624986d423
The current Marlin implementation relies on a timer interrupt to start the ADC conversion and read it. However in some circumstances the interrupt can be delayed resulting in insufficient time being available for the ADC conversion. This results in a bad reading and false temperature fluctuations. These changes make sure that the conversion is complete (by checking the ADC hardware via the HAL) before reading a value. See: https://github.com/MarlinFirmware/Marlin/issues/11323
153 lines
4.1 KiB
C
153 lines
4.1 KiB
C
/**
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* Marlin 3D Printer Firmware
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*
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* Copyright (C) 2016 MarlinFirmware [https://github.com/MarlinFirmware/Marlin]
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* Copyright (c) 2016 Bob Cousins bobcousins42@googlemail.com
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* Copyright (c) 2015-2016 Nico Tonnhofer wurstnase.reprap@gmail.com
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*
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* This program is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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*
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* This program 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. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program. If not, see <http://www.gnu.org/licenses/>.
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*
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*/
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/**
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* HAL_LPC1768/HAL.h
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* Hardware Abstraction Layer for NXP LPC1768
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*/
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#ifndef _HAL_LPC1768_H_
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#define _HAL_LPC1768_H_
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#define CPU_32_BIT
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// --------------------------------------------------------------------------
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// Includes
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// --------------------------------------------------------------------------
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#include <stdint.h>
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#include <stdarg.h>
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#undef min
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#undef max
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#include <algorithm>
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void _printf (const char *format, ...);
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void _putc(uint8_t c);
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uint8_t _getc();
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extern "C" volatile uint32_t _millis;
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//arduino: Print.h
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#define DEC 10
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#define HEX 16
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#define OCT 8
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#define BIN 2
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//arduino: binary.h (weird defines)
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#define B01 1
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#define B10 2
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#include <Arduino.h>
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#include <pinmapping.h>
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#include "../math_32bit.h"
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#include "../HAL_SPI.h"
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#include "fastio.h"
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#include "watchdog.h"
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#include "serial.h"
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#include "HAL_timers.h"
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#include "HardwareSerial.h"
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#define ST7920_DELAY_1 DELAY_NS(600)
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#define ST7920_DELAY_2 DELAY_NS(750)
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#define ST7920_DELAY_3 DELAY_NS(750)
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extern HalSerial usb_serial;
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#if !WITHIN(SERIAL_PORT, -1, 3)
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#error "SERIAL_PORT must be from -1 to 3"
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#endif
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#if SERIAL_PORT == -1
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#define MYSERIAL0 usb_serial
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#elif SERIAL_PORT == 0
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extern HardwareSerial Serial;
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#define MYSERIAL0 Serial
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#elif SERIAL_PORT == 1
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extern HardwareSerial Serial1;
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#define MYSERIAL0 Serial1
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#elif SERIAL_PORT == 2
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extern HardwareSerial Serial2;
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#define MYSERIAL0 Serial2
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#elif SERIAL_PORT == 3
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#define MYSERIAL0 Serial3
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extern HardwareSerial Serial3;
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#endif
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#ifdef SERIAL_PORT_2
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#if !WITHIN(SERIAL_PORT_2, -1, 3)
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#error "SERIAL_PORT_2 must be from -1 to 3"
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#elif SERIAL_PORT_2 == SERIAL_PORT
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#error "SERIAL_PORT_2 must be different than SERIAL_PORT"
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#endif
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#define NUM_SERIAL 2
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#if SERIAL_PORT_2 == -1
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#define MYSERIAL1 usb_serial
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#elif SERIAL_PORT_2 == 0
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extern HardwareSerial Serial;
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#define MYSERIAL1 Serial
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#elif SERIAL_PORT_2 == 1
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extern HardwareSerial Serial1;
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#define MYSERIAL1 Serial1
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#elif SERIAL_PORT_2 == 2
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extern HardwareSerial Serial2;
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#define MYSERIAL1 Serial2
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#elif SERIAL_PORT_2 == 3
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extern HardwareSerial Serial3;
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#define MYSERIAL1 Serial3
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#endif
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#else
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#define NUM_SERIAL 1
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#endif
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#define CRITICAL_SECTION_START uint32_t primask = __get_PRIMASK(); __disable_irq()
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#define CRITICAL_SECTION_END if (!primask) __enable_irq()
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#define ISRS_ENABLED() (!__get_PRIMASK())
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#define ENABLE_ISRS() __enable_irq()
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#define DISABLE_ISRS() __disable_irq()
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//Utility functions
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int freeMemory(void);
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// SPI: Extended functions which take a channel number (hardware SPI only)
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/** Write single byte to specified SPI channel */
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void spiSend(uint32_t chan, byte b);
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/** Write buffer to specified SPI channel */
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void spiSend(uint32_t chan, const uint8_t* buf, size_t n);
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/** Read single byte from specified SPI channel */
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uint8_t spiRec(uint32_t chan);
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// ADC
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#define HAL_ANALOG_SELECT(pin) HAL_adc_enable_channel(pin)
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#define HAL_START_ADC(pin) HAL_adc_start_conversion(pin)
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#define HAL_READ_ADC() HAL_adc_get_result()
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#define HAL_ADC_READY() HAL_adc_finished()
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void HAL_adc_init(void);
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void HAL_adc_enable_channel(int pin);
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void HAL_adc_start_conversion(const uint8_t adc_pin);
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uint16_t HAL_adc_get_result(void);
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bool HAL_adc_finished(void);
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#endif // _HAL_LPC1768_H_
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