
#ifndef TimerOne_h_
#define TimerOne_h_
#if defined(ARDUINO) && ARDUINO >= 100
#include "Arduino.h"
#else
#include "WProgram.h"
#endif
#include "config/known_16bit_timers.h"
#define TIMER1_RESOLUTION 65536UL // Timer1 is 16 bit
// Placing nearly all the code in this .h file allows the functions to be
// inlined by the compiler. In the very common case with constant values
// the compiler will perform all calculations and simply write constants
// to the hardware registers (for example, setPeriod).
class TimerOne
{
#if defined(__AVR__)
public:
//****************************
// Configuration
//****************************
void initialize(unsigned long microseconds=1000000) __attribute__((always_inline)) {
TCCR1B = _BV(WGM13); // set mode as phase and frequency correct pwm, stop the timer
TCCR1A = 0; // clear control register A
setPeriod(microseconds);
}
void setPeriod(unsigned long microseconds) __attribute__((always_inline)) {
const unsigned long cycles = (F_CPU / 2000000) * microseconds;
if (cycles < TIMER1_RESOLUTION) {
clockSelectBits = _BV(CS10);
pwmPeriod = cycles;
} else
if (cycles < TIMER1_RESOLUTION * 8) {
clockSelectBits = _BV(CS11);
pwmPeriod = cycles / 8;
} else
if (cycles < TIMER1_RESOLUTION * 64) {
clockSelectBits = _BV(CS11) | _BV(CS10);
pwmPeriod = cycles / 64;
} else
if (cycles < TIMER1_RESOLUTION * 256) {
clockSelectBits = _BV(CS12);
pwmPeriod = cycles / 256;
} else
if (cycles < TIMER1_RESOLUTION * 1024) {
clockSelectBits = _BV(CS12) | _BV(CS10);
pwmPeriod = cycles / 1024;
} else {
clockSelectBits = _BV(CS12) | _BV(CS10);
pwmPeriod = TIMER1_RESOLUTION - 1;
}
ICR1 = pwmPeriod;
TCCR1B = _BV(WGM13) | clockSelectBits;
}
//****************************
// Run Control
//****************************
void start() __attribute__((always_inline)) {
TCCR1B = 0;
TCNT1 = 0; // TODO: does this cause an undesired interrupt?
resume();
}
void stop() __attribute__((always_inline)) {
TCCR1B = _BV(WGM13);
}
void restart() __attribute__((always_inline)) {
start();
}
void resume() __attribute__((always_inline)) {
TCCR1B = _BV(WGM13) | clockSelectBits;
}
//****************************
// PWM outputs
//****************************
void setPwmDuty(char pin, unsigned int duty) __attribute__((always_inline)) {
unsigned long dutyCycle = pwmPeriod;
dutyCycle *= duty;
dutyCycle >>= 10;
if (pin == TIMER1_A_PIN) OCR1A = dutyCycle;
#ifdef TIMER1_B_PIN
else if (pin == TIMER1_B_PIN) OCR1B = dutyCycle;
#endif
#ifdef TIMER1_C_PIN
else if (pin == TIMER1_C_PIN) OCR1C = dutyCycle;
#endif
}
void pwm(char pin, unsigned int duty) __attribute__((always_inline)) {
if (pin == TIMER1_A_PIN) { pinMode(TIMER1_A_PIN, OUTPUT); TCCR1A |= _BV(COM1A1); }
#ifdef TIMER1_B_PIN
else if (pin == TIMER1_B_PIN) { pinMode(TIMER1_B_PIN, OUTPUT); TCCR1A |= _BV(COM1B1); }
#endif
#ifdef TIMER1_C_PIN
else if (pin == TIMER1_C_PIN) { pinMode(TIMER1_C_PIN, OUTPUT); TCCR1A |= _BV(COM1C1); }
#endif
setPwmDuty(pin, duty);
TCCR1B = _BV(WGM13) | clockSelectBits;
}
void pwm(char pin, unsigned int duty, unsigned long microseconds) __attribute__((always_inline)) {
if (microseconds > 0) setPeriod(microseconds);
pwm(pin, duty);
}
void disablePwm(char pin) __attribute__((always_inline)) {
if (pin == TIMER1_A_PIN) TCCR1A &= ~_BV(COM1A1);
#ifdef TIMER1_B_PIN
else if (pin == TIMER1_B_PIN) TCCR1A &= ~_BV(COM1B1);
#endif
#ifdef TIMER1_C_PIN
else if (pin == TIMER1_C_PIN) TCCR1A &= ~_BV(COM1C1);
#endif
}
//****************************
// Interrupt Function
//****************************
void attachInterrupt(void (*isr)()) __attribute__((always_inline)) {
isrCallback = isr;
TIMSK1 = _BV(TOIE1);
}
void attachInterrupt(void (*isr)(), unsigned long microseconds) __attribute__((always_inline)) {
if(microseconds > 0) setPeriod(microseconds);
attachInterrupt(isr);
}
void detachInterrupt() __attribute__((always_inline)) {
TIMSK1 = 0;
}
static void (*isrCallback)();
static void isrDefaultUnused();
private:
// properties
static unsigned short pwmPeriod;
static unsigned char clockSelectBits;
#elif defined(__arm__) && defined(CORE_TEENSY)
#if defined(KINETISK)
#define F_TIMER F_BUS
#elif defined(KINETISL)
#define F_TIMER (F_PLL/2)
#endif
public:
//****************************
// Configuration
//****************************
void initialize(unsigned long microseconds=1000000) __attribute__((always_inline)) {
setPeriod(microseconds);
}
void setPeriod(unsigned long microseconds) __attribute__((always_inline)) {
const unsigned long cycles = (F_TIMER / 2000000) * microseconds;
// A much faster if-else
// This is like a binary serch tree and no more than 3 conditions are evaluated.
// I haven't checked if this becomes significantly longer ASM than the simple ladder.
// It looks very similar to the ladder tho: same # of if's and else's
/*
// This code does not work properly in all cases :(
// https://github.com/PaulStoffregen/TimerOne/issues/17
if (cycles < TIMER1_RESOLUTION * 16) {
if (cycles < TIMER1_RESOLUTION * 4) {
if (cycles < TIMER1_RESOLUTION) {
clockSelectBits = 0;
pwmPeriod = cycles;
}else{
clockSelectBits = 1;
pwmPeriod = cycles >> 1;
}
}else{
if (cycles < TIMER1_RESOLUTION * 8) {
clockSelectBits = 3;
pwmPeriod = cycles >> 3;
}else{
clockSelectBits = 4;
pwmPeriod = cycles >> 4;
}
}
}else{
if (cycles > TIMER1_RESOLUTION * 64) {
if (cycles > TIMER1_RESOLUTION * 128) {
clockSelectBits = 7;
pwmPeriod = TIMER1_RESOLUTION - 1;
}else{
clockSelectBits = 7;
pwmPeriod = cycles >> 7;
}
}
else{
if (cycles > TIMER1_RESOLUTION * 32) {
clockSelectBits = 6;
pwmPeriod = cycles >> 6;
}else{
clockSelectBits = 5;
pwmPeriod = cycles >> 5;
}
}
}
*/
if (cycles < TIMER1_RESOLUTION) {
clockSelectBits = 0;
pwmPeriod = cycles;
} else
if (cycles < TIMER1_RESOLUTION * 2) {
clockSelectBits = 1;
pwmPeriod = cycles >> 1;
} else
if (cycles < TIMER1_RESOLUTION * 4) {
clockSelectBits = 2;
pwmPeriod = cycles >> 2;
} else
if (cycles < TIMER1_RESOLUTION * 8) {
clockSelectBits = 3;
pwmPeriod = cycles >> 3;
} else
if (cycles < TIMER1_RESOLUTION * 16) {
clockSelectBits = 4;
pwmPeriod = cycles >> 4;
} else
if (cycles < TIMER1_RESOLUTION * 32) {
clockSelectBits = 5;
pwmPeriod = cycles >> 5;
} else
if (cycles < TIMER1_RESOLUTION * 64) {
clockSelectBits = 6;
pwmPeriod = cycles >> 6;
} else
if (cycles < TIMER1_RESOLUTION * 128) {
clockSelectBits = 7;
pwmPeriod = cycles >> 7;
} else {
clockSelectBits = 7;
pwmPeriod = TIMER1_RESOLUTION - 1;
}
uint32_t sc = FTM1_SC;
FTM1_SC = 0;
FTM1_MOD = pwmPeriod;
FTM1_SC = FTM_SC_CLKS(1) | FTM_SC_CPWMS | clockSelectBits | (sc & FTM_SC_TOIE);
}
//****************************
// Run Control
//****************************
void start() __attribute__((always_inline)) {
stop();
FTM1_CNT = 0;
resume();
}
void stop() __attribute__((always_inline)) {
FTM1_SC = FTM1_SC & (FTM_SC_TOIE | FTM_SC_CPWMS | FTM_SC_PS(7));
}
void restart() __attribute__((always_inline)) {
start();
}
void resume() __attribute__((always_inline)) {
FTM1_SC = (FTM1_SC & (FTM_SC_TOIE | FTM_SC_PS(7))) | FTM_SC_CPWMS | FTM_SC_CLKS(1);
}
//****************************
// PWM outputs
//****************************
void setPwmDuty(char pin, unsigned int duty) __attribute__((always_inline)) {
unsigned long dutyCycle = pwmPeriod;
dutyCycle *= duty;
dutyCycle >>= 10;
if (pin == TIMER1_A_PIN) {
FTM1_C0V = dutyCycle;
} else if (pin == TIMER1_B_PIN) {
FTM1_C1V = dutyCycle;
}
}
void pwm(char pin, unsigned int duty) __attribute__((always_inline)) {
setPwmDuty(pin, duty);
if (pin == TIMER1_A_PIN) {
*portConfigRegister(TIMER1_A_PIN) = PORT_PCR_MUX(3) | PORT_PCR_DSE | PORT_PCR_SRE;
} else if (pin == TIMER1_B_PIN) {
*portConfigRegister(TIMER1_B_PIN) = PORT_PCR_MUX(3) | PORT_PCR_DSE | PORT_PCR_SRE;
}
}
void pwm(char pin, unsigned int duty, unsigned long microseconds) __attribute__((always_inline)) {
if (microseconds > 0) setPeriod(microseconds);
pwm(pin, duty);
}
void disablePwm(char pin) __attribute__((always_inline)) {
if (pin == TIMER1_A_PIN) {
*portConfigRegister(TIMER1_A_PIN) = 0;
} else if (pin == TIMER1_B_PIN) {
*portConfigRegister(TIMER1_B_PIN) = 0;
}
}
//****************************
// Interrupt Function
//****************************
void attachInterrupt(void (*isr)()) __attribute__((always_inline)) {
isrCallback = isr;
FTM1_SC |= FTM_SC_TOIE;
NVIC_ENABLE_IRQ(IRQ_FTM1);
}
void attachInterrupt(void (*isr)(), unsigned long microseconds) __attribute__((always_inline)) {
if(microseconds > 0) setPeriod(microseconds);
attachInterrupt(isr);
}
void detachInterrupt() __attribute__((always_inline)) {
FTM1_SC &= ~FTM_SC_TOIE;
NVIC_DISABLE_IRQ(IRQ_FTM1);
}
static void (*isrCallback)();
static void isrDefaultUnused();
private:
// properties
static unsigned short pwmPeriod;
static unsigned char clockSelectBits;
#undef F_TIMER
#endif
};
extern TimerOne Timer1;
#endif

153
config/known_16bit_timers.h
Unescape View File

@ -0,0 +1,153 @@
#ifndef known_16bit_timers_header_
#define known_16bit_timers_header_
// Wiring-S
//
#if defined(__AVR_ATmega644P__) && defined(WIRING)
#define TIMER1_A_PIN 5
#define TIMER1_B_PIN 4
#define TIMER1_ICP_PIN 6
// Teensy 2.0
//
#elif defined(__AVR_ATmega32U4__) && defined(CORE_TEENSY)
#define TIMER1_A_PIN 14
#define TIMER1_B_PIN 15
#define TIMER1_C_PIN 4
#define TIMER1_ICP_PIN 22
#define TIMER1_CLK_PIN 11
#define TIMER3_A_PIN 9
#define TIMER3_ICP_PIN 10
// Teensy++ 2.0
#elif defined(__AVR_AT90USB1286__) && defined(CORE_TEENSY)
#define TIMER1_A_PIN 25
#define TIMER1_B_PIN 26
#define TIMER1_C_PIN 27
#define TIMER1_ICP_PIN 4
#define TIMER1_CLK_PIN 6
#define TIMER3_A_PIN 16
#define TIMER3_B_PIN 15
#define TIMER3_C_PIN 14
#define TIMER3_ICP_PIN 17
#define TIMER3_CLK_PIN 13
// Teensy 3.0
//
#elif defined(__MK20DX128__)
#define TIMER1_A_PIN 3
#define TIMER1_B_PIN 4
#define TIMER1_ICP_PIN 4
// Teensy 3.1 / Teensy 3.2
//
#elif defined(__MK20DX256__)
#define TIMER1_A_PIN 3
#define TIMER1_B_PIN 4
#define TIMER1_ICP_PIN 4
#define TIMER3_A_PIN 32
#define TIMER3_B_PIN 25
#define TIMER3_ICP_PIN 32
// Teensy 3.5 / Teensy 3.6
//
#elif defined(__MK64FX512__) || defined(__MK66FX1M0__)
#define TIMER1_A_PIN 3
#define TIMER1_B_PIN 4
#define TIMER1_ICP_PIN 4
#define TIMER3_A_PIN 29
#define TIMER3_B_PIN 30
#define TIMER3_ICP_PIN 29
// Teensy-LC
//
#elif defined(__MKL26Z64__)
#define TIMER1_A_PIN 16
#define TIMER1_B_PIN 17
#define TIMER1_ICP_PIN 17
#define TIMER3_A_PIN 3
#define TIMER3_B_PIN 4
#define TIMER3_ICP_PIN 4
// Arduino Mega
//
#elif defined(__AVR_ATmega1280__) || defined(__AVR_ATmega2560__)
#define TIMER1_A_PIN 11
#define TIMER1_B_PIN 12
#define TIMER1_C_PIN 13
#define TIMER3_A_PIN 5
#define TIMER3_B_PIN 2
#define TIMER3_C_PIN 3
#define TIMER4_A_PIN 6
#define TIMER4_B_PIN 7
#define TIMER4_C_PIN 8
#define TIMER4_ICP_PIN 49
#define TIMER5_A_PIN 46
#define TIMER5_B_PIN 45
#define TIMER5_C_PIN 44
#define TIMER3_ICP_PIN 48
#define TIMER3_CLK_PIN 47
// Arduino Leonardo, Yun, etc
//
#elif defined(__AVR_ATmega32U4__)
#define TIMER1_A_PIN 9
#define TIMER1_B_PIN 10
#define TIMER1_C_PIN 11
#define TIMER1_ICP_PIN 4
#define TIMER1_CLK_PIN 12
#define TIMER3_A_PIN 5
#define TIMER3_ICP_PIN 13
// Uno, Duemilanove, LilyPad, etc
//
#elif defined (__AVR_ATmega168__) || defined (__AVR_ATmega328P__)
#define TIMER1_A_PIN 9
#define TIMER1_B_PIN 10
#define TIMER1_ICP_PIN 8
#define TIMER1_CLK_PIN 5
// Sanguino
//
#elif defined(__AVR_ATmega644P__) || defined(__AVR_ATmega644__)
#define TIMER1_A_PIN 13
#define TIMER1_B_PIN 12
#define TIMER1_ICP_PIN 14
#define TIMER1_CLK_PIN 1
// Wildfire - Wicked Devices
//
#elif defined(__AVR_ATmega1284P__) && defined(WILDFIRE_VERSION) && WILDFIRE_VERSION >= 3
#define TIMER1_A_PIN 5 // PD5
#define TIMER1_B_PIN 8 // PD4
#define TIMER1_ICP_PIN 6 // PD6
#define TIMER1_CLK_PIN 23 // PB1
#define TIMER3_A_PIN 12 // PB6
#define TIMER3_B_PIN 13 // PB7
#define TIMER3_ICP_PIN 9 // PB5
#define TIMER3_CLK_PIN 0 // PD0
#elif defined(__AVR_ATmega1284P__) && defined(WILDFIRE_VERSION) && WILDFIRE_VERSION < 3
#define TIMER1_A_PIN 5 // PD5
#define TIMER1_B_PIN 4 // PD4
#define TIMER1_ICP_PIN 6 // PD6
#define TIMER1_CLK_PIN 15 // PB1
#define TIMER3_A_PIN 12 // PB6
#define TIMER3_B_PIN 13 // PB7
#define TIMER3_ICP_PIN 11 // PB5
#define TIMER3_CLK_PIN 0 // PD0
// Mighty-1284 - Maniacbug
//
#elif defined(__AVR_ATmega1284P__)
#define TIMER1_A_PIN 12 // PD5
#define TIMER1_B_PIN 13 // PD4
#define TIMER1_ICP_PIN 14 // PD6
#define TIMER1_CLK_PIN 1 // PB1
#define TIMER3_A_PIN 6 // PB6
#define TIMER3_B_PIN 7 // PB7
#define TIMER3_ICP_PIN 5 // PB5
#define TIMER3_CLK_PIN 8 // PD0
#endif
#endif
Write Preview
Loading…
Cancel
Save