PWM proposal

This commit enables PWM on pin 11 instead of pin A4 on MKR1000 improving UNO pinout compatibility

variants/mkr1000/variant.cpp

@@ -71,7 +71,7 @@ const PinDescription g_APinDescription[] = {
   { PORTA, 19, PIO_SERCOM,  (PIN_ATTR_DIGITAL|PIN_ATTR_PWM|PIN_ATTR_TIMER    ), No_ADC_Channel, PWM3_CH1,   TC3_CH1,      EXTERNAL_INT_NONE }, // MISO: SERCOM1/PAD[3]
 
                                                                                                                                                // PINOUT=0
-  { PORTA,  8, PIO_SERCOM,  (PIN_ATTR_DIGITAL                                ), ADC_Channel16,  NOT_ON_PWM, NOT_ON_TIMER, EXTERNAL_INT_NMI  }, // SDA:  SERCOM0/PAD[0]
+  { PORTA,  8, PIO_SERCOM,  (PIN_ATTR_DIGITAL|PIN_ATTR_PWM|PIN_ATTR_TIMER    ), ADC_Channel16,  PWM0_CH0, TCC0_CH0, EXTERNAL_INT_NMI  }, // SDA:  SERCOM0/PAD[0]
   { PORTA,  9, PIO_SERCOM,  (PIN_ATTR_DIGITAL                                ), ADC_Channel17,  NOT_ON_PWM, NOT_ON_TIMER, EXTERNAL_INT_NONE }, // SCL:  SERCOM0/PAD[1]
 
                                                                                                                                                // RXPO=3 TXPO=1
@@ -97,7 +97,7 @@ const PinDescription g_APinDescription[] = {
   { PORTA,  2, PIO_ANALOG,  (PIN_ATTR_DIGITAL|PIN_ATTR_ANALOG /*DAC*/        ), ADC_Channel0,   NOT_ON_PWM, NOT_ON_TIMER, EXTERNAL_INT_NONE },
   { PORTB,  2, PIO_ANALOG,  (PIN_ATTR_DIGITAL                                ), ADC_Channel10,  NOT_ON_PWM, NOT_ON_TIMER, EXTERNAL_INT_2    },
   { PORTB,  3, PIO_ANALOG,  (PIN_ATTR_DIGITAL                                ), ADC_Channel11,  NOT_ON_PWM, NOT_ON_TIMER, EXTERNAL_INT_3    },
-  { PORTA,  4, PIO_ANALOG,  (PIN_ATTR_DIGITAL|PIN_ATTR_PWM|PIN_ATTR_TIMER    ), ADC_Channel4,   PWM0_CH0,   TCC0_CH0,     EXTERNAL_INT_NONE },
+  { PORTA,  4, PIO_ANALOG,  (PIN_ATTR_DIGITAL                                ), ADC_Channel4,   NOT_ON_PWM,   NOT_ON_TIMER,     EXTERNAL_INT_NONE },
   { PORTA,  5, PIO_ANALOG,  (PIN_ATTR_DIGITAL|PIN_ATTR_PWM|PIN_ATTR_TIMER    ), ADC_Channel5,   PWM0_CH1,   TCC0_CH1,     EXTERNAL_INT_NONE },
   { PORTA,  6, PIO_ANALOG,  (PIN_ATTR_DIGITAL                                ), ADC_Channel6,   NOT_ON_PWM, NOT_ON_TIMER, EXTERNAL_INT_NONE },
   { PORTA,  7, PIO_ANALOG,  (PIN_ATTR_DIGITAL                                ), ADC_Channel7,   NOT_ON_PWM, NOT_ON_TIMER, EXTERNAL_INT_NONE },