Marlin_Firmware/Marlin/src/HAL/HAL_STM32F1/HAL_timers_STM32F1.h
2019-03-10 20:44:27 -05:00

167 lines
6.4 KiB
C

/**
* Marlin 3D Printer Firmware
*
* Copyright (C) 2019 MarlinFirmware [https://github.com/MarlinFirmware/Marlin]
* Copyright (c) 2016 Bob Cousins bobcousins42@googlemail.com
* Copyright (c) 2017 Victor Perez
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*
*/
#pragma once
/**
* HAL for stm32duino.com based on Libmaple and compatible (STM32F1)
*/
// --------------------------------------------------------------------------
// Includes
// --------------------------------------------------------------------------
#include <stdint.h>
#include <libmaple/timer.h>
// --------------------------------------------------------------------------
// Defines
// --------------------------------------------------------------------------
/**
* TODO: Check and confirm what timer we will use for each Temps and stepper driving.
* We should probable drive temps with PWM.
*/
#define FORCE_INLINE __attribute__((always_inline)) inline
typedef uint16_t hal_timer_t;
#define HAL_TIMER_TYPE_MAX 0xFFFF
#define HAL_TIMER_RATE (F_CPU) // frequency of timers peripherals
#define STEP_TIMER_CHAN 1 // Channel of the timer to use for compare and interrupts
#define TEMP_TIMER_CHAN 1 // Channel of the timer to use for compare and interrupts
#if defined(MCU_STM32F103CB) || defined(MCU_STM32F103C8)
#define STEP_TIMER_NUM 4 // For C8/CB boards, use timer 4
#else
#define STEP_TIMER_NUM 5 // for other boards, five is fine.
#endif
#define TEMP_TIMER_NUM 2 // index of timer to use for temperature
#define PULSE_TIMER_NUM STEP_TIMER_NUM
#define TEMP_TIMER_PRESCALE 1000 // prescaler for setting Temp timer, 72Khz
#define TEMP_TIMER_FREQUENCY 1000 // temperature interrupt frequency
#define STEPPER_TIMER_PRESCALE 18 // prescaler for setting stepper timer, 4Mhz
#define STEPPER_TIMER_RATE (HAL_TIMER_RATE / STEPPER_TIMER_PRESCALE) // frequency of stepper timer
#define STEPPER_TIMER_TICKS_PER_US ((STEPPER_TIMER_RATE) / 1000000) // stepper timer ticks per µs
#define PULSE_TIMER_RATE STEPPER_TIMER_RATE // frequency of pulse timer
#define PULSE_TIMER_PRESCALE STEPPER_TIMER_PRESCALE
#define PULSE_TIMER_TICKS_PER_US STEPPER_TIMER_TICKS_PER_US
timer_dev* get_timer_dev(int number);
#define TIMER_DEV(num) get_timer_dev(num)
#define STEP_TIMER_DEV TIMER_DEV(STEP_TIMER_NUM)
#define TEMP_TIMER_DEV TIMER_DEV(TEMP_TIMER_NUM)
#define ENABLE_STEPPER_DRIVER_INTERRUPT() timer_enable_irq(STEP_TIMER_DEV, STEP_TIMER_CHAN)
#define DISABLE_STEPPER_DRIVER_INTERRUPT() timer_disable_irq(STEP_TIMER_DEV, STEP_TIMER_CHAN)
#define STEPPER_ISR_ENABLED() HAL_timer_interrupt_enabled(STEP_TIMER_NUM)
#define ENABLE_TEMPERATURE_INTERRUPT() timer_enable_irq(TEMP_TIMER_DEV, TEMP_TIMER_CHAN)
#define DISABLE_TEMPERATURE_INTERRUPT() timer_disable_irq(TEMP_TIMER_DEV, TEMP_TIMER_CHAN)
#define HAL_timer_get_count(timer_num) timer_get_count(TIMER_DEV(timer_num))
// TODO change this
#define HAL_TEMP_TIMER_ISR() extern "C" void tempTC_Handler(void)
#define HAL_STEP_TIMER_ISR() extern "C" void stepTC_Handler(void)
extern "C" void tempTC_Handler(void);
extern "C" void stepTC_Handler(void);
// --------------------------------------------------------------------------
// Types
// --------------------------------------------------------------------------
// --------------------------------------------------------------------------
// Public Variables
// --------------------------------------------------------------------------
/*
static HardwareTimer StepperTimer(STEP_TIMER_NUM);
static HardwareTimer TempTimer(TEMP_TIMER_NUM);
*/
// --------------------------------------------------------------------------
// Public functions
// --------------------------------------------------------------------------
void HAL_timer_start(const uint8_t timer_num, const uint32_t frequency);
void HAL_timer_enable_interrupt(const uint8_t timer_num);
void HAL_timer_disable_interrupt(const uint8_t timer_num);
bool HAL_timer_interrupt_enabled(const uint8_t timer_num);
/**
* NOTE: By default libmaple sets ARPE = 1, which means the Auto reload register is preloaded (will only update with an update event)
* Thus we have to pause the timer, update the value, refresh, resume the timer.
* That seems like a big waste of time and may be better to change the timer config to ARPE = 0, so ARR can be updated any time.
* We are using a Channel in each timer in Capture/Compare mode. We could also instead use the Time Update Event Interrupt, but need to disable ARPE
* so we can change the ARR value on the fly (without calling refresh), and not get an interrupt right there because we caused an UEV.
* This mode pretty much makes 2 timers unusable for PWM since they have their counts updated all the time on ISRs.
* The way Marlin manages timer interrupts doesn't make for an efficient usage in STM32F1
* Todo: Look at that possibility later.
*/
FORCE_INLINE static void HAL_timer_set_compare(const uint8_t timer_num, const hal_timer_t compare) {
//compare = MIN(compare, HAL_TIMER_TYPE_MAX);
switch (timer_num) {
case STEP_TIMER_NUM:
timer_set_compare(STEP_TIMER_DEV, STEP_TIMER_CHAN, compare);
return;
case TEMP_TIMER_NUM:
timer_set_compare(TEMP_TIMER_DEV, TEMP_TIMER_CHAN, compare);
return;
default:
return;
}
}
FORCE_INLINE static hal_timer_t HAL_timer_get_compare(const uint8_t timer_num) {
switch (timer_num) {
case STEP_TIMER_NUM:
return timer_get_compare(STEP_TIMER_DEV, STEP_TIMER_CHAN);
case TEMP_TIMER_NUM:
return timer_get_compare(TEMP_TIMER_DEV, TEMP_TIMER_CHAN);
default:
return 0;
}
}
FORCE_INLINE static void HAL_timer_isr_prologue(const uint8_t timer_num) {
switch (timer_num) {
case STEP_TIMER_NUM:
timer_set_count(STEP_TIMER_DEV, 0);
timer_generate_update(STEP_TIMER_DEV);
return;
case TEMP_TIMER_NUM:
timer_set_count(TEMP_TIMER_DEV, 0);
timer_generate_update(TEMP_TIMER_DEV);
return;
default:
return;
}
}
#define HAL_timer_isr_epilogue(TIMER_NUM)