getPWM added

Author: hoffmannjan

Adafruit_PWMServoDriver.cpp

@@ -158,6 +158,15 @@ void Adafruit_PWMServoDriver::setPWMFreq(float freq) {
 #endif
 }
 
+/*!
+ *  @brief  Gets the PWM output of one of the PCA9685 pins
+ *  @param  num One of the PWM output pins, from 0 to 15
+ */
+void Adafruit_PWMServoDriver::getPWM(uint8_t num) {
+  _i2c->requestFrom((uint8_t)_i2caddr, LED0_ON_L + 4 * num, 4)
+  return _i2c->read();
+}
+
 /*!
  *  @brief  Sets the PWM output of one of the PCA9685 pins
  *  @param  num One of the PWM output pins, from 0 to 15

Adafruit_PWMServoDriver.h

@@ -55,6 +55,7 @@ class Adafruit_PWMServoDriver {
   void wakeup();
   void setExtClk(uint8_t prescale);
   void setPWMFreq(float freq);
+  void getPWM(uint8_t num);
   void setPWM(uint8_t num, uint16_t on, uint16_t off);
   void setPin(uint8_t num, uint16_t val, bool invert=false);