[LPC176x] Endstop Interrupts Feature (#11202)
Enable the endstop interrupts feature for LPC176x boards. Although Smoothieboard chose to use non-interrupt capable pins for their endstops, and this has been copied by clones, so they can't use it.
This commit is contained in:
Chris Pepper
Scott Lahteine
parent
5abf5bc8a7
commit
55f4744e54
@ -19,29 +19,20 @@
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#ifdef TARGET_LPC1768
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#include "../../inc/MarlinConfig.h"
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#include <Arduino.h>
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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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static interruptCB callbacksP0[GNUM] = {};
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static interruptCB callbacksP2[GNUM] = {};
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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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//void deadloop(void) {}
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/* Configure PIO interrupt sources */
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static void __initialize() {
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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_SetPriority(EINT3_IRQn, NVIC_EncodePriority(0, 1, 0));
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NVIC_EnableIRQ(EINT3_IRQn);
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}
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@ -54,6 +45,7 @@ void attachInterrupt(const pin_t pin, void (*callback)(void), uint32_t mode) {
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__initialize();
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++enabled;
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}
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uint8_t myport = LPC1768_PIN_PORT(pin),
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mypin = LPC1768_PIN_PIN(pin);
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@ -130,60 +122,41 @@ extern "C" void GpioDisableInt(const uint32_t port, const uint32_t pin) {
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}
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}
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constexpr bool isPowerOf2(const uint16_t n) {
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return IS_POWER_OF_2(n);
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}
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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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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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while (rise0 > 0) { // If multiple pins changes happened 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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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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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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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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#endif
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}
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#endif // TARGET_LPC1768
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@ -37,9 +37,6 @@
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#ifndef _ENDSTOP_INTERRUPTS_H_
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#define _ENDSTOP_INTERRUPTS_H_
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//Currently this is untested and broken
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#error "Please disable Endstop Interrupts LPC176x is currently an unsupported platform"
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#include "../../module/endstops.h"
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// One ISR for all EXT-Interrupts
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@ -47,30 +44,57 @@ void endstop_ISR(void) { endstops.update(); }
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void setup_endstop_interrupts(void) {
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#if HAS_X_MAX
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attachInterrupt(digitalPinToInterrupt(X_MAX_PIN), endstop_ISR, CHANGE); // assign it
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#if !LPC1768_PIN_INTERRUPT_M(X_MAX_PIN)
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#error "X_MAX_PIN is not an INTERRUPT capable pin."
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#endif
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attachInterrupt(digitalPinToInterrupt(X_MAX_PIN), endstop_ISR, CHANGE);
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#endif
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#if HAS_X_MIN
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#if !LPC1768_PIN_INTERRUPT_M(X_MIN_PIN)
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#error "X_MIN_PIN is not an INTERRUPT capable pin."
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#endif
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attachInterrupt(digitalPinToInterrupt(X_MIN_PIN), endstop_ISR, CHANGE);
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#endif
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#if HAS_Y_MAX
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#if !LPC1768_PIN_INTERRUPT_M(Y_MAX_PIN)
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#error "Y_MAX_PIN is not an INTERRUPT capable pin."
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#endif
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attachInterrupt(digitalPinToInterrupt(Y_MAX_PIN), endstop_ISR, CHANGE);
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#endif
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#if HAS_Y_MIN
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#if !LPC1768_PIN_INTERRUPT_M(Y_MIN_PIN)
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#error "Y_MIN_PIN is not an INTERRUPT capable pin."
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#endif
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attachInterrupt(digitalPinToInterrupt(Y_MIN_PIN), endstop_ISR, CHANGE);
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#endif
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#if HAS_Z_MAX
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#if !LPC1768_PIN_INTERRUPT_M(Z_MAX_PIN)
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#error "Z_MAX_PIN is not an INTERRUPT capable pin."
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#endif
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attachInterrupt(digitalPinToInterrupt(Z_MAX_PIN), endstop_ISR, CHANGE);
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#endif
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#if HAS_Z_MIN
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#if !LPC1768_PIN_INTERRUPT_M(Z_MIN_PIN)
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#error "Z_MIN_PIN is not an INTERRUPT capable pin."
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#endif
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attachInterrupt(digitalPinToInterrupt(Z_MIN_PIN), endstop_ISR, CHANGE);
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#endif
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#if HAS_Z2_MAX
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#if !LPC1768_PIN_INTERRUPT_M(Z2_MAX_PIN)
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#error "Z2_MAX_PIN is not an INTERRUPT capable pin."
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#endif
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attachInterrupt(digitalPinToInterrupt(Z2_MAX_PIN), endstop_ISR, CHANGE);
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#endif
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#if HAS_Z2_MIN
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#if !LPC1768_PIN_INTERRUPT_M(Z2_MIN_PIN)
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#error "Z2_MIN_PIN is not an INTERRUPT capable pin."
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#endif
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attachInterrupt(digitalPinToInterrupt(Z2_MIN_PIN), endstop_ISR, CHANGE);
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#endif
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#if HAS_Z_MIN_PROBE_PIN
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#if !LPC1768_PIN_INTERRUPT_M(Z_MIN_PROBE_PIN)
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#error "Z_MIN_PROBE_PIN is not an INTERRUPT capable pin."
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#endif
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attachInterrupt(digitalPinToInterrupt(Z_MIN_PROBE_PIN), endstop_ISR, CHANGE);
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#endif
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}
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@ -267,7 +267,7 @@ constexpr pin_t adc_pin_table[] = {
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// Get the digital pin for an analog index
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pin_t analogInputToDigitalPin(const int8_t p);
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#define digitalPinToInterrupt(pin) (pin)
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// Return the index of a pin number
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// The pin number given here is in the form ppp:nnnnn
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int16_t GET_PIN_MAP_INDEX(const pin_t pin);
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@ -283,6 +283,7 @@ bool PWM_PIN(const pin_t p);
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// Test whether the pin is interruptable
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bool INTERRUPT_PIN(const pin_t p);
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#define LPC1768_PIN_INTERRUPT_M(pin) (((pin >> 8) & 0b1) != 0)
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// Get the pin number at the given index
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pin_t GET_PIN_MAP_PIN(const int16_t ind);
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