Shorter paths to HAL, ExtUI (#17156)
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Scott Lahteine
GitHub
139
Marlin/src/HAL/STM32/timers.cpp
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139
Marlin/src/HAL/STM32/timers.cpp
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/**
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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) 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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#if defined(ARDUINO_ARCH_STM32) && !defined(STM32GENERIC)
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#include "HAL.h"
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#include "timers.h"
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// ------------------------
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// Local defines
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// ------------------------
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#define NUM_HARDWARE_TIMERS 2
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#define __TIMER_DEV(X) TIM##X
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#define _TIMER_DEV(X) __TIMER_DEV(X)
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#define STEP_TIMER_DEV _TIMER_DEV(STEP_TIMER)
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#define TEMP_TIMER_DEV _TIMER_DEV(TEMP_TIMER)
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// ------------------------
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// Private Variables
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// ------------------------
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HardwareTimer *timer_instance[NUM_HARDWARE_TIMERS] = { NULL };
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bool timer_enabled[NUM_HARDWARE_TIMERS] = { false };
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// ------------------------
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// Public functions
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// ------------------------
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// frequency is in Hertz
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void HAL_timer_start(const uint8_t timer_num, const uint32_t frequency) {
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if (!HAL_timer_initialized(timer_num)) {
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switch (timer_num) {
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case STEP_TIMER_NUM: // STEPPER TIMER - use a 32bit timer if possible
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timer_instance[timer_num] = new HardwareTimer(STEP_TIMER_DEV);
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/* Set the prescaler to the final desired value.
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* This will change the effective ISR callback frequency but when
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* HAL_timer_start(timer_num=0) is called in the core for the first time
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* the real frequency isn't important as long as, after boot, the ISR
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* gets called with the correct prescaler and count register. So here
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* we set the prescaler to the correct, final value and ignore the frequency
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* asked. We will call back the ISR in 1 second to start at full speed.
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*
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* The proper fix, however, would be a correct initialization OR a
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* HAL_timer_change(const uint8_t timer_num, const uint32_t frequency)
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* which changes the prescaler when an IRQ frequency change is needed
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* (for example when steppers are turned on)
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*/
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timer_instance[timer_num]->setPrescaleFactor(STEPPER_TIMER_PRESCALE); //the -1 is done internally
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timer_instance[timer_num]->setOverflow(_MIN(hal_timer_t(HAL_TIMER_TYPE_MAX), (HAL_TIMER_RATE) / (STEPPER_TIMER_PRESCALE) /* /frequency */), TICK_FORMAT);
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break;
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case TEMP_TIMER_NUM: // TEMP TIMER - any available 16bit timer
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timer_instance[timer_num] = new HardwareTimer(TEMP_TIMER_DEV);
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// The prescale factor is computed automatically for HERTZ_FORMAT
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timer_instance[timer_num]->setOverflow(frequency, HERTZ_FORMAT);
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break;
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}
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HAL_timer_enable_interrupt(timer_num);
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/*
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* Initializes (and unfortunately starts) the timer.
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* This is needed to set correct IRQ priority at the moment but causes
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* no harm since every call to HAL_timer_start() is actually followed by
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* a call to HAL_timer_enable_interrupt() which means that there isn't
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* a case in which you want the timer to run without a callback.
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*/
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timer_instance[timer_num]->resume(); // First call to resume() MUST follow the attachInterrupt()
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// This is fixed in Arduino_Core_STM32 1.8.
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// These calls can be removed and replaced with
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// timer_instance[timer_num]->setInterruptPriority
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switch (timer_num) {
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case STEP_TIMER_NUM:
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HAL_NVIC_SetPriority(STEP_TIMER_IRQ_NAME, STEP_TIMER_IRQ_PRIO, 0);
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break;
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case TEMP_TIMER_NUM:
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HAL_NVIC_SetPriority(TEMP_TIMER_IRQ_NAME, TEMP_TIMER_IRQ_PRIO, 0);
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break;
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}
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}
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}
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void HAL_timer_enable_interrupt(const uint8_t timer_num) {
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if (HAL_timer_initialized(timer_num) && !timer_enabled[timer_num]) {
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timer_enabled[timer_num] = true;
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switch (timer_num) {
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case STEP_TIMER_NUM:
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timer_instance[timer_num]->attachInterrupt(Step_Handler);
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break;
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case TEMP_TIMER_NUM:
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timer_instance[timer_num]->attachInterrupt(Temp_Handler);
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break;
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}
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}
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}
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void HAL_timer_disable_interrupt(const uint8_t timer_num) {
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if (HAL_timer_interrupt_enabled(timer_num)) {
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timer_instance[timer_num]->detachInterrupt();
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timer_enabled[timer_num] = false;
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}
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}
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bool HAL_timer_interrupt_enabled(const uint8_t timer_num) {
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return HAL_timer_initialized(timer_num) && timer_enabled[timer_num];
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}
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// Only for use within the HAL
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TIM_TypeDef * HAL_timer_device(const uint8_t timer_num) {
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switch (timer_num) {
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case STEP_TIMER_NUM: return STEP_TIMER_DEV;
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case TEMP_TIMER_NUM: return TEMP_TIMER_DEV;
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}
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return nullptr;
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}
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#endif // ARDUINO_ARCH_STM32 && !STM32GENERIC
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