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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
/**
* 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)
typedef ForwardSerial0Type< decltype(Serial2Socket) > DefaultSerial;
extern DefaultSerial MSerial;
#define MYSERIAL1 MSerial
#else
#define MYSERIAL1 webSocketSerial
#endif
#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)
// ------------------------
// 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
// ------------------------
//
// Tone
//
void toneInit();
void tone(const pin_t _pin, const unsigned int frequency, const unsigned long duration=0);
void noTone(const pin_t _pin);
// clear reset reason
void HAL_clear_reset_source();
// reset reason
uint8_t HAL_get_reset_source();
inline void HAL_reboot() {} // reboot the board or restart the bootloader
void _delay_ms(int delay);
#if GCC_VERSION <= 50000
#pragma GCC diagnostic push
#pragma GCC diagnostic ignored "-Wunused-function"
#endif
int freeMemory();
#if GCC_VERSION <= 50000
#pragma GCC diagnostic pop
#endif
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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