SLIP and UART configurations for the CB gateway.

platform/cc2420dbk/dev/cb_uart01.c

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+/*
+ * Copyright (c) 2007, 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. 
+ *
+ * @(#)$Id: cb_uart01.c,v 1.1 2007/02/02 14:09:06 bg- Exp $
+ */
+
+#include <stdio.h>
+
+#include <avr/interrupt.h>
+
+#include "contiki.h"
+
+#include "dev/slip.h"
+
+static int
+uart0_putchar(char c, FILE *stream)
+{
+  while (!(UCSR0A & BV(UDRE0)))
+    ;
+  UDR0 = c;
+
+  return c;
+}
+
+static FILE uart0_stdout =
+FDEV_SETUP_STREAM(uart0_putchar, NULL, _FDEV_SETUP_WRITE);
+
+void
+slip_arch_init(unsigned long ubr)
+{
+  u8_t dummy;
+  spl_t s = splhigh();
+
+  UBRR1L = ubr; 
+  UBRR1H = ubr >> 8;
+
+  UCSR1C = BV(UCSZ1) | BV(UCSZ0); /* 1 start bit, no parity, 1 stop bit */
+  UCSR1B = BV(RXEN) | BV(TXEN) | BV(RXCIE);
+  dummy = UDR1;			/* Flush RX buffer. */
+
+  /* And now UART0. */
+  UBRR0L = BAUD2UBR(38400); 
+  UBRR0H = BAUD2UBR(38400) >> 8;
+
+  UCSR0C = BV(UCSZ1) | BV(UCSZ0); /* 1 start bit, no parity, 1 stop bit */
+  UCSR0B = BV(TXEN);		/* TX ONLY!!! */
+
+  splx(s);
+
+  stdout = &uart0_stdout;
+}
+
+void
+slip_arch_writeb(unsigned char c)
+{
+  while (!(UCSR1A & BV(UDRE1)))
+    ;
+  UDR1 = c;
+}
+
+ISR(SIG_UART1_RECV)
+{
+  /* Should deal with receive errors. */
+  slip_input_byte(UDR1);
+}