Fix:Hangup issue when sending.

examples/CANSenderTimeout/CANSenderTimeout.ino

@@ -0,0 +1,60 @@
+// Copyright (c) Sandeep Mistry. All rights reserved.
+// Licensed under the MIT license. See LICENSE file in the project root for full license information.
+
+#include <CAN.h>
+
+void setup() {
+  Serial.begin(9600);
+  while (!Serial);
+
+  Serial.println("CAN Sender");
+
+  // start the CAN bus at 500 kbps
+  if (!CAN.begin(500E3)) {
+    Serial.println("Starting CAN failed!");
+    while (1);
+  }
+}
+
+void loop() {
+  int error_code = 0;
+  int count = 0;
+
+  // send packet: id is 11 bits, packet can contain up to 8 bytes of data
+  Serial.print("Sending packet ... ");
+
+  CAN.beginPacket(0x12);
+  CAN.write('h');
+  CAN.write('e');
+  CAN.write('l');
+  CAN.write('l');
+  CAN.write('o');
+
+  while (true)
+  {
+    error_code = CAN.endPacket();
+
+    Serial.println(error_code);
+
+    if (error_code == 1)
+    {
+      Serial.print("Transmission complete!");
+      break;
+    }
+
+    if(count > 5)
+    {
+      Serial.print("timeout!");
+      CAN.sleep();
+      delay(50);
+      CAN.wakeup();
+      break;
+    }
+    count++;
+    delay(50);
+  }
+
+  Serial.println("done");
+
+  delay(1000);
+}

examples/CANSenderTimeout/debug.cfg

@@ -0,0 +1,14 @@
+# SPDX-License-Identifier: GPL-2.0-or-later
+#
+# Example OpenOCD configuration file for ESP32-WROVER-KIT board.
+#
+# For example, OpenOCD can be started for ESP32 debugging on
+#
+#   openocd -f board/esp32-wrover-kit-3.3v.cfg
+#
+
+# Source the JTAG interface configuration file
+source [find interface/ftdi/esp32_devkitj_v1.cfg]
+set ESP32_FLASH_VOLTAGE 3.3
+# Source the ESP32 configuration file
+source [find target/esp32.cfg]

examples/CANSenderTimeout/debug_custom.json

@@ -0,0 +1,19 @@
+{
+	"name":"Arduino on ESP32",
+	"toolchainPrefix":"xtensa-esp32-elf",
+	"svdFile":"esp32.svd",
+	"request":"attach",
+	"postAttachCommands":[
+		"set remote hardware-watchpoint-limit 2",
+		"monitor reset halt",
+		"monitor gdb_sync",
+		"thb setup",
+		"c"
+	],
+	"overrideRestartCommands":[
+		"monitor reset halt",
+		"monitor gdb_sync",
+		"thb setup",
+		"c"
+	]
+}