Merge pull request arduino#154 from adafruit/hallowings

hallowing m4 final UART fix

Author: ladyada

variants/hallowing_m4/variant.cpp

@@ -26,8 +26,8 @@ const PinDescription g_APinDescription[]=
   // 0..13 - Digital pins
   // ----------------------
   // 0/1 - SERCOM/UART (Serial1)
-  { PORTB, 13, PIO_SERCOM, PIN_ATTR_DIGITAL, No_ADC_Channel, NOT_ON_PWM, NOT_ON_TIMER, EXTERNAL_INT_13 },  // TX SERCOM 4.1
-  { PORTB, 12, PIO_SERCOM, PIN_ATTR_DIGITAL, No_ADC_Channel, NOT_ON_PWM, NOT_ON_TIMER, EXTERNAL_INT_12 },  // RX SERCOM 4.0
+  { PORTB, 12, PIO_SERCOM, PIN_ATTR_DIGITAL, No_ADC_Channel, NOT_ON_PWM, NOT_ON_TIMER, EXTERNAL_INT_12 },  // TX SERCOM 4.0
+  { PORTB, 13, PIO_SERCOM, PIN_ATTR_DIGITAL, No_ADC_Channel, NOT_ON_PWM, NOT_ON_TIMER, EXTERNAL_INT_13 },  // RX SERCOM 4.1
 
   // 2..12
   // Digital Low
@@ -36,7 +36,7 @@ const PinDescription g_APinDescription[]=
   { PORTA,  14, PIO_DIGITAL, PIN_ATTR_PWM_E, No_ADC_Channel, TC3_CH0, TC3_CH0, EXTERNAL_INT_14 }, // D4
   { PORTA,  16, PIO_DIGITAL, PIN_ATTR_DIGITAL, No_ADC_Channel, NOT_ON_PWM, NOT_ON_TIMER, EXTERNAL_INT_0  }, // D5
   { PORTA, 17, PIO_DIGITAL, (PIN_ATTR_DIGITAL), No_ADC_Channel, NOT_ON_PWM, NOT_ON_TIMER, EXTERNAL_INT_1 }, // D6 
-  { PORTB,  14, PIO_DIGITAL, PIN_ATTR_PWM_F, No_ADC_Channel, TCC4_CH0, TC5_CH0, EXTERNAL_INT_14 }, // D7 (LISIRQ)
+  { PORTB,  15, PIO_DIGITAL, PIN_ATTR_PWM_F, No_ADC_Channel, TCC4_CH0, TC5_CH0, EXTERNAL_INT_15 }, // D7 (LISIRQ)
 
   // Digital High
 
@@ -109,7 +109,7 @@ const PinDescription g_APinDescription[]=
   { PORTB, 31, PIO_DIGITAL, PIN_ATTR_DIGITAL, No_ADC_Channel, NOT_ON_PWM, NOT_ON_TIMER, EXTERNAL_INT_15 }, // D45 TFT DC
   { PORTB, 30, PIO_DIGITAL, PIN_ATTR_DIGITAL, No_ADC_Channel, NOT_ON_PWM, NOT_ON_TIMER, EXTERNAL_INT_14 }, // D46 TFT RST
 
-  { PORTB, 14, PIO_DIGITAL, PIN_ATTR_DIGITAL, No_ADC_Channel, NOT_ON_PWM, NOT_ON_TIMER, EXTERNAL_INT_15 },  // D47 Backlight (not connected rev B)
+  { PORTB, 14, PIO_DIGITAL, PIN_ATTR_PWM_G, No_ADC_Channel, TCC0_CH2, NOT_ON_TIMER, EXTERNAL_INT_15 },  // D47 Backlight (not connected rev B)
 
 
   { PORTA, 15, PIO_DIGITAL, PIN_ATTR_PWM_E, No_ADC_Channel, NOT_ON_PWM, NOT_ON_TIMER, EXTERNAL_INT_15  }, // D48 - Cap Pin