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🐛 Fix TFT backlight [STM32] (#23062)

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This commit is contained in:
Tanguy Pruvot 2021-11-04 18:04:04 +01:00 committed by Scott Lahteine
parent 89ec1c71f0
commit fd136d5501
6 changed files with 22 additions and 8 deletions
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4
Marlin/src/HAL/STM32/fast_pwm.cpp
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@ -28,11 +28,13 @@
#include "timers.h"
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; // Don't proceed if no hardware timer
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;

1
Marlin/src/HAL/STM32F1/fast_pwm.cpp
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@ -28,6 +28,7 @@
#include "timers.h"
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 = PIN_MAP[pin].timer_device;
uint16_t max_val = timer->regs.bas->ARR * v / v_size;
if (invert) max_val = v_size - max_val;

4
Marlin/src/lcd/dogm/marlinui_DOGM.cpp
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@ -339,12 +339,14 @@ void MarlinUI::draw_kill_screen() {
void MarlinUI::clear_lcd() { } // Automatically cleared by Picture Loop
#if HAS_LCD_BRIGHTNESS
void MarlinUI::_set_brightness() {
#if PIN_EXISTS(TFT_BACKLIGHT)
if (PWM_PIN(TFT_BACKLIGHT_PIN))
set_pwm_duty(pin_t(TFT_BACKLIGHT_PIN), brightness);
analogWrite(pin_t(TFT_BACKLIGHT_PIN), backlight ? brightness : 0);
#endif
}
#endif
#if HAS_LCD_MENU

4
Marlin/src/lcd/tft/ui_common.cpp
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@ -210,12 +210,14 @@ void MarlinUI::clear_lcd() {
}
#if HAS_LCD_BRIGHTNESS
void MarlinUI::_set_brightness() {
#if PIN_EXISTS(TFT_BACKLIGHT)
if (PWM_PIN(TFT_BACKLIGHT_PIN))
set_pwm_duty(pin_t(TFT_BACKLIGHT_PIN), brightness);
analogWrite(pin_t(TFT_BACKLIGHT_PIN), backlight ? brightness : 0);
#endif
}
#endif
#if ENABLED(TOUCH_SCREEN_CALIBRATION)

3
Marlin/src/lcd/tft_io/tft_io.cpp
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@ -152,8 +152,7 @@ if (lcd_id != 0xFFFFFFFF) return;
#endif
#if PIN_EXISTS(TFT_BACKLIGHT) && ENABLED(DELAYED_BACKLIGHT_INIT)
WRITE(TFT_BACKLIGHT_PIN, HIGH);
TERN_(HAS_LCD_BRIGHTNESS, ui._set_brightness());
TERN(HAS_LCD_BRIGHTNESS, ui._set_brightness(), WRITE(TFT_BACKLIGHT_PIN, HIGH));
#endif
}

8
Marlin/src/pins/stm32f1/pins_LONGER3D_LK.h
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@ -89,9 +89,17 @@
#define HEATER_BED_PIN PA8 // pin 67 (Hot Bed Mosfet)
#define FAN_PIN PA15 // pin 77 (4cm Fan)
#ifdef MAPLE_STM32F1
#define FAN_SOFT_PWM // Required to avoid issues with heating or STLink
#define FAN_MIN_PWM 35 // Fan will not start in 1-30 range
#define FAN_MAX_PWM 255
#else
#define FAST_PWM_FAN // STM32 Variant allow TIMER2 Hardware PWM
#define FAST_PWM_FAN_FREQUENCY 31400 // This frequency allow a good range, fan starts at 3%, half noise at 50%
#define NEEDS_HARDWARE_PWM 1
#define FAN_MIN_PWM 5
#define FAN_MAX_PWM 255
#endif
//#define BEEPER_PIN PD13 // pin 60 (Servo PWM output 5V/GND on Board V0G+) made for BL-Touch sensor
// Can drive a PC Buzzer, if connected between PWM and 5V pins