2017-11-18 08:08:03 +00:00
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/**
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* Copyright (c) 2011-2012 Arduino. All right reserved.
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
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* See the GNU Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with this library; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
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*/
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2017-08-22 14:30:33 +00:00
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2017-08-26 20:25:25 +00:00
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#ifdef TARGET_LPC1768
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2017-10-24 22:28:33 +00:00
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#include "../../inc/MarlinConfig.h"
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2017-11-19 19:57:07 +00:00
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#include "include/arduino.h"
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2017-08-22 14:30:33 +00:00
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#include "pinmapping.h"
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//#include "HAL_timers.h"
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#include "fastio.h"
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#define GNUM 31
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typedef void (*interruptCB)(void);
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static interruptCB callbacksP0[GNUM];
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static interruptCB callbacksP2[GNUM];
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2017-09-06 11:28:32 +00:00
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extern "C" void GpioEnableInt(const uint32_t port, const uint32_t pin, const uint32_t mode);
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extern "C" void GpioDisableInt(const uint32_t port, const uint32_t pin);
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2017-08-22 14:30:33 +00:00
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//void deadloop(void) {}
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/* Configure PIO interrupt sources */
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static void __initialize() {
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2017-09-06 11:28:32 +00:00
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for (uint8_t i = 0; i < GNUM; i++) {
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callbacksP0[i] = 0;
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callbacksP2[i] = 0;
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}
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NVIC_EnableIRQ(EINT3_IRQn);
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2017-08-22 14:30:33 +00:00
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}
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2017-11-02 23:43:57 +00:00
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void attachInterrupt(const pin_t pin, void (*callback)(void), uint32_t mode) {
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2017-09-06 11:28:32 +00:00
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static int enabled = 0;
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2017-08-22 14:30:33 +00:00
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2017-09-06 11:28:32 +00:00
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if (!INTERRUPT_PIN(pin)) return;
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2017-08-22 14:30:33 +00:00
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2017-09-06 11:28:32 +00:00
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if (!enabled) {
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__initialize();
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++enabled;
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}
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2017-10-26 18:37:26 +00:00
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uint8_t myport = LPC1768_PIN_PORT(pin),
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mypin = LPC1768_PIN_PIN(pin);
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2017-08-22 14:30:33 +00:00
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2017-09-06 11:28:32 +00:00
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if (myport == 0)
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callbacksP0[mypin] = callback;
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else
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callbacksP2[mypin] = callback;
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2017-08-22 14:30:33 +00:00
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2017-09-06 11:28:32 +00:00
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// Enable interrupt
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GpioEnableInt(myport,mypin,mode);
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2017-08-22 14:30:33 +00:00
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}
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2017-11-02 23:43:57 +00:00
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void detachInterrupt(const pin_t pin) {
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2017-09-06 11:28:32 +00:00
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if (!INTERRUPT_PIN(pin)) return;
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2017-08-22 14:30:33 +00:00
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2017-10-26 18:37:26 +00:00
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const uint8_t myport = LPC1768_PIN_PORT(pin),
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mypin = LPC1768_PIN_PIN(pin);
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2017-08-22 14:30:33 +00:00
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2017-09-06 11:28:32 +00:00
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// Disable interrupt
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GpioDisableInt(myport, mypin);
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2017-08-22 14:30:33 +00:00
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2017-09-06 11:28:32 +00:00
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// unset callback
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if (myport == 0)
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callbacksP0[mypin] = 0;
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else //if (myport == 2 )
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callbacksP2[mypin] = 0;
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2017-08-22 14:30:33 +00:00
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}
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2017-09-06 11:28:32 +00:00
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extern "C" void GpioEnableInt(uint32_t port, uint32_t pin, uint32_t mode) {
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//pin here is the processor pin, not logical pin
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if (port == 0) {
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LPC_GPIOINT->IO0IntClr = _BV(pin);
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if (mode == RISING) {
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SBI(LPC_GPIOINT->IO0IntEnR, pin);
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CBI(LPC_GPIOINT->IO0IntEnF, pin);
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}
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else if (mode == FALLING) {
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SBI(LPC_GPIOINT->IO0IntEnF, pin);
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CBI(LPC_GPIOINT->IO0IntEnR, pin);
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}
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else if (mode == CHANGE) {
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SBI(LPC_GPIOINT->IO0IntEnR, pin);
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SBI(LPC_GPIOINT->IO0IntEnF, pin);
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}
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2017-08-22 14:30:33 +00:00
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}
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2017-09-06 11:28:32 +00:00
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else {
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LPC_GPIOINT->IO2IntClr = _BV(pin);
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if (mode == RISING) {
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SBI(LPC_GPIOINT->IO2IntEnR, pin);
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CBI(LPC_GPIOINT->IO2IntEnF, pin);
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}
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else if (mode == FALLING) {
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SBI(LPC_GPIOINT->IO2IntEnF, pin);
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CBI(LPC_GPIOINT->IO2IntEnR, pin);
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}
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else if (mode == CHANGE) {
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SBI(LPC_GPIOINT->IO2IntEnR, pin);
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SBI(LPC_GPIOINT->IO2IntEnF, pin);
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}
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2017-08-22 14:30:33 +00:00
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}
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}
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2017-09-06 11:28:32 +00:00
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extern "C" void GpioDisableInt(const uint32_t port, const uint32_t pin) {
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if (port == 0) {
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CBI(LPC_GPIOINT->IO0IntEnR, pin);
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CBI(LPC_GPIOINT->IO0IntEnF, pin);
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LPC_GPIOINT->IO0IntClr = _BV(pin);
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}
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else {
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CBI(LPC_GPIOINT->IO2IntEnR, pin);
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CBI(LPC_GPIOINT->IO2IntEnF, pin);
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LPC_GPIOINT->IO2IntClr = _BV(pin);
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}
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2017-08-22 14:30:33 +00:00
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}
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2017-09-06 11:28:32 +00:00
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bool isPowerOf2(unsigned int n) {
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return n == 1 || (n & (n - 1)) == 0;
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2017-08-22 14:30:33 +00:00
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}
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2017-09-06 11:28:32 +00:00
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#if 0
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extern "C" void EINT3_IRQHandler () {
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LPC_GPIOINT->IO0IntClr = LPC_GPIOINT->IO2IntClr = 0xFFFFFFFF;
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TOGGLE(13);
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//NVIC_ClearPendingIRQ(EINT3_IRQn);
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}
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#else
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extern "C" void EINT3_IRQHandler(void) {
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// Read in all current interrupt registers. We do this once as the
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// GPIO interrupt registers are on the APB bus, and this is slow.
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uint32_t rise0 = LPC_GPIOINT->IO0IntStatR,
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fall0 = LPC_GPIOINT->IO0IntStatF,
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rise2 = LPC_GPIOINT->IO2IntStatR,
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fall2 = LPC_GPIOINT->IO2IntStatF;
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// Clear the interrupts ASAP
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LPC_GPIOINT->IO0IntClr = LPC_GPIOINT->IO2IntClr = 0xFFFFFFFF;
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NVIC_ClearPendingIRQ(EINT3_IRQn);
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/* multiple pins changes happened.*/
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if (rise0) while (rise0 > 0) { // Continue as long as there are interrupts pending
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const uint8_t bitloc = 31 - __CLZ(rise0); //CLZ returns number of leading zeros, 31 minus that is location of first pending interrupt
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if (callbacksP0[bitloc] != NULL) callbacksP0[bitloc]();
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rise0 -= _BV(bitloc);
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}
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if (fall0) while (fall0 > 0) {
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const uint8_t bitloc = 31 - __CLZ(fall0);
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if (callbacksP0[bitloc] != NULL) callbacksP0[bitloc]();
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fall0 -= _BV(bitloc);
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}
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if (rise2) while(rise2 > 0) {
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const uint8_t bitloc = 31 - __CLZ(rise2);
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if (callbacksP2[bitloc] != NULL) callbacksP2[bitloc]();
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//LPC_GPIOINT->IO2IntClr = 1 << bitloc;
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rise2 -= _BV(bitloc);
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}
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if (fall2) while (fall2 > 0) {
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const uint8_t bitloc = 31 - __CLZ(fall2);
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if (callbacksP2[bitloc] != NULL) callbacksP2[bitloc]();
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//LPC_GPIOINT->IO2IntClr = 1 << bitloc;
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fall2 -= _BV(bitloc);
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}
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//NVIC_ClearPendingIRQ(EINT3_IRQn);
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//LPC_GPIOINT->IO0IntClr = LPC_GPIOINT->IO2IntClr = 0xFFFFFFFF;
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//NVIC_ClearPendingIRQ(EINT3_IRQn);
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}
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2017-08-22 14:30:33 +00:00
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#endif
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2017-08-26 20:25:25 +00:00
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#endif // TARGET_LPC1768
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