Browse Source

FAST_PWM for STM32 (#20025)

vanilla_fb_2.0.x
Victor 4 years ago
committed by Scott Lahteine
parent
commit
b767a82bd8
  1. 17
      Marlin/src/HAL/STM32/HAL.h
  2. 57
      Marlin/src/HAL/STM32/fast_pwm.cpp
  3. 3
      Marlin/src/HAL/STM32/inc/SanityCheck.h
  4. 1
      Marlin/src/HAL/STM32/timers.cpp
  5. 2
      Marlin/src/HAL/STM32/timers.h

17
Marlin/src/HAL/STM32/HAL.h

@ -185,3 +185,20 @@ typedef void (*systickCallback_t)(void);
void systick_attach_callback(systickCallback_t cb);
void HAL_SYSTICK_Callback();
extern volatile uint32_t systick_uptime_millis;
#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);

57
Marlin/src/HAL/STM32/fast_pwm.cpp

@ -0,0 +1,57 @@
/**
* 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/>.
*
*/
#include "../../inc/MarlinConfigPre.h"
#if NEEDS_HARDWARE_PWM
#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
PinName pin_name = digitalPinToPinName(pin);
TIM_TypeDef *Instance = (TIM_TypeDef *)pinmap_peripheral(pin_name, PinMap_PWM); // Get HAL timer instance
LOOP_S_L_N(i, 0, NUM_HARDWARE_TIMERS) // Protect used timers
if (timer_instance[i] && timer_instance[i]->getHandle()->Instance == Instance)
return;
pwm_start(pin_name, f_desired, 0, RESOLUTION_8B_COMPARE_FORMAT);
}
void set_pwm_duty(const pin_t pin, const uint16_t v, const uint16_t v_size/*=255*/, const bool invert/*=false*/) {
PinName pin_name = digitalPinToPinName(pin);
TIM_TypeDef *Instance = (TIM_TypeDef *)pinmap_peripheral(pin_name, PinMap_PWM);
uint16_t adj_val = Instance->ARR * v / v_size;
if (invert) adj_val = Instance->ARR - adj_val;
switch (get_pwm_channel(pin_name)) {
case TIM_CHANNEL_1: LL_TIM_OC_SetCompareCH1(Instance, adj_val); break;
case TIM_CHANNEL_2: LL_TIM_OC_SetCompareCH2(Instance, adj_val); break;
case TIM_CHANNEL_3: LL_TIM_OC_SetCompareCH3(Instance, adj_val); break;
case TIM_CHANNEL_4: LL_TIM_OC_SetCompareCH4(Instance, adj_val); break;
}
}
#endif // NEEDS_HARDWARE_PWM

3
Marlin/src/HAL/STM32/inc/SanityCheck.h

@ -28,9 +28,6 @@
// #error "SPINDLE_LASER_PWM_PIN must use SERVO0, SERVO1 or SERVO3 connector"
//#endif
#if ENABLED(FAST_PWM_FAN) || SPINDLE_LASER_FREQUENCY
#error "Features requiring Hardware PWM (FAST_PWM_FAN, SPINDLE_LASER_FREQUENCY) are not yet supported on STM32."
#endif
#if ENABLED(SDCARD_EEPROM_EMULATION) && DISABLED(SDSUPPORT)
#undef SDCARD_EEPROM_EMULATION // Avoid additional error noise

1
Marlin/src/HAL/STM32/timers.cpp

@ -27,7 +27,6 @@
// Local defines
// ------------------------
#define NUM_HARDWARE_TIMERS 2
// Default timer priorities. Override by specifying alternate priorities in the board pins file.
// The TONE timer is not present here, as it currently cannot be set programmatically. It is set

2
Marlin/src/HAL/STM32/timers.h

@ -43,6 +43,8 @@
#define hal_timer_t uint32_t
#define HAL_TIMER_TYPE_MAX UINT16_MAX
#define NUM_HARDWARE_TIMERS 2
#ifndef STEP_TIMER_NUM
#define STEP_TIMER_NUM 0 // Timer Index for Stepper
#endif

Loading…
Cancel
Save