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- /**
- * Marlin 3D Printer Firmware
- * Copyright (c) 2020 MarlinFirmware [https://github.com/MarlinFirmware/Marlin]
- * Copyright (c) 2016 Bob Cousins bobcousins42@googlemail.com
- *
- * 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 <https://www.gnu.org/licenses/>.
- */
- #pragma once
-
- /**
- * Description: HAL for Espressif ESP32 WiFi
- */
-
- #define CPU_32_BIT
-
- #include <stdint.h>
-
- #include "../shared/Marduino.h"
- #include "../shared/math_32bit.h"
- #include "../shared/HAL_SPI.h"
-
- #include "fastio.h"
- #include "watchdog.h"
- #include "i2s.h"
-
- #if ENABLED(WIFISUPPORT)
- #include "WebSocketSerial.h"
- #endif
-
- #if ENABLED(ESP3D_WIFISUPPORT)
- #include "esp3dlib.h"
- #endif
-
- #include "FlushableHardwareSerial.h"
-
- // ------------------------
- // Defines
- // ------------------------
-
- extern portMUX_TYPE spinlock;
-
- #define MYSERIAL0 flushableSerial
-
- #if EITHER(WIFISUPPORT, ESP3D_WIFISUPPORT)
- #if ENABLED(ESP3D_WIFISUPPORT)
- #define MYSERIAL1 Serial2Socket
- #else
- #define MYSERIAL1 webSocketSerial
- #endif
- #define NUM_SERIAL 2
- #else
- #define NUM_SERIAL 1
- #endif
-
- #define CRITICAL_SECTION_START() portENTER_CRITICAL(&spinlock)
- #define CRITICAL_SECTION_END() portEXIT_CRITICAL(&spinlock)
- #define ISRS_ENABLED() (spinlock.owner == portMUX_FREE_VAL)
- #define ENABLE_ISRS() if (spinlock.owner != portMUX_FREE_VAL) portEXIT_CRITICAL(&spinlock)
- #define DISABLE_ISRS() portENTER_CRITICAL(&spinlock)
-
- // Fix bug in pgm_read_ptr
- #undef pgm_read_ptr
- #define pgm_read_ptr(addr) (*(addr))
-
- // ------------------------
- // Types
- // ------------------------
-
- typedef int16_t pin_t;
-
- #define HAL_SERVO_LIB Servo
-
- // ------------------------
- // Public Variables
- // ------------------------
-
- /** result of last ADC conversion */
- extern uint16_t HAL_adc_result;
-
- // ------------------------
- // Public functions
- // ------------------------
-
- // clear reset reason
- void HAL_clear_reset_source();
-
- // reset reason
- uint8_t HAL_get_reset_source();
-
- void _delay_ms(int delay);
-
- #pragma GCC diagnostic push
- #pragma GCC diagnostic ignored "-Wunused-function"
- int freeMemory();
- #pragma GCC diagnostic pop
-
- void analogWrite(pin_t pin, int value);
-
- // ADC
- #define HAL_ANALOG_SELECT(pin)
-
- void HAL_adc_init();
-
- #define HAL_ADC_VREF 3.3
- #define HAL_ADC_RESOLUTION 10
- #define HAL_START_ADC(pin) HAL_adc_start_conversion(pin)
- #define HAL_READ_ADC() HAL_adc_result
- #define HAL_ADC_READY() true
-
- void HAL_adc_start_conversion(const uint8_t adc_pin);
-
- #define GET_PIN_MAP_PIN(index) index
- #define GET_PIN_MAP_INDEX(pin) pin
- #define PARSED_PIN_INDEX(code, dval) parser.intval(code, dval)
-
- // Enable hooks into idle and setup for HAL
- #define HAL_IDLETASK 1
- #define BOARD_INIT() HAL_init_board();
- void HAL_idletask();
- void HAL_init();
- void HAL_init_board();
-
- //
- // Delay in cycles (used by DELAY_NS / DELAY_US)
- //
- FORCE_INLINE static void DELAY_CYCLES(uint32_t x) {
- unsigned long start, ccount, stop;
-
- /**
- * It's important to care for race conditions (and overflows) here.
- * Race condition example: If `stop` calculates to being close to the upper boundary of
- * `uint32_t` and if at the same time a longer loop interruption kicks in (e.g. due to other
- * FreeRTOS tasks or interrupts), `ccount` might overflow (and therefore be below `stop` again)
- * without the loop ever being able to notice that `ccount` had already been above `stop` once
- * (and that therefore the number of cycles to delay has already passed).
- * As DELAY_CYCLES (through DELAY_NS / DELAY_US) is used by software SPI bit banging to drive
- * LCDs and therefore might be called very, very often, this seemingly improbable situation did
- * actually happen in reality. It resulted in apparently random print pauses of ~17.9 seconds
- * (0x100000000 / 240 MHz) or multiples thereof, essentially ruining the current print by causing
- * large blobs of filament.
- */
-
- __asm__ __volatile__ ( "rsr %0, ccount" : "=a" (start) );
- stop = start + x;
- ccount = start;
-
- if (stop >= start) {
- // no overflow, so only loop while in between start and stop:
- // 0x00000000 -----------------start****stop-- 0xffffffff
- while (ccount >= start && ccount < stop) {
- __asm__ __volatile__ ( "rsr %0, ccount" : "=a" (ccount) );
- }
- }
- else {
- // stop did overflow, so only loop while outside of stop and start:
- // 0x00000000 **stop-------------------start** 0xffffffff
- while (ccount >= start || ccount < stop) {
- __asm__ __volatile__ ( "rsr %0, ccount" : "=a" (ccount) );
- }
- }
-
- }
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