Import of the contiki-2.x development code from the SICS internal CVS server

core/dev/serial.c

@@ -0,0 +1,101 @@
+/*
+ * Copyright (c) 2005, Swedish Institute of Computer Science
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ * 3. Neither the name of the Institute nor the names of its contributors
+ *    may be used to endorse or promote products derived from this software
+ *    without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE INSTITUTE AND CONTRIBUTORS ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED.  IN NO EVENT SHALL THE INSTITUTE OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ *
+ * This file is part of the Contiki operating system.
+ *
+ * @(#)$Id: serial.c,v 1.1 2006/06/17 22:41:17 adamdunkels Exp $
+ */
+#include "serial.h"
+#include <string.h> /* for memcpy() */
+
+
+#ifdef SERIAL_CONF_BUFSIZE
+#define BUFSIZE SERIAL_CONF_BUFSIZE
+#else /* SERIAL_CONF_BUFSIZE */
+#define BUFSIZE 40
+#endif /* SERIAL_CONF_BUFSIZE */
+
+#define IGNORE_CHAR(c) (c == 0x0d)
+#define END 0x0a
+
+static char buffer[BUFSIZE], appbuffer[BUFSIZE];
+static unsigned char bufwptr;
+static char buffer_full = 0;
+
+PROCESS(serial_process, "Serial driver");
+
+process_event_t serial_event_message;
+
+/*---------------------------------------------------------------------------*/
+int
+serial_input_byte(unsigned char c)
+{
+  if(!buffer_full && !IGNORE_CHAR(c)) {
+    buffer[bufwptr] = c;
+    if(bufwptr < BUFSIZE) {
+      ++bufwptr;
+    }
+    
+    if(c == END) {
+      buffer_full++;
+      process_poll(&serial_process);
+      return 1;
+    }
+  }
+  return 0;
+}
+/*---------------------------------------------------------------------------*/
+PROCESS_THREAD(serial_process, ev, data)
+{
+  PROCESS_BEGIN();
+
+  bufwptr = 0;
+  buffer_full = 0;
+
+  serial_event_message = process_alloc_event();
+
+  while(1) {
+    PROCESS_YIELD();
+    
+    if(buffer_full) {
+      memcpy(appbuffer, buffer, bufwptr);
+      process_post(PROCESS_BROADCAST, serial_event_message, appbuffer);
+      buffer_full = 0;
+      bufwptr = 0;
+    }
+  }
+
+  PROCESS_END();
+}
+/*---------------------------------------------------------------------------*/
+void
+serial_init(void)
+{
+  process_start(&serial_process, NULL);
+}
+/*---------------------------------------------------------------------------*/