115 lines
4.3 KiB
C
115 lines
4.3 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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*
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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 for Arduino Due and compatible (SAM3X8E)
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*
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* For ARDUINO_ARCH_SAM
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*/
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#ifndef _HAL_TIMERS_H
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#define _HAL_TIMERS_H
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// --------------------------------------------------------------------------
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// Includes
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// --------------------------------------------------------------------------
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#include <stdint.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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typedef uint32_t hal_timer_t;
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#define HAL_TIMER_TYPE_MAX 0xFFFFFFFF
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#define STEP_TIMER_NUM 0 // index of timer to use for stepper
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#define TEMP_TIMER_NUM 1 // index of timer to use for temperature
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#define HAL_TIMER_RATE ((SystemCoreClock) / 4) // frequency of timers peripherals
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#define STEPPER_TIMER_PRESCALE 1.0 // prescaler for setting stepper frequency
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#define HAL_STEPPER_TIMER_RATE HAL_TIMER_RATE // frequency of stepper timer (HAL_TIMER_RATE / STEPPER_TIMER_PRESCALE)
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#define HAL_TICKS_PER_US ((HAL_STEPPER_TIMER_RATE) / 1000000) // stepper timer ticks per us
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#define HAL_TEMP_TIMER_RATE 1000000
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#define TEMP_TIMER_FREQUENCY 1000 // temperature interrupt frequency
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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 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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#define HAL_ENABLE_ISRs() do { if (thermalManager.in_temp_isr) DISABLE_TEMPERATURE_INTERRUPT(); else ENABLE_TEMPERATURE_INTERRUPT(); ENABLE_STEPPER_DRIVER_INTERRUPT(); } while(0)
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#define HAL_STEP_TIMER_ISR extern "C" void TIMER0_IRQHandler(void)
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#define HAL_TEMP_TIMER_ISR extern "C" void TIMER1_IRQHandler(void)
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// --------------------------------------------------------------------------
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// Types
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// --------------------------------------------------------------------------
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// --------------------------------------------------------------------------
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// Public Variables
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// --------------------------------------------------------------------------
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// --------------------------------------------------------------------------
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// Public functions
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// --------------------------------------------------------------------------
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void HAL_timer_init(void);
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void HAL_timer_start(const uint8_t timer_num, const uint32_t frequency);
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static FORCE_INLINE void HAL_timer_set_count(const uint8_t timer_num, const hal_timer_t count) {
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switch (timer_num) {
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case 0:
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LPC_TIM0->MR0 = count;
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if (LPC_TIM0->TC > count)
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LPC_TIM0->TC = count - 5; // generate an immediate stepper ISR
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break;
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case 1:
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LPC_TIM1->MR0 = count;
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if (LPC_TIM1->TC > count)
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LPC_TIM1->TC = count - 5; // make sure we don't have one extra long period
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break;
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}
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}
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static FORCE_INLINE hal_timer_t HAL_timer_get_count(const uint8_t timer_num) {
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switch (timer_num) {
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case 0: return LPC_TIM0->MR0;
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case 1: return LPC_TIM1->MR0;
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}
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return 0;
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}
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static FORCE_INLINE hal_timer_t HAL_timer_get_current_count(const uint8_t timer_num) {
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switch (timer_num) {
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case 0: return LPC_TIM0->TC;
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case 1: return LPC_TIM1->TC;
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}
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return 0;
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}
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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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void HAL_timer_isr_prologue(const uint8_t timer_num);
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#endif // _HAL_TIMERS_DUE_H
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