114 lines
4.3 KiB
C++
114 lines
4.3 KiB
C++
/**
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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 <https://www.gnu.org/licenses/>.
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*
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*/
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#if defined(STM32GENERIC) && defined(STM32F4)
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#include "../../../inc/MarlinConfig.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 STEP_TIMER_IRQ_ID TIM5_IRQn
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#define TEMP_TIMER_IRQ_ID TIM7_IRQn
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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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constexpr 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 TIM5 - use a 32bit timer
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__HAL_RCC_TIM5_CLK_ENABLE();
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TimerHandle[timer_num].handle.Instance = TIM5;
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TimerHandle[timer_num].handle.Init.Prescaler = step_prescaler;
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TimerHandle[timer_num].handle.Init.CounterMode = TIM_COUNTERMODE_UP;
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TimerHandle[timer_num].handle.Init.ClockDivision = TIM_CLOCKDIVISION_DIV1;
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TimerHandle[timer_num].callback = (uint32_t)TC5_Handler;
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HAL_NVIC_SetPriority(STEP_TIMER_IRQ_ID, 1, 0);
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break;
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case TEMP_TIMER_NUM:
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// TEMP TIMER TIM7 - any available 16bit Timer (1 already used for PWM)
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__HAL_RCC_TIM7_CLK_ENABLE();
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TimerHandle[timer_num].handle.Instance = TIM7;
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TimerHandle[timer_num].handle.Init.Prescaler = temp_prescaler;
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TimerHandle[timer_num].handle.Init.CounterMode = TIM_COUNTERMODE_UP;
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TimerHandle[timer_num].handle.Init.ClockDivision = TIM_CLOCKDIVISION_DIV1;
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TimerHandle[timer_num].callback = (uint32_t)TC7_Handler;
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HAL_NVIC_SetPriority(TEMP_TIMER_IRQ_ID, 2, 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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TimerHandle[timer_num].handle.Init.Period = (((HAL_TIMER_RATE) / TimerHandle[timer_num].handle.Init.Prescaler) / frequency) - 1;
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if (HAL_TIM_Base_Init(&TimerHandle[timer_num].handle) == HAL_OK)
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HAL_TIM_Base_Start_IT(&TimerHandle[timer_num].handle);
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}
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extern "C" {
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void TIM5_IRQHandler() { ((void(*)())TimerHandle[0].callback)(); }
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void TIM7_IRQHandler() { ((void(*)())TimerHandle[1].callback)(); }
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}
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void HAL_timer_enable_interrupt(const uint8_t timer_num) {
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switch (timer_num) {
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case STEP_TIMER_NUM: HAL_NVIC_EnableIRQ(STEP_TIMER_IRQ_ID); break;
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case TEMP_TIMER_NUM: HAL_NVIC_EnableIRQ(TEMP_TIMER_IRQ_ID); break;
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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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switch (timer_num) {
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case STEP_TIMER_NUM: HAL_NVIC_DisableIRQ(STEP_TIMER_IRQ_ID); break;
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case TEMP_TIMER_NUM: HAL_NVIC_DisableIRQ(TEMP_TIMER_IRQ_ID); break;
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}
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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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switch (timer_num) {
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case STEP_TIMER_NUM: return NVIC->ISER[(uint32_t)((int32_t)STEP_TIMER_IRQ_ID) >> 5] & (uint32_t)(1 << ((uint32_t)((int32_t)STEP_TIMER_IRQ_ID) & (uint32_t)0x1F));
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case TEMP_TIMER_NUM: return NVIC->ISER[(uint32_t)((int32_t)TEMP_TIMER_IRQ_ID) >> 5] & (uint32_t)(1 << ((uint32_t)((int32_t)TEMP_TIMER_IRQ_ID) & (uint32_t)0x1F));
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}
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return false;
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}
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#endif // STM32GENERIC && STM32F4
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