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124 lines
4.9 KiB
124 lines
4.9 KiB
/**
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* Marlin 3D Printer Firmware
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*
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* Copyright (c) 2020 MarlinFirmware [https://github.com/MarlinFirmware/Marlin]
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* Copyright (c) 2016 Bob Cousins bobcousins42@googlemail.com
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* Copyright (c) 2017 Victor Perez
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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 <https://www.gnu.org/licenses/>.
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*
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*/
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#pragma once
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#include <stdint.h>
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#include "../../inc/MarlinConfig.h"
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// ------------------------
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// Defines
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// ------------------------
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#define FORCE_INLINE __attribute__((always_inline)) inline
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// STM32 timers may be 16 or 32 bit. Limiting HAL_TIMER_TYPE_MAX to 16 bits
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// avoids issues with STM32F0 MCUs, which seem to pause timers if UINT32_MAX
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// is written to the register. STM32F4 timers do not manifest this issue,
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// even when writing to 16 bit timers.
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//
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// The range of the timer can be queried at runtime using IS_TIM_32B_COUNTER_INSTANCE.
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// This is a more expensive check than a simple compile-time constant, so its
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// implementation is deferred until the desire for a 32-bit range outweighs the cost
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// of adding a run-time check and HAL_TIMER_TYPE_MAX is refactored to allow unique
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// values for each timer.
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#define hal_timer_t uint32_t
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#define HAL_TIMER_TYPE_MAX UINT16_MAX
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#ifndef STEP_TIMER_NUM
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#define STEP_TIMER_NUM 0 // Timer Index for Stepper
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#endif
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#ifndef PULSE_TIMER_NUM
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#define PULSE_TIMER_NUM STEP_TIMER_NUM
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#endif
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#ifndef TEMP_TIMER_NUM
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#define TEMP_TIMER_NUM 1 // Timer Index for Temperature
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#endif
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#define TEMP_TIMER_FREQUENCY 1000 // Temperature::isr() is expected to be called at around 1kHz
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// TODO: get rid of manual rate/prescale/ticks/cycles taken for procedures in stepper.cpp
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#define STEPPER_TIMER_RATE 2000000 // 2 Mhz
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#define STEPPER_TIMER_PRESCALE ((HAL_TIMER_RATE)/(STEPPER_TIMER_RATE))
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#define STEPPER_TIMER_TICKS_PER_US ((STEPPER_TIMER_RATE) / 1000000) // stepper timer ticks per µs
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#define PULSE_TIMER_RATE STEPPER_TIMER_RATE
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#define PULSE_TIMER_PRESCALE STEPPER_TIMER_PRESCALE
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#define PULSE_TIMER_TICKS_PER_US STEPPER_TIMER_TICKS_PER_US
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#define ENABLE_STEPPER_DRIVER_INTERRUPT() HAL_timer_enable_interrupt(STEP_TIMER_NUM)
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#define DISABLE_STEPPER_DRIVER_INTERRUPT() HAL_timer_disable_interrupt(STEP_TIMER_NUM)
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#define STEPPER_ISR_ENABLED() HAL_timer_interrupt_enabled(STEP_TIMER_NUM)
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#define ENABLE_TEMPERATURE_INTERRUPT() HAL_timer_enable_interrupt(TEMP_TIMER_NUM)
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#define DISABLE_TEMPERATURE_INTERRUPT() HAL_timer_disable_interrupt(TEMP_TIMER_NUM)
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extern void Step_Handler();
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extern void Temp_Handler();
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#ifndef HAL_STEP_TIMER_ISR
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#define HAL_STEP_TIMER_ISR() void Step_Handler()
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#endif
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#ifndef HAL_TEMP_TIMER_ISR
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#define HAL_TEMP_TIMER_ISR() void Temp_Handler()
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#endif
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// ------------------------
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// Public Variables
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// ------------------------
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extern HardwareTimer *timer_instance[];
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// ------------------------
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// Public functions
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// ------------------------
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void HAL_timer_start(const uint8_t timer_num, const uint32_t frequency);
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void HAL_timer_enable_interrupt(const uint8_t timer_num);
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void HAL_timer_disable_interrupt(const uint8_t timer_num);
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bool HAL_timer_interrupt_enabled(const uint8_t timer_num);
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// Configure timer priorities for peripherals such as Software Serial or Servos.
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// Exposed here to allow all timer priority information to reside in timers.cpp
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void SetTimerInterruptPriorities();
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// FORCE_INLINE because these are used in performance-critical situations
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FORCE_INLINE bool HAL_timer_initialized(const uint8_t timer_num) {
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return timer_instance[timer_num] != NULL;
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}
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FORCE_INLINE static hal_timer_t HAL_timer_get_count(const uint8_t timer_num) {
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return HAL_timer_initialized(timer_num) ? timer_instance[timer_num]->getCount() : 0;
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}
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// NOTE: Method name may be misleading.
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// STM32 has an Auto-Reload Register (ARR) as opposed to a "compare" register
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FORCE_INLINE static void HAL_timer_set_compare(const uint8_t timer_num, const hal_timer_t overflow) {
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if (HAL_timer_initialized(timer_num)) {
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timer_instance[timer_num]->setOverflow(overflow + 1, TICK_FORMAT); // Value decremented by setOverflow()
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// wiki: "force all registers (Autoreload, prescaler, compare) to be taken into account"
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// So, if the new overflow value is less than the count it will trigger a rollover interrupt.
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if (overflow < timer_instance[timer_num]->getCount()) // Added 'if' here because reports say it won't boot without it
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timer_instance[timer_num]->refresh();
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}
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}
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#define HAL_timer_isr_prologue(TIMER_NUM)
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#define HAL_timer_isr_epilogue(TIMER_NUM)
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