add second Wire

Author: ladyada

variants/trellis_m4/variant.cpp

@@ -26,8 +26,8 @@ const PinDescription g_APinDescription[]=
   // 0..13 - Digital pins
   // ----------------------
   // 0/1 - SERCOM/UART (Serial1)
-  { PORTA,  12, PIO_SERCOM_ALT, (PIN_ATTR_DIGITAL|PIN_ATTR_PWM|PIN_ATTR_TIMER_ALT), No_ADC_Channel, PWM0_CH6, TCC0_CH6, EXTERNAL_INT_12 }, // SERCOM 2.0
-  { PORTA,  13, PIO_SERCOM_ALT, (PIN_ATTR_DIGITAL|PIN_ATTR_PWM|PIN_ATTR_TIMER_ALT), No_ADC_Channel, PWM0_CH7, TCC0_CH7, EXTERNAL_INT_13 }, // SERCOM 2.1
+  { PORTA,  12, PIO_SERCOM, (PIN_ATTR_DIGITAL|PIN_ATTR_PWM|PIN_ATTR_TIMER_ALT), No_ADC_Channel, PWM0_CH6, TCC0_CH6, EXTERNAL_INT_12 }, // SERCOM 2.0
+  { PORTA,  13, PIO_SERCOM, (PIN_ATTR_DIGITAL|PIN_ATTR_PWM|PIN_ATTR_TIMER_ALT), No_ADC_Channel, PWM0_CH7, TCC0_CH7, EXTERNAL_INT_13 }, // SERCOM 2.1
 
   // 2..9 - columns
   { PORTA,  14, PIO_DIGITAL, (PIN_ATTR_DIGITAL|PIN_ATTR_PWM|PIN_ATTR_TIMER), No_ADC_Channel, PWM1_CH2, TCC1_CH2, EXTERNAL_INT_14 }, // D4
@@ -90,7 +90,6 @@ const PinDescription g_APinDescription[]=
   { PORTA, 31, PIO_SERCOM_ALT, PIN_ATTR_NONE, No_ADC_Channel, NOT_ON_PWM, NOT_ON_TIMER, EXTERNAL_INT_15 },
 
   // Unused
-
   { PORTB,  2, PIO_ANALOG, PIN_ATTR_ANALOG, ADC_Channel14, NOT_ON_PWM, NOT_ON_TIMER, EXTERNAL_INT_2 },
   { PORTB,  3, PIO_ANALOG, PIN_ATTR_ANALOG, ADC_Channel15, NOT_ON_PWM, NOT_ON_TIMER, EXTERNAL_INT_3 }, 
   { PORTB,  8, PIO_ANALOG, PIN_ATTR_ANALOG, ADC_Channel2, NOT_ON_PWM, NOT_ON_TIMER, EXTERNAL_INT_8 },

variants/trellis_m4/variant.h

@@ -141,17 +141,23 @@ static const uint8_t SCK  = PIN_SPI_SCK ;
 /*
  * Wire Interfaces
  */
-#define WIRE_INTERFACES_COUNT 1
+#define WIRE_INTERFACES_COUNT 2
 
 #define PIN_WIRE_SDA         (21u)
 #define PIN_WIRE_SCL         (22u)
 #define PERIPH_WIRE          sercom4
 #define WIRE_IT_HANDLER      SERCOM4_Handler
-
-
 static const uint8_t SDA = PIN_WIRE_SDA;
 static const uint8_t SCL = PIN_WIRE_SCL;
 
+
+#define PIN_WIRE1_SDA         (0u)
+#define PIN_WIRE1_SCL         (1u)
+#define PERIPH_WIRE1          sercom2
+#define WIRE1_IT_HANDLER      SERCOM2_Handler
+static const uint8_t SDA1 = PIN_WIRE_SDA;
+static const uint8_t SCL1 = PIN_WIRE_SCL;
+
 /*
  * USB
  */