Fix: write returns either 0 or a negative error code on failure.

aentinger · aentinger · commit 10319d05b134 · 2023-04-13T10:54:58.000+02:00
diff --git a/libraries/Arduino_CAN/examples/CANWrite/CANWrite.ino b/libraries/Arduino_CAN/examples/CANWrite/CANWrite.ino
@@ -40,7 +40,7 @@ void loop()
   /* Transmit the CAN message, capture and display an
    * error core in case of failure.
    */
-  if (int const rc = CAN.write(msg); rc < 0)
+  if (int const rc = CAN.write(msg); rc <= 0)
   {
     Serial.print  ("CAN.write(...) failed with error code ");
     Serial.println(rc);

Original file line number	Diff line number	Diff line change
`@@ -40,7 +40,7 @@ void loop()`
`40`	`40`	`/* Transmit the CAN message, capture and display an`
`41`	`41`	`* error core in case of failure.`
`42`	`42`	`*/`
`43`		`- if (int const rc = CAN.write(msg); rc < 0)`
	`43`	`+ if (int const rc = CAN.write(msg); rc <= 0)`
`44`	`44`	`{`
`45`	`45`	`Serial.print ("CAN.write(...) failed with error code ");`
`46`	`46`	`Serial.println(rc);`