Adding sketch for CAN1Read (reading from CAN1).

Former-commit-id: e3fceb2

Author: aentinger

libraries/CAN/examples/CAN1Read/CAN1Read.ino

@@ -0,0 +1,41 @@
+/**************************************************************************************
+ * INCLUDE
+ **************************************************************************************/
+
+#include <CAN.h>
+
+/**************************************************************************************
+ * SETUP/LOOP
+ **************************************************************************************/
+
+void setup()
+{
+  Serial.begin(115200);
+  while (!Serial) { }
+
+  /* You need to enable the CAN transceiver
+ * by commenting in below code when using
+ * a Portenta H33 on a Portenta Max Carrier.
+ * Note: Only CAN1 is available on the Portenta
+ * Max Carrier's RJ10 CAN connector.
+ */
+#if (PIN_CAN1_STBY >= 0)
+  pinMode(PIN_CAN1_STBY, OUTPUT);
+  digitalWrite(PIN_CAN1_STBY, LOW);
+#endif
+
+  if (!CAN1.begin(CanBitRate::BR_250k))
+  {
+    Serial.println("CAN.begin(...) failed.");
+    for (;;) {}
+  }
+}
+
+void loop()
+{
+  if (CAN1.available())
+  {
+    CanMsg const msg = CAN1.read();
+    Serial.println(msg);
+  }
+}