🍻 STM32 set_pwm_duty "on/off" for digital pins (#23665)

Marlin/src/HAL/STM32/fast_pwm.cpp

@@ -30,7 +30,8 @@
 static uint16_t timer_freq[TIMER_NUM];
 
 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
+  const uint16_t duty = invert ? v_size - v : v;
+  if (PWM_PIN(pin)) {
     const PinName pin_name = digitalPinToPinName(pin);
     TIM_TypeDef * const Instance = (TIM_TypeDef *)pinmap_peripheral(pin_name, PinMap_PWM);
 
@@ -50,10 +51,14 @@ void set_pwm_duty(const pin_t pin, const uint16_t v, const uint16_t v_size/*=255
 
     // Note the resolution is sticky here, the input can be upto 16 bits and that would require RESOLUTION_16B_COMPARE_FORMAT (16)
     // If such a need were to manifest then we would need to calc the resolution based on the v_size parameter and add code for it.
-  const uint16_t value = invert ? v_size - v : v;
-  HT->setCaptureCompare(channel, value, RESOLUTION_8B_COMPARE_FORMAT); // Sets the duty, the calc is done in the library :)
+    HT->setCaptureCompare(channel, duty, RESOLUTION_8B_COMPARE_FORMAT); // Set the duty, the calc is done in the library :)
     pinmap_pinout(pin_name, PinMap_PWM); // Make sure the pin output state is set.
     if (previousMode != TIMER_OUTPUT_COMPARE_PWM1) HT->resume();
+  }
+  else {
+    pinMode(pin, OUTPUT);
+    digitalWrite(pin, duty < v_size / 2 ? LOW : HIGH);
+  }
 }
 
 void set_pwm_frequency(const pin_t pin, const uint16_t f_desired) {

Marlin/src/HAL/STM32F1/fast_pwm.cpp

@@ -39,16 +39,19 @@ inline uint8_t timer_and_index_for_pin(const pin_t pin, timer_dev **timer_ptr) {
 }
 
 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;
-
+  const uint16_t duty = invert ? v_size - v : v;
+  if (PWM_PIN(pin)) {
     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
+  }
+  else {
+    pinMode(pin, OUTPUT);
+    digitalWrite(pin, duty < v_size / 2 ? LOW : HIGH);
+  }
 }
 
 void set_pwm_frequency(const pin_t pin, const uint16_t f_desired) {

buildroot/share/PlatformIO/variants/STM32G0xx/MARLIN_G0B1RE/variant_MARLIN_STM32G0B1RE.h

@@ -150,10 +150,10 @@
 // Timer Definitions
 // Use TIM6/TIM7 when possible as servo and tone don't need GPIO output pin
 #ifndef TIMER_TONE
-  #define TIMER_TONE            TIM6
+  #define TIMER_TONE            TIM6  // TIMER_TONE must be defined in this file
 #endif
 #ifndef TIMER_SERVO
-  #define TIMER_SERVO           TIM7
+  #define TIMER_SERVO           TIM7  // TIMER_SERVO must be defined in this file
 #endif
 
 // UART Definitions