Yann Garcia / Mbed 2 deprecated DS130x_I2CApp

This short program illustrates how to use the DS130x_I2C library. My objective is to share the same RTC with Microchip 18F MCU.

Dependencies:   mbed DebugLibrary

NetServices/lwip/netif/slipif.c@1:995212d326ca, 2011-02-11 (annotated)

Committer:
Yann
Date:
Fri Feb 11 10:17:20 2011 +0000
Revision:
1:995212d326ca
Parent:
0:f30e2135b0db 
V0.0.0.2

Who changed what in which revision?

UserRevisionLine numberNew contents of line
Yann 0:f30e2135b0db 1 /**
Yann 0:f30e2135b0db 2 * @file
Yann 0:f30e2135b0db 3 * SLIP Interface
Yann 0:f30e2135b0db 4 *
Yann 0:f30e2135b0db 5 */
Yann 0:f30e2135b0db 6
Yann 0:f30e2135b0db 7 /*
Yann 0:f30e2135b0db 8 * Copyright (c) 2001-2004 Swedish Institute of Computer Science.
Yann 0:f30e2135b0db 9 * All rights reserved.
Yann 0:f30e2135b0db 10 *
Yann 0:f30e2135b0db 11 * Redistribution and use in source and binary forms, with or without
Yann 0:f30e2135b0db 12 * modification, are permitted provided that the following conditions
Yann 0:f30e2135b0db 13 * are met:
Yann 0:f30e2135b0db 14 * 1. Redistributions of source code must retain the above copyright
Yann 0:f30e2135b0db 15 * notice, this list of conditions and the following disclaimer.
Yann 0:f30e2135b0db 16 * 2. Redistributions in binary form must reproduce the above copyright
Yann 0:f30e2135b0db 17 * notice, this list of conditions and the following disclaimer in the
Yann 0:f30e2135b0db 18 * documentation and/or other materials provided with the distribution.
Yann 0:f30e2135b0db 19 * 3. Neither the name of the Institute nor the names of its contributors
Yann 0:f30e2135b0db 20 * may be used to endorse or promote products derived from this software
Yann 0:f30e2135b0db 21 * without specific prior written permission.
Yann 0:f30e2135b0db 22 *
Yann 0:f30e2135b0db 23 * THIS SOFTWARE IS PROVIDED BY THE INSTITUTE AND CONTRIBUTORS ``AS IS'' AND
Yann 0:f30e2135b0db 24 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
Yann 0:f30e2135b0db 25 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
Yann 0:f30e2135b0db 26 * ARE DISCLAIMED. IN NO EVENT SHALL THE INSTITUTE OR CONTRIBUTORS BE LIABLE
Yann 0:f30e2135b0db 27 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
Yann 0:f30e2135b0db 28 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
Yann 0:f30e2135b0db 29 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
Yann 0:f30e2135b0db 30 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
Yann 0:f30e2135b0db 31 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
Yann 0:f30e2135b0db 32 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
Yann 0:f30e2135b0db 33 * SUCH DAMAGE.
Yann 0:f30e2135b0db 34 *
Yann 0:f30e2135b0db 35 * This file is built upon the file: src/arch/rtxc/netif/sioslip.c
Yann 0:f30e2135b0db 36 *
Yann 0:f30e2135b0db 37 * Author: Magnus Ivarsson <magnus.ivarsson(at)volvo.com>
Yann 0:f30e2135b0db 38 */
Yann 0:f30e2135b0db 39
Yann 0:f30e2135b0db 40 /*
Yann 0:f30e2135b0db 41 * This is an arch independent SLIP netif. The specific serial hooks must be
Yann 0:f30e2135b0db 42 * provided by another file. They are sio_open, sio_read/sio_tryread and sio_send
Yann 0:f30e2135b0db 43 */
Yann 0:f30e2135b0db 44
Yann 0:f30e2135b0db 45 #include "netif/slipif.h"
Yann 0:f30e2135b0db 46 #include "lwip/opt.h"
Yann 0:f30e2135b0db 47
Yann 0:f30e2135b0db 48 #if LWIP_HAVE_SLIPIF
Yann 0:f30e2135b0db 49
Yann 0:f30e2135b0db 50 #include "lwip/def.h"
Yann 0:f30e2135b0db 51 #include "lwip/pbuf.h"
Yann 0:f30e2135b0db 52 #include "lwip/sys.h"
Yann 0:f30e2135b0db 53 #include "lwip/stats.h"
Yann 0:f30e2135b0db 54 #include "lwip/snmp.h"
Yann 0:f30e2135b0db 55 #include "lwip/sio.h"
Yann 0:f30e2135b0db 56
Yann 0:f30e2135b0db 57 #define SLIP_BLOCK 1
Yann 0:f30e2135b0db 58 #define SLIP_DONTBLOCK 0
Yann 0:f30e2135b0db 59
Yann 0:f30e2135b0db 60 #define SLIP_END 0300 /* 0xC0 */
Yann 0:f30e2135b0db 61 #define SLIP_ESC 0333 /* 0xDB */
Yann 0:f30e2135b0db 62 #define SLIP_ESC_END 0334 /* 0xDC */
Yann 0:f30e2135b0db 63 #define SLIP_ESC_ESC 0335 /* 0xDD */
Yann 0:f30e2135b0db 64
Yann 0:f30e2135b0db 65 #define SLIP_MAX_SIZE 1500
Yann 0:f30e2135b0db 66
Yann 0:f30e2135b0db 67 enum slipif_recv_state {
Yann 0:f30e2135b0db 68 SLIP_RECV_NORMAL,
Yann 0:f30e2135b0db 69 SLIP_RECV_ESCAPE,
Yann 0:f30e2135b0db 70 };
Yann 0:f30e2135b0db 71
Yann 0:f30e2135b0db 72 struct slipif_priv {
Yann 0:f30e2135b0db 73 sio_fd_t sd;
Yann 0:f30e2135b0db 74 /* q is the whole pbuf chain for a packet, p is the current pbuf in the chain */
Yann 0:f30e2135b0db 75 struct pbuf *p, *q;
Yann 0:f30e2135b0db 76 enum slipif_recv_state state;
Yann 0:f30e2135b0db 77 u16_t i, recved;
Yann 0:f30e2135b0db 78 };
Yann 0:f30e2135b0db 79
Yann 0:f30e2135b0db 80 /**
Yann 0:f30e2135b0db 81 * Send a pbuf doing the necessary SLIP encapsulation
Yann 0:f30e2135b0db 82 *
Yann 0:f30e2135b0db 83 * Uses the serial layer's sio_send()
Yann 0:f30e2135b0db 84 *
Yann 0:f30e2135b0db 85 * @param netif the lwip network interface structure for this slipif
Yann 0:f30e2135b0db 86 * @param p the pbuf chaing packet to send
Yann 0:f30e2135b0db 87 * @param ipaddr the ip address to send the packet to (not used for slipif)
Yann 0:f30e2135b0db 88 * @return always returns ERR_OK since the serial layer does not provide return values
Yann 0:f30e2135b0db 89 */
Yann 0:f30e2135b0db 90 err_t
Yann 0:f30e2135b0db 91 slipif_output(struct netif *netif, struct pbuf *p, ip_addr_t *ipaddr)
Yann 0:f30e2135b0db 92 {
Yann 0:f30e2135b0db 93 struct slipif_priv *priv;
Yann 0:f30e2135b0db 94 struct pbuf *q;
Yann 0:f30e2135b0db 95 u16_t i;
Yann 0:f30e2135b0db 96 u8_t c;
Yann 0:f30e2135b0db 97
Yann 0:f30e2135b0db 98 LWIP_ASSERT("netif != NULL", (netif != NULL));
Yann 0:f30e2135b0db 99 LWIP_ASSERT("netif->state != NULL", (netif->state != NULL));
Yann 0:f30e2135b0db 100 LWIP_ASSERT("p != NULL", (p != NULL));
Yann 0:f30e2135b0db 101
Yann 0:f30e2135b0db 102 LWIP_UNUSED_ARG(ipaddr);
Yann 0:f30e2135b0db 103
Yann 0:f30e2135b0db 104 priv = netif->state;
Yann 0:f30e2135b0db 105
Yann 0:f30e2135b0db 106 /* Send pbuf out on the serial I/O device. */
Yann 0:f30e2135b0db 107 sio_send(SLIP_END, priv->sd);
Yann 0:f30e2135b0db 108
Yann 0:f30e2135b0db 109 for (q = p; q != NULL; q = q->next) {
Yann 0:f30e2135b0db 110 for (i = 0; i < q->len; i++) {
Yann 0:f30e2135b0db 111 c = ((u8_t *)q->payload)[i];
Yann 0:f30e2135b0db 112 switch (c) {
Yann 0:f30e2135b0db 113 case SLIP_END:
Yann 0:f30e2135b0db 114 sio_send(SLIP_ESC, priv->sd);
Yann 0:f30e2135b0db 115 sio_send(SLIP_ESC_END, priv->sd);
Yann 0:f30e2135b0db 116 break;
Yann 0:f30e2135b0db 117 case SLIP_ESC:
Yann 0:f30e2135b0db 118 sio_send(SLIP_ESC, priv->sd);
Yann 0:f30e2135b0db 119 sio_send(SLIP_ESC_ESC, priv->sd);
Yann 0:f30e2135b0db 120 break;
Yann 0:f30e2135b0db 121 default:
Yann 0:f30e2135b0db 122 sio_send(c, priv->sd);
Yann 0:f30e2135b0db 123 break;
Yann 0:f30e2135b0db 124 }
Yann 0:f30e2135b0db 125 }
Yann 0:f30e2135b0db 126 }
Yann 0:f30e2135b0db 127 sio_send(SLIP_END, priv->sd);
Yann 0:f30e2135b0db 128 return ERR_OK;
Yann 0:f30e2135b0db 129 }
Yann 0:f30e2135b0db 130
Yann 0:f30e2135b0db 131 /**
Yann 0:f30e2135b0db 132 * Static function for easy use of blockig or non-blocking
Yann 0:f30e2135b0db 133 * sio_read
Yann 0:f30e2135b0db 134 *
Yann 0:f30e2135b0db 135 * @param fd serial device handle
Yann 0:f30e2135b0db 136 * @param data pointer to data buffer for receiving
Yann 0:f30e2135b0db 137 * @param len maximum length (in bytes) of data to receive
Yann 0:f30e2135b0db 138 * @param block if 1, call sio_read; if 0, call sio_tryread
Yann 0:f30e2135b0db 139 * @return return value of sio_read of sio_tryread
Yann 0:f30e2135b0db 140 */
Yann 0:f30e2135b0db 141 static u32_t
Yann 0:f30e2135b0db 142 slip_sio_read(sio_fd_t fd, u8_t* data, u32_t len, u8_t block)
Yann 0:f30e2135b0db 143 {
Yann 0:f30e2135b0db 144 if (block) {
Yann 0:f30e2135b0db 145 return sio_read(fd, data, len);
Yann 0:f30e2135b0db 146 } else {
Yann 0:f30e2135b0db 147 return sio_tryread(fd, data, len);
Yann 0:f30e2135b0db 148 }
Yann 0:f30e2135b0db 149 }
Yann 0:f30e2135b0db 150
Yann 0:f30e2135b0db 151 /**
Yann 0:f30e2135b0db 152 * Handle the incoming SLIP stream character by character
Yann 0:f30e2135b0db 153 *
Yann 0:f30e2135b0db 154 * Poll the serial layer by calling sio_read() or sio_tryread().
Yann 0:f30e2135b0db 155 *
Yann 0:f30e2135b0db 156 * @param netif the lwip network interface structure for this slipif
Yann 0:f30e2135b0db 157 * @param block if 1, block until data is received; if 0, return when all data
Yann 0:f30e2135b0db 158 * from the buffer is received (multiple calls to this function will
Yann 0:f30e2135b0db 159 * return a complete packet, NULL is returned before - used for polling)
Yann 0:f30e2135b0db 160 * @return The IP packet when SLIP_END is received
Yann 0:f30e2135b0db 161 */
Yann 0:f30e2135b0db 162 static struct pbuf *
Yann 0:f30e2135b0db 163 slipif_input(struct netif *netif, u8_t block)
Yann 0:f30e2135b0db 164 {
Yann 0:f30e2135b0db 165 struct slipif_priv *priv;
Yann 0:f30e2135b0db 166 u8_t c;
Yann 0:f30e2135b0db 167 struct pbuf *t;
Yann 0:f30e2135b0db 168
Yann 0:f30e2135b0db 169 LWIP_ASSERT("netif != NULL", (netif != NULL));
Yann 0:f30e2135b0db 170 LWIP_ASSERT("netif->state != NULL", (netif->state != NULL));
Yann 0:f30e2135b0db 171
Yann 0:f30e2135b0db 172 priv = netif->state;
Yann 0:f30e2135b0db 173
Yann 0:f30e2135b0db 174 while (slip_sio_read(priv->sd, &c, 1, block) > 0) {
Yann 0:f30e2135b0db 175 switch (priv->state) {
Yann 0:f30e2135b0db 176 case SLIP_RECV_NORMAL:
Yann 0:f30e2135b0db 177 switch (c) {
Yann 0:f30e2135b0db 178 case SLIP_END:
Yann 0:f30e2135b0db 179 if (priv->recved > 0) {
Yann 0:f30e2135b0db 180 /* Received whole packet. */
Yann 0:f30e2135b0db 181 /* Trim the pbuf to the size of the received packet. */
Yann 0:f30e2135b0db 182 pbuf_realloc(priv->q, priv->recved);
Yann 0:f30e2135b0db 183
Yann 0:f30e2135b0db 184 LINK_STATS_INC(link.recv);
Yann 0:f30e2135b0db 185
Yann 0:f30e2135b0db 186 LWIP_DEBUGF(SLIP_DEBUG, ("slipif: Got packet\n"));
Yann 0:f30e2135b0db 187 t = priv->q;
Yann 0:f30e2135b0db 188 priv->p = priv->q = NULL;
Yann 0:f30e2135b0db 189 priv->i = priv->recved = 0;
Yann 0:f30e2135b0db 190 return t;
Yann 0:f30e2135b0db 191 }
Yann 0:f30e2135b0db 192 continue;
Yann 0:f30e2135b0db 193 case SLIP_ESC:
Yann 0:f30e2135b0db 194 priv->state = SLIP_RECV_ESCAPE;
Yann 0:f30e2135b0db 195 continue;
Yann 0:f30e2135b0db 196 }
Yann 0:f30e2135b0db 197 break;
Yann 0:f30e2135b0db 198 case SLIP_RECV_ESCAPE:
Yann 0:f30e2135b0db 199 switch (c) {
Yann 0:f30e2135b0db 200 case SLIP_ESC_END:
Yann 0:f30e2135b0db 201 c = SLIP_END;
Yann 0:f30e2135b0db 202 break;
Yann 0:f30e2135b0db 203 case SLIP_ESC_ESC:
Yann 0:f30e2135b0db 204 c = SLIP_ESC;
Yann 0:f30e2135b0db 205 break;
Yann 0:f30e2135b0db 206 }
Yann 0:f30e2135b0db 207 priv->state = SLIP_RECV_NORMAL;
Yann 0:f30e2135b0db 208 /* FALLTHROUGH */
Yann 0:f30e2135b0db 209 }
Yann 0:f30e2135b0db 210
Yann 0:f30e2135b0db 211 /* byte received, packet not yet completely received */
Yann 0:f30e2135b0db 212 if (priv->p == NULL) {
Yann 0:f30e2135b0db 213 /* allocate a new pbuf */
Yann 0:f30e2135b0db 214 LWIP_DEBUGF(SLIP_DEBUG, ("slipif_input: alloc\n"));
Yann 0:f30e2135b0db 215 priv->p = pbuf_alloc(PBUF_LINK, (PBUF_POOL_BUFSIZE - PBUF_LINK_HLEN), PBUF_POOL);
Yann 0:f30e2135b0db 216
Yann 0:f30e2135b0db 217 if (priv->p == NULL) {
Yann 0:f30e2135b0db 218 LINK_STATS_INC(link.drop);
Yann 0:f30e2135b0db 219 LWIP_DEBUGF(SLIP_DEBUG, ("slipif_input: no new pbuf! (DROP)\n"));
Yann 0:f30e2135b0db 220 /* don't process any further since we got no pbuf to receive to */
Yann 0:f30e2135b0db 221 break;
Yann 0:f30e2135b0db 222 }
Yann 0:f30e2135b0db 223
Yann 0:f30e2135b0db 224 if (priv->q != NULL) {
Yann 0:f30e2135b0db 225 /* 'chain' the pbuf to the existing chain */
Yann 0:f30e2135b0db 226 pbuf_cat(priv->q, priv->p);
Yann 0:f30e2135b0db 227 } else {
Yann 0:f30e2135b0db 228 /* p is the first pbuf in the chain */
Yann 0:f30e2135b0db 229 priv->q = priv->p;
Yann 0:f30e2135b0db 230 }
Yann 0:f30e2135b0db 231 }
Yann 0:f30e2135b0db 232
Yann 0:f30e2135b0db 233 /* this automatically drops bytes if > SLIP_MAX_SIZE */
Yann 0:f30e2135b0db 234 if ((priv->p != NULL) && (priv->recved <= SLIP_MAX_SIZE)) {
Yann 0:f30e2135b0db 235 ((u8_t *)priv->p->payload)[priv->i] = c;
Yann 0:f30e2135b0db 236 priv->recved++;
Yann 0:f30e2135b0db 237 priv->i++;
Yann 0:f30e2135b0db 238 if (priv->i >= priv->p->len) {
Yann 0:f30e2135b0db 239 /* on to the next pbuf */
Yann 0:f30e2135b0db 240 priv->i = 0;
Yann 0:f30e2135b0db 241 if (priv->p->next != NULL && priv->p->next->len > 0) {
Yann 0:f30e2135b0db 242 /* p is a chain, on to the next in the chain */
Yann 0:f30e2135b0db 243 priv->p = priv->p->next;
Yann 0:f30e2135b0db 244 } else {
Yann 0:f30e2135b0db 245 /* p is a single pbuf, set it to NULL so next time a new
Yann 0:f30e2135b0db 246 * pbuf is allocated */
Yann 0:f30e2135b0db 247 priv->p = NULL;
Yann 0:f30e2135b0db 248 }
Yann 0:f30e2135b0db 249 }
Yann 0:f30e2135b0db 250 }
Yann 0:f30e2135b0db 251 }
Yann 0:f30e2135b0db 252
Yann 0:f30e2135b0db 253 return NULL;
Yann 0:f30e2135b0db 254 }
Yann 0:f30e2135b0db 255
Yann 0:f30e2135b0db 256 #if !NO_SYS
Yann 0:f30e2135b0db 257 /**
Yann 0:f30e2135b0db 258 * The SLIP input thread.
Yann 0:f30e2135b0db 259 *
Yann 0:f30e2135b0db 260 * Feed the IP layer with incoming packets
Yann 0:f30e2135b0db 261 *
Yann 0:f30e2135b0db 262 * @param nf the lwip network interface structure for this slipif
Yann 0:f30e2135b0db 263 */
Yann 0:f30e2135b0db 264 static void
Yann 0:f30e2135b0db 265 slipif_loop_thread(void *nf)
Yann 0:f30e2135b0db 266 {
Yann 0:f30e2135b0db 267 struct pbuf *p;
Yann 0:f30e2135b0db 268 struct netif *netif = (struct netif *)nf;
Yann 0:f30e2135b0db 269
Yann 0:f30e2135b0db 270 while (1) {
Yann 0:f30e2135b0db 271 p = slipif_input(netif, SLIP_BLOCK);
Yann 0:f30e2135b0db 272 if (p != NULL) {
Yann 0:f30e2135b0db 273 if (netif->input(p, netif) != ERR_OK) {
Yann 0:f30e2135b0db 274 pbuf_free(p);
Yann 0:f30e2135b0db 275 p = NULL;
Yann 0:f30e2135b0db 276 }
Yann 0:f30e2135b0db 277 }
Yann 0:f30e2135b0db 278 }
Yann 0:f30e2135b0db 279 }
Yann 0:f30e2135b0db 280 #endif /* !NO_SYS */
Yann 0:f30e2135b0db 281
Yann 0:f30e2135b0db 282 /**
Yann 0:f30e2135b0db 283 * SLIP netif initialization
Yann 0:f30e2135b0db 284 *
Yann 0:f30e2135b0db 285 * Call the arch specific sio_open and remember
Yann 0:f30e2135b0db 286 * the opened device in the state field of the netif.
Yann 0:f30e2135b0db 287 *
Yann 0:f30e2135b0db 288 * @param netif the lwip network interface structure for this slipif
Yann 0:f30e2135b0db 289 * @return ERR_OK if serial line could be opened,
Yann 0:f30e2135b0db 290 * ERR_MEM if no memory could be allocated,
Yann 0:f30e2135b0db 291 * ERR_IF is serial line couldn't be opened
Yann 0:f30e2135b0db 292 *
Yann 0:f30e2135b0db 293 * @note netif->num must contain the number of the serial port to open
Yann 0:f30e2135b0db 294 * (0 by default)
Yann 0:f30e2135b0db 295 */
Yann 0:f30e2135b0db 296 err_t
Yann 0:f30e2135b0db 297 slipif_init(struct netif *netif)
Yann 0:f30e2135b0db 298 {
Yann 0:f30e2135b0db 299 struct slipif_priv *priv;
Yann 0:f30e2135b0db 300
Yann 0:f30e2135b0db 301 LWIP_DEBUGF(SLIP_DEBUG, ("slipif_init: netif->num=%"U16_F"\n", (u16_t)netif->num));
Yann 0:f30e2135b0db 302
Yann 0:f30e2135b0db 303 /* Allocate private data */
Yann 0:f30e2135b0db 304 priv = mem_malloc(sizeof(struct slipif_priv));
Yann 0:f30e2135b0db 305 if (!priv) {
Yann 0:f30e2135b0db 306 return ERR_MEM;
Yann 0:f30e2135b0db 307 }
Yann 0:f30e2135b0db 308
Yann 0:f30e2135b0db 309 netif->name[0] = 's';
Yann 0:f30e2135b0db 310 netif->name[1] = 'l';
Yann 0:f30e2135b0db 311 netif->output = slipif_output;
Yann 0:f30e2135b0db 312 netif->mtu = SLIP_MAX_SIZE;
Yann 0:f30e2135b0db 313 netif->flags |= NETIF_FLAG_POINTTOPOINT;
Yann 0:f30e2135b0db 314
Yann 0:f30e2135b0db 315 /* Try to open the serial port (netif->num contains the port number). */
Yann 0:f30e2135b0db 316 priv->sd = sio_open(netif->num);
Yann 0:f30e2135b0db 317 if (!priv->sd) {
Yann 0:f30e2135b0db 318 /* Opening the serial port failed. */
Yann 0:f30e2135b0db 319 mem_free(priv);
Yann 0:f30e2135b0db 320 return ERR_IF;
Yann 0:f30e2135b0db 321 }
Yann 0:f30e2135b0db 322
Yann 0:f30e2135b0db 323 /* Initialize private data */
Yann 0:f30e2135b0db 324 priv->p = NULL;
Yann 0:f30e2135b0db 325 priv->q = NULL;
Yann 0:f30e2135b0db 326 priv->state = SLIP_RECV_NORMAL;
Yann 0:f30e2135b0db 327 priv->i = 0;
Yann 0:f30e2135b0db 328 priv->recved = 0;
Yann 0:f30e2135b0db 329
Yann 0:f30e2135b0db 330 netif->state = priv;
Yann 0:f30e2135b0db 331
Yann 0:f30e2135b0db 332 /* initialize the snmp variables and counters inside the struct netif
Yann 0:f30e2135b0db 333 * ifSpeed: no assumption can be made without knowing more about the
Yann 0:f30e2135b0db 334 * serial line!
Yann 0:f30e2135b0db 335 */
Yann 0:f30e2135b0db 336 NETIF_INIT_SNMP(netif, snmp_ifType_slip, 0);
Yann 0:f30e2135b0db 337
Yann 0:f30e2135b0db 338 /* Create a thread to poll the serial line. */
Yann 0:f30e2135b0db 339 sys_thread_new(SLIPIF_THREAD_NAME, slipif_loop_thread, netif,
Yann 0:f30e2135b0db 340 SLIPIF_THREAD_STACKSIZE, SLIPIF_THREAD_PRIO);
Yann 0:f30e2135b0db 341 return ERR_OK;
Yann 0:f30e2135b0db 342 }
Yann 0:f30e2135b0db 343
Yann 0:f30e2135b0db 344 /**
Yann 0:f30e2135b0db 345 * Polls the serial device and feeds the IP layer with incoming packets.
Yann 0:f30e2135b0db 346 *
Yann 0:f30e2135b0db 347 * @param netif The lwip network interface structure for this slipif
Yann 0:f30e2135b0db 348 */
Yann 0:f30e2135b0db 349 void
Yann 0:f30e2135b0db 350 slipif_poll(struct netif *netif)
Yann 0:f30e2135b0db 351 {
Yann 0:f30e2135b0db 352 struct pbuf *p;
Yann 0:f30e2135b0db 353 struct slipif_priv *priv;
Yann 0:f30e2135b0db 354
Yann 0:f30e2135b0db 355 LWIP_ASSERT("netif != NULL", (netif != NULL));
Yann 0:f30e2135b0db 356 LWIP_ASSERT("netif->state != NULL", (netif->state != NULL));
Yann 0:f30e2135b0db 357
Yann 0:f30e2135b0db 358 priv = netif->state;
Yann 0:f30e2135b0db 359
Yann 0:f30e2135b0db 360 while ((p = slipif_input(netif, SLIP_DONTBLOCK)) != NULL) {
Yann 0:f30e2135b0db 361 if (netif->input(p, netif) != ERR_OK) {
Yann 0:f30e2135b0db 362 pbuf_free(p);
Yann 0:f30e2135b0db 363 }
Yann 0:f30e2135b0db 364 }
Yann 0:f30e2135b0db 365 }
Yann 0:f30e2135b0db 366
Yann 0:f30e2135b0db 367 #endif /* LWIP_HAVE_SLIPIF */