Fix: only one CAN bus connector is exposed on the H7.

aentinger · aentinger · commit f4cad9f119ed · 2023-05-02T13:19:16.000+02:00
Note: The exposed CAN bus is made available as a 'CAN' software object, following
the notion that Arduino IO objects always start without a number. This can be
slightly confusing as the exact same peripheral is labelled CAN1 in the schematics.
diff --git a/variants/PORTENTA_H7_M7/pins_arduino.h b/variants/PORTENTA_H7_M7/pins_arduino.h
@@ -164,12 +164,9 @@ void _ontouch1200bps_();
 
 #define USB_MAX_POWER	(500)
 
-#define CAN_HOWMANY       2
+#define CAN_HOWMANY       1
 
-#define PIN_CAN0_TX       (PB_13)
-#define PIN_CAN0_RX       (PB_5)
-
-#define PIN_CAN1_TX       (PH_13)
-#define PIN_CAN1_RX       (PB_8)
+#define PIN_CAN0_TX       (PH_13) /* Labeled CAN1_TX on high-density connector. */
+#define PIN_CAN0_RX       (PB_8)  /* Labeled CAN1_RX on high-density connector. */
 
 #endif //__PINS_ARDUINO__
diff --git a/variants/PORTENTA_H7_M7/variant.cpp b/variants/PORTENTA_H7_M7/variant.cpp
@@ -78,7 +78,7 @@ PinDescription g_APinDescription[] = {
   { PB_5,         NULL, NULL, NULL },
   { PB_6,         NULL, NULL, NULL },
   { PB_7,         NULL, NULL, NULL },
-  { PB_8,         NULL, NULL, NULL },    // CAN1 RX
+  { PB_8,         NULL, NULL, NULL },    // HD-connector: CAN1_RX -> software object: CAN
   { PB_9,         NULL, NULL, NULL },
   { PB_10,        NULL, NULL, NULL },
   { PB_11,        NULL, NULL, NULL },
@@ -179,7 +179,7 @@ PinDescription g_APinDescription[] = {
   { PH_10,        NULL, NULL, NULL },
   { PH_11,        NULL, NULL, NULL },
   { PH_12,        NULL, NULL, NULL },
-  { PH_13,        NULL, NULL, NULL },    // CAN1 TX
+  { PH_13,        NULL, NULL, NULL },    // HD-connector: CAN1_TX -> software object: CAN
   { PH_14,        NULL, NULL, NULL },
   { PH_15,        NULL, NULL, NULL },
   { PI_0,         NULL, NULL, NULL },
