diff --git a/apps/ping6/ping6.c b/apps/ping6/ping6.c
index 0d5b7021d..f7835a236 100644
--- a/apps/ping6/ping6.c
+++ b/apps/ping6/ping6.c
@@ -1,176 +1,176 @@
-/*
- * 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.
- *
- */
-
-#include "contiki.h"
-#include "contiki-lib.h"
-#include "contiki-net.h"
-
-#include "mac.h"
-
-#include <string.h>
-#include <stdio.h>
-
-#define MACDEBUG 0 
-
-#define DEBUG 0
-#if DEBUG
-#include <stdio.h>
-#define PRINTF(...) printf(__VA_ARGS__)
-#define PRINT6ADDR(addr) PRINTF(" %02x%02x:%02x%02x:%02x%02x:%02x%02x:%02x%02x:%02x%02x:%02x%02x:%02x%02x ", ((u8_t *)addr)[0], ((u8_t *)addr)[1], ((u8_t *)addr)[2], ((u8_t *)addr)[3], ((u8_t *)addr)[4], ((u8_t *)addr)[5], ((u8_t *)addr)[6], ((u8_t *)addr)[7], ((u8_t *)addr)[8], ((u8_t *)addr)[9], ((u8_t *)addr)[10], ((u8_t *)addr)[11], ((u8_t *)addr)[12], ((u8_t *)addr)[13], ((u8_t *)addr)[14], ((u8_t *)addr)[15])
-#define PRINTLLADDR(lladdr) PRINTF(" %02x:%02x:%02x:%02x:%02x:%02x ",lladdr->addr[0], lladdr->addr[1], lladdr->addr[2], lladdr->addr[3],lladdr->addr[4], lladdr->addr[5])
-#else
-#define PRINTF(...)
-#define PRINT6ADDR(addr)
-#endif
-
-#define PING6_NB 5
-#define PING6_DATALEN 16
-
-#define UIP_IP_BUF                ((struct uip_ip_hdr *)&uip_buf[UIP_LLH_LEN])
-#define UIP_ICMP_BUF            ((struct uip_icmp_hdr *)&uip_buf[uip_l2_l3_hdr_len])
-
-static struct etimer ping6_periodic_timer;
-static u8_t count = 0;
-static char command[20];
-static u16_t addr[8];
-uip_ipaddr_t dest_addr;
-
-PROCESS(ping6_process, "PING6 process");
-AUTOSTART_PROCESSES(&ping6_process);
-
-
-/*---------------------------------------------------------------------------*/
-static u8_t
-ping6handler(process_event_t ev, process_data_t data)
-{
-  if(count == 0){
-#if MACDEBUG
-    // Setup destination address.
-    addr[0] = 0xFE80;
-    addr[4] = 0x6466;
-    addr[5] = 0x6666;
-    addr[6] = 0x6666;
-    addr[7] = 0x6666;
-    uip_ip6addr(&dest_addr, addr[0], addr[1],addr[2],
-                addr[3],addr[4],addr[5],addr[6],addr[7]);
-
-    // Set the command to fool the 'if' below.
-    memcpy(command, (void *)"ping6", 5);
-    
-#else
-/* prompt */
-    printf("> ");
-    /** \note the scanf here is blocking (the all stack is blocked waiting
-     *  for user input). This is far from ideal and could be improved
-     */
-    scanf("%s", command);
-    
-    if(strcmp(command,"ping6") != 0){
-      PRINTF("> invalid command\n");
-      return 0;
-    }
-
-    if(scanf(" %04x:%04x:%04x:%04x:%04x:%04x:%04x:%04x",
-             &addr[0],&addr[1],&addr[2],&addr[3],
-             &addr[4],&addr[5],&addr[6],&addr[7]) == 8){
-
-      uip_ip6addr(&dest_addr, addr[0], addr[1],addr[2],
-                  addr[3],addr[4],addr[5],addr[6],addr[7]);
-    } else {
-      PRINTF("> invalid ipv6 address format\n");
-      return 0;
-    }
-#endif
-
-  } 
-  
-  if((strcmp(command,"ping6") == 0) && (count < PING6_NB)){
-   
-    UIP_IP_BUF->vtc = 0x60;
-    UIP_IP_BUF->tcflow = 1;
-    UIP_IP_BUF->flow = 0;
-    UIP_IP_BUF->proto = UIP_PROTO_ICMP6;
-    UIP_IP_BUF->ttl = uip_ds6_if.cur_hop_limit;
-    uip_ipaddr_copy(&UIP_IP_BUF->destipaddr, &dest_addr);
-    uip_ds6_select_src(&UIP_IP_BUF->srcipaddr, &UIP_IP_BUF->destipaddr);
- 
-    UIP_ICMP_BUF->type = ICMP6_ECHO_REQUEST;
-    UIP_ICMP_BUF->icode = 0;
-    /* set identifier and sequence number to 0 */
-    memset((void *)UIP_ICMP_BUF + UIP_ICMPH_LEN, 0, 4);
-    /* put one byte of data */
-    memset((void *)UIP_ICMP_BUF + UIP_ICMPH_LEN + UIP_ICMP6_ECHO_REQUEST_LEN,
-           count, PING6_DATALEN);
-     
-    
-    uip_len = UIP_ICMPH_LEN + UIP_ICMP6_ECHO_REQUEST_LEN + UIP_IPH_LEN + PING6_DATALEN;
-    UIP_IP_BUF->len[0] = (u8_t)((uip_len - 40) >> 8);
-    UIP_IP_BUF->len[1] = (u8_t)((uip_len - 40) & 0x00FF);
-    
-    UIP_ICMP_BUF->icmpchksum = 0;
-    UIP_ICMP_BUF->icmpchksum = ~uip_icmp6chksum();
-   
-    
-    PRINTF("Sending Echo Request to");
-    PRINT6ADDR(&UIP_IP_BUF->destipaddr);
-    PRINTF("from");
-    PRINT6ADDR(&UIP_IP_BUF->srcipaddr);
-    PRINTF("\n");
-    UIP_STAT(++uip_stat.icmp.sent);
-
-    tcpip_ipv6_output();
-
-    count++;
-    etimer_set(&ping6_periodic_timer, 3 * CLOCK_SECOND);
-    return 1;
-  }
-  return 0;
-}
-
-/*---------------------------------------------------------------------------*/
-PROCESS_THREAD(ping6_process, ev, data)
-{
-  
-  u8_t cont = 1;
-  
-  PROCESS_BEGIN();
-  PRINTF("In Process PING6\n");
-  PRINTF("Wait for DAD\n");
-
-  etimer_set(&ping6_periodic_timer, 15*CLOCK_SECOND);
- 
-  while(cont) {
-    PROCESS_YIELD();
-    cont = ping6handler(ev, data);
-  }
-  
-  PRINTF("END PING6\n");
-  PROCESS_END();
-}
-/*---------------------------------------------------------------------------*/
+/*
+ * 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.
+ *
+ */
+
+#include "contiki.h"
+#include "contiki-lib.h"
+#include "contiki-net.h"
+
+#include "mac.h"
+
+#include <string.h>
+#include <stdio.h>
+
+#define MACDEBUG 0
+
+#define DEBUG 0
+#if DEBUG
+#include <stdio.h>
+#define PRINTF(...) printf(__VA_ARGS__)
+#define PRINT6ADDR(addr) PRINTF(" %02x%02x:%02x%02x:%02x%02x:%02x%02x:%02x%02x:%02x%02x:%02x%02x:%02x%02x ", ((u8_t *)addr)[0], ((u8_t *)addr)[1], ((u8_t *)addr)[2], ((u8_t *)addr)[3], ((u8_t *)addr)[4], ((u8_t *)addr)[5], ((u8_t *)addr)[6], ((u8_t *)addr)[7], ((u8_t *)addr)[8], ((u8_t *)addr)[9], ((u8_t *)addr)[10], ((u8_t *)addr)[11], ((u8_t *)addr)[12], ((u8_t *)addr)[13], ((u8_t *)addr)[14], ((u8_t *)addr)[15])
+#define PRINTLLADDR(lladdr) PRINTF(" %02x:%02x:%02x:%02x:%02x:%02x ",lladdr->addr[0], lladdr->addr[1], lladdr->addr[2], lladdr->addr[3],lladdr->addr[4], lladdr->addr[5])
+#else
+#define PRINTF(...)
+#define PRINT6ADDR(addr)
+#endif
+
+#define PING6_NB 5
+#define PING6_DATALEN 16
+
+#define UIP_IP_BUF                ((struct uip_ip_hdr *)&uip_buf[UIP_LLH_LEN])
+#define UIP_ICMP_BUF            ((struct uip_icmp_hdr *)&uip_buf[uip_l2_l3_hdr_len])
+
+static struct etimer ping6_periodic_timer;
+static u8_t count = 0;
+static char command[20];
+static u16_t addr[8];
+uip_ipaddr_t dest_addr;
+
+PROCESS(ping6_process, "PING6 process");
+AUTOSTART_PROCESSES(&ping6_process);
+
+
+/*---------------------------------------------------------------------------*/
+static u8_t
+ping6handler(process_event_t ev, process_data_t data)
+{
+  if(count == 0){
+#if MACDEBUG
+    // Setup destination address.
+    addr[0] = 0xFE80;
+    addr[4] = 0x6466;
+    addr[5] = 0x6666;
+    addr[6] = 0x6666;
+    addr[7] = 0x6666;
+    uip_ip6addr(&dest_addr, addr[0], addr[1],addr[2],
+                addr[3],addr[4],addr[5],addr[6],addr[7]);
+
+    // Set the command to fool the 'if' below.
+    memcpy(command, (void *)"ping6", 5);
+
+#else
+/* prompt */
+    printf("> ");
+    /** \note the scanf here is blocking (the all stack is blocked waiting
+     *  for user input). This is far from ideal and could be improved
+     */
+    scanf("%s", command);
+
+    if(strcmp(command,"ping6") != 0){
+      PRINTF("> invalid command\n");
+      return 0;
+    }
+
+    if(scanf(" %04x:%04x:%04x:%04x:%04x:%04x:%04x:%04x",
+             &addr[0],&addr[1],&addr[2],&addr[3],
+             &addr[4],&addr[5],&addr[6],&addr[7]) == 8){
+
+      uip_ip6addr(&dest_addr, addr[0], addr[1],addr[2],
+                  addr[3],addr[4],addr[5],addr[6],addr[7]);
+    } else {
+      PRINTF("> invalid ipv6 address format\n");
+      return 0;
+    }
+#endif
+
+  }
+
+  if((strcmp(command,"ping6") == 0) && (count < PING6_NB)){
+
+    UIP_IP_BUF->vtc = 0x60;
+    UIP_IP_BUF->tcflow = 1;
+    UIP_IP_BUF->flow = 0;
+    UIP_IP_BUF->proto = UIP_PROTO_ICMP6;
+    UIP_IP_BUF->ttl = uip_ds6_if.cur_hop_limit;
+    uip_ipaddr_copy(&UIP_IP_BUF->destipaddr, &dest_addr);
+    uip_ds6_select_src(&UIP_IP_BUF->srcipaddr, &UIP_IP_BUF->destipaddr);
+
+    UIP_ICMP_BUF->type = ICMP6_ECHO_REQUEST;
+    UIP_ICMP_BUF->icode = 0;
+    /* set identifier and sequence number to 0 */
+    memset((void *)UIP_ICMP_BUF + UIP_ICMPH_LEN, 0, 4);
+    /* put one byte of data */
+    memset((void *)UIP_ICMP_BUF + UIP_ICMPH_LEN + UIP_ICMP6_ECHO_REQUEST_LEN,
+           count, PING6_DATALEN);
+
+
+    uip_len = UIP_ICMPH_LEN + UIP_ICMP6_ECHO_REQUEST_LEN + UIP_IPH_LEN + PING6_DATALEN;
+    UIP_IP_BUF->len[0] = (u8_t)((uip_len - 40) >> 8);
+    UIP_IP_BUF->len[1] = (u8_t)((uip_len - 40) & 0x00FF);
+
+    UIP_ICMP_BUF->icmpchksum = 0;
+    UIP_ICMP_BUF->icmpchksum = ~uip_icmp6chksum();
+
+
+    PRINTF("Sending Echo Request to");
+    PRINT6ADDR(&UIP_IP_BUF->destipaddr);
+    PRINTF("from");
+    PRINT6ADDR(&UIP_IP_BUF->srcipaddr);
+    PRINTF("\n");
+    UIP_STAT(++uip_stat.icmp.sent);
+
+    tcpip_ipv6_output();
+
+    count++;
+    etimer_set(&ping6_periodic_timer, 3 * CLOCK_SECOND);
+    return 1;
+  }
+  return 0;
+}
+
+/*---------------------------------------------------------------------------*/
+PROCESS_THREAD(ping6_process, ev, data)
+{
+
+  u8_t cont = 1;
+
+  PROCESS_BEGIN();
+  PRINTF("In Process PING6\n");
+  PRINTF("Wait for DAD\n");
+
+  etimer_set(&ping6_periodic_timer, 15*CLOCK_SECOND);
+
+  while(cont) {
+    PROCESS_YIELD();
+    cont = ping6handler(ev, data);
+  }
+
+  PRINTF("END PING6\n");
+  PROCESS_END();
+}
+/*---------------------------------------------------------------------------*/
diff --git a/core/lib/gcr.c b/core/lib/gcr.c
index 3d89d073c..b768f96ca 100644
--- a/core/lib/gcr.c
+++ b/core/lib/gcr.c
@@ -1,163 +1,163 @@
-/*
- * Copyright (c) 2006, 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: gcr.c,v 1.1 2006/10/05 09:23:41 adamdunkels Exp $
- */
-
-/**
- * \file
- *         Implementation of GCR coding/decoding
- * \author
- *         Joakim Eriksson <joakime@sics.se>
- *
- */
-
-/* GCR conversion table - used for converting ordinary byte to 10-bits */
-/* (or 4 bits to 5) */
-static const unsigned char GCR_encode[16] = {
-    0x0a, 0x0b, 0x12, 0x13,
-    0x0e, 0x0f, 0x16, 0x17,
-    0x09, 0x19, 0x1a, 0x1b,
-    0x0d, 0x1d, 0x1e, 0x15
-};
-
-/*  5 bits > 4 bits (0xff => invalid) */
-static const unsigned char GCR_decode[32] = {
-    0xff, 0xff, 0xff, 0xff, // 0 - 3invalid...
-    0xff, 0xff, 0xff, 0xff, // 4 - 7 invalid...
-    0xff, 0x08, 0x00, 0x01, // 8 invalid... 9 = 8, a = 0, b = 1
-    0xff, 0x0c, 0x04, 0x05, // c invalid... d = c, e = 4, f = 5
-
-    0xff, 0xff, 0x02, 0x03, // 10-11 invalid...
-    0xff, 0x0f, 0x06, 0x07, // 14 invalid...
-    0xff, 0x09, 0x0a, 0x0b, // 18 invalid...
-    0xff, 0x0d, 0x0e, 0xff, // 1c, 1f invalid...
-  };
-
-static unsigned char gcr_bits = 0;
-static unsigned short gcr_val = 0;
-
-/* Call before starting encoding or decoding */
-void gcr_init() {
-  gcr_val = 0;
-  gcr_bits = 0;
-}
-
-/* Use this to check if encoding / decoding is complete for now */
-unsigned char gcr_finished() {
-  return gcr_bits == 0;
-}
-
-/* Encode one character - and store in bits - get encoded with get_encoded */
-void gcr_encode(unsigned char raw_data) {
-  gcr_val |=
-    ((GCR_encode[raw_data >> 4u] << 5u ) |
-     GCR_encode[raw_data & 0xf]) << gcr_bits;
-  gcr_bits += 10;
-}
-
-/* Gets the current char of the encoded stream */
-unsigned char gcr_get_encoded(unsigned char *raw_data) {
-  if (gcr_bits >= 8) {
-    *raw_data = (unsigned char) (gcr_val & 0xff);
-    gcr_val = gcr_val >> 8u;
-    gcr_bits = gcr_bits - 8;
-    return 1;
-  }
-  return 0;
-}
-
-/* Decode one char - result can be get from get_decoded */
-void gcr_decode(unsigned char gcr_data) {
-  gcr_val |= gcr_data << gcr_bits;
-  gcr_bits += 8;
-}
-
-/* check if the current decoded stream is correct */
-unsigned char gcr_valid() {
-  if (gcr_bits >= 10) {
-    unsigned short val = gcr_val & 0x3ff;
-    if ((GCR_decode[val >> 5u] << 4u) == 0xff ||
-	(GCR_decode[val & 0x1f]) == 0xff) {
-      return 0;
-    }
-  }
-  return 1;
-}
-
-/* gets the decoded stream - if any char is available */
-unsigned char gcr_get_decoded(unsigned char *raw_data) {
-  if (gcr_bits >= 10) {
-    unsigned short val = gcr_val & 0x3ff;
-    *raw_data = (unsigned char) ((GCR_decode[val >> 5] << 4) |
-				 (GCR_decode[val & 0x1f]));
-    gcr_val = gcr_val >> 10;
-    gcr_bits = gcr_bits - 10;
-    return 1;
-  }
-  return 0;
-}
-
-/*
-static const char encoded[] = {
-  0x4a, 0x25, 0xa5, 0xfc, 0x96, 0xff, 0xff, 0xb5, 0xd4, 0x5a, 0xea, 0xff, 0xff, 0xaa, 0xd3, 0xff
-};
-
-int main(int argc, char **argv) {
-  // unsigned char c[] = "testing gcr 1 2 3 4 5 6...";
-  unsigned char c[] = { 0, 8, 0xe0, 0x2b, 0xac, 0x10, 0x01, 0x11, 0x50, 0xff, 0xf4, 0xa4, 0x00 };
-  unsigned char c2[200];
-  int pos = 0, pos2 = 0, i = 0;
-
-  printf("Testing GCR on: %s \n", c);
-
-  gcr_init();
-  for (i = 0; i < sizeof(c); i++) {
-    gcr_encode(c[i]);
-    while(gcr_get_encoded(&c2[pos])) {
-      printf("%02x=>%02x ", c[i], c2[pos]);
-      pos++;
-    }
-  }
-  printf("\n");
-  printf("Encoded result %d chars (from %d) \n", pos, i);
-  gcr_init();
-  for (i = 0; i < pos; i++) {
-    gcr_decode(c2[i]);
-    if(!gcr_valid()) {
-      printf("GCR: not valid\n");
-    }
-    while(gcr_get_decoded(&c[pos2])) {
-      pos2++;
-    }
-  }
-  printf("GCR: %s\n",c);
-}
-*/
+/*
+ * Copyright (c) 2006, 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: gcr.c,v 1.2 2011/01/07 11:55:36 nifi Exp $
+ */
+
+/**
+ * \file
+ *         Implementation of GCR coding/decoding
+ * \author
+ *         Joakim Eriksson <joakime@sics.se>
+ *
+ */
+
+/* GCR conversion table - used for converting ordinary byte to 10-bits */
+/* (or 4 bits to 5) */
+static const unsigned char GCR_encode[16] = {
+    0x0a, 0x0b, 0x12, 0x13,
+    0x0e, 0x0f, 0x16, 0x17,
+    0x09, 0x19, 0x1a, 0x1b,
+    0x0d, 0x1d, 0x1e, 0x15
+};
+
+/*  5 bits > 4 bits (0xff => invalid) */
+static const unsigned char GCR_decode[32] = {
+    0xff, 0xff, 0xff, 0xff, // 0 - 3invalid...
+    0xff, 0xff, 0xff, 0xff, // 4 - 7 invalid...
+    0xff, 0x08, 0x00, 0x01, // 8 invalid... 9 = 8, a = 0, b = 1
+    0xff, 0x0c, 0x04, 0x05, // c invalid... d = c, e = 4, f = 5
+
+    0xff, 0xff, 0x02, 0x03, // 10-11 invalid...
+    0xff, 0x0f, 0x06, 0x07, // 14 invalid...
+    0xff, 0x09, 0x0a, 0x0b, // 18 invalid...
+    0xff, 0x0d, 0x0e, 0xff, // 1c, 1f invalid...
+  };
+
+static unsigned char gcr_bits = 0;
+static unsigned short gcr_val = 0;
+
+/* Call before starting encoding or decoding */
+void gcr_init() {
+  gcr_val = 0;
+  gcr_bits = 0;
+}
+
+/* Use this to check if encoding / decoding is complete for now */
+unsigned char gcr_finished() {
+  return gcr_bits == 0;
+}
+
+/* Encode one character - and store in bits - get encoded with get_encoded */
+void gcr_encode(unsigned char raw_data) {
+  gcr_val |=
+    ((GCR_encode[raw_data >> 4u] << 5u ) |
+     GCR_encode[raw_data & 0xf]) << gcr_bits;
+  gcr_bits += 10;
+}
+
+/* Gets the current char of the encoded stream */
+unsigned char gcr_get_encoded(unsigned char *raw_data) {
+  if (gcr_bits >= 8) {
+    *raw_data = (unsigned char) (gcr_val & 0xff);
+    gcr_val = gcr_val >> 8u;
+    gcr_bits = gcr_bits - 8;
+    return 1;
+  }
+  return 0;
+}
+
+/* Decode one char - result can be get from get_decoded */
+void gcr_decode(unsigned char gcr_data) {
+  gcr_val |= gcr_data << gcr_bits;
+  gcr_bits += 8;
+}
+
+/* check if the current decoded stream is correct */
+unsigned char gcr_valid() {
+  if (gcr_bits >= 10) {
+    unsigned short val = gcr_val & 0x3ff;
+    if ((GCR_decode[val >> 5u] << 4u) == 0xff ||
+	(GCR_decode[val & 0x1f]) == 0xff) {
+      return 0;
+    }
+  }
+  return 1;
+}
+
+/* gets the decoded stream - if any char is available */
+unsigned char gcr_get_decoded(unsigned char *raw_data) {
+  if (gcr_bits >= 10) {
+    unsigned short val = gcr_val & 0x3ff;
+    *raw_data = (unsigned char) ((GCR_decode[val >> 5] << 4) |
+				 (GCR_decode[val & 0x1f]));
+    gcr_val = gcr_val >> 10;
+    gcr_bits = gcr_bits - 10;
+    return 1;
+  }
+  return 0;
+}
+
+/*
+static const char encoded[] = {
+  0x4a, 0x25, 0xa5, 0xfc, 0x96, 0xff, 0xff, 0xb5, 0xd4, 0x5a, 0xea, 0xff, 0xff, 0xaa, 0xd3, 0xff
+};
+
+int main(int argc, char **argv) {
+  // unsigned char c[] = "testing gcr 1 2 3 4 5 6...";
+  unsigned char c[] = { 0, 8, 0xe0, 0x2b, 0xac, 0x10, 0x01, 0x11, 0x50, 0xff, 0xf4, 0xa4, 0x00 };
+  unsigned char c2[200];
+  int pos = 0, pos2 = 0, i = 0;
+
+  printf("Testing GCR on: %s \n", c);
+
+  gcr_init();
+  for (i = 0; i < sizeof(c); i++) {
+    gcr_encode(c[i]);
+    while(gcr_get_encoded(&c2[pos])) {
+      printf("%02x=>%02x ", c[i], c2[pos]);
+      pos++;
+    }
+  }
+  printf("\n");
+  printf("Encoded result %d chars (from %d) \n", pos, i);
+  gcr_init();
+  for (i = 0; i < pos; i++) {
+    gcr_decode(c2[i]);
+    if(!gcr_valid()) {
+      printf("GCR: not valid\n");
+    }
+    while(gcr_get_decoded(&c[pos2])) {
+      pos2++;
+    }
+  }
+  printf("GCR: %s\n",c);
+}
+*/