stm32f407VE+enc28j60+lwip2.0.2

　　407自带以太网mac模块，一般外挂一个PHY芯片就可以实现以太网物理层；以下是stm32f407VE+enc28j60+lwip2.0.2实现最基本的以太网通信功能。

1. 新建工程，此处省略1000字。。。
2. 在工程目录下新建一个LWIP文件夹，将lwip-2.0.2.zip解压，将src文件夹里面的core、include、netif文件夹放到LWIP文件夹下。
在LWIP目录下新建一个arch文件夹待用。
3. 在\LWIP\arch根目录下新建cc.h文件，内容如下:

  1 #include "stdio.h"
  2 
  3 typedef unsigned char u8_t;
  4 typedef signed char s8_t;
  5 typedef unsigned short u16_t;
  6 typedef signed short s16_t;
  7 typedef unsigned long u32_t;
  8 typedef signed long s32_t;
  9 
 10 typedef u32_t mem_ptr_t;
 11 
 12 /*************CPU存放数据定义为小段模式******************/
 13 #ifndef BYTE_ORDER
 14 #define BYTE_ORDER LITTLE_ENDIAN
 15 #endif
 16 
 17 /**********使用KEIL/RVMDK开发工具时的宏定义**************/
 18 //#if defined(__arm__) && defined(__ARMCC_VERSION)
 19 #define PACK_STRUCT_BEGIN __packed
 20 #define PACK_STRUCT_STRUCT 
 21 #define PACK_STRUCT_END
 22 #define PACK_STRUCT_FIELD(x) x
 23 /*---define (sn)printf formatters for these lwip types, for lwip DEBUG/STATS--*/
 24 
 25 #define U16_F "4d"
 26 #define S16_F "4d"
 27 #define X16_F "4x"
 28 #define U32_F "8ld"
 29 #define S32_F "8ld"
 30 #define X32_F "8lx"
 31 
 32 #ifndef LWIP_PLATFORM_ASSERT
 33 #define LWIP_PLATFORM_ASSERT(x) \
 34 do \
 35 { printf("Assertion \"%s\" failed at line %d in %s\n", x, __LINE__, __FILE__); \
 36 } while(0)
 37 #endif
 38 
 39 #ifndef LWIP_PLATFORM_DIAG
 40 #define LWIP_PLATFORM_DIAG(x) do {printf x;} while(0)
 41 #endif
 42 4.在LWIP\include根目录下新建一个lwipopts.h文件，内容如下:
 43 #ifndef __LWIPOPTS_H__
 44 #define __LWIPOPTS_H__
 45 
 46 /**
 47 * SYS_LIGHTWEIGHT_PROT==1: if you want inter-task protection for certain
 48 * critical regions during buffer allocation, deallocation and memory
 49 * allocation and deallocation.
 50 */
 51 #define SYS_LIGHTWEIGHT_PROT 0
 52 
 53 /**
 54 * NO_SYS==1: Provides VERY minimal functionality. Otherwise,
 55 * use lwIP facilities.
 56 */
 57 #define NO_SYS 1 // 无操作系统
 58 /**
 59 * NO_SYS_NO_TIMERS==1: Drop support for sys_timeout when NO_SYS==1
 60 * Mainly for compatibility to old versions.
 61 */
 62 #define NO_SYS_NO_TIMERS 1 // 这样就不需要定义sys_now函数
 63 
 64 /* ---------- Memory options ---------- */
 65 /* MEM_ALIGNMENT: should be set to the alignment of the CPU for which
 66 lwIP is compiled. 4 byte alignment -> define MEM_ALIGNMENT to 4, 2
 67 byte alignment -> define MEM_ALIGNMENT to 2. */
 68 #define MEM_ALIGNMENT 4
 69 
 70 /* MEM_SIZE: the size of the heap memory. If the application will send
 71 a lot of data that needs to be copied, this should be set high. */
 72 #define MEM_SIZE (5 * 1024)
 73 
 74 /* MEMP_NUM_PBUF: the number of memp struct pbufs. If the application
 75 sends a lot of data out of ROM (or other static memory), this
 76 should be set high. */
 77 #define MEMP_NUM_PBUF 10
 78 /* MEMP_NUM_UDP_PCB: the number of UDP protocol control blocks. One
 79 per active UDP "connection". */
 80 #define MEMP_NUM_UDP_PCB 6
 81 /* MEMP_NUM_TCP_PCB: the number of simulatenously active TCP
 82 connections. */
 83 #define MEMP_NUM_TCP_PCB 10
 84 /* MEMP_NUM_TCP_PCB_LISTEN: the number of listening TCP
 85 connections. */
 86 #define MEMP_NUM_TCP_PCB_LISTEN 6
 87 /* MEMP_NUM_TCP_SEG: the number of simultaneously queued TCP
 88 segments. */
 89 #define MEMP_NUM_TCP_SEG 12
 90 /* MEMP_NUM_SYS_TIMEOUT: the number of simulateously active
 91 timeouts. */
 92 #define MEMP_NUM_SYS_TIMEOUT 3
 93 
 94 /* ---------- Pbuf options ---------- */
 95 /* PBUF_POOL_SIZE: the number of buffers in the pbuf pool. */
 96 #define PBUF_POOL_SIZE 10
 97 
 98 /* PBUF_POOL_BUFSIZE: the size of each pbuf in the pbuf pool. */
 99 #define PBUF_POOL_BUFSIZE 1500
100 
101 /* ---------- TCP options ---------- */
102 #define LWIP_TCP 1
103 #define TCP_TTL 255
104 
105 /* Controls if TCP should queue segments that arrive out of
106 order. Define to 0 if your device is low on memory. */
107 #define TCP_QUEUE_OOSEQ 0
108 
109 /* TCP Maximum segment size. */
110 #define TCP_MSS (1500 - 40) /* TCP_MSS = (Ethernet MTU - IP header size - TCP header size) */
111 
112 /* TCP sender buffer space (bytes). */
113 #define TCP_SND_BUF (2 * TCP_MSS)
114 
115 /* TCP sender buffer space (pbufs). This must be at least = 2 *
116 TCP_SND_BUF/TCP_MSS for things to work. */
117 #define TCP_SND_QUEUELEN (6 * TCP_SND_BUF) / TCP_MSS
118 
119 /* TCP receive window. */
120 #define TCP_WND (2 * TCP_MSS)
121 
122 /* ---------- ICMP options ---------- */
123 #define LWIP_ICMP 1
124 
125 /* ---------- DHCP options ---------- */
126 /* Define LWIP_DHCP to 1 if you want DHCP configuration of
127 interfaces. DHCP is not implemented in lwIP 0.5.1, however, so
128 turning this on does currently not work. */
129 #define LWIP_DHCP 0
130 
131 /* ---------- UDP options ---------- */
132 #define LWIP_UDP 1
133 #define UDP_TTL 255
134 
135 /* ---------- Statistics options ---------- */
136 #define LWIP_STATS 0
137 #define LWIP_PROVIDE_ERRNO 1
138 
139 // LWIP_NETCONN==1: Enable Netconn API (require to use api_lib.c)
140 #define LWIP_NETCONN 0
141 
142 // LWIP_SOCKET==1: Enable Socket API (require to use sockets.c)
143 #define LWIP_SOCKET 0
144 
145 // 这个必须要定义, 否则在执行lwip_init函数时会在串口中提示:
146 // Assertion "Struct packing not implemented correctly. Check your lwIP port." failed at line 345 in Library\lwip\core\init.c
147 #define PACK_STRUCT_BEGIN __packed
148 /*******************************************************************************************************************/
149 #define LWIP_DEBUG 1
150 #define LWIP_DBG_TYPES_ON LWIP_DBG_OFF
151 
152 /**
153 * ETHARP_DEBUG: Enable debugging in etharp.c.
154 */
155 #define ETHARP_DEBUG LWIP_DBG_OFF
156 
157 /**
158 * NETIF_DEBUG: Enable debugging in netif.c.
159 */
160 #define NETIF_DEBUG LWIP_DBG_OFF
161 
162 /**
163 * PBUF_DEBUG: Enable debugging in pbuf.c.
164 */
165 #define PBUF_DEBUG LWIP_DBG_OFF
166 
167 /**
168 * API_LIB_DEBUG: Enable debugging in api_lib.c.
169 */
170 #define API_LIB_DEBUG LWIP_DBG_OFF
171 
172 /**
173 * API_MSG_DEBUG: Enable debugging in api_msg.c.
174 */
175 #define API_MSG_DEBUG LWIP_DBG_OFF
176 
177 /**
178 * SOCKETS_DEBUG: Enable debugging in sockets.c.
179 */
180 #define SOCKETS_DEBUG LWIP_DBG_OFF
181 
182 /**
183 * ICMP_DEBUG: Enable debugging in icmp.c.
184 */
185 #define ICMP_DEBUG LWIP_DBG_OFF
186 
187 /**
188 * IGMP_DEBUG: Enable debugging in igmp.c.
189 */
190 #define IGMP_DEBUG LWIP_DBG_OFF
191 
192 /**
193 * INET_DEBUG: Enable debugging in inet.c.
194 */
195 #define INET_DEBUG LWIP_DBG_OFF
196 
197 /**
198 * IP_DEBUG: Enable debugging for IP.
199 */
200 #define IP_DEBUG LWIP_DBG_OFF
201 
202 /**
203 * IP_REASS_DEBUG: Enable debugging in ip_frag.c for both frag & reass.
204 */
205 #define IP_REASS_DEBUG LWIP_DBG_OFF
206 /**
207 * RAW_DEBUG: Enable debugging in raw.c.
208 */
209 #define RAW_DEBUG LWIP_DBG_OFF
210 
211 /**
212 * MEM_DEBUG: Enable debugging in mem.c.
213 */
214 #define MEM_DEBUG LWIP_DBG_OFF
215 
216 /**
217 * MEMP_DEBUG: Enable debugging in memp.c.
218 */
219 #define MEMP_DEBUG LWIP_DBG_OFF
220 
221 /**
222 * SYS_DEBUG: Enable debugging in sys.c.
223 */
224 #define SYS_DEBUG LWIP_DBG_OFF
225 
226 /**
227 * TCP_DEBUG: Enable debugging for TCP.
228 */
229 #define TCP_DEBUG LWIP_DBG_OFF
230 
231 /**
232 * TCP_INPUT_DEBUG: Enable debugging in tcp_in.c for incoming debug.
233 */
234 #define TCP_INPUT_DEBUG LWIP_DBG_OFF
235 /**
236 * TCP_FR_DEBUG: Enable debugging in tcp_in.c for fast retransmit.
237 */
238 #define TCP_FR_DEBUG LWIP_DBG_OFF
239 
240 /**
241 * TCP_RTO_DEBUG: Enable debugging in TCP for retransmit
242 * timeout.
243 */
244 #define TCP_RTO_DEBUG LWIP_DBG_OFF
245 
246 /**
247 * TCP_CWND_DEBUG: Enable debugging for TCP congestion window.
248 */
249 #define TCP_CWND_DEBUG LWIP_DBG_OFF
250 
251 /**
252 * TCP_WND_DEBUG: Enable debugging in tcp_in.c for window updating.
253 */
254 #define TCP_WND_DEBUG LWIP_DBG_OFF
255 
256 /**
257 * TCP_OUTPUT_DEBUG: Enable debugging in tcp_out.c output functions.
258 */
259 #define TCP_OUTPUT_DEBUG LWIP_DBG_OFF
260 /**
261 * TCP_RST_DEBUG: Enable debugging for TCP with the RST message.
262 */
263 #define TCP_RST_DEBUG LWIP_DBG_OFF
264 
265 /**
266 * TCP_QLEN_DEBUG: Enable debugging for TCP queue lengths.
267 */
268 #define TCP_QLEN_DEBUG LWIP_DBG_OFF
269 
270 /**
271 * UDP_DEBUG: Enable debugging in UDP.
272 */
273 #define UDP_DEBUG LWIP_DBG_OFF
274 
275 /**
276 * TCPIP_DEBUG: Enable debugging in tcpip.c.
277 */
278 #define TCPIP_DEBUG LWIP_DBG_OFF
279 
280 /**
281 * PPP_DEBUG: Enable debugging for PPP.
282 */
283 #define PPP_DEBUG LWIP_DBG_OFF
284 
285 /**
286 * SLIP_DEBUG: Enable debugging in slipif.c.
287 */
288 #define SLIP_DEBUG LWIP_DBG_OFF
289 
290 /**
291 * DHCP_DEBUG: Enable debugging in dhcp.c.
292 */
293 #define DHCP_DEBUG LWIP_DBG_OFF
294 
295 /**
296 * AUTOIP_DEBUG: Enable debugging in autoip.c.
297 */
298 #define AUTOIP_DEBUG LWIP_DBG_OFF
299 
300 /**
301 * SNMP_MSG_DEBUG: Enable debugging for SNMP messages.
302 */
303 #define SNMP_MSG_DEBUG LWIP_DBG_OFF
304 
305 /**
306 * SNMP_MIB_DEBUG: Enable debugging for SNMP MIBs.
307 */
308 #define SNMP_MIB_DEBUG LWIP_DBG_OFF
309 
310 /**
311 * DNS_DEBUG: Enable debugging for DNS.
312 */
313 #define DNS_DEBUG LWIP_DBG_OFF
314 #endif /* __LWIPOPTS_H__ */

cc.h

4.在LWIP\include根目录下新建一个lwipopts.h文件，内容如下:

  1 #ifndef __LWIPOPTS_H__
  2 #define __LWIPOPTS_H__
  3 
  4 /**
  5 * SYS_LIGHTWEIGHT_PROT==1: if you want inter-task protection for certain
  6 * critical regions during buffer allocation, deallocation and memory
  7 * allocation and deallocation.
  8 */
  9 #define SYS_LIGHTWEIGHT_PROT 0
 10 
 11 /**
 12 * NO_SYS==1: Provides VERY minimal functionality. Otherwise,
 13 * use lwIP facilities.
 14 */
 15 #define NO_SYS 1 // 无操作系统
 16 /**
 17 * NO_SYS_NO_TIMERS==1: Drop support for sys_timeout when NO_SYS==1
 18 * Mainly for compatibility to old versions.
 19 */
 20 #define NO_SYS_NO_TIMERS 1 // 这样就不需要定义sys_now函数
 21 
 22 /* ---------- Memory options ---------- */
 23 /* MEM_ALIGNMENT: should be set to the alignment of the CPU for which
 24 lwIP is compiled. 4 byte alignment -> define MEM_ALIGNMENT to 4, 2
 25 byte alignment -> define MEM_ALIGNMENT to 2. */
 26 #define MEM_ALIGNMENT 4
 27 
 28 /* MEM_SIZE: the size of the heap memory. If the application will send
 29 a lot of data that needs to be copied, this should be set high. */
 30 #define MEM_SIZE (5 * 1024)
 31 
 32 /* MEMP_NUM_PBUF: the number of memp struct pbufs. If the application
 33 sends a lot of data out of ROM (or other static memory), this
 34 should be set high. */
 35 #define MEMP_NUM_PBUF 10
 36 /* MEMP_NUM_UDP_PCB: the number of UDP protocol control blocks. One
 37 per active UDP "connection". */
 38 #define MEMP_NUM_UDP_PCB 6
 39 /* MEMP_NUM_TCP_PCB: the number of simulatenously active TCP
 40 connections. */
 41 #define MEMP_NUM_TCP_PCB 10
 42 /* MEMP_NUM_TCP_PCB_LISTEN: the number of listening TCP
 43 connections. */
 44 #define MEMP_NUM_TCP_PCB_LISTEN 6
 45 /* MEMP_NUM_TCP_SEG: the number of simultaneously queued TCP
 46 segments. */
 47 #define MEMP_NUM_TCP_SEG 12
 48 /* MEMP_NUM_SYS_TIMEOUT: the number of simulateously active
 49 timeouts. */
 50 #define MEMP_NUM_SYS_TIMEOUT 3
 51 
 52 /* ---------- Pbuf options ---------- */
 53 /* PBUF_POOL_SIZE: the number of buffers in the pbuf pool. */
 54 #define PBUF_POOL_SIZE 10
 55 
 56 /* PBUF_POOL_BUFSIZE: the size of each pbuf in the pbuf pool. */
 57 #define PBUF_POOL_BUFSIZE 1500
 58 
 59 /* ---------- TCP options ---------- */
 60 #define LWIP_TCP 1
 61 #define TCP_TTL 255
 62 
 63 /* Controls if TCP should queue segments that arrive out of
 64 order. Define to 0 if your device is low on memory. */
 65 #define TCP_QUEUE_OOSEQ 0
 66 
 67 /* TCP Maximum segment size. */
 68 #define TCP_MSS (1500 - 40) /* TCP_MSS = (Ethernet MTU - IP header size - TCP header size) */
 69 
 70 /* TCP sender buffer space (bytes). */
 71 #define TCP_SND_BUF (2 * TCP_MSS)
 72 
 73 /* TCP sender buffer space (pbufs). This must be at least = 2 *
 74 TCP_SND_BUF/TCP_MSS for things to work. */
 75 #define TCP_SND_QUEUELEN (6 * TCP_SND_BUF) / TCP_MSS
 76 
 77 /* TCP receive window. */
 78 #define TCP_WND (2 * TCP_MSS)
 79 
 80 /* ---------- ICMP options ---------- */
 81 #define LWIP_ICMP 1
 82 
 83 /* ---------- DHCP options ---------- */
 84 /* Define LWIP_DHCP to 1 if you want DHCP configuration of
 85 interfaces. DHCP is not implemented in lwIP 0.5.1, however, so
 86 turning this on does currently not work. */
 87 #define LWIP_DHCP 0
 88 
 89 /* ---------- UDP options ---------- */
 90 #define LWIP_UDP 1
 91 #define UDP_TTL 255
 92 
 93 /* ---------- Statistics options ---------- */
 94 #define LWIP_STATS 0
 95 #define LWIP_PROVIDE_ERRNO 1
 96 
 97 // LWIP_NETCONN==1: Enable Netconn API (require to use api_lib.c)
 98 #define LWIP_NETCONN 0
 99 
100 // LWIP_SOCKET==1: Enable Socket API (require to use sockets.c)
101 #define LWIP_SOCKET 0
102 
103 // 这个必须要定义, 否则在执行lwip_init函数时会在串口中提示:
104 // Assertion "Struct packing not implemented correctly. Check your lwIP port." failed at line 345 in Library\lwip\core\init.c
105 #define PACK_STRUCT_BEGIN __packed
106 /*******************************************************************************************************************/
107 #define LWIP_DEBUG 1
108 #define LWIP_DBG_TYPES_ON LWIP_DBG_OFF
109 
110 /**
111 * ETHARP_DEBUG: Enable debugging in etharp.c.
112 */
113 #define ETHARP_DEBUG LWIP_DBG_OFF
114 
115 /**
116 * NETIF_DEBUG: Enable debugging in netif.c.
117 */
118 #define NETIF_DEBUG LWIP_DBG_OFF
119 
120 /**
121 * PBUF_DEBUG: Enable debugging in pbuf.c.
122 */
123 #define PBUF_DEBUG LWIP_DBG_OFF
124 
125 /**
126 * API_LIB_DEBUG: Enable debugging in api_lib.c.
127 */
128 #define API_LIB_DEBUG LWIP_DBG_OFF
129 
130 /**
131 * API_MSG_DEBUG: Enable debugging in api_msg.c.
132 */
133 #define API_MSG_DEBUG LWIP_DBG_OFF
134 
135 /**
136 * SOCKETS_DEBUG: Enable debugging in sockets.c.
137 */
138 #define SOCKETS_DEBUG LWIP_DBG_OFF
139 
140 /**
141 * ICMP_DEBUG: Enable debugging in icmp.c.
142 */
143 #define ICMP_DEBUG LWIP_DBG_OFF
144 
145 /**
146 * IGMP_DEBUG: Enable debugging in igmp.c.
147 */
148 #define IGMP_DEBUG LWIP_DBG_OFF
149 
150 /**
151 * INET_DEBUG: Enable debugging in inet.c.
152 */
153 #define INET_DEBUG LWIP_DBG_OFF
154 
155 /**
156 * IP_DEBUG: Enable debugging for IP.
157 */
158 #define IP_DEBUG LWIP_DBG_OFF
159 
160 /**
161 * IP_REASS_DEBUG: Enable debugging in ip_frag.c for both frag & reass.
162 */
163 #define IP_REASS_DEBUG LWIP_DBG_OFF
164 /**
165 * RAW_DEBUG: Enable debugging in raw.c.
166 */
167 #define RAW_DEBUG LWIP_DBG_OFF
168 
169 /**
170 * MEM_DEBUG: Enable debugging in mem.c.
171 */
172 #define MEM_DEBUG LWIP_DBG_OFF
173 
174 /**
175 * MEMP_DEBUG: Enable debugging in memp.c.
176 */
177 #define MEMP_DEBUG LWIP_DBG_OFF
178 
179 /**
180 * SYS_DEBUG: Enable debugging in sys.c.
181 */
182 #define SYS_DEBUG LWIP_DBG_OFF
183 
184 /**
185 * TCP_DEBUG: Enable debugging for TCP.
186 */
187 #define TCP_DEBUG LWIP_DBG_OFF
188 
189 /**
190 * TCP_INPUT_DEBUG: Enable debugging in tcp_in.c for incoming debug.
191 */
192 #define TCP_INPUT_DEBUG LWIP_DBG_OFF
193 /**
194 * TCP_FR_DEBUG: Enable debugging in tcp_in.c for fast retransmit.
195 */
196 #define TCP_FR_DEBUG LWIP_DBG_OFF
197 
198 /**
199 * TCP_RTO_DEBUG: Enable debugging in TCP for retransmit
200 * timeout.
201 */
202 #define TCP_RTO_DEBUG LWIP_DBG_OFF
203 
204 /**
205 * TCP_CWND_DEBUG: Enable debugging for TCP congestion window.
206 */
207 #define TCP_CWND_DEBUG LWIP_DBG_OFF
208 
209 /**
210 * TCP_WND_DEBUG: Enable debugging in tcp_in.c for window updating.
211 */
212 #define TCP_WND_DEBUG LWIP_DBG_OFF
213 
214 /**
215 * TCP_OUTPUT_DEBUG: Enable debugging in tcp_out.c output functions.
216 */
217 #define TCP_OUTPUT_DEBUG LWIP_DBG_OFF
218 /**
219 * TCP_RST_DEBUG: Enable debugging for TCP with the RST message.
220 */
221 #define TCP_RST_DEBUG LWIP_DBG_OFF
222 
223 /**
224 * TCP_QLEN_DEBUG: Enable debugging for TCP queue lengths.
225 */
226 #define TCP_QLEN_DEBUG LWIP_DBG_OFF
227 
228 /**
229 * UDP_DEBUG: Enable debugging in UDP.
230 */
231 #define UDP_DEBUG LWIP_DBG_OFF
232 
233 /**
234 * TCPIP_DEBUG: Enable debugging in tcpip.c.
235 */
236 #define TCPIP_DEBUG LWIP_DBG_OFF
237 
238 /**
239 * PPP_DEBUG: Enable debugging for PPP.
240 */
241 #define PPP_DEBUG LWIP_DBG_OFF
242 
243 /**
244 * SLIP_DEBUG: Enable debugging in slipif.c.
245 */
246 #define SLIP_DEBUG LWIP_DBG_OFF
247 
248 /**
249 * DHCP_DEBUG: Enable debugging in dhcp.c.
250 */
251 #define DHCP_DEBUG LWIP_DBG_OFF
252 
253 /**
254 * AUTOIP_DEBUG: Enable debugging in autoip.c.
255 */
256 #define AUTOIP_DEBUG LWIP_DBG_OFF
257 
258 /**
259 * SNMP_MSG_DEBUG: Enable debugging for SNMP messages.
260 */
261 #define SNMP_MSG_DEBUG LWIP_DBG_OFF
262 
263 /**
264 * SNMP_MIB_DEBUG: Enable debugging for SNMP MIBs.
265 */
266 #define SNMP_MIB_DEBUG LWIP_DBG_OFF
267 
268 /**
269 * DNS_DEBUG: Enable debugging for DNS.
270 */
271 #define DNS_DEBUG LWIP_DBG_OFF
272 #endif /* __LWIPOPTS_H__ */

lwipopt.h

5.修改\LWIP\netif目录下的ethernetif.c文件，按中文提示修改:

  1 /**
  2 * @file
  3 * Ethernet Interface Skeleton
  4 *
  5 */
  6 
  7 /*
  8 * Copyright (c) 2001-2004 Swedish Institute of Computer Science.
  9 * All rights reserved.
 10 *
 11 * Redistribution and use in source and binary forms, with or without modification,
 12 * are permitted provided that the following conditions are met:
 13 *
 14 * 1. Redistributions of source code must retain the above copyright notice,
 15 * this list of conditions and the following disclaimer.
 16 * 2. Redistributions in binary form must reproduce the above copyright notice,
 17 * this list of conditions and the following disclaimer in the documentation
 18 * and/or other materials provided with the distribution.
 19 * 3. The name of the author may not be used to endorse or promote products
 20 * derived from this software without specific prior written permission.
 21 *
 22 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
 23 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
 24 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT
 25 * SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
 26 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT
 27 * OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
 28 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
 29 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
 30 * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY
 31 * OF SUCH DAMAGE.
 32 *
 33 * This file is part of the lwIP TCP/IP stack.
 34 *
 35 * Author: Adam Dunkels 
 36 *
 37 */
 38 
 39 /*
 40 * This file is a skeleton for developing Ethernet network interface
 41 * drivers for lwIP. Add code to the low_level functions and do a
 42 * search-and-replace for the word "ethernetif" to replace it with
 43 * something that better describes your network interface.
 44 */
 45 
 46 #include "lwip/opt.h"
 47 
 48 /*#if 0*/ /* don't build, this is only a skeleton, see previous comment */
 49 #if 1    //允许编译该文件
 50 
 51 #include "lwip/def.h"
 52 #include "lwip/mem.h"
 53 #include "lwip/pbuf.h"
 54 #include "lwip/stats.h"
 55 #include "lwip/snmp.h"
 56 #include "lwip/ethip6.h"
 57 #include "lwip/etharp.h"
 58 #include "netif/ppp/pppoe.h"
 59 
 60 /* Define those to better describe your network interface. */
 61 #include "enc28j60.h"    //包含enc28j60驱动
 62 #define IFNAME0 'e'
 63 #define IFNAME1 'n'
 64 //定义接收发送Buff
 65 unsigned char Rx_Data_Buff[1520*2+1];
 66 unsigned char Tx_Data_Buff[1520*2];
 67 
 68 /**
 69 * Helper struct to hold private data used to operate your ethernet interface.
 70 * Keeping the ethernet address of the MAC in this struct is not necessary
 71 * as it is already kept in the struct netif.
 72 * But this is only an example, anyway...
 73 */
 74 struct ethernetif {
 75 struct eth_addr *ethaddr;
 76 /* Add whatever per-interface state that is needed here. */
 77 };
 78 
 79 /* Forward declarations. */
 80 //去掉静态定义
 81 /*static*/ void ethernetif_input(struct netif *netif);
 82 
 83 /**
 84 * In this function, the hardware should be initialized.
 85 * Called from ethernetif_init().
 86 *
 87 * @param netif the already initialized lwip network interface structure
 88 * for this ethernetif
 89 */
 90 static void
 91 low_level_init(struct netif *netif)
 92 {
 93 struct ethernetif *ethernetif = netif->state;
 94 
 95 /* set MAC hardware address length */
 96 netif->hwaddr_len = ETHARP_HWADDR_LEN;
 97 
 98 /* set MAC hardware address */
 99 //设置硬件MAC地址，只有不与同网络内的其他设备同名就好
100 netif->hwaddr[0] = 0x00;
101 netif->hwaddr[1] = 'D';
102 netif->hwaddr[2] = 'M';
103 netif->hwaddr[3] = 'N';
104 netif->hwaddr[4] = 'E';
105 netif->hwaddr[5] = 'T';
106 
107 /* maximum transfer unit */
108 netif->mtu = 1500;
109 
110 /* device capabilities */
111 /* don't set NETIF_FLAG_ETHARP if this device is not an ethernet one */
112 netif->flags = NETIF_FLAG_BROADCAST | NETIF_FLAG_ETHARP | NETIF_FLAG_LINK_UP|NETIF_FLAG_UP;
113 
114 #if LWIP_IPV6 && LWIP_IPV6_MLD
115 /*
116 * For hardware/netifs that implement MAC filtering.
117 * All-nodes link-local is handled by default, so we must let the hardware know
118 * to allow multicast packets in.
119 * Should set mld_mac_filter previously. */
120 if (netif->mld_mac_filter != NULL) {
121 ip6_addr_t ip6_allnodes_ll;
122 ip6_addr_set_allnodes_linklocal(&ip6_allnodes_ll);
123 netif->mld_mac_filter(netif, &ip6_allnodes_ll, NETIF_ADD_MAC_FILTER);
124 }
125 #endif /* LWIP_IPV6 && LWIP_IPV6_MLD */
126 
127 /* Do whatever else is needed to initialize interface. */
128 enc28j60Init(netif->hwaddr);    //初始化enc28j60
129 }
130 
131 /**
132 * This function should do the actual transmission of the packet. The packet is
133 * contained in the pbuf that is passed to the function. This pbuf
134 * might be chained.
135 *
136 * @param netif the lwip network interface structure for this ethernetif
137 * @param p the MAC packet to send (e.g. IP packet including MAC addresses and type)
138 * @return ERR_OK if the packet could be sent
139 * an err_t value if the packet couldn't be sent
140 *
141 * @note Returning ERR_MEM here if a DMA queue of your MAC is full can lead to
142 * strange results. You might consider waiting for space in the DMA queue
143 * to become available since the stack doesn't retry to send a packet
144 * dropped because of memory failure (except for the TCP timers).
145 */
146 
147 static err_t
148 low_level_output(struct netif *netif, struct pbuf *p)
149 {
150 struct ethernetif *ethernetif = netif->state;
151 struct pbuf *q;
152 int i = 0;
153 // initiate transfer();    //屏蔽
154 
155 #if ETH_PAD_SIZE
156 pbuf_header(p, -ETH_PAD_SIZE); /* drop the padding word */
157 #endif
158 
159 for (q = p; q != NULL; q = q->next) {
160 /* Send the data from the pbuf to the interface, one pbuf at a
161 time. The size of the data in each pbuf is kept in the ->len
162 variable. */
163 //send data from(q->payload, q->len);
164 //将待发送数据包copy到发送Buff
165 memcpy(&Tx_Data_Buff[i],q->payload,q->len);
166 i = i+q->len;
167 }
168 
169 // signal that packet should be sent();
170 enc28j60PacketSend(i,Tx_Data_Buff);    //调用底层驱动，发送数据包
171 MIB2_STATS_NETIF_ADD(netif, ifoutoctets, p->tot_len);
172 if (((u8_t*)p->payload)[0] & 1) {
173 /* broadcast or multicast packet*/
174 MIB2_STATS_NETIF_INC(netif, ifoutnucastpkts);
175 } else {
176 /* unicast packet */
177 MIB2_STATS_NETIF_INC(netif, ifoutucastpkts);
178 }
179 /* increase ifoutdiscards or ifouterrors on error */
180 
181 #if ETH_PAD_SIZE
182 pbuf_header(p, ETH_PAD_SIZE); /* reclaim the padding word */
183 #endif
184 
185 LINK_STATS_INC(link.xmit);
186 
187 return ERR_OK;
188 }
189 
190 /**
191 * Should allocate a pbuf and transfer the bytes of the incoming
192 * packet from the interface into the pbuf.
193 *
194 * @param netif the lwip network interface structure for this ethernetif
195 * @return a pbuf filled with the received packet (including MAC header)
196 * NULL on memory error
197 */
198 static struct pbuf *
199 low_level_input(struct netif *netif)
200 {
201 struct ethernetif *ethernetif = netif->state;
202 struct pbuf *p, *q;
203 u16_t len;
204 int i = 0;
205 /* Obtain the size of the packet and put it into the "len"
206 variable. */
207 len = enc28j60PacketReceive(1520*2,Rx_Data_Buff);    //返回接收数据长度
208 
209 #if ETH_PAD_SIZE
210 len += ETH_PAD_SIZE; /* allow room for Ethernet padding */
211 #endif
212 
213 /* We allocate a pbuf chain of pbufs from the pool. */
214 p = pbuf_alloc(PBUF_RAW, len, PBUF_POOL);
215 
216 if (p != NULL) {
217 
218 #if ETH_PAD_SIZE
219 pbuf_header(p, -ETH_PAD_SIZE); /* drop the padding word */
220 #endif
221 
222 /* We iterate over the pbuf chain until we have read the entire
223 * packet into the pbuf. */
224 for (q = p; q != NULL; q = q->next) {
225 /* Read enough bytes to fill this pbuf in the chain. The
226 * available data in the pbuf is given by the q->len
227 * variable.
228 * This does not necessarily have to be a memcpy, you can also preallocate
229 * pbufs for a DMA-enabled MAC and after receiving truncate it to the
230 * actually received size. In this case, ensure the tot_len member of the
231 * pbuf is the sum of the chained pbuf len members.
232 */
233 // read data into(q->payload, q->len);    //屏蔽
234 //将接收到的数据复制到pbuf的数据区
235 memcpy((u8_t*)q->payload,(u8_t*)&Rx_Data_Buff[i],q->len);
236 i = i+q->len;
237 }
238 // acknowledge that packet has been read();//屏蔽
239 //相等时表明到了数据尾
240 if(i != p->tot_len)
241 {
242 LWIP_DEBUGF(NETIF_DEBUG,("ethernetif_input:recv ERROR"));
243 return 0;
244 }
245 MIB2_STATS_NETIF_ADD(netif, ifinoctets, p->tot_len);
246 if (((u8_t*)p->payload)[0] & 1) {
247 /* broadcast or multicast packet*/
248 MIB2_STATS_NETIF_INC(netif, ifinnucastpkts);
249 } else {
250 /* unicast packet*/
251 MIB2_STATS_NETIF_INC(netif, ifinucastpkts);
252 }
253 #if ETH_PAD_SIZE
254 pbuf_header(p, ETH_PAD_SIZE); /* reclaim the padding word */
255 #endif
256 
257 LINK_STATS_INC(link.recv);
258 } else {
259 // drop packet();    屏蔽
260 LINK_STATS_INC(link.memerr);
261 LINK_STATS_INC(link.drop);
262 MIB2_STATS_NETIF_INC(netif, ifindiscards);
263 }
264 
265 return p;
266 }
267 
268 /**
269 * This function should be called when a packet is ready to be read
270 * from the interface. It uses the function low_level_input() that
271 * should handle the actual reception of bytes from the network
272 * interface. Then the type of the received packet is determined and
273 * the appropriate input function is called.
274 *
275 * @param netif the lwip network interface structure for this ethernetif
276 */
277 //去掉静态定义
278 /*static*/ void
279 ethernetif_input(struct netif *netif)
280 {
281 struct ethernetif *ethernetif;
282 struct eth_hdr *ethhdr;
283 struct pbuf *p;
284 
285 ethernetif = netif->state;
286 
287 /* move received packet into a new pbuf */
288 p = low_level_input(netif);
289 /* if no packet could be read, silently ignore this */
290 if (p != NULL) {
291 /* pass all packets to ethernet_input, which decides what packets it supports */
292 if (netif->input(p, netif) != ERR_OK) {
293 LWIP_DEBUGF(NETIF_DEBUG, ("ethernetif_input: IP input error\n"));
294 pbuf_free(p);
295 p = NULL;
296 }
297 }
298 }
299 
300 /**
301 * Should be called at the beginning of the program to set up the
302 * network interface. It calls the function low_level_init() to do the
303 * actual setup of the hardware.
304 *
305 * This function should be passed as a parameter to netif_add().
306 *
307 * @param netif the lwip network interface structure for this ethernetif
308 * @return ERR_OK if the loopif is initialized
309 * ERR_MEM if private data couldn't be allocated
310 * any other err_t on error
311 */
312 err_t
313 ethernetif_init(struct netif *netif)
314 {
315 struct ethernetif *ethernetif;
316 
317 LWIP_ASSERT("netif != NULL", (netif != NULL));
318 
319 ethernetif = mem_malloc(sizeof(struct ethernetif));
320 if (ethernetif == NULL) {
321 LWIP_DEBUGF(NETIF_DEBUG, ("ethernetif_init: out of memory\n"));
322 return ERR_MEM;
323 }
324 
325 #if LWIP_NETIF_HOSTNAME
326 /* Initialize interface hostname */
327 netif->hostname = "lwip";
328 #endif /* LWIP_NETIF_HOSTNAME */
329 
330 /*
331 * Initialize the snmp variables and counters inside the struct netif.
332 * The last argument should be replaced with your link speed, in units
333 * of bits per second.
334 */
335 MIB2_INIT_NETIF(netif, snmp_ifType_ethernet_csmacd, LINK_SPEED_OF_YOUR_NETIF_IN_BPS);
336 
337 netif->state = ethernetif;
338 netif->name[0] = IFNAME0;
339 netif->name[1] = IFNAME1;
340 /* We directly use etharp_output() here to save a function call.
341 * You can instead declare your own function an call etharp_output()
342 * from it if you have to do some checks before sending (e.g. if link
343 * is available...) */
344 netif->output = etharp_output;
345 #if LWIP_IPV6
346 netif->output_ip6 = ethip6_output;
347 #endif /* LWIP_IPV6 */
348 netif->linkoutput = low_level_output;
349 
350 ethernetif->ethaddr = (struct eth_addr *)&(netif->hwaddr[0]);
351 
352 /* initialize the hardware */
353 low_level_init(netif);
354 
355 return ERR_OK;
356 }
357 #endif /* 0 */

ethernetif.c

6.将\LWIP\include\lwip目录下的arch.h文件中的#define LWIP_NO_STDINT_H 改成1，不然会与cc.h文件中的类型定义重复，编译出错

7.将enc28j60驱动程序加入工程中，以下文件为网上借鉴，亲测可用:

  1 /******************************************************************************
  2  * vim:sw=8:ts=8:si:et
  3  * To use the above modeline in vim you must have "set modeline" in your .vimrc
  4  * Author: Guido Socher 
  5  * Copyright: GPL V2
  6  * http://www.gnu.org/licenses/gpl.html
  7  *
  8  * Based on the enc28j60.c file from the AVRlib library by Pascal Stang.
  9  * For AVRlib See http://www.procyonengineering.com/
 10  * Used with explicit permission of Pascal Stang.
 11  *
 12  * Title: Microchip ENC28J60 Ethernet Interface Driver
 13  * Chip type           : ATMEGA88 with ENC28J60
 14  *******************************************************************************/
 15 
 16 #include "ENC28J60.H" 
 17 #include "SPI.H"
 18 
 19 static u8 Enc28j60Bank;
 20 static u16 NextPacketPtr;
 21 
 22 /*
 23  * º¯ÊýÃû£ºenc28j60ReadOp
 24  * ÃèÊö  £º¶Á¿ØÖƼĴæÆ÷
 25  * ÊäÈë  £º¶ÁÖ¸ÁµØÖ·
 26  * Êä³ö  £º¼Ä´æÆ÷ÄÚÈÝ    
 27  */
 28 u8 enc28j60ReadOp(u8 op, u8 address)
 29 {
 30    u8 dat = 0;
 31 
 32    ENC28J60_CSL();
 33 
 34    dat = op | (address & ADDR_MASK);
 35    ENC_SPI_ReadWrite(dat);
 36    dat = ENC_SPI_ReadWrite(0xFF);
 37    // do dummy read if needed (for mac and mii, see datasheet page 29)
 38    if (address & 0x80)
 39    {
 40       dat = ENC_SPI_ReadWrite(0xFF);
 41    }
 42    // release CS
 43    ENC28J60_CSH();
 44    return dat;
 45 }
 46 
 47 /*
 48  * º¯ÊýÃû£ºenc28j60WriteOp
 49  * ÃèÊö  £ºÏòÒÔÌ«Íø¿ØÖÆÆ÷дÈëÃüÁî
 50  * ÊäÈë  £ºÎÞ
 51  * Êä³ö  £ºÎÞ    
 52  */
 53 void enc28j60WriteOp(u8 op, u8 address, u8 data)
 54 {
 55    u8 dat = 0;
 56 
 57    ENC28J60_CSL();
 58    // issue write command
 59    dat = op | (address & ADDR_MASK);
 60    ENC_SPI_ReadWrite(dat);
 61    // write data
 62    dat = data;
 63    ENC_SPI_ReadWrite(dat);
 64    ENC28J60_CSH();
 65 }
 66 
 67 /*
 68  * º¯ÊýÃû£ºenc28j60ReadBuffer
 69  * ÃèÊö  £º¶ÁÈ¡bufferµÄÊý¾Ý
 70  * ÊäÈë  £ºÊý¾Ý³¤¶È£¬´æ·ÅÊý¾ÝµÄÖ¸Õë
 71  * Êä³ö  £ºÎÞ    
 72  */
 73 void enc28j60ReadBuffer(u16 len, u8* data)
 74 {
 75    ENC28J60_CSL();
 76    // issue read command
 77    ENC_SPI_ReadWrite(ENC28J60_READ_BUF_MEM);
 78    while (len--)
 79    {
 80       *data++ = (u8) ENC_SPI_ReadWrite(0);
 81    }
 82    *data = '\0';
 83    ENC28J60_CSH();
 84 }
 85 
 86 /*
 87  * º¯ÊýÃû£ºenc28j60WriteBuffer
 88  * ÃèÊö  £ºÏòbufferдÈëÊý¾Ý
 89  * ÊäÈë  £ºÊý¾Ý³¤¶È£¬´æ·ÅÊý¾ÝµÄÖ¸Õë
 90  * Êä³ö  £ºÎÞ    
 91  */
 92 void enc28j60WriteBuffer(u16 len, u8* data)
 93 {
 94    ENC28J60_CSL();
 95    // issue write command
 96    ENC_SPI_ReadWrite(ENC28J60_WRITE_BUF_MEM);
 97 
 98    while (len--)
 99    {
100       ENC_SPI_ReadWrite(*data++);
101    }
102    ENC28J60_CSH();
103 }
104 
105 /*
106  * º¯ÊýÃû£ºenc28j60SetBank
107  * ÃèÊö  £ºÑ¡¶¨½«Òª²Ù×÷µÄbank
108  * ÊäÈë  £º´øÓÐbankÆÁ±ÎÓòµÄ²ÎÊý
109  * Êä³ö  £ºÎÞ    
110  */
111 void enc28j60SetBank(u8 address)
112 {
113    // set the bank (if needed)
114    if ((address & BANK_MASK) != Enc28j60Bank)
115    {
116       // set the bank
117       enc28j60WriteOp(ENC28J60_BIT_FIELD_CLR, ECON1, (ECON1_BSEL1 | ECON1_BSEL0));
118       enc28j60WriteOp(ENC28J60_BIT_FIELD_SET, ECON1, (address & BANK_MASK) >> 5);
119       Enc28j60Bank = (address & BANK_MASK);
120    }
121 }
122 
123 /*
124  * º¯ÊýÃû£ºenc28j60Read
125  * ÃèÊö  £º¶ÁÈ¡¿ØÖƼĴæÆ÷µÄÄÚÈÝ
126  * ÊäÈë  £º¿ØÖƼĴæÆ÷µÄµØÖ·
127  * Êä³ö  £ºÎÞ    
128  */
129 u8 enc28j60Read(u8 address)
130 {
131    // set the bank
132    enc28j60SetBank(address);
133    // do the read
134    return enc28j60ReadOp(ENC28J60_READ_CTRL_REG, address);
135 }
136 
137 
138 /*
139  * º¯ÊýÃû£ºenc28j60Write
140  * ÃèÊö  £ºÐ´ÈëÊý¾Ýµ½¿ØÖƼĴæÆ÷
141  * ÊäÈë  £º¿ØÖƼĴæÆ÷µÄµØÖ·£¬ÃüÁî
142  * Êä³ö  £ºÎÞ    
143  */
144 void enc28j60Write(u8 address, u8 data)
145 {
146    // set the bank
147    enc28j60SetBank(address);
148    // do the write
149    enc28j60WriteOp(ENC28J60_WRITE_CTRL_REG, address, data);
150 }
151 
152 /*
153  * º¯ÊýÃû£ºenc28j60PhyWrite
154  * ÃèÊö  £ºÏòphyдÈë¿ØÖƲÎÊý
155  * ÊäÈë  £º¼Ä´æÆ÷µÄµØÖ·£¬ÃüÁî
156  * Êä³ö  £ºÎÞ    
157  */
158 void enc28j60PhyWrite(u8 address, u16 data)
159 {
160    // set the PHY register address
161    enc28j60Write(MIREGADR, address);
162    // write the PHY data
163    enc28j60Write(MIWRL, data);
164    enc28j60Write(MIWRH, data >> 8);
165    // wait until the PHY write completes
166    while (enc28j60Read(MISTAT) & MISTAT_BUSY)
167    {
168       //Del_10us(1);
169       //_nop_();
170    }
171 }
172 
173 /*
174  * º¯ÊýÃû£ºenc28j60clkout
175  * ÃèÊö  £ºÉèÖÃÊä³öʱÖÓ
176  * ÊäÈë  £ºÊ±ÖÓ²ÎÊý
177  * Êä³ö  £ºÎÞ    
178  */
179 void enc28j60clkout(u8 clk)
180 {
181    //setup clkout: 2 is 12.5MHz:
182    enc28j60Write(ECOCON, clk & 0x7);
183 }
184 
185 /*
186  * º¯ÊýÃû£ºenc28j60Init
187  * ÃèÊö  £º³õʼ»¯ÒÔÌ«Íø¿ØÖÆÆ÷
188  * ÊäÈë  £ºÎÞ
189  * Êä³ö  £ºÎÞ    
190  */
191 void enc28j60Init(u8 * macaddr)
192 {
193  
194    ENC28J60_RSTH();
195    ENC28J60_CSH();
196    enc28j60WriteOp(ENC28J60_SOFT_RESET, 0, ENC28J60_SOFT_RESET);
197    // Del_1ms(250);
198    // check CLKRDY bit to see if reset is complete
199    // The CLKRDY does not work. See Rev. B4 Silicon Errata point. Just wait.
200    //while(!(enc28j60Read(ESTAT) & ESTAT_CLKRDY));
201    // do bank 0 stuff
202    // initialize receive buffer
203    // 16-bit transfers, must write low byte first
204    // set receive buffer start address
205    NextPacketPtr = RXSTART_INIT;
206    // Rx start
207    enc28j60Write(ERXSTL, RXSTART_INIT & 0xFF);
208    enc28j60Write(ERXSTH, RXSTART_INIT >> 8);
209    // set receive pointer address
210    enc28j60Write(ERXRDPTL, RXSTART_INIT & 0xFF);
211    enc28j60Write(ERXRDPTH, RXSTART_INIT >> 8);
212    // RX end
213    enc28j60Write(ERXNDL, RXSTOP_INIT & 0xFF);
214    enc28j60Write(ERXNDH, RXSTOP_INIT >> 8);
215    // TX start
216    enc28j60Write(ETXSTL, TXSTART_INIT & 0xFF);
217    enc28j60Write(ETXSTH, TXSTART_INIT >> 8);
218    // TX end
219    enc28j60Write(ETXNDL, TXSTOP_INIT & 0xFF);
220    enc28j60Write(ETXNDH, TXSTOP_INIT >> 8);
221    // do bank 1 stuff, packet filter:
222    // For broadcast packets we allow only ARP packtets
223    // All other packets should be unicast only for our mac (MAADR)
224    //
225    // The pattern to match on is therefore
226    // Type     ETH.DST
227    // ARP      BROADCAST
228    // 06 08 -- ff ff ff ff ff ff -> ip checksum for theses bytes=f7f9
229    // in binary these poitions are:11 0000 0011 1111
230    // This is hex 303F->EPMM0=0x3f,EPMM1=0x30
231    enc28j60Write(ERXFCON, ERXFCON_UCEN | ERXFCON_CRCEN | ERXFCON_PMEN);
232    enc28j60Write(EPMM0, 0x3f);
233    enc28j60Write(EPMM1, 0x30);
234    enc28j60Write(EPMCSL, 0xf9);
235    enc28j60Write(EPMCSH, 0xf7);
236    //
237    //
238    // do bank 2 stuff
239    // enable MAC receive
240    enc28j60Write(MACON1, MACON1_MARXEN | MACON1_TXPAUS | MACON1_RXPAUS);
241    // bring MAC out of reset
242    enc28j60Write(MACON2, 0x00);
243    // enable automatic padding to 60bytes and CRC operations
244    enc28j60WriteOp(ENC28J60_BIT_FIELD_SET, MACON3, MACON3_PADCFG0 | MACON3_TXCRCEN | MACON3_FRMLNEN | MACON3_FULDPX );//MACON3_HFRMLEN
245    // set inter-frame gap (non-back-to-back)
246    enc28j60Write(MAIPGL, 0x12);
247    enc28j60Write(MAIPGH, 0x0C);
248    // set inter-frame gap (back-to-back)
249    enc28j60Write(MABBIPG, 0x12);
250    // Set the maximum packet size which the controller will accept
251    // Do not send packets longer than MAX_FRAMELEN:
252    enc28j60Write(MAMXFLL, MAX_FRAMELEN & 0xFF); 
253    enc28j60Write(MAMXFLH, MAX_FRAMELEN >> 8);
254    // do bank 3 stuff
255    // write MAC address
256    // NOTE: MAC address in ENC28J60 is byte-backward
257    enc28j60Write(MAADR5, macaddr[0]);  
258    enc28j60Write(MAADR4, macaddr[1]);
259    enc28j60Write(MAADR3, macaddr[2]);
260    enc28j60Write(MAADR2, macaddr[3]);
261    enc28j60Write(MAADR1, macaddr[4]);
262    enc28j60Write(MAADR0, macaddr[5]);
263 
264 
265 
266    enc28j60PhyWrite(PHCON1, PHCON1_PDPXMD);
267 
268 
269    // no loopback of transmitted frames
270    enc28j60PhyWrite(PHCON2, PHCON2_HDLDIS);
271    // switch to bank 0
272    enc28j60SetBank(ECON1);
273    // enable interrutps
274    enc28j60WriteOp(ENC28J60_BIT_FIELD_SET, EIE, EIE_INTIE | EIE_PKTIE);
275    // enable packet reception
276    enc28j60WriteOp(ENC28J60_BIT_FIELD_SET, ECON1, ECON1_RXEN);
277 }
278 
279 // read the revision of the chip:
280 
281 u8 enc28j60getrev(void)
282 {
283    return(enc28j60Read(EREVID));
284 }
285 
286 /*
287  * º¯ÊýÃû£ºenc28j60PacketSend
288  * ÃèÊö  £º·¢ËÍÒ»¸öÊý¾Ý°ü
289  * ÊäÈë  £ºÊý¾Ý°ü³¤¶È£¬Ö¸ÏòÊý¾Ý°üµÄÖ¸Õë
290  * Êä³ö  £ºÎÞ    
291  */
292 void enc28j60PacketSend(u16 len, u8* packet)
293 {
294    // Set the write pointer to start of transmit buffer area
295    enc28j60Write(EWRPTL, TXSTART_INIT & 0xFF);
296    enc28j60Write(EWRPTH, TXSTART_INIT >> 8);
297 
298    // Set the TXND pointer to correspond to the packet size given
299    enc28j60Write(ETXNDL, (TXSTART_INIT + len) & 0xFF);
300    enc28j60Write(ETXNDH, (TXSTART_INIT + len) >> 8);
301 
302    // write per-packet control byte (0x00 means use macon3 settings)
303    enc28j60WriteOp(ENC28J60_WRITE_BUF_MEM, 0, 0x00);
304 
305    // copy the packet into the transmit buffer
306    enc28j60WriteBuffer(len, packet);
307 
308    // send the contents of the transmit buffer onto the network
309    enc28j60WriteOp(ENC28J60_BIT_FIELD_SET, ECON1, ECON1_TXRTS);
310 
311    // Reset the transmit logic problem. See Rev. B4 Silicon Errata point 12.
312    if ((enc28j60Read(EIR) & EIR_TXERIF))
313    {
314       enc28j60WriteOp(ENC28J60_BIT_FIELD_CLR, ECON1, ECON1_TXRTS);
315    }
316 }
317 
318 /*-----------------------------------------------------------------
319  Gets a packet from the network receive buffer, if one is available.
320  The packet will by headed by an ethernet header.
321       maxlen  The maximum acceptable length of a retrieved packet.
322       packet  Pointer where packet data should be stored.
323  Returns: Packet length in bytes if a packet was retrieved, zero otherwise.
324 -------------------------------------------------------------------*/
325 u16 enc28j60PacketReceive(u16 maxlen, u8* packet)
326 {
327    u16 rxstat;
328    u16 len;
329 
330    // check if a packet has been received and buffered
331    //if( !(enc28j60Read(EIR) & EIR_PKTIF) ){
332    // The above does not work. See Rev. B4 Silicon Errata point 6.
333    if (enc28j60Read(EPKTCNT) == 0)
334    {
335       return(0);
336    }
337 
338    // Set the read pointer to the start of the received packet
339    enc28j60Write(ERDPTL, (NextPacketPtr));
340    enc28j60Write(ERDPTH, (NextPacketPtr) >> 8);
341 
342    // read the next packet pointer
343    NextPacketPtr  = enc28j60ReadOp(ENC28J60_READ_BUF_MEM, 0);
344    NextPacketPtr |= enc28j60ReadOp(ENC28J60_READ_BUF_MEM, 0) << 8;
345 
346    // read the packet length (see datasheet page 43)
347    len  = enc28j60ReadOp(ENC28J60_READ_BUF_MEM, 0);
348    len |= enc28j60ReadOp(ENC28J60_READ_BUF_MEM, 0) << 8;
349 
350    len -= 4; //remove the CRC count
351    // read the receive status (see datasheet page 43)
352    rxstat = enc28j60ReadOp(ENC28J60_READ_BUF_MEM, 0);
353    rxstat |= enc28j60ReadOp(ENC28J60_READ_BUF_MEM, 0) << 8;
354    // limit retrieve length
355    if (len > maxlen - 1)
356    {
357       len = maxlen - 1;
358    }
359 
360    // check CRC and symbol errors (see datasheet page 44, table 7-3):
361    // The ERXFCON.CRCEN is set by default. Normally we should not
362    // need to check this.
363    if ((rxstat & 0x80) == 0)
364    {
365       // invalid
366       len = 0;
367    }
368    else
369    {
370       // copy the packet from the receive buffer
371       enc28j60ReadBuffer(len, packet);
372    }
373    // Move the RX read pointer to the start of the next received packet
374    // This frees the memory we just read out
375    enc28j60Write(ERXRDPTL, (NextPacketPtr));
376    enc28j60Write(ERXRDPTH, (NextPacketPtr) >> 8);
377 
378    // decrement the packet counter indicate we are done with this packet
379    enc28j60WriteOp(ENC28J60_BIT_FIELD_SET, ECON2, ECON2_PKTDEC);
380    return(len);
381 }

enc28j60.c

  1 #include 
  2 
  3 #ifndef __ENC28J60_H
  4 #define __ENC28J60_H
  5 
  6 // ENC28J60 Control Registers
  7 // Control register definitions are a combination of address,
  8 // bank number, and Ethernet/MAC/PHY indicator bits.
  9 // - Register address        (bits 0-4)
 10 // - Bank number        (bits 5-6)
 11 // - MAC/PHY indicator        (bit 7)
 12 #define ADDR_MASK        0x1F
 13 #define BANK_MASK        0x60
 14 #define SPRD_MASK        0x80
 15 // All-bank registers
 16 #define EIE              0x1B
 17 #define EIR              0x1C
 18 #define ESTAT            0x1D
 19 #define ECON2            0x1E
 20 #define ECON1            0x1F
 21 // Bank 0 registers
 22 #define ERDPTL           (0x00|0x00)
 23 #define ERDPTH           (0x01|0x00)
 24 #define EWRPTL           (0x02|0x00)
 25 #define EWRPTH           (0x03|0x00)
 26 #define ETXSTL           (0x04|0x00)
 27 #define ETXSTH           (0x05|0x00)
 28 #define ETXNDL           (0x06|0x00)
 29 #define ETXNDH           (0x07|0x00)
 30 #define ERXSTL           (0x08|0x00)
 31 #define ERXSTH           (0x09|0x00)
 32 #define ERXNDL           (0x0A|0x00)
 33 #define ERXNDH           (0x0B|0x00)
 34 #define ERXRDPTL         (0x0C|0x00)
 35 #define ERXRDPTH         (0x0D|0x00)
 36 #define ERXWRPTL         (0x0E|0x00)
 37 #define ERXWRPTH         (0x0F|0x00)
 38 #define EDMASTL          (0x10|0x00)
 39 #define EDMASTH          (0x11|0x00)
 40 #define EDMANDL          (0x12|0x00)
 41 #define EDMANDH          (0x13|0x00)
 42 #define EDMADSTL         (0x14|0x00)
 43 #define EDMADSTH         (0x15|0x00)
 44 #define EDMACSL          (0x16|0x00)
 45 #define EDMACSH          (0x17|0x00)
 46 // Bank 1 registers
 47 #define EHT0             (0x00|0x20)
 48 #define EHT1             (0x01|0x20)
 49 #define EHT2             (0x02|0x20)
 50 #define EHT3             (0x03|0x20)
 51 #define EHT4             (0x04|0x20)
 52 #define EHT5             (0x05|0x20)
 53 #define EHT6             (0x06|0x20)
 54 #define EHT7             (0x07|0x20)
 55 #define EPMM0            (0x08|0x20)
 56 #define EPMM1            (0x09|0x20)
 57 #define EPMM2            (0x0A|0x20)
 58 #define EPMM3            (0x0B|0x20)
 59 #define EPMM4            (0x0C|0x20)
 60 #define EPMM5            (0x0D|0x20)
 61 #define EPMM6            (0x0E|0x20)
 62 #define EPMM7            (0x0F|0x20)
 63 #define EPMCSL           (0x10|0x20)
 64 #define EPMCSH           (0x11|0x20)
 65 #define EPMOL            (0x14|0x20)
 66 #define EPMOH            (0x15|0x20)
 67 #define EWOLIE           (0x16|0x20)
 68 #define EWOLIR           (0x17|0x20)
 69 #define ERXFCON          (0x18|0x20)
 70 #define EPKTCNT          (0x19|0x20)
 71 // Bank 2 registers
 72 #define MACON1           (0x00|0x40|0x80)
 73 #define MACON2           (0x01|0x40|0x80)
 74 #define MACON3           (0x02|0x40|0x80)
 75 #define MACON4           (0x03|0x40|0x80)
 76 #define MABBIPG          (0x04|0x40|0x80)
 77 #define MAIPGL           (0x06|0x40|0x80)
 78 #define MAIPGH           (0x07|0x40|0x80)
 79 #define MACLCON1         (0x08|0x40|0x80)
 80 #define MACLCON2         (0x09|0x40|0x80)
 81 #define MAMXFLL          (0x0A|0x40|0x80)
 82 #define MAMXFLH          (0x0B|0x40|0x80)
 83 #define MAPHSUP          (0x0D|0x40|0x80)
 84 #define MICON            (0x11|0x40|0x80)
 85 #define MICMD            (0x12|0x40|0x80)
 86 #define MIREGADR         (0x14|0x40|0x80)
 87 #define MIWRL            (0x16|0x40|0x80)
 88 #define MIWRH            (0x17|0x40|0x80)
 89 #define MIRDL            (0x18|0x40|0x80)
 90 #define MIRDH            (0x19|0x40|0x80)
 91 // Bank 3 registers
 92 #define MAADR1           (0x00|0x60|0x80)
 93 #define MAADR0           (0x01|0x60|0x80)
 94 #define MAADR3           (0x02|0x60|0x80)
 95 #define MAADR2           (0x03|0x60|0x80)
 96 #define MAADR5           (0x04|0x60|0x80)
 97 #define MAADR4           (0x05|0x60|0x80)
 98 #define EBSTSD           (0x06|0x60)
 99 #define EBSTCON          (0x07|0x60)
100 #define EBSTCSL          (0x08|0x60)
101 #define EBSTCSH          (0x09|0x60)
102 #define MISTAT           (0x0A|0x60|0x80)
103 #define EREVID           (0x12|0x60)
104 #define ECOCON           (0x15|0x60)
105 #define EFLOCON          (0x17|0x60)
106 #define EPAUSL           (0x18|0x60)
107 #define EPAUSH           (0x19|0x60)
108 // PHY registers
109 #define PHCON1           0x00
110 #define PHSTAT1          0x01
111 #define PHHID1           0x02
112 #define PHHID2           0x03
113 #define PHCON2           0x10
114 #define PHSTAT2          0x11
115 #define PHIE             0x12
116 #define PHIR             0x13
117 #define PHLCON           0x14
118 
119 // ENC28J60 ERXFCON Register Bit Definitions
120 #define ERXFCON_UCEN     0x80
121 #define ERXFCON_ANDOR    0x40
122 #define ERXFCON_CRCEN    0x20
123 #define ERXFCON_PMEN     0x10
124 #define ERXFCON_MPEN     0x08
125 #define ERXFCON_HTEN     0x04
126 #define ERXFCON_MCEN     0x02
127 #define ERXFCON_BCEN     0x01
128 // ENC28J60 EIE Register Bit Definitions
129 #define EIE_INTIE        0x80
130 #define EIE_PKTIE        0x40
131 #define EIE_DMAIE        0x20
132 #define EIE_LINKIE       0x10
133 #define EIE_TXIE         0x08
134 #define EIE_WOLIE        0x04
135 #define EIE_TXERIE       0x02
136 #define EIE_RXERIE       0x01
137 // ENC28J60 EIR Register Bit Definitions
138 #define EIR_PKTIF        0x40
139 #define EIR_DMAIF        0x20
140 #define EIR_LINKIF       0x10
141 #define EIR_TXIF         0x08
142 #define EIR_WOLIF        0x04
143 #define EIR_TXERIF       0x02
144 #define EIR_RXERIF       0x01
145 // ENC28J60 ESTAT Register Bit Definitions
146 #define ESTAT_INT        0x80
147 #define ESTAT_LATECOL    0x10
148 #define ESTAT_RXBUSY     0x04
149 #define ESTAT_TXABRT     0x02
150 #define ESTAT_CLKRDY     0x01
151 // ENC28J60 ECON2 Register Bit Definitions
152 #define ECON2_AUTOINC    0x80
153 #define ECON2_PKTDEC     0x40
154 #define ECON2_PWRSV      0x20
155 #define ECON2_VRPS       0x08
156 // ENC28J60 ECON1 Register Bit Definitions
157 #define ECON1_TXRST      0x80
158 #define ECON1_RXRST      0x40
159 #define ECON1_DMAST      0x20
160 #define ECON1_CSUMEN     0x10
161 #define ECON1_TXRTS      0x08
162 #define ECON1_RXEN       0x04
163 #define ECON1_BSEL1      0x02
164 #define ECON1_BSEL0      0x01
165 // ENC28J60 MACON1 Register Bit Definitions
166 #define MACON1_LOOPBK    0x10
167 #define MACON1_TXPAUS    0x08
168 #define MACON1_RXPAUS    0x04
169 #define MACON1_PASSALL   0x02
170 #define MACON1_MARXEN    0x01
171 // ENC28J60 MACON2 Register Bit Definitions
172 #define MACON2_MARST     0x80
173 #define MACON2_RNDRST    0x40
174 #define MACON2_MARXRST   0x08
175 #define MACON2_RFUNRST   0x04
176 #define MACON2_MATXRST   0x02
177 #define MACON2_TFUNRST   0x01
178 // ENC28J60 MACON3 Register Bit Definitions
179 #define MACON3_PADCFG2   0x80
180 #define MACON3_PADCFG1   0x40
181 #define MACON3_PADCFG0   0x20
182 #define MACON3_TXCRCEN   0x10
183 #define MACON3_PHDRLEN   0x08
184 #define MACON3_HFRMLEN   0x04
185 #define MACON3_FRMLNEN   0x02
186 #define MACON3_FULDPX    0x01
187 // ENC28J60 MICMD Register Bit Definitions
188 #define MICMD_MIISCAN    0x02
189 #define MICMD_MIIRD      0x01
190 // ENC28J60 MISTAT Register Bit Definitions
191 #define MISTAT_NVALID    0x04
192 #define MISTAT_SCAN      0x02
193 #define MISTAT_BUSY      0x01
194 // ENC28J60 PHY PHCON1 Register Bit Definitions
195 #define PHCON1_PRST      0x8000
196 #define PHCON1_PLOOPBK   0x4000
197 #define PHCON1_PPWRSV    0x0800
198 #define PHCON1_PDPXMD    0x0100
199 // ENC28J60 PHY PHSTAT1 Register Bit Definitions
200 #define PHSTAT1_PFDPX    0x1000
201 #define PHSTAT1_PHDPX    0x0800
202 #define PHSTAT1_LLSTAT   0x0004
203 #define PHSTAT1_JBSTAT   0x0002
204 // ENC28J60 PHY PHCON2 Register Bit Definitions
205 #define PHCON2_FRCLINK   0x4000
206 #define PHCON2_TXDIS     0x2000
207 #define PHCON2_JABBER    0x0400
208 #define PHCON2_HDLDIS    0x0100
209 
210 // ENC28J60 Packet Control Byte Bit Definitions
211 #define PKTCTRL_PHUGEEN  0x08
212 #define PKTCTRL_PPADEN   0x04
213 #define PKTCTRL_PCRCEN   0x02
214 #define PKTCTRL_POVERRIDE 0x01
215 
216 // SPI operation codes
217 #define ENC28J60_READ_CTRL_REG       0x00
218 #define ENC28J60_READ_BUF_MEM        0x3A
219 #define ENC28J60_WRITE_CTRL_REG      0x40
220 #define ENC28J60_WRITE_BUF_MEM       0x7A
221 #define ENC28J60_BIT_FIELD_SET       0x80
222 #define ENC28J60_BIT_FIELD_CLR       0xA0
223 #define ENC28J60_SOFT_RESET          0xFF
224 
225 // The RXSTART_INIT should be zero. See Rev. B4 Silicon Errata
226 // buffer boundaries applied to internal 8K ram
227 // the entire available packet buffer space is allocated
228 //
229 // start with recbuf at 0/
230 #define RXSTART_INIT     0x0
231 // receive buffer end
232 #define RXSTOP_INIT      (0x1FFF-0x0600-1)
233 // start TX buffer at 0x1FFF-0x0600, pace for one full ethernet frame (~1500 bytes)
234 #define TXSTART_INIT     (0x1FFF-0x0600)
235 // stp TX buffer at end of mem
236 #define TXSTOP_INIT      0x1FFF
237 //
238 // max frame length which the conroller will accept:
239 #define        MAX_FRAMELEN        1500        // (note: maximum ethernet frame length would be 1518)
240 //#define MAX_FRAMELEN     600
241 
242 
243 
244 
245 
246 
247 
248 
249 u8 enc28j60ReadOp(u8 op, u8 address);
250 void     enc28j60WriteOp(u8 op, u8 address, u8 data);
251 void enc28j60ReadBuffer(u16 len, u8* data);
252 void enc28j60WriteBuffer(u16 len, u8* data);
253 void enc28j60SetBank(u8 address);
254 u8 enc28j60Read(u8 address);
255 void enc28j60Write(u8 address, u8 data);
256 void enc28j60PhyWrite(u8 address, u16 data);
257 void enc28j60clkout(u8 clk);
258 void enc28j60Init(u8* macaddr);
259 u8 enc28j60getrev(void);
260 void enc28j60PacketSend(u16 len, u8* packet);
261 u16 enc28j60PacketReceive(u16 maxlen, u8* packet);
262 
263 
264 #endif

enc28j60.h

8.enc28j60使用SPI接口，需根据实际端口修改，以下仅供参考：

 1 #include "SPI.h"
 2 
 3 
 4 void SPI2_Init(void)
 5 {
 6    SPI_InitTypeDef SPI_InitStructure;
 7    GPIO_InitTypeDef GPIO_InitStructure;
 8 
 9    /* Enable SPI2 and GPIOB clocks */
10    RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOB, ENABLE);
11      RCC_APB1PeriphClockCmd(RCC_APB1Periph_SPI2, ENABLE);
12    
13    GPIO_InitStructure.GPIO_Pin = GPIO_Pin_12;
14    GPIO_InitStructure.GPIO_Speed = GPIO_Speed_10MHz;
15    GPIO_InitStructure.GPIO_Mode = GPIO_Mode_Out_PP;       // 
16    GPIO_Init(GPIOB, &GPIO_InitStructure); 
17 
18    /* Configure SPI2 pins: NSS, SCK, MISO and MOSI */
19      GPIO_InitStructure.GPIO_Pin = GPIO_Pin_13 | GPIO_Pin_14 | GPIO_Pin_15;
20      GPIO_InitStructure.GPIO_Speed = GPIO_Speed_10MHz;
21      GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_PP;          
22      GPIO_Init(GPIOB, &GPIO_InitStructure);
23   
24    /* PC6:ENC28J60_INT */                        // 
25 
26    /* PC7:ENC28J60_RST*/                    // ¸
27 
28    /* SPI2 configuration */ 
29    SPI_InitStructure.SPI_Direction = SPI_Direction_2Lines_FullDuplex;
30    SPI_InitStructure.SPI_Mode = SPI_Mode_Master;
31    SPI_InitStructure.SPI_DataSize = SPI_DataSize_8b;
32    SPI_InitStructure.SPI_CPOL = SPI_CPOL_Low;
33    SPI_InitStructure.SPI_CPHA = SPI_CPHA_1Edge;
34    SPI_InitStructure.SPI_NSS = SPI_NSS_Soft;
35    SPI_InitStructure.SPI_BaudRatePrescaler = SPI_BaudRatePrescaler_4;
36    SPI_InitStructure.SPI_FirstBit = SPI_FirstBit_MSB;
37    SPI_InitStructure.SPI_CRCPolynomial = 7;
38    SPI_Init(SPI2, &SPI_InitStructure);
39 
40    /* Enable SPI2  */
41    SPI_Cmd(SPI2, ENABLE);
42 }
43 
44 
45 uint8_t SPI2_ReadWrite(uint8_t dat)
46 {
47    /* Loop while DR register in not emplty */
48    while (SPI_I2S_GetFlagStatus(SPI2, SPI_I2S_FLAG_TXE) == RESET);
49 
50    /* Send byte through the SPI2 peripheral */
51    SPI_I2S_SendData(SPI2, dat);
52 
53    /* Wait to receive a byte */
54    while (SPI_I2S_GetFlagStatus(SPI2, SPI_I2S_FLAG_RXNE) == RESET);
55 
56    /* Return the byte read from the SPI bus */
57    return SPI_I2S_ReceiveData(SPI2);
58 }

SPI.c

 1 #ifndef __SPI_H
 2 #define __SPI_H
 3 
 4 #include 
 5 
 6 #define  ENC28J60_CSL()    (GPIOB->ODR &= ~(1<<12))
 7 #define  ENC28J60_CSH()    (GPIOB->ODR |= 1<<12)
 8 
 9 
10 #define  ENC_SPI_ReadWrite  SPI2_ReadWrite
11 #define  ENC_SPI_Init   SPI2_Init
12 
13 void SPI2_Init(void);
14 uint8_t SPI2_ReadWrite(uint8_t writedat);
15    
16 
17 #endif

SPI.h

　　— —随笔，备忘！

转载于:https://www.cnblogs.com/qiufengmuye/p/7887291.html