Add 1-PWM support to esp32 LEDC driver

Author: Richard Unger

src/drivers/hardware_specific/esp32_ledc_mcu.cpp

@@ -53,6 +53,33 @@ void _setHighFrequency(const long freq, const int pin, const int channel){
 
 
 
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+
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+void* _configure1PWM(long pwm_frequency, const int pinA) {
+  if(!pwm_frequency || !_isset(pwm_frequency) ) pwm_frequency = _PWM_FREQUENCY; // default frequency 25khz
+  else pwm_frequency = _constrain(pwm_frequency, 0, _PWM_FREQUENCY_MAX); // constrain to 50kHz max
+
+  // check if enough channels available
+  if ( channel_index + 1 >= LEDC_CHANNELS ) return SIMPLEFOC_DRIVER_INIT_FAILED;
+
+  int ch1 = channel_index++;
+  _setHighFrequency(pwm_frequency, pinA, ch1);
+
+  ESP32LEDCDriverParams* params = new ESP32LEDCDriverParams {
+    .channels = { ch1 },
+    .pwm_frequency = pwm_frequency
+  };
+  return params;
+}
+
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+
 void* _configure2PWM(long pwm_frequency, const int pinA, const int pinB) {
   if(!pwm_frequency || !_isset(pwm_frequency) ) pwm_frequency = _PWM_FREQUENCY; // default frequency 25khz
   else pwm_frequency = _constrain(pwm_frequency, 0, _PWM_FREQUENCY_MAX); // constrain to 50kHz max
@@ -123,6 +150,12 @@ void* _configure4PWM(long pwm_frequency,const int pinA, const int pinB, const in
 
 
 
+void _writeDutyCycle1PWM(float dc_a, void* params){
+  ledcWrite(((ESP32LEDCDriverParams*)params)->channels[0], _constrain(_PWM_RES*dc_a, 0, _PWM_RES));
+}
+
+
+
 void _writeDutyCycle2PWM(float dc_a,  float dc_b, void* params){
   ledcWrite(((ESP32LEDCDriverParams*)params)->channels[0], _constrain(_PWM_RES*dc_a, 0, _PWM_RES));
   ledcWrite(((ESP32LEDCDriverParams*)params)->channels[1], _constrain(_PWM_RES*dc_b, 0, _PWM_RES));