fix i2c

Author: ladyada

variants/trinket_m0/variant.cpp

@@ -120,8 +120,8 @@ const PinDescription g_APinDescription[]=
   // 2..12
   // Digital Low
   { PORTA, 14, PIO_DIGITAL, (PIN_ATTR_DIGITAL), No_ADC_Channel, NOT_ON_PWM, NOT_ON_TIMER, EXTERNAL_INT_14 },
-  { PORTA,  9, PIO_TIMER, (PIN_ATTR_DIGITAL|PIN_ATTR_PWM|PIN_ATTR_TIMER), No_ADC_Channel, PWM0_CH1, TCC0_CH1, EXTERNAL_INT_9 }, // TCC0/WO[1]
-  { PORTA,  8, PIO_TIMER, (PIN_ATTR_DIGITAL|PIN_ATTR_PWM|PIN_ATTR_TIMER), No_ADC_Channel, PWM0_CH0, TCC0_CH0, EXTERNAL_INT_NMI },  // TCC0/WO[0]
+  { PORTA,  9, PIO_SERCOM_ALT, (PIN_ATTR_DIGITAL|PIN_ATTR_PWM|PIN_ATTR_TIMER), No_ADC_Channel, PWM0_CH1, TCC0_CH1, EXTERNAL_INT_9 }, // TCC0/WO[1]
+  { PORTA,  8, PIO_SERCOM_ALT, (PIN_ATTR_DIGITAL|PIN_ATTR_PWM|PIN_ATTR_TIMER), No_ADC_Channel, PWM0_CH0, TCC0_CH0, EXTERNAL_INT_NMI },  // TCC0/WO[0]
   { PORTA, 15, PIO_TIMER, (PIN_ATTR_DIGITAL|PIN_ATTR_PWM|PIN_ATTR_TIMER), No_ADC_Channel, PWM3_CH1, TC3_CH1, EXTERNAL_INT_15 }, // TC3/WO[1]
   { PORTA, 20, PIO_TIMER_ALT, (PIN_ATTR_DIGITAL|PIN_ATTR_PWM|PIN_ATTR_TIMER_ALT), No_ADC_Channel, PWM0_CH6, TCC0_CH6, EXTERNAL_INT_4 }, // TCC0/WO[6]
   { PORTA, 21, PIO_DIGITAL, (PIN_ATTR_DIGITAL), No_ADC_Channel, NOT_ON_PWM, NOT_ON_TIMER, EXTERNAL_INT_5 },

variants/trinket_m0/variant.h

@@ -132,7 +132,7 @@ static const uint8_t ATN = PIN_ATN;
 #define PIN_SPI_MISO         (3u) // PA09
 #define PIN_SPI_MOSI         (1u) // PA10
 #define PIN_SPI_SCK          (0u) // PA11
-#define PERIPH_SPI           sercom2
+#define PERIPH_SPI           sercom3
 #define PAD_SPI_TX           SPI_PAD_2_SCK_3
 #define PAD_SPI_RX           SERCOM_RX_PAD_1
 
@@ -142,14 +142,15 @@ static const uint8_t MISO = PIN_SPI_MISO ;
 static const uint8_t SCK  = PIN_SPI_SCK ;
 
 /*
- * Wire Interfaces (sercom 2 so can share with sercom 0)
+ * Wire Interfaces (sercom 2 so can share with Serial1 on sercom 0)
  */
 #define WIRE_INTERFACES_COUNT 1
 
 #define PIN_WIRE_SDA         (4u) // PA08
 #define PIN_WIRE_SCL         (3u) // PA09
 #define PERIPH_WIRE          sercom2
 #define WIRE_IT_HANDLER      SERCOM2_Handler
+ 
 
 static const uint8_t SDA = PIN_WIRE_SDA;
 static const uint8_t SCL = PIN_WIRE_SCL;