feather_m4_can: Add CAN-related pins to variant files

40: CAN_STANDBY
41: CAN_TX
42: CAN_RX

Author: jepler

variants/feather_m4_can/variant.cpp

@@ -29,7 +29,7 @@
 //TC2 IOSET 2
 //TC3 IOSET 1
 //TC4 IOSET 1
-const PinDescription g_APinDescription[]=
+const PinDescription g_APinDescription[PINS_COUNT]=
 {
   // 0..13 - Digital pins
   // ----------------------
@@ -107,6 +107,12 @@ const PinDescription g_APinDescription[]=
   { PORTA, 9, PIO_COM, PIN_ATTR_NONE, No_ADC_Channel, NOT_ON_PWM, NOT_ON_TIMER, EXTERNAL_INT_NONE },
   { PORTA, 10, PIO_COM, PIN_ATTR_NONE, No_ADC_Channel, NOT_ON_PWM, NOT_ON_TIMER, EXTERNAL_INT_NONE },
   { 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)
+  { 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 },
 } ;
 
 const void* g_apTCInstances[TCC_INST_NUM+TC_INST_NUM]={ TCC0, TCC1, TCC2, TCC3, TCC4, TC0, TC1, TC2, TC3, TC4, TC5 } ;

variants/feather_m4_can/variant.h

@@ -57,8 +57,8 @@ extern "C"
  *----------------------------------------------------------------------------*/
 
 // Number of pins defined in PinDescription array
-#define PINS_COUNT           (40u)
-#define NUM_DIGITAL_PINS     (20u)
+#define PINS_COUNT           (43u)
+#define NUM_DIGITAL_PINS     (23u)
 #define NUM_ANALOG_INPUTS    (6u)
 #define NUM_ANALOG_OUTPUTS   (1u)
 #define analogInputToDigitalPin(p)  ((p < 6u) ? (p) + 14u : -1)