94 lines
3.2 KiB
C++
94 lines
3.2 KiB
C++
/**
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* Marlin 3D Printer Firmware
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*
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* Copyright (c) 2019 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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// ------------------------
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// Private Variables
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// ------------------------
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stm32_timer_t TimerHandle[NUM_HARDWARE_TIMERS];
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// ------------------------
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// Public functions
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// ------------------------
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bool timers_initialized[NUM_HARDWARE_TIMERS] = { false };
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void HAL_timer_start(const uint8_t timer_num, const uint32_t frequency) {
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if (!timers_initialized[timer_num]) {
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uint32_t step_prescaler = STEPPER_TIMER_PRESCALE - 1,
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temp_prescaler = TEMP_TIMER_PRESCALE - 1;
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switch (timer_num) {
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case STEP_TIMER_NUM:
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// STEPPER TIMER - use a 32bit timer if possible
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TimerHandle[timer_num].timer = STEP_TIMER_DEV;
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TimerHandle[timer_num].irqHandle = Step_Handler;
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TimerHandleInit(&TimerHandle[timer_num], (((HAL_TIMER_RATE) / step_prescaler) / frequency) - 1, step_prescaler);
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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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// TEMP TIMER - any available 16bit Timer
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TimerHandle[timer_num].timer = TEMP_TIMER_DEV;
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TimerHandle[timer_num].irqHandle = Temp_Handler;
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TimerHandleInit(&TimerHandle[timer_num], (((HAL_TIMER_RATE) / temp_prescaler) / frequency) - 1, temp_prescaler);
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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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timers_initialized[timer_num] = true;
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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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const IRQn_Type IRQ_Id = IRQn_Type(getTimerIrq(TimerHandle[timer_num].timer));
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HAL_NVIC_EnableIRQ(IRQ_Id);
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}
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void HAL_timer_disable_interrupt(const uint8_t timer_num) {
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const IRQn_Type IRQ_Id = IRQn_Type(getTimerIrq(TimerHandle[timer_num].timer));
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HAL_NVIC_DisableIRQ(IRQ_Id);
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// We NEED memory barriers to ensure Interrupts are actually disabled!
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// ( https://dzone.com/articles/nvic-disabling-interrupts-on-arm-cortex-m-and-the )
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__DSB();
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__ISB();
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}
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bool HAL_timer_interrupt_enabled(const uint8_t timer_num) {
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const uint32_t IRQ_Id = getTimerIrq(TimerHandle[timer_num].timer);
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return NVIC->ISER[IRQ_Id >> 5] & _BV32(IRQ_Id & 0x1F);
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}
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#endif // ARDUINO_ARCH_STM32 && !STM32GENERIC
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