add boost enable pin for CAN feather

Author: ladyada

variants/feather_m4_can/variant.cpp

@@ -51,10 +51,10 @@ const PinDescription g_APinDescription[PINS_COUNT]=
   { PORTA,  19, PIO_TIMER_ALT, PIN_ATTR_PWM_F, No_ADC_Channel, TCC1_CH3, TC3_CH1, EXTERNAL_INT_3 },
   { PORTA,  20, PIO_TIMER_ALT, PIN_ATTR_PWM_G, No_ADC_Channel, TCC0_CH0, NOT_ON_TIMER, EXTERNAL_INT_4 },
   { PORTA, 21, PIO_DIGITAL, PIN_ATTR_PWM_G, No_ADC_Channel, TCC0_CH1, NOT_ON_TIMER, EXTERNAL_INT_5 },
-  { PORTA, 22, PIO_DIGITAL, PIN_ATTR_PWM_G, No_ADC_Channel, TCC0_CH2, NOT_ON_TIMER, EXTERNAL_INT_6 },
+  { PORTA, 22, PIO_DIGITAL, PIN_ATTR_PWM_G, No_ADC_Channel, TCC0_CH2, NOT_ON_TIMER, EXTERNAL_INT_6 }, // CAN TX
 
   // 13 (LED)
-  { PORTA, 23, PIO_DIGITAL, PIN_ATTR_PWM_G, No_ADC_Channel, TCC0_CH3, TC4_CH1, EXTERNAL_INT_7 }, // TCC2/WO[1]
+  { PORTA, 23, PIO_DIGITAL, PIN_ATTR_PWM_G, No_ADC_Channel, TCC0_CH3, TC4_CH1, EXTERNAL_INT_7 }, // CAN RX
 
   // 14..19 - Analog pins
   // --------------------
@@ -109,7 +109,8 @@ const PinDescription g_APinDescription[PINS_COUNT]=
   { PORTA, 11, PIO_COM, PIN_ATTR_NONE, No_ADC_Channel, NOT_ON_PWM, NOT_ON_TIMER, EXTERNAL_INT_NONE },
 
   // ----------------------
-  // 40..42 CAN (STANDBY, TX, RX)
+  // 40..43 CAN (STANDBY, BOOST, TX, RX)
+  { PORTB, 12, PIO_DIGITAL, PIN_ATTR_NONE, No_ADC_Channel, NOT_ON_PWM, NOT_ON_TIMER, EXTERNAL_INT_NONE },
   { PORTB, 13, PIO_DIGITAL, PIN_ATTR_NONE, No_ADC_Channel, NOT_ON_PWM, NOT_ON_TIMER, EXTERNAL_INT_NONE },
   { PORTB, 14, PIO_COM, PIN_ATTR_NONE, No_ADC_Channel, NOT_ON_PWM, NOT_ON_TIMER, EXTERNAL_INT_NONE },
   { PORTB, 15, PIO_COM, PIN_ATTR_NONE, No_ADC_Channel, NOT_ON_PWM, NOT_ON_TIMER, EXTERNAL_INT_NONE },

variants/feather_m4_can/variant.h

@@ -57,7 +57,7 @@ extern "C"
  *----------------------------------------------------------------------------*/
 
 // Number of pins defined in PinDescription array
-#define PINS_COUNT           (43u)
+#define PINS_COUNT           (44u)
 #define NUM_DIGITAL_PINS     (23u)
 #define NUM_ANALOG_INPUTS    (6u)
 #define NUM_ANALOG_OUTPUTS   (1u)
@@ -206,9 +206,14 @@ static const uint8_t SCL = PIN_WIRE_SCL;
 /*
  * CAN
  */
-#define PIN_CAN_RX      (42)
 #define PIN_CAN_STANDBY (40)
-#define PIN_CAN_TX      (41)
+#define PIN_CAN_BOOSTEN (41)
+#define PIN_CAN_TX      (42)
+#define PIN_CAN_RX      (43)
+
+#define PIN_CAN1_TX     (12)
+#define PIN_CAN1_RX     (13)
+
 
 #ifdef __cplusplus
 }