3DPrinting/MarlinFirmware
1
0
Fork 0
mirror of https://github.com/MarlinFirmware/Marlin.git synced 2024-11-23 12:04:19 +00:00
Code Issues Releases Wiki Activity

Move FAST_PWM_FAN code to HALs (#13491)

Browse Source
This commit is contained in:
Chris Pepper 2019-03-26 06:03:23 +00:00 committed by Scott Lahteine
parent 263f8edff8
commit ffc2c2d7c5
18 changed files with 369 additions and 284 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

19
Marlin/src/HAL/HAL_AVR/HAL.h
View File

@ -372,3 +372,22 @@ inline void HAL_adc_init(void) {
// AVR compatibility
#define strtof strtod
/**
* set_pwm_frequency
* Sets the frequency of the timer corresponding to the provided pin
* as close as possible to the provided desired frequency. Internally
* calculates the required waveform generation mode, prescaler and
* resolution values required and sets the timer registers accordingly.
* NOTE that the frequency is applied to all pins on the timer (Ex OC3A, OC3B and OC3B)
* NOTE that there are limitations, particularly if using TIMER2. (see Configuration_adv.h -> FAST FAN PWM Settings)
*/
void set_pwm_frequency(const pin_t pin, int f_desired);
/**
* set_pwm_duty
* Sets 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);

250
Marlin/src/HAL/HAL_AVR/fast_pwm.cpp Normal file
View File

@ -0,0 +1,250 @@
#ifdef __AVR__
#include "../../inc/MarlinConfigPre.h"
/**
* get_pwm_timer
* Grabs timer information and registers of the provided pin
* returns Timer struct containing this information
* Used by set_pwm_frequency, set_pwm_duty
*
*/
#if ENABLED(FAST_PWM_FAN)
#include "HAL.h"
struct Timer {
volatile uint8_t* TCCRnQ[3]; // max 3 TCCR registers per timer
volatile uint16_t* OCRnQ[3]; // max 3 OCR registers per timer
volatile uint16_t* ICRn; // max 1 ICR register per timer
uint8_t n; // the timer number [0->5]
uint8_t q; // the timer output [0->2] (A->C)
};
Timer get_pwm_timer(pin_t pin) {
uint8_t q = 0;
switch (digitalPinToTimer(pin)) {
// Protect reserved timers (TIMER0 & TIMER1)
#ifdef TCCR0A
#if !AVR_AT90USB1286_FAMILY
case TIMER0A:
#endif
case TIMER0B:
#endif
#ifdef TCCR1A
case TIMER1A: case TIMER1B:
#endif
break;
#if defined(TCCR2) || defined(TCCR2A)
#ifdef TCCR2
case TIMER2: {
Timer timer = {
/*TCCRnQ*/ { &TCCR2, NULL, NULL},
/*OCRnQ*/ { (uint16_t*)&OCR2, NULL, NULL},
/*ICRn*/ NULL,
/*n, q*/ 2, 0
};
}
#elif defined TCCR2A
#if ENABLED(USE_OCR2A_AS_TOP)
case TIMER2A: break; // protect TIMER2A
case TIMER2B: {
Timer timer = {
/*TCCRnQ*/ { &TCCR2A, &TCCR2B, NULL},
/*OCRnQ*/ { (uint16_t*)&OCR2A, (uint16_t*)&OCR2B, NULL},
/*ICRn*/ NULL,
/*n, q*/ 2, 1
};
return timer;
}
#else
case TIMER2B: ++q;
case TIMER2A: {
Timer timer = {
/*TCCRnQ*/ { &TCCR2A, &TCCR2B, NULL},
/*OCRnQ*/ { (uint16_t*)&OCR2A, (uint16_t*)&OCR2B, NULL},
/*ICRn*/ NULL,
2, q
};
return timer;
}
#endif
#endif
#endif
#ifdef TCCR3A
case TIMER3C: ++q;
case TIMER3B: ++q;
case TIMER3A: {
Timer timer = {
/*TCCRnQ*/ { &TCCR3A, &TCCR3B, &TCCR3C},
/*OCRnQ*/ { &OCR3A, &OCR3B, &OCR3C},
/*ICRn*/ &ICR3,
/*n, q*/ 3, q
};
return timer;
}
#endif
#ifdef TCCR4A
case TIMER4C: ++q;
case TIMER4B: ++q;
case TIMER4A: {
Timer timer = {
/*TCCRnQ*/ { &TCCR4A, &TCCR4B, &TCCR4C},
/*OCRnQ*/ { &OCR4A, &OCR4B, &OCR4C},
/*ICRn*/ &ICR4,
/*n, q*/ 4, q
};
return timer;
}
#endif
#ifdef TCCR5A
case TIMER5C: ++q;
case TIMER5B: ++q;
case TIMER5A: {
Timer timer = {
/*TCCRnQ*/ { &TCCR5A, &TCCR5B, &TCCR5C},
/*OCRnQ*/ { &OCR5A, &OCR5B, &OCR5C },
/*ICRn*/ &ICR5,
/*n, q*/ 5, q
};
return timer;
}
#endif
}
Timer timer = {
/*TCCRnQ*/ { NULL, NULL, NULL},
/*OCRnQ*/ { NULL, NULL, NULL},
/*ICRn*/ NULL,
0, 0
};
return timer;
}
void set_pwm_frequency(const pin_t pin, int f_desired) {
Timer timer = get_pwm_timer(pin);
if (timer.n == 0) return; // Don't proceed if protected timer or not recognised
uint16_t size;
if (timer.n == 2) size = 255; else size = 65535;
uint16_t res = 255; // resolution (TOP value)
uint8_t j = 0; // prescaler index
uint8_t wgm = 1; // waveform generation mode
// Calculating the prescaler and resolution to use to achieve closest frequency
if (f_desired != 0) {
int f = (F_CPU) / (2 * 1024 * size) + 1; // Initialize frequency as lowest (non-zero) achievable
uint16_t prescaler[] = { 0, 1, 8, /*TIMER2 ONLY*/32, 64, /*TIMER2 ONLY*/128, 256, 1024 };
// loop over prescaler values
for (uint8_t i = 1; i < 8; i++) {
uint16_t res_temp_fast = 255, res_temp_phase_correct = 255;
if (timer.n == 2) {
// No resolution calculation for TIMER2 unless enabled USE_OCR2A_AS_TOP
#if ENABLED(USE_OCR2A_AS_TOP)
const uint16_t rtf = (F_CPU) / (prescaler[i] * f_desired);
res_temp_fast = rtf - 1;
res_temp_phase_correct = rtf / 2;
#endif
}
else {
// Skip TIMER2 specific prescalers when not TIMER2
if (i == 3 || i == 5) continue;
const uint16_t rtf = (F_CPU) / (prescaler[i] * f_desired);
res_temp_fast = rtf - 1;
res_temp_phase_correct = rtf / 2;
}
LIMIT(res_temp_fast, 1u, size);
LIMIT(res_temp_phase_correct, 1u, size);
// Calculate frequencies of test prescaler and resolution values
const int f_temp_fast = (F_CPU) / (prescaler[i] * (1 + res_temp_fast)),
f_temp_phase_correct = (F_CPU) / (2 * prescaler[i] * res_temp_phase_correct),
f_diff = ABS(f - f_desired),
f_fast_diff = ABS(f_temp_fast - f_desired),
f_phase_diff = ABS(f_temp_phase_correct - f_desired);
// If FAST values are closest to desired f
if (f_fast_diff < f_diff && f_fast_diff <= f_phase_diff) {
// Remember this combination
f = f_temp_fast;
res = res_temp_fast;
j = i;
// Set the Wave Generation Mode to FAST PWM
if (timer.n == 2) {
wgm = (
#if ENABLED(USE_OCR2A_AS_TOP)
WGM2_FAST_PWM_OCR2A
#else
WGM2_FAST_PWM
#endif
);
}
else wgm = WGM_FAST_PWM_ICRn;
}
// If PHASE CORRECT values are closes to desired f
else if (f_phase_diff < f_diff) {
f = f_temp_phase_correct;
res = res_temp_phase_correct;
j = i;
// Set the Wave Generation Mode to PWM PHASE CORRECT
if (timer.n == 2) {
wgm = (
#if ENABLED(USE_OCR2A_AS_TOP)
WGM2_PWM_PC_OCR2A
#else
WGM2_PWM_PC
#endif
);
}
else wgm = WGM_PWM_PC_ICRn;
}
}
}
_SET_WGMnQ(timer.TCCRnQ, wgm);
_SET_CSn(timer.TCCRnQ, j);
if (timer.n == 2) {
#if ENABLED(USE_OCR2A_AS_TOP)
_SET_OCRnQ(timer.OCRnQ, 0, res); // Set OCR2A value (TOP) = res
#endif
}
else
_SET_ICRn(timer.ICRn, res); // Set ICRn value (TOP) = res
}
void set_pwm_duty(const pin_t pin, const uint16_t v, const uint16_t v_size/*=255*/, const bool invert/*=false*/) {
// If v is 0 or v_size (max), digitalWrite to LOW or HIGH.
// Note that digitalWrite also disables pwm output for us (sets COM bit to 0)
if (v == 0)
digitalWrite(pin, invert);
else if (v == v_size)
digitalWrite(pin, !invert);
else {
Timer timer = get_pwm_timer(pin);
if (timer.n == 0) return; // Don't proceed if protected timer or not recognised
// Set compare output mode to CLEAR -> SET or SET -> CLEAR (if inverted)
_SET_COMnQ(timer.TCCRnQ, (timer.q
#ifdef TCCR2
+ (timer.q == 2) // COM20 is on bit 4 of TCCR2, thus requires q + 1 in the macro
#endif
), COM_CLEAR_SET + invert
);
uint16_t top;
if (timer.n == 2) { // if TIMER2
top = (
#if ENABLED(USE_OCR2A_AS_TOP)
*timer.OCRnQ[0] // top = OCR2A
#else
255 // top = 0xFF (max)
#endif
);
}
else
top = *timer.ICRn; // top = ICRn
_SET_OCRnQ(timer.OCRnQ, timer.q, v * float(top / v_size)); // Scale 8/16-bit v to top value
}
}
#endif // FAST_PWM_FAN
#endif // __AVR__

10
Marlin/src/HAL/HAL_AVR/fastio_AVR.h
View File

@ -200,7 +200,7 @@ enum ClockSource2 : char {
TCCR##T##B = (TCCR##T##B & ~(0x3 << WGM##T##2)) | (((int(V) >> 2) & 0x3) << WGM##T##2); \
}while(0)
#define SET_WGM(T,V) _SET_WGM(T,WGM_##V)
// Runtime (see Temperature::set_pwm_frequency):
// Runtime (see set_pwm_frequency):
#define _SET_WGMnQ(TCCRnQ, V) do{ \
*(TCCRnQ)[0] = (*(TCCRnQ)[0] & ~(0x3 << 0)) | (( int(V) & 0x3) << 0); \
*(TCCRnQ)[1] = (*(TCCRnQ)[1] & ~(0x3 << 3)) | (((int(V) >> 2) & 0x3) << 3); \
@ -230,7 +230,7 @@ enum ClockSource2 : char {
#define SET_CS4(V) _SET_CS4(CS_##V)
#define SET_CS5(V) _SET_CS5(CS_##V)
#define SET_CS(T,V) SET_CS##T(V)
// Runtime (see Temperature::set_pwm_frequency)
// Runtime (see set_pwm_frequency)
#define _SET_CSn(TCCRnQ, V) do{ \
(*(TCCRnQ)[1] = (*(TCCRnQ[1]) & ~(0x7 << 0)) | ((int(V) & 0x7) << 0)); \
}while(0)
@ -243,19 +243,19 @@ enum ClockSource2 : char {
#define SET_COMB(T,V) SET_COM(T,B,V)
#define SET_COMC(T,V) SET_COM(T,C,V)
#define SET_COMS(T,V1,V2,V3) do{ SET_COMA(T,V1); SET_COMB(T,V2); SET_COMC(T,V3); }while(0)
// Runtime (see Temperature::set_pwm_duty)
// Runtime (see set_pwm_duty)
#define _SET_COMnQ(TCCRnQ, Q, V) do{ \
(*(TCCRnQ)[0] = (*(TCCRnQ)[0] & ~(0x3 << (6-2*(Q)))) | (int(V) << (6-2*(Q)))); \
}while(0)
// Set OCRnQ register
// Runtime (see Temperature::set_pwm_duty):
// Runtime (see set_pwm_duty):
#define _SET_OCRnQ(OCRnQ, Q, V) do{ \
(*(OCRnQ)[(Q)] = (0x0000) | (int(V) & 0xFFFF)); \
}while(0)
// Set ICRn register (one per timer)
// Runtime (see Temperature::set_pwm_frequency)
// Runtime (see set_pwm_frequency)
#define _SET_ICRn(ICRn, V) do{ \
(*(ICRn) = (0x0000) | (int(V) & 0xFFFF)); \
}while(0)

4
Marlin/src/HAL/HAL_DUE/SanityCheck.h
View File

@ -50,3 +50,7 @@
#error "DUE software SPI is required but is incompatible with TMC2130 hardware SPI. Enable TMC_USE_SW_SPI to fix."
#endif
#endif
#if ENABLED(FAST_PWM_FAN)
#error "FAST_PWM_FAN is not yet implemented for this platform."
#endif

4
Marlin/src/HAL/HAL_ESP32/SanityCheck.h
View File

@ -23,3 +23,7 @@
#if ENABLED(EMERGENCY_PARSER)
#error "EMERGENCY_PARSER is not yet implemented for ESP32. Disable EMERGENCY_PARSER to continue."
#endif
#if ENABLED(FAST_PWM_FAN)
#error "FAST_PWM_FAN is not yet implemented for this platform."
#endif

4
Marlin/src/HAL/HAL_LINUX/SanityCheck.h
View File

@ -65,3 +65,7 @@
#endif
#endif
#endif // SPINDLE_LASER_ENABLE
#if ENABLED(FAST_PWM_FAN)
#error "FAST_PWM_FAN is not yet implemented for this platform."
#endif

16
Marlin/src/HAL/HAL_LPC1768/HAL.h
View File

@ -157,3 +157,19 @@ void HAL_idletask(void);
#define PLATFORM_M997_SUPPORT
void flashFirmware(int16_t value);
/**
* set_pwm_frequency
* Set the frequency of the timer corresponding to the provided pin
* All Hardware PWM pins run at the same frequency and all
* Software 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);

40
Marlin/src/HAL/HAL_LPC1768/fast_pwm.cpp Normal file
View File

@ -0,0 +1,40 @@
/**
* Marlin 3D Printer Firmware
* Copyright (C) 2019 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 <http://www.gnu.org/licenses/>.
*
*/
#ifdef TARGET_LPC1768
#include "../../inc/MarlinConfigPre.h"
#if ENABLED(FAST_PWM_FAN)
#include <pwm.h>
void set_pwm_frequency(const pin_t pin, int f_desired) {
pwm_set_frequency(pin, f_desired);
}
void set_pwm_duty(const pin_t pin, const uint16_t v, const uint16_t v_size/*=255*/, const bool invert/*=false*/) {
pwm_write_ratio(pin, invert ? 1.0f - (float)v / v_size : (float)v / v_size);
}
#endif // FAST_PWM_FAN
#endif // TARGET_LPC1768

4
Marlin/src/HAL/HAL_STM32/SanityCheck.h
View File

@ -69,3 +69,7 @@
#if ENABLED(EMERGENCY_PARSER)
#error "EMERGENCY_PARSER is not yet implemented for STM32. Disable EMERGENCY_PARSER to continue."
#endif
#if ENABLED(FAST_PWM_FAN)
#error "FAST_PWM_FAN is not yet implemented for this platform."
#endif

4
Marlin/src/HAL/HAL_STM32F1/SanityCheck.h
View File

@ -74,3 +74,7 @@
#if ENABLED(SDIO_SUPPORT) && DISABLED(SDSUPPORT)
#error "SDIO_SUPPORT requires SDSUPPORT. Enable SDSUPPORT to continue."
#endif
#if ENABLED(FAST_PWM_FAN)
#error "FAST_PWM_FAN is not yet implemented for this platform."
#endif

4
Marlin/src/HAL/HAL_STM32F4/SanityCheck.h
View File

@ -68,3 +68,7 @@
#if ENABLED(EMERGENCY_PARSER)
#error "EMERGENCY_PARSER is not yet implemented for STM32F4. Disable EMERGENCY_PARSER to continue."
#endif
#if ENABLED(FAST_PWM_FAN)
#error "FAST_PWM_FAN is not yet implemented for this platform."
#endif

4
Marlin/src/HAL/HAL_STM32F7/SanityCheck.h
View File

@ -70,3 +70,7 @@
#if ENABLED(EMERGENCY_PARSER)
#error "EMERGENCY_PARSER is not yet implemented for STM32F7. Disable EMERGENCY_PARSER to continue."
#endif
#if ENABLED(FAST_PWM_FAN)
#error "FAST_PWM_FAN is not yet implemented for this platform."
#endif

4
Marlin/src/HAL/HAL_TEENSY31_32/SanityCheck.h
View File

@ -27,3 +27,7 @@
#if ENABLED(EMERGENCY_PARSER)
#error "EMERGENCY_PARSER is not yet implemented for Teensy 3.1/3.2. Disable EMERGENCY_PARSER to continue."
#endif
#if ENABLED(FAST_PWM_FAN)
#error "FAST_PWM_FAN is not yet implemented for this platform."
#endif

4
Marlin/src/HAL/HAL_TEENSY35_36/SanityCheck.h
View File

@ -27,3 +27,7 @@
#if ENABLED(EMERGENCY_PARSER)
#error "EMERGENCY_PARSER is not yet implemented for Teensy 3.5/3.6. Disable EMERGENCY_PARSER to continue."
#endif
#if ENABLED(FAST_PWM_FAN)
#error "FAST_PWM_FAN is not yet implemented for this platform."
#endif

4
Marlin/src/inc/SanityCheck.h
View File

@ -2015,10 +2015,6 @@ static_assert( _ARR_TEST(3,0) && _ARR_TEST(3,1) && _ARR_TEST(3,2)
#error "POWER_LOSS_RECOVERY currently requires an LCD Controller."
#endif
#if ENABLED(FAST_PWM_FAN) && !(defined(ARDUINO) && !defined(ARDUINO_ARCH_SAM))
#error "FAST_PWM_FAN is only supported for ARDUINO and ARDUINO_ARCH_SAM."
#endif
#if ENABLED(Z_STEPPER_AUTO_ALIGN)
#if !Z_MULTI_STEPPER_DRIVERS
#error "Z_STEPPER_AUTO_ALIGN requires Z_DUAL_STEPPER_DRIVERS or Z_TRIPLE_STEPPER_DRIVERS."

6
Marlin/src/module/planner.cpp
View File

@ -1278,13 +1278,13 @@ void Planner::check_axes_activity() {
#elif ENABLED(FAST_PWM_FAN)
#if HAS_FAN0
thermalManager.set_pwm_duty(FAN_PIN, CALC_FAN_SPEED(0));
set_pwm_duty(FAN_PIN, CALC_FAN_SPEED(0));
#endif
#if HAS_FAN1
thermalManager.set_pwm_duty(FAN1_PIN, CALC_FAN_SPEED(1));
set_pwm_duty(FAN1_PIN, CALC_FAN_SPEED(1));
#endif
#if HAS_FAN2
thermalManager.set_pwm_duty(FAN2_PIN, CALC_FAN_SPEED(2));
set_pwm_duty(FAN2_PIN, CALC_FAN_SPEED(2));
#endif
#else

231
Marlin/src/module/temperature.cpp
View File

@ -1544,237 +1544,6 @@ void Temperature::init() {
#endif
}
#if ENABLED(FAST_PWM_FAN)
Temperature::Timer Temperature::get_pwm_timer(pin_t pin) {
#if defined(ARDUINO) && !defined(ARDUINO_ARCH_SAM)
uint8_t q = 0;
switch (digitalPinToTimer(pin)) {
// Protect reserved timers (TIMER0 & TIMER1)
#ifdef TCCR0A
#if !AVR_AT90USB1286_FAMILY
case TIMER0A:
#endif
case TIMER0B:
#endif
#ifdef TCCR1A
case TIMER1A: case TIMER1B:
#endif
break;
#if defined(TCCR2) || defined(TCCR2A)
#ifdef TCCR2
case TIMER2: {
Temperature::Timer timer = {
/*TCCRnQ*/ { &TCCR2, NULL, NULL},
/*OCRnQ*/ { (uint16_t*)&OCR2, NULL, NULL},
/*ICRn*/ NULL,
/*n, q*/ 2, 0
};
}
#elif defined TCCR2A
#if ENABLED(USE_OCR2A_AS_TOP)
case TIMER2A: break; // protect TIMER2A
case TIMER2B: {
Temperature::Timer timer = {
/*TCCRnQ*/ { &TCCR2A, &TCCR2B, NULL},
/*OCRnQ*/ { (uint16_t*)&OCR2A, (uint16_t*)&OCR2B, NULL},
/*ICRn*/ NULL,
/*n, q*/ 2, 1
};
return timer;
}
#else
case TIMER2B: q += 1;
case TIMER2A: {
Temperature::Timer timer = {
/*TCCRnQ*/ { &TCCR2A, &TCCR2B, NULL},
/*OCRnQ*/ { (uint16_t*)&OCR2A, (uint16_t*)&OCR2B, NULL},
/*ICRn*/ NULL,
2, q
};
return timer;
}
#endif
#endif
#endif
#ifdef TCCR3A
case TIMER3C: q += 1;
case TIMER3B: q += 1;
case TIMER3A: {
Temperature::Timer timer = {
/*TCCRnQ*/ { &TCCR3A, &TCCR3B, &TCCR3C},
/*OCRnQ*/ { &OCR3A, &OCR3B, &OCR3C},
/*ICRn*/ &ICR3,
/*n, q*/ 3, q
};
return timer;
}
#endif
#ifdef TCCR4A
case TIMER4C: q += 1;
case TIMER4B: q += 1;
case TIMER4A: {
Temperature::Timer timer = {
/*TCCRnQ*/ { &TCCR4A, &TCCR4B, &TCCR4C},
/*OCRnQ*/ { &OCR4A, &OCR4B, &OCR4C},
/*ICRn*/ &ICR4,
/*n, q*/ 4, q
};
return timer;
}
#endif
#ifdef TCCR5A
case TIMER5C: q += 1;
case TIMER5B: q += 1;
case TIMER5A: {
Temperature::Timer timer = {
/*TCCRnQ*/ { &TCCR5A, &TCCR5B, &TCCR5C},
/*OCRnQ*/ { &OCR5A, &OCR5B, &OCR5C },
/*ICRn*/ &ICR5,
/*n, q*/ 5, q
};
return timer;
}
#endif
}
Temperature::Timer timer = {
/*TCCRnQ*/ { NULL, NULL, NULL},
/*OCRnQ*/ { NULL, NULL, NULL},
/*ICRn*/ NULL,
0, 0
};
return timer;
#endif // ARDUINO && !ARDUINO_ARCH_SAM
}
void Temperature::set_pwm_frequency(const pin_t pin, int f_desired) {
#if defined(ARDUINO) && !defined(ARDUINO_ARCH_SAM)
Temperature::Timer timer = get_pwm_timer(pin);
if (timer.n == 0) return; // Don't proceed if protected timer or not recognised
uint16_t size;
if (timer.n == 2) size = 255; else size = 65535;
uint16_t res = 255; // resolution (TOP value)
uint8_t j = 0; // prescaler index
uint8_t wgm = 1; // waveform generation mode
// Calculating the prescaler and resolution to use to achieve closest frequency
if (f_desired != 0) {
int f = F_CPU/(2*1024*size) + 1; // Initialize frequency as lowest (non-zero) achievable
uint16_t prescaler[] = {0, 1, 8, /*TIMER2 ONLY*/32, 64, /*TIMER2 ONLY*/128, 256, 1024};
// loop over prescaler values
for (uint8_t i = 1; i < 8; i++) {
uint16_t res_temp_fast = 255, res_temp_phase_correct = 255;
if (timer.n == 2) {
// No resolution calculation for TIMER2 unless enabled USE_OCR2A_AS_TOP
#if ENABLED(USE_OCR2A_AS_TOP)
res_temp_fast = (F_CPU / (prescaler[i] * f_desired)) - 1;
res_temp_phase_correct = F_CPU / (2 * prescaler[i] * f_desired);
#endif
}
else {
// Skip TIMER2 specific prescalers when not TIMER2
if (i == 3 || i == 5) continue;
res_temp_fast = (F_CPU / (prescaler[i] * f_desired)) - 1;
res_temp_phase_correct = F_CPU / (2 * prescaler[i] * f_desired);
}
LIMIT(res_temp_fast, 1u, size);
LIMIT(res_temp_phase_correct, 1u, size);
// Calculate frequncies of test prescaler and resolution values
int f_temp_fast = F_CPU / (prescaler[i] * (1 + res_temp_fast));
int f_temp_phase_correct = F_CPU / (2 * prescaler[i] * res_temp_phase_correct);
// If FAST values are closest to desired f
if (ABS(f_temp_fast - f_desired) < ABS(f - f_desired)
&& ABS(f_temp_fast - f_desired) <= ABS(f_temp_phase_correct - f_desired)) {
// Remember this combination
f = f_temp_fast;
res = res_temp_fast;
j = i;
// Set the Wave Generation Mode to FAST PWM
if(timer.n == 2){
wgm =
#if ENABLED(USE_OCR2A_AS_TOP)
WGM2_FAST_PWM_OCR2A;
#else
WGM2_FAST_PWM;
#endif
}
else wgm = WGM_FAST_PWM_ICRn;
}
// If PHASE CORRECT values are closes to desired f
else if (ABS(f_temp_phase_correct - f_desired) < ABS(f - f_desired)) {
f = f_temp_phase_correct;
res = res_temp_phase_correct;
j = i;
// Set the Wave Generation Mode to PWM PHASE CORRECT
if (timer.n == 2) {
wgm =
#if ENABLED(USE_OCR2A_AS_TOP)
WGM2_PWM_PC_OCR2A;
#else
WGM2_PWM_PC;
#endif
}
else wgm = WGM_PWM_PC_ICRn;
}
}
}
_SET_WGMnQ(timer.TCCRnQ, wgm);
_SET_CSn(timer.TCCRnQ, j);
if (timer.n == 2) {
#if ENABLED(USE_OCR2A_AS_TOP)
_SET_OCRnQ(timer.OCRnQ, 0, res); // Set OCR2A value (TOP) = res
#endif
}
else {
_SET_ICRn(timer.ICRn, res); // Set ICRn value (TOP) = res
}
#endif // ARDUINO && !ARDUINO_ARCH_SAM
}
void Temperature::set_pwm_duty(const pin_t pin, const uint16_t v, const uint16_t v_size/*=255*/, const bool invert/*=false*/) {
#if defined(ARDUINO) && !defined(ARDUINO_ARCH_SAM)
// If v is 0 or v_size (max), digitalWrite to LOW or HIGH.
// Note that digitalWrite also disables pwm output for us (sets COM bit to 0)
if (v == 0)
digitalWrite(pin, invert);
else if (v == v_size)
digitalWrite(pin, !invert);
else {
Temperature::Timer timer = get_pwm_timer(pin);
if (timer.n == 0) return; // Don't proceed if protected timer or not recognised
// Set compare output mode to CLEAR -> SET or SET -> CLEAR (if inverted)
_SET_COMnQ(timer.TCCRnQ, timer.q
#ifdef TCCR2
+ (timer.q == 2) // COM20 is on bit 4 of TCCR2, thus requires q + 1 in the macro
#endif
, COM_CLEAR_SET + invert
);
uint16_t top;
if (timer.n == 2) { // if TIMER2
top =
#if ENABLED(USE_OCR2A_AS_TOP)
*timer.OCRnQ[0] // top = OCR2A
#else
255 // top = 0xFF (max)
#endif
;
}
else
top = *timer.ICRn; // top = ICRn
_SET_OCRnQ(timer.OCRnQ, timer.q, v * float(top / v_size)); // Scale 8/16-bit v to top value
}
#endif // ARDUINO && !ARDUINO_ARCH_SAM
}
#endif // FAST_PWM_FAN
#if WATCH_HOTENDS
/**
* Start Heating Sanity Check for hotends that are below

41
Marlin/src/module/temperature.h
View File

@ -266,16 +266,6 @@ class Temperature {
soft_pwm_count_fan[FAN_COUNT];
#endif
/**
* set_pwm_duty (8-bit AVRs only)
* Sets 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]
*/
#if ENABLED(FAST_PWM_FAN)
static void set_pwm_duty(const pin_t pin, const uint16_t v, const uint16_t v_size=255, const bool invert=false);
#endif
#if ENABLED(BABYSTEPPING)
static volatile int16_t babystepsTodo[3];
#endif
@ -744,38 +734,7 @@ class Temperature {
#endif
private:
/**
* (8-bit AVRs only)
*
* get_pwm_timer
* Grabs timer information and registers of the provided pin
* returns Timer struct containing this information
* Used by set_pwm_frequency, set_pwm_duty
*
* set_pwm_frequency
* Sets the frequency of the timer corresponding to the provided pin
* as close as possible to the provided desired frequency. Internally
* calculates the required waveform generation mode, prescaler and
* resolution values required and sets the timer registers accordingly.
* NOTE that the frequency is applied to all pins on the timer (Ex OC3A, OC3B and OC3B)
* NOTE that there are limitations, particularly if using TIMER2. (see Configuration_adv.h -> FAST FAN PWM Settings)
*/
#if ENABLED(FAST_PWM_FAN)
typedef struct Timer {
volatile uint8_t* TCCRnQ[3]; // max 3 TCCR registers per timer
volatile uint16_t* OCRnQ[3]; // max 3 OCR registers per timer
volatile uint16_t* ICRn; // max 1 ICR register per timer
uint8_t n; // the timer number [0->5]
uint8_t q; // the timer output [0->2] (A->C)
} Timer;
static Timer get_pwm_timer(const pin_t pin);
static void set_pwm_frequency(const pin_t pin, int f_desired);
#endif
static void set_current_temp_raw();
static void updateTemperaturesFromRawValues();
#define HAS_MAX6675 EITHER(HEATER_0_USES_MAX6675, HEATER_1_USES_MAX6675)