Some more serial stuff. (0.37.24)

examples/serial_demo.fun

@@ -0,0 +1,54 @@
+#!/usr/bin/env fun
+
+/*
+ * This file is part of the Fun programming language.
+ * https://fun-lang.xyz/
+ *
+ * Copyright 2025 Johannes Findeisen <you@hanez.org>
+ * Licensed under the terms of the Apache-2.0 license.
+ * https://opensource.org/license/apache-2-0
+ *
+ * Added: 2025-12-28
+ */
+
+#include <io/serial.fun>
+
+// This is an example of how to use the Serial class from the stdlib.
+// Note: This requires a serial device to be present at the specified path.
+
+path = "/dev/ttyUSB0"
+baud = 115200
+
+print("Opening serial port " + path + " at " + to_string(baud) + " baud...")
+s = Serial(path, baud)
+
+if (s.open())
+  print("Serial port opened successfully.")
+
+  // Configure: 8 data bits, no parity (0), 1 stop bit, no flow control (0)
+  if (s.config(8, 0, 1, 0))
+    print("Configured to 8N1.")
+
+    sent = s.send("AT\r\n")
+    print("Sent " + to_string(sent) + " bytes.")
+
+    // Wait a bit for response if needed (mocked by sleep if available)
+    // sleep_ms(100)
+
+    resp = s.recv(64)
+    if (len(resp) > 0)
+      print("Received: " + resp)
+    else
+      print("No response received.")
+  else
+    print("Failed to configure serial port.")
+
+  s.close()
+  print("Serial port closed.")
+else
+  print("Failed to open serial port. (Do you have permissions?)")
+
+/* Possible output:
+Opening serial port /dev/ttyUSB0 at 115200 baud...
+Failed to open serial port. (Do you have permissions?)
+*/

examples/test_serial.fun

@@ -48,3 +48,8 @@ fun test_serial()
     print("Could not open serial port (this is expected if /dev/ttyUSB0 doesn't exist or no permission)")
 
 test_serial()
+
+/* Possible output:
+Attempting to open serial port: /dev/ttyUSB0
+Could not open serial port (this is expected if /dev/ttyUSB0 doesn't exist or no permission)
+*/