2020-11-04 15:15:19 -06:00
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/**
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* Marlin 3D Printer Firmware
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* Copyright (c) 2020 MarlinFirmware [https://github.com/MarlinFirmware/Marlin]
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*
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* Based on Sprinter and grbl.
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* Copyright (c) 2011 Camiel Gubbels / Erik van der Zalm
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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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#include "../../inc/MarlinConfigPre.h"
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#if NEEDS_HARDWARE_PWM
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#include "HAL.h"
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#include "timers.h"
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void set_pwm_frequency(const pin_t pin, int f_desired) {
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if (!PWM_PIN(pin)) return; // Don't proceed if no hardware timer
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PinName pin_name = digitalPinToPinName(pin);
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TIM_TypeDef *Instance = (TIM_TypeDef *)pinmap_peripheral(pin_name, PinMap_PWM); // Get HAL timer instance
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2020-11-05 17:16:27 -06:00
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2020-11-04 15:15:19 -06:00
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LOOP_S_L_N(i, 0, NUM_HARDWARE_TIMERS) // Protect used timers
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if (timer_instance[i] && timer_instance[i]->getHandle()->Instance == Instance)
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return;
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pwm_start(pin_name, f_desired, 0, RESOLUTION_8B_COMPARE_FORMAT);
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}
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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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PinName pin_name = digitalPinToPinName(pin);
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TIM_TypeDef *Instance = (TIM_TypeDef *)pinmap_peripheral(pin_name, PinMap_PWM);
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uint16_t adj_val = Instance->ARR * v / v_size;
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if (invert) adj_val = Instance->ARR - adj_val;
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switch (get_pwm_channel(pin_name)) {
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case TIM_CHANNEL_1: LL_TIM_OC_SetCompareCH1(Instance, adj_val); break;
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case TIM_CHANNEL_2: LL_TIM_OC_SetCompareCH2(Instance, adj_val); break;
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case TIM_CHANNEL_3: LL_TIM_OC_SetCompareCH3(Instance, adj_val); break;
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case TIM_CHANNEL_4: LL_TIM_OC_SetCompareCH4(Instance, adj_val); break;
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}
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}
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#endif // NEEDS_HARDWARE_PWM
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