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MySensors/libraries/PinChangeInt/PinChangeInt.h
T
Patrick Fallberg af6e5d3019 Resolved various compiler warnings 
This should make Jenkins happy.
2015-08-09 10:06:09 +02:00

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// We use 4-character tabstops, so IN VIM: <esc>:set ts=4 and <esc>:set sw=4
// ...that's: ESCAPE key, colon key, then "s-e-t SPACE key t-s-=-4"
//
/*
* This is the PinChangeInt library for the Arduino.
See google code project for latest, bugs and info http://code.google.com/p/arduino-pinchangeint/
For more information Refer to avr-gcc header files, arduino source and atmega datasheet.
This library was inspired by and derived from "johnboiles" (it seems)
PCInt Arduino Playground example here: http://www.arduino.cc/playground/Main/PcInt
If you are the original author, please let us know at the google code page
It provides an extension to the interrupt support for arduino by
adding pin change interrupts, giving a way for users to have
interrupts drive off of any pin.
This program is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program. If not, see <http://www.gnu.org/licenses/>.
(the file gpl.txt is included with the library's zip package)
*/
//-------- define these in your sketch, if applicable ----------------------------------------------------------
//-------- These must go in your sketch ahead of the #include <PinChangeInt.h> statement -----------------------
// You can reduce the memory footprint of this handler by declaring that there will be no pin change interrupts
// on any one or two of the three ports. If only a single port remains, the handler will be declared inline
// reducing the size and latency of the handler.
// #define NO_PORTB_PINCHANGES // to indicate that port b will not be used for pin change interrupts
// #define NO_PORTC_PINCHANGES // to indicate that port c will not be used for pin change interrupts
// #define NO_PORTD_PINCHANGES // to indicate that port d will not be used for pin change interrupts
// --- Mega support ---
// #define NO_PORTB_PINCHANGES // to indicate that port b will not be used for pin change interrupts
// #define NO_PORTJ_PINCHANGES // to indicate that port c will not be used for pin change interrupts
// #define NO_PORTK_PINCHANGES // to indicate that port d will not be used for pin change interrupts
// In the Mega, there is no Port C, no Port D. Instead, you get Port J and Port K. Port B remains.
// Port J, however, is practically useless because there is only 1 pin available for interrupts. Most
// of the Port J pins are not even connected to a header connection. // </end> "Mega Support" notes
// --- Sanguino, Mioduino support ---
// #define NO_PORTA_PINCHANGES // to indicate that port a will not be used for pin change interrupts
// --------------------
//
// Other preprocessor directives...
// You can reduce the code size by 20-50 bytes, and you can speed up the interrupt routine
// slightly by declaring that you don't care if the static variables PCintPort::pinState and/or
// PCintPort::arduinoPin are set and made available to your interrupt routine.
// #define NO_PIN_STATE // to indicate that you don't need the pinState
// #define NO_PIN_NUMBER // to indicate that you don't need the arduinoPin
// #define DISABLE_PCINT_MULTI_SERVICE // to limit the handler to servicing a single interrupt per invocation.
// #define GET_PCINT_VERSION // to enable the uint16_t getPCIintVersion () function.
// The following is intended for testing purposes. If defined, then a whole host of static variables can be read
// in your interrupt subroutine. It is not defined by default, and you DO NOT want to define this in
// Production code!:
// #define PINMODE
//-------- define the above in your sketch, if applicable ------------------------------------------------------
/*
PinChangeInt.h
---- VERSIONS --- (NOTE TO SELF: Update the PCINT_VERSION define, below) -----------------
Version 2.19 (beta) Tue Nov 20 07:33:37 CST 2012
Version 2.17 (beta) Sat Nov 17 09:46:50 CST 2012
Version 2.11 (beta) Mon Nov 12 09:33:06 CST 2012
Version 2.01 (beta) Thu Jun 28 12:35:48 CDT 2012
Version 1.72 Wed Mar 14 18:57:55 CDT 2012
Version 1.71beta Sat Mar 10 12:57:05 CST 2012
Version 1.6beta Fri Feb 10 08:48:35 CST 2012
Version 1.51 Sun Feb 5 23:28:02 CST 2012
Version 1.5 Thu Feb 2 18:09:49 CST 2012
Version 1.4 Tue Jan 10 09:41:14 CST 2012
Version 1.3 Sat Dec 3 22:56:20 CST 2011
Version 1.2 Sat Dec 3 Sat Dec 3 09:15:52 CST 2011
Version 1.1 Sat Dec 3 00:06:03 CST 2011
*/
#ifndef PinChangeInt_h
#define PinChangeInt_h
#define PCINT_VERSION 2190 // This number MUST agree with the version number, above.
#include "stddef.h"
// Thanks to Maurice Beelen, nms277, Akesson Karlpetter, and Orly Andico for these fixes.
#if defined(ARDUINO) && ARDUINO >= 100
#include <Arduino.h>
#include <new.h>
#include <wiring_private.h> // cby and sbi defined here
#else
#include <WProgram.h>
#include <pins_arduino.h>
#ifndef LIBCALL_PINCHANGEINT
#include "../cppfix/cppfix.h"
#endif
#endif
#undef DEBUG
/*
* Theory: all IO pins on Atmega168 are covered by Pin Change Interrupts.
* The PCINT corresponding to the pin must be enabled and masked, and
* an ISR routine provided. Since PCINTs are per port, not per pin, the ISR
* must use some logic to actually implement a per-pin interrupt service.
*/
/* Pin to interrupt map:
* D0-D7 = PCINT 16-23 = PCIR2 = PD = PCIE2 = pcmsk2
* D8-D13 = PCINT 0-5 = PCIR0 = PB = PCIE0 = pcmsk0
* A0-A5 (D14-D19) = PCINT 8-13 = PCIR1 = PC = PCIE1 = pcmsk1
*/
#undef INLINE_PCINT
#define INLINE_PCINT
// Thanks to cserveny...@gmail.com for MEGA support!
#if defined __AVR_ATmega2560__ || defined __AVR_ATmega1280__ || defined __AVR_ATmega1281__ || defined __AVR_ATmega2561__ || defined __AVR_ATmega640__
#define __USE_PORT_JK
// Mega does not have PORTA, C or D
#define NO_PORTA_PINCHANGES
#define NO_PORTC_PINCHANGES
#define NO_PORTD_PINCHANGES
#if ((defined(NO_PORTB_PINCHANGES) && defined(NO_PORTJ_PINCHANGES)) || \
(defined(NO_PORTJ_PINCHANGES) && defined(NO_PORTK_PINCHANGES)) || \
(defined(NO_PORTK_PINCHANGES) && defined(NO_PORTB_PINCHANGES)))
#define INLINE_PCINT inline
#endif
#else
#if defined(__AVR_ATmega644P__) || defined(__AVR_ATmega644__)
#ifndef NO_PORTA_PINCHANGES
#define __USE_PORT_A
#endif
#else
#define NO_PORTA_PINCHANGES
#endif
// if defined only D .OR. only C .OR. only B .OR. only A, then inline it
#if ( (defined(NO_PORTA_PINCHANGES) && defined(NO_PORTB_PINCHANGES) && defined(NO_PORTC_PINCHANGES)) || \
(defined(NO_PORTA_PINCHANGES) && defined(NO_PORTB_PINCHANGES) && defined(NO_PORTD_PINCHANGES)) || \
(defined(NO_PORTA_PINCHANGES) && defined(NO_PORTC_PINCHANGES) && defined(NO_PORTD_PINCHANGES)) || \
(defined(NO_PORTB_PINCHANGES) && defined(NO_PORTC_PINCHANGES) && defined(NO_PORTD_PINCHANGES)) )
#define INLINE_PCINT inline
#endif
#endif
// Provide drop in compatibility with johnboiles PCInt project at
// http://www.arduino.cc/playground/Main/PcInt
#define PCdetachInterrupt(pin) PCintPort::detachInterrupt(pin)
#define PCattachInterrupt(pin,userFunc,mode) PCintPort::attachInterrupt(pin, userFunc,mode)
#define PCgetArduinoPin() PCintPort::getArduinoPin()
typedef void (*PCIntvoidFuncPtr)(void);
class PCintPort {
public:
PCintPort(int index,int pcindex, volatile uint8_t& maskReg) :
portInputReg(*portInputRegister(index)),
portPCMask(maskReg),
PCICRbit(1 << pcindex),
portRisingPins(0),
portFallingPins(0),
firstPin(NULL)
#ifdef PINMODE
,intrCount(0)
#endif
{
#ifdef FLASH
ledsetup();
#endif
}
volatile uint8_t& portInputReg;
static int8_t attachInterrupt(uint8_t pin, PCIntvoidFuncPtr userFunc, int mode);
static void detachInterrupt(uint8_t pin);
INLINE_PCINT void PCint();
static volatile uint8_t curr;
#ifndef NO_PIN_NUMBER
static volatile uint8_t arduinoPin;
#endif
#ifndef NO_PIN_STATE
static volatile uint8_t pinState;
#endif
#ifdef PINMODE
static volatile uint8_t pinmode;
static volatile uint8_t s_portRisingPins;
static volatile uint8_t s_portFallingPins;
static volatile uint8_t s_lastPinView;
static volatile uint8_t s_pmask;
static volatile char s_PORT;
static volatile uint8_t s_changedPins;
static volatile uint8_t s_portRisingPins_nCurr;
static volatile uint8_t s_portFallingPins_nNCurr;
static volatile uint8_t s_currXORlastPinView;
volatile uint8_t intrCount;
static volatile uint8_t s_count;
static volatile uint8_t pcint_multi;
static volatile uint8_t PCIFRbug;
#endif
#ifdef FLASH
static void ledsetup(void);
#endif
protected:
class PCintPin {
public:
PCintPin() :
PCintFunc((PCIntvoidFuncPtr)NULL),
mode(0) {}
PCIntvoidFuncPtr PCintFunc;
uint8_t mode;
uint8_t mask;
uint8_t arduinoPin;
PCintPin* next;
};
void enable(PCintPin* pin, PCIntvoidFuncPtr userFunc, uint8_t mode);
int8_t addPin(uint8_t arduinoPin,PCIntvoidFuncPtr userFunc, uint8_t mode);
volatile uint8_t& portPCMask;
const uint8_t PCICRbit;
volatile uint8_t portRisingPins;
volatile uint8_t portFallingPins;
volatile uint8_t lastPinView;
PCintPin* firstPin;
PCintPin thePin;
};
#ifndef LIBCALL_PINCHANGEINT // LIBCALL_PINCHANGEINT ***********************************************
volatile uint8_t PCintPort::curr=0;
#ifndef NO_PIN_NUMBER
volatile uint8_t PCintPort::arduinoPin=0;
#endif
#ifndef NO_PIN_STATE
volatile uint8_t PCintPort::pinState=0;
#endif
#ifdef PINMODE
volatile uint8_t PCintPort::pinmode=0;
volatile uint8_t PCintPort::s_portRisingPins=0;
volatile uint8_t PCintPort::s_portFallingPins=0;
volatile uint8_t PCintPort::s_lastPinView=0;
volatile uint8_t PCintPort::s_pmask=0;
volatile char PCintPort::s_PORT='x';
volatile uint8_t PCintPort::s_changedPins=0;
volatile uint8_t PCintPort::s_portRisingPins_nCurr=0;
volatile uint8_t PCintPort::s_portFallingPins_nNCurr=0;
volatile uint8_t PCintPort::s_currXORlastPinView=0;
volatile uint8_t PCintPort::s_count=0;
volatile uint8_t PCintPort::pcint_multi=0;
volatile uint8_t PCintPort::PCIFRbug=0;
#endif
#ifdef FLASH
#define PINLED 13
volatile uint8_t *led_port;
uint8_t led_mask;
uint8_t not_led_mask;
boolean ledsetup_run=false;
void PCintPort::ledsetup(void) {
if (! ledsetup_run) {
led_port=portOutputRegister(digitalPinToPort(PINLED));
led_mask=digitalPinToBitMask(PINLED);
not_led_mask=led_mask^0xFF;
pinMode(PINLED, OUTPUT); digitalWrite(PINLED, LOW);
ledsetup_run=true;
}
};
#endif
// ATMEGA 644
//
#if defined(__AVR_ATmega644P__) || defined(__AVR_ATmega644__) // Sanguino, Mosquino uino bobino bonanafannafofino, me my momino...
#ifndef NO_PORTA_PINCHANGES
PCintPort portA=PCintPort(1, 0,PCMSK0); // port PB==2 (from Arduino.h, Arduino version 1.0)
#endif
#ifndef NO_PORTB_PINCHANGES
PCintPort portB=PCintPort(2, 1,PCMSK1); // port PB==2 (from Arduino.h, Arduino version 1.0)
#endif
#ifndef NO_PORTC_PINCHANGES
PCintPort portC=PCintPort(3, 2,PCMSK2); // port PC==3 (also in pins_arduino.c, Arduino version 022)
#endif
#ifndef NO_PORTD_PINCHANGES
PCintPort portD=PCintPort(4, 3,PCMSK3); // port PD==4
#endif
#else // others
#ifndef NO_PORTB_PINCHANGES
PCintPort portB=PCintPort(2, 0,PCMSK0); // port PB==2 (from Arduino.h, Arduino version 1.0)
#endif
#ifndef NO_PORTC_PINCHANGES // note: no PORTC on MEGA
PCintPort portC=PCintPort(3, 1,PCMSK1); // port PC==3 (also in pins_arduino.c, Arduino version 022)
#endif
#ifndef NO_PORTD_PINCHANGES // note: no PORTD on MEGA
PCintPort portD=PCintPort(4, 2,PCMSK2); // port PD==4
#endif
#endif // defined __AVR_ATmega644__
#ifdef __USE_PORT_JK
#ifndef NO_PORTJ_PINCHANGES
PCintPort portJ=PCintPort(10,1,PCMSK1); // port PJ==10
#endif
#ifndef NO_PORTK_PINCHANGES
PCintPort portK=PCintPort(11,2,PCMSK2); // port PK==11
#endif
#endif // USE_PORT_JK
static PCintPort *lookupPortNumToPort( int portNum ) {
PCintPort *port = NULL;
switch (portNum) {
#ifndef NO_PORTA_PINCHANGES
case 1:
port=&portA;
break;
#endif
#ifndef NO_PORTB_PINCHANGES
case 2:
port=&portB;
break;
#endif
#ifndef NO_PORTC_PINCHANGES
case 3:
port=&portC;
break;
#endif
#ifndef NO_PORTD_PINCHANGES
case 4:
port=&portD;
break;
#endif
#ifdef __USE_PORT_JK
#ifndef NO_PORTJ_PINCHANGES
case 10:
port=&portJ;
break;
#endif
#ifndef NO_PORTK_PINCHANGES
case 11:
port=&portK;
break;
#endif
#endif
}
return port;
}
void PCintPort::enable(PCintPin* p, PCIntvoidFuncPtr userFunc, uint8_t mode) {
// Enable the pin for interrupts by adding to the PCMSKx register.
// ...The final steps; at this point the interrupt is enabled on this pin.
p->mode=mode;
p->PCintFunc=userFunc;
portPCMask |= p->mask;
if ((p->mode == RISING) || (p->mode == CHANGE)) portRisingPins |= p->mask;
if ((p->mode == FALLING) || (p->mode == CHANGE)) portFallingPins |= p->mask;
PCICR |= PCICRbit;
}
int8_t PCintPort::addPin(uint8_t arduinoPin, PCIntvoidFuncPtr userFunc, uint8_t mode)
{
PCintPin* tmp;
// Add to linked list, starting with firstPin. If pin already exists, just enable.
if (firstPin != NULL) {
tmp=firstPin;
do {
if (tmp->arduinoPin == arduinoPin) { enable(tmp, userFunc, mode); return(0); }
if (tmp->next == NULL) break;
tmp=tmp->next;
} while (true);
}
// Create pin p: fill in the data. NOTE: MySensors only support one pin due to size constraints
// TODO: Figure out a better way to solve this without relying on new/malloc
PCintPin* p = &thePin; //PCintPin* p=new PCintPin;
if (p == NULL) return(-1);
p->arduinoPin=arduinoPin;
p->mode = mode;
p->next=NULL;
p->mask = digitalPinToBitMask(arduinoPin); // the mask
if (firstPin == NULL) firstPin=p;
else tmp->next=p;
#ifdef DEBUG
Serial.print("addPin. pin given: "); Serial.print(arduinoPin, DEC);
int addr = (int) p;
Serial.print(" instance addr: "); Serial.println(addr, HEX);
Serial.print("userFunc addr: "); Serial.println((int)p->PCintFunc, HEX);
#endif
enable(p, userFunc, mode);
#ifdef DEBUG
Serial.print("addPin. pin given: "); Serial.print(arduinoPin, DEC), Serial.print (" pin stored: ");
int addr = (int) p;
Serial.print(" instance addr: "); Serial.println(addr, HEX);
#endif
return(1);
}
/*
* attach an interrupt to a specific pin using pin change interrupts.
*/
int8_t PCintPort::attachInterrupt(uint8_t arduinoPin, PCIntvoidFuncPtr userFunc, int mode)
{
PCintPort *port;
uint8_t portNum = digitalPinToPort(arduinoPin);
if ((portNum == NOT_A_PORT) || (userFunc == NULL)) return(-1);
port=lookupPortNumToPort(portNum);
// Added by GreyGnome... must set the initial value of lastPinView for it to be correct on the 1st interrupt.
// ...but even then, how do you define "correct"? Ultimately, the user must specify (not provisioned for yet).
port->lastPinView=port->portInputReg;
#ifdef DEBUG
Serial.print("attachInterrupt FUNC: "); Serial.println(arduinoPin, DEC);
#endif
// map pin to PCIR register
return(port->addPin(arduinoPin,userFunc,mode));
}
void PCintPort::detachInterrupt(uint8_t arduinoPin)
{
PCintPort *port;
PCintPin* current;
uint8_t mask;
#ifdef DEBUG
Serial.print("detachInterrupt: "); Serial.println(arduinoPin, DEC);
#endif
uint8_t portNum = digitalPinToPort(arduinoPin);
if (portNum == NOT_A_PORT) return;
port=lookupPortNumToPort(portNum);
mask=digitalPinToBitMask(arduinoPin);
current=port->firstPin;
//PCintPin* prev=NULL;
while (current) {
if (current->mask == mask) { // found the target
uint8_t oldSREG = SREG;
cli(); // disable interrupts
port->portPCMask &= ~mask; // disable the mask entry.
if (port->portPCMask == 0) PCICR &= ~(port->PCICRbit);
port->portRisingPins &= ~current->mask; port->portFallingPins &= ~current->mask;
// Link the previous' next to the found next. Then remove the found.
//if (prev != NULL) prev->next=current->next; // linked list skips over current.
//else firstPin=current->next; // at the first pin; save the new first pin
SREG = oldSREG; // Restore register; reenables interrupts
return;
}
//prev=current;
current=current->next;
}
}
// common code for isr handler. "port" is the PCINT number.
// there isn't really a good way to back-map ports and masks to pins.
void PCintPort::PCint() {
uint8_t thisChangedPin; //MIKE
(void)thisChangedPin;
#ifdef FLASH
if (*led_port & led_mask) *led_port&=not_led_mask;
else *led_port|=led_mask;
#endif
#ifndef DISABLE_PCINT_MULTI_SERVICE
uint8_t pcifr;
while (true) {
#endif
// get the pin states for the indicated port.
#ifdef PINMODE
PCintPort::s_lastPinView=lastPinView;
intrCount++;
PCintPort::s_count=intrCount;
#endif
// OLD v. 2.01 technique: Test 1: 3163; Test 7: 3993
// From robtillaart online: ------------ (starting v. 2.11beta)
// uint8_t changedPins = PCintPort::curr ^ lastPinView;
// lastPinView = PCintPort::curr;
// uint8_t fastMask = changedPins & ((portRisingPins & PCintPort::curr ) | ( portFallingPins & ~PCintPort::curr ));
// NEW v. 2.11 technique: Test 1: 3270 Test 7: 3987
// -------------------------------------
// was: uint8_t changedPins = PCintPort::curr ^ lastPinView;
// makes test 6 of the PinChangeIntSpeedTest go from 3867 to 3923. Not good.
uint8_t changedPins = (PCintPort::curr ^ lastPinView) &
((portRisingPins & PCintPort::curr ) | ( portFallingPins & ~PCintPort::curr ));
#ifdef PINMODE
PCintPort::s_currXORlastPinView=PCintPort::curr ^ lastPinView;
PCintPort::s_portRisingPins_nCurr=portRisingPins & PCintPort::curr;
PCintPort::s_portFallingPins_nNCurr=portFallingPins & ~PCintPort::curr;
#endif
lastPinView = PCintPort::curr;
PCintPin* p = firstPin;
while (p) {
// Trigger interrupt if the bit is high and it's set to trigger on mode RISING or CHANGE
// Trigger interrupt if the bit is low and it's set to trigger on mode FALLING or CHANGE
thisChangedPin=p->mask & changedPins; // PinChangeIntSpeedTest makes this 3673... weird. But GOOD!!!
if (p->mask & changedPins) {
#ifndef NO_PIN_STATE
PCintPort::pinState=PCintPort::curr & p->mask ? HIGH : LOW;
#endif
#ifndef NO_PIN_NUMBER
PCintPort::arduinoPin=p->arduinoPin;
#endif
#ifdef PINMODE
PCintPort::pinmode=p->mode;
PCintPort::s_portRisingPins=portRisingPins;
PCintPort::s_portFallingPins=portFallingPins;
PCintPort::s_pmask=p->mask;
PCintPort::s_changedPins=changedPins;
#endif
p->PCintFunc();
}
p=p->next;
}
#ifndef DISABLE_PCINT_MULTI_SERVICE
pcifr = PCIFR & PCICRbit;
if (pcifr == 0) break;
PCIFR |= PCICRbit;
#ifdef PINMODE
PCintPort::pcint_multi++;
if (PCIFR & PCICRbit) PCintPort::PCIFRbug=1; // PCIFR & PCICRbit should ALWAYS be 0 here!
#endif
PCintPort::curr=portInputReg;
}
#endif
}
#ifndef NO_PORTA_PINCHANGES
ISR(PCINT0_vect) {
#ifdef PINMODE
PCintPort::s_PORT='A';
#endif
PCintPort::curr = portA.portInputReg;
portA.PCint();
}
#define PORTBVECT PCINT1_vect
#define PORTCVECT PCINT2_vect
#define PORTDVECT PCINT3_vect
#else
#define PORTBVECT PCINT0_vect
#define PORTCVECT PCINT1_vect
#define PORTDVECT PCINT2_vect
#endif
#ifndef NO_PORTB_PINCHANGES
ISR(PORTBVECT) {
#ifdef PINMODE
PCintPort::s_PORT='B';
#endif
PCintPort::curr = portB.portInputReg;
portB.PCint();
}
#endif
#ifndef NO_PORTC_PINCHANGES
ISR(PORTCVECT) {
#ifdef PINMODE
PCintPort::s_PORT='C';
#endif
PCintPort::curr = portC.portInputReg;
portC.PCint();
}
#endif
#ifndef NO_PORTD_PINCHANGES
ISR(PORTDVECT){
#ifdef PINMODE
PCintPort::s_PORT='D';
#endif
PCintPort::curr = portD.portInputReg;
portD.PCint();
}
#endif
#ifdef __USE_PORT_JK
#ifndef NO_PORTJ_PINCHANGES
ISR(PCINT1_vect) {
#ifdef PINMODE
PCintPort::s_PORT='J';
#endif
PCintPort::curr = portJ.portInputReg;
portJ.PCint();
}
#endif
#ifndef NO_PORTK_PINCHANGES
ISR(PCINT2_vect){
#ifdef PINMODE
PCintPort::s_PORT='K';
#endif
PCintPort::curr = portK.portInputReg;
portK.PCint();
}
#endif
#endif // __USE_PORT_JK
#ifdef GET_PCINT_VERSION
uint16_t getPCIntVersion () {
return ((uint16_t) PCINT_VERSION);
}
#endif // GET_PCINT_VERSION
#endif // #ifndef LIBCALL_PINCHANGEINT *************************************************************
#endif // #ifndef PinChangeInt_h *******************************************************************
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