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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,5 @@ | ||
| .pioenvs | ||
| .clang_complete | ||
| .gcc-flags.json | ||
| .piolibdeps | ||
| *.gch |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -1,73 +1,84 @@ | ||
| #include "pcint.h" | ||
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| static int PCintMode[3][8]; | ||
| static HANDLER_TYPE PCintFunc[3][8]; | ||
| static bool PCintLast[3][8];//?we can use only 3 bytes... but will use more processing power calculating masks | ||
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| #ifndef ARDUINO_SAM_DUE | ||
| static int PCintMode[3][8]; | ||
| static HANDLER_TYPE PCintFunc[3][8]; | ||
| static bool PCintLast[3][8];//?we can use only 3 bytes... but will use more processing power calculating masks | ||
| #endif | ||
| /* | ||
| * attach an interrupt to a specific pin using pin change interrupts. | ||
| */ | ||
| void PCattachInterrupt(uint8_t pin, class mixHandler userFunc, uint8_t mode) { | ||
| volatile uint8_t *pcmask=digitalPinToPCMSK(pin); | ||
| if (!pcmask) return;//runtime checking if pin has PCINT, i would prefer a compile time check | ||
| uint8_t bit = digitalPinToPCMSKbit(pin); | ||
| uint8_t mask = 1<<bit; | ||
| uint8_t pcicrBit=digitalPinToPCICRbit(pin); | ||
| PCintMode[pcicrBit][bit] = mode; | ||
| PCintFunc[pcicrBit][bit] = userFunc; | ||
| //initialize last status flags | ||
| PCintLast[pcicrBit][bit]=(*portInputRegister(digitalPinToPort(pin)))&digitalPinToBitMask(pin); | ||
| // set the mask | ||
| *pcmask |= mask; | ||
| // enable the interrupt | ||
| PCICR |= (1<<pcicrBit); | ||
| void PCattachInterrupt(uint8_t pin, HANDLER_TYPE userFunc, uint8_t mode) { | ||
| #ifdef ARDUINO_SAM_DUE | ||
| attachInterrupt(digitalPinToInterrupt(pin),userFunc,mode); | ||
| #else | ||
| volatile uint8_t *pcmask=digitalPinToPCMSK(pin); | ||
| if (!pcmask) return;//runtime checking if pin has PCINT, i would prefer a compile time check | ||
| uint8_t bit = digitalPinToPCMSKbit(pin); | ||
| uint8_t mask = 1<<bit; | ||
| uint8_t pcicrBit=digitalPinToPCICRbit(pin); | ||
| PCintMode[pcicrBit][bit] = mode; | ||
| PCintFunc[pcicrBit][bit] = userFunc; | ||
| //initialize last status flags | ||
| PCintLast[pcicrBit][bit]=(*portInputRegister(digitalPinToPort(pin)))&digitalPinToBitMask(pin); | ||
| // set the mask | ||
| *pcmask |= mask; | ||
| // enable the interrupt | ||
| PCICR |= (1<<pcicrBit); | ||
| #endif | ||
| } | ||
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| void PCdetachInterrupt(uint8_t pin) { | ||
| volatile uint8_t *pcmask=digitalPinToPCMSK(pin); | ||
| if (!pcmask) return;//runtime checking if pin has PCINT, i would prefer a compile time check | ||
| // disable the mask. | ||
| *pcmask &= ~(1<<digitalPinToPCMSKbit(pin)); | ||
| // if that's the last one, disable the interrupt. | ||
| if (*pcmask == 0) | ||
| PCICR &= ~(1<<digitalPinToPCICRbit(pin)); | ||
| #ifdef ARDUINO_SAM_DUE | ||
| detachInterrupt(pin); | ||
| #else | ||
| volatile uint8_t *pcmask=digitalPinToPCMSK(pin); | ||
| if (!pcmask) return;//runtime checking if pin has PCINT, i would prefer a compile time check | ||
| // disable the mask. | ||
| *pcmask &= ~(1<<digitalPinToPCMSKbit(pin)); | ||
| // if that's the last one, disable the interrupt. | ||
| if (*pcmask == 0) | ||
| PCICR &= ~(1<<digitalPinToPCICRbit(pin)); | ||
| #endif | ||
| } | ||
|
|
||
| // 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. | ||
| // here we consider only the first change found ignoring subsequent, assuming no interrupt cascade | ||
| static void PCint(uint8_t port) { | ||
| const uint8_t* map=pcintPinMapBank(port);//get 8 bits pin change map | ||
| for(int i=0;i<8;i++) { | ||
| uint8_t p=digitalPinFromPCINTBank(map,i); | ||
| if (p==-1) | ||
| continue;//its not assigned | ||
| //uint8_t bit = digitalPinToPCMSKbit(p); | ||
| //uint8_t mask = (1<<bit); | ||
| if (PCintFunc[port][i]!=NULL) {//only check active pins | ||
| bool stat=(*portInputRegister(digitalPinToPort(p)))&digitalPinToBitMask(p); | ||
| if (PCintLast[port][i]^stat) {//pin changed! | ||
| PCintLast[port][i]=stat;//register change | ||
| if ( | ||
| (PCintMode[port][i]==CHANGE) | ||
| || ((stat)&&(PCintMode[port][i]==RISING)) | ||
| || ((!stat)&&(PCintMode[port][i]==FALLING)) | ||
| ) { | ||
| PCintFunc[port][i](); | ||
| break;//if using concurrent interrupts remove this | ||
| #ifndef ARDUINO_SAM_DUE | ||
| // 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. | ||
| // here we consider only the first change found ignoring subsequent, assuming no interrupt cascade | ||
| static void PCint(uint8_t port) { | ||
| const uint8_t* map=pcintPinMapBank(port);//get 8 bits pin change map | ||
| for(int i=0;i<8;i++) { | ||
| uint8_t p=digitalPinFromPCINTBank(map,i); | ||
| if (p==-1) | ||
| continue;//its not assigned | ||
| //uint8_t bit = digitalPinToPCMSKbit(p); | ||
| //uint8_t mask = (1<<bit); | ||
| if (PCintFunc[port][i]!=NULL) {//only check active pins | ||
| bool stat=(*portInputRegister(digitalPinToPort(p)))&digitalPinToBitMask(p); | ||
| if (PCintLast[port][i]^stat) {//pin changed! | ||
| PCintLast[port][i]=stat;//register change | ||
| if ( | ||
| (PCintMode[port][i]==CHANGE) | ||
| || ((stat)&&(PCintMode[port][i]==RISING)) | ||
| || ((!stat)&&(PCintMode[port][i]==FALLING)) | ||
| ) { | ||
| PCintFunc[port][i](); | ||
| break;//if using concurrent interrupts remove this | ||
| } | ||
| } | ||
| } | ||
| } | ||
| } | ||
| } | ||
|
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||
| //AVR handle pin change... later figure out the pin | ||
| SIGNAL(PCINT0_vect) { | ||
| PCint(0); | ||
| } | ||
| SIGNAL(PCINT1_vect) { | ||
| PCint(1); | ||
| } | ||
| SIGNAL(PCINT2_vect) { | ||
| PCint(2); | ||
| } | ||
| //AVR handle pin change... later figure out the pin | ||
| SIGNAL(PCINT0_vect) { | ||
| PCint(0); | ||
| } | ||
| SIGNAL(PCINT1_vect) { | ||
| PCint(1); | ||
| } | ||
| SIGNAL(PCINT2_vect) { | ||
| PCint(2); | ||
| } | ||
| #endif |
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