You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
84 lines
3.1 KiB
84 lines
3.1 KiB
/**
|
|
* 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"
|
|
|
|
#include <pwm.h>
|
|
#include "HAL.h"
|
|
#include "timers.h"
|
|
|
|
#define NR_TIMERS TERN(STM32_XL_DENSITY, 14, 8) // Maple timers, 14 for STM32_XL_DENSITY (F/G chips), 8 for HIGH density (C D E)
|
|
|
|
static uint16_t timer_freq[NR_TIMERS];
|
|
|
|
inline uint8_t timer_and_index_for_pin(const pin_t pin, timer_dev **timer_ptr) {
|
|
*timer_ptr = PIN_MAP[pin].timer_device;
|
|
for (uint8_t i = 0; i < NR_TIMERS; i++) if (*timer_ptr == HAL_get_timer_dev(i))
|
|
return i;
|
|
return 0;
|
|
}
|
|
|
|
void set_pwm_duty(const pin_t pin, const uint16_t v, const uint16_t v_size/*=255*/, const bool invert/*=false*/) {
|
|
if (!PWM_PIN(pin)) return;
|
|
|
|
timer_dev *timer; UNUSED(timer);
|
|
if (timer_freq[timer_and_index_for_pin(pin, &timer)] == 0)
|
|
set_pwm_frequency(pin, PWM_FREQUENCY);
|
|
|
|
const uint8_t channel = PIN_MAP[pin].timer_channel;
|
|
const uint16_t duty = invert ? v_size - v : v;
|
|
timer_set_compare(timer, channel, duty);
|
|
timer_set_mode(timer, channel, TIMER_PWM); // PWM Output Mode
|
|
}
|
|
|
|
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; UNUSED(timer);
|
|
timer_freq[timer_and_index_for_pin(pin, &timer)] = f_desired;
|
|
|
|
// Protect used timers
|
|
if (timer == HAL_get_timer_dev(MF_TIMER_TEMP)) return;
|
|
if (timer == HAL_get_timer_dev(MF_TIMER_STEP)) return;
|
|
#if MF_TIMER_PULSE != MF_TIMER_STEP
|
|
if (timer == HAL_get_timer_dev(MF_TIMER_PULSE)) return;
|
|
#endif
|
|
|
|
if (!(timer->regs.bas->SR & TIMER_CR1_CEN)) // Ensure the timer is enabled
|
|
timer_init(timer);
|
|
|
|
const uint8_t channel = PIN_MAP[pin].timer_channel;
|
|
timer_set_mode(timer, channel, TIMER_PWM);
|
|
// Preload (resolution) cannot be equal to duty of 255 otherwise it may not result in digital off or on.
|
|
uint16_t preload = 254;
|
|
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);
|
|
}
|
|
|
|
#endif // __STM32F1__
|
|
|