FAST_PWM for STM32F1 (#19952)

This commit is contained in:
Victor 2020-10-30 00:17:04 +02:00 committed by Scott Lahteine
parent ba28660acb
commit 3dbe4ac593
4 changed files with 87 additions and 8 deletions

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@ -244,3 +244,20 @@ void analogWrite(pin_t pin, int pwm_val8); // PWM only! mul by 257 in maple!?
#define PLATFORM_M997_SUPPORT
void flashFirmware(const int16_t);
#define HAL_CAN_SET_PWM_FREQ // This HAL supports PWM Frequency adjustment
/**
* set_pwm_frequency
* Set the frequency of the timer corresponding to the provided pin
* All Timer PWM pins run at the same frequency
*/
void set_pwm_frequency(const pin_t pin, int f_desired);
/**
* set_pwm_duty
* Set the PWM duty cycle of the provided pin to the provided value
* Optionally allows inverting the duty cycle [default = false]
* Optionally allows changing the maximum size of the provided value to enable finer PWM duty control [default = 255]
*/
void set_pwm_duty(const pin_t pin, const uint16_t v, const uint16_t v_size=255, const bool invert=false);

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@ -0,0 +1,68 @@
/**
* Marlin 3D Printer Firmware
* Copyright (c) 2020 MarlinFirmware [https://github.com/MarlinFirmware/Marlin]
*
* Based on Sprinter and grbl.
* Copyright (c) 2011 Camiel Gubbels / Erik van der Zalm
*
* 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 <https://www.gnu.org/licenses/>.
*
*/
#ifdef __STM32F1__
#include "../../inc/MarlinConfigPre.h"
#if NEEDS_HARDWARE_PWM
#include <pwm.h>
#include "HAL.h"
#include "timers.h"
void set_pwm_frequency(const pin_t pin, int f_desired) {
if (!PWM_PIN(pin)) return; // Don't proceed if no hardware timer
timer_dev *timer = PIN_MAP[pin].timer_device;
uint8_t channel = PIN_MAP[pin].timer_channel;
// Protect used timers
if (timer == get_timer_dev(TEMP_TIMER_NUM)) return;
if (timer == get_timer_dev(STEP_TIMER_NUM)) return;
#if PULSE_TIMER_NUM != STEP_TIMER_NUM
if (timer == get_timer_dev(PULSE_TIMER_NUM)) return;
#endif
if (!(timer->regs.bas->SR & TIMER_CR1_CEN)) // Ensure the timer is enabled
timer_init(timer);
timer_set_mode(timer, channel, TIMER_PWM);
uint16_t preload = 255; // Lock 255 PWM resolution for high frequencies
int32_t prescaler = (HAL_TIMER_RATE) / (preload + 1) / f_desired - 1;
if (prescaler > 65535) { // For low frequencies increase prescaler
prescaler = 65535;
preload = (HAL_TIMER_RATE) / (prescaler + 1) / f_desired - 1;
}
if (prescaler < 0) return; // Too high frequency
timer_set_reload(timer, preload);
timer_set_prescaler(timer, prescaler);
}
void set_pwm_duty(const pin_t pin, const uint16_t v, const uint16_t v_size/*=255*/, const bool invert/*=false*/) {
timer_dev *timer = PIN_MAP[pin].timer_device;
uint16_t max_val = timer->regs.bas->ARR * v / v_size;
if (invert) max_val = v_size - max_val;
pwmWrite(pin, max_val);
}
#endif // NEEDS_HARDWARE_PWM
#endif // __STM32F1__

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@ -25,10 +25,6 @@
* Test STM32F1-specific configuration values for errors at compile-time.
*/
#if ENABLED(FAST_PWM_FAN) || SPINDLE_LASER_FREQUENCY
#error "Features requiring Hardware PWM (FAST_PWM_FAN, SPINDLE_LASER_FREQUENCY) are not yet supported on STM32F1."
#endif
#if !defined(HAVE_SW_SERIAL) && HAS_TMC_SW_SERIAL
#warning "With TMC2208/9 consider using SoftwareSerialM with HAVE_SW_SERIAL and appropriate SS_TIMER."
#error "Missing SoftwareSerial implementation."

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@ -55,10 +55,8 @@
#endif
}
#if ENABLED(MARLIN_DEV_MODE)
#if ENABLED(HAL_CAN_SET_PWM_FREQ) && defined(SPINDLE_LASER_FREQUENCY)
EDIT_ITEM_FAST(CUTTER_MENU_FREQUENCY_TYPE, MSG_CUTTER_FREQUENCY, &cutter.frequency, 2000, 50000, cutter.refresh_frequency);
#endif
#if BOTH(MARLIN_DEV_MODE, HAL_CAN_SET_PWM_FREQ) && defined(SPINDLE_LASER_FREQUENCY)
EDIT_ITEM_FAST(CUTTER_MENU_FREQUENCY_TYPE, MSG_CUTTER_FREQUENCY, &cutter.frequency, 2000, 50000, cutter.refresh_frequency);
#endif
END_MENU();
}