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lwip_tcpecho_sa.c
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1 /*
2 * @brief LWIP no-RTOS TCP Echo example
3 *
4 * @note
5 * Copyright(C) NXP Semiconductors, 2012
6 * All rights reserved.
7 *
8 * @par
9 * Software that is described herein is for illustrative purposes only
10 * which provides customers with programming information regarding the
11 * LPC products. This software is supplied "AS IS" without any warranties of
12 * any kind, and NXP Semiconductors and its licensor disclaim any and
13 * all warranties, express or implied, including all implied warranties of
14 * merchantability, fitness for a particular purpose and non-infringement of
15 * intellectual property rights. NXP Semiconductors assumes no responsibility
16 * or liability for the use of the software, conveys no license or rights under any
17 * patent, copyright, mask work right, or any other intellectual property rights in
18 * or to any products. NXP Semiconductors reserves the right to make changes
19 * in the software without notification. NXP Semiconductors also makes no
20 * representation or warranty that such application will be suitable for the
21 * specified use without further testing or modification.
22 *
23 * @par
24 * Permission to use, copy, modify, and distribute this software and its
25 * documentation is hereby granted, under NXP Semiconductors' and its
26 * licensor's relevant copyrights in the software, without fee, provided that it
27 * is used in conjunction with NXP Semiconductors microcontrollers. This
28 * copyright, permission, and disclaimer notice must appear in all copies of
29 * this code.
30 */
31
32 #include "lwip/init.h"
33 #include "lwip/opt.h"
34 #include "lwip/sys.h"
35 #include "lwip/memp.h"
36 #include "lwip/tcpip.h"
37 #include "lwip/ip_addr.h"
38 #include "lwip/netif.h"
39 #include "lwip/timers.h"
40 #include "netif/etharp.h"
41
42 #if LWIP_DHCP
43 #include "lwip/dhcp.h"
44 #endif
45
46 #include "board.h"
47 #include "lpc_phy.h"
48 #include "arch\lpc18xx_43xx_emac.h"
49 #include "arch\lpc_arch.h"
50 #include "echo.h"
51
89 /*****************************************************************************
90 * Private types/enumerations/variables
91 ****************************************************************************/
92
93 /* NETIF data */
94 static struct netif lpc_netif;
95
96 /*****************************************************************************
97 * Public types/enumerations/variables
98 ****************************************************************************/
99
100 /*****************************************************************************
101 * Private functions
102 ****************************************************************************/
103
104 /* Sets up system hardware */
105 static void prvSetupHardware(void)
106 {
107 /* LED0 is used for the link status, on = PHY cable detected */
108 Board_Init();
109
110 /* Initial LED state is off to show an unconnected cable state */
111 Board_LED_Set(0, false);
112
113 /* Setup a 1mS sysTick for the primary time base */
114 SysTick_Enable(1);
115 }
116
117 /*****************************************************************************
118 * Public functions
119 ****************************************************************************/
120
125 int main(void)
126 {
127 uint32_t physts;
128 ip_addr_t ipaddr, netmask, gw;
129
130 prvSetupHardware();
131
132 /* Initialize LWIP */
133 lwip_init();
134
135 LWIP_DEBUGF(LWIP_DBG_ON, ("Starting LWIP TCP echo server...\n"));
136
137 /* Static IP assignment */
138 #if LWIP_DHCP
139 IP4_ADDR(&gw, 0, 0, 0, 0);
140 IP4_ADDR(&ipaddr, 0, 0, 0, 0);
141 IP4_ADDR(&netmask, 0, 0, 0, 0);
142 #else
143 IP4_ADDR(&gw, 10, 1, 10, 1);
144 IP4_ADDR(&ipaddr, 10, 1, 10, 234);
145 IP4_ADDR(&netmask, 255, 255, 255, 0);
146 APP_PRINT_IP(&ipaddr);
147 #endif
148
149 /* Add netif interface for lpc17xx_8x */
150 netif_add(&lpc_netif, &ipaddr, &netmask, &gw, NULL, lpc_enetif_init,
151 ethernet_input);
152 netif_set_default(&lpc_netif);
153 netif_set_up(&lpc_netif);
154
155 #if LWIP_DHCP
156 dhcp_start(&lpc_netif);
157 #endif
158
159 /* Initialize and start application */
160 echo_init();
161
162 /* This could be done in the sysTick ISR, but may stay in IRQ context
163 too long, so do this stuff with a background loop. */
164 while (1) {
165 /* Handle packets as part of this loop, not in the IRQ handler */
166 lpc_enetif_input(&lpc_netif);
167
168 /* lpc_rx_queue will re-qeueu receive buffers. This normally occurs
169 automatically, but in systems were memory is constrained, pbufs
170 may not always be able to get allocated, so this function can be
171 optionally enabled to re-queue receive buffers. */
172 #if 0
173 while (lpc_rx_queue(&lpc_netif)) {}
174 #endif
175
176 /* Free TX buffers that are done sending */
177 lpc_tx_reclaim(&lpc_netif);
178
179 /* LWIP timers - ARP, DHCP, TCP, etc. */
180 sys_check_timeouts();
181
182 /* Call the PHY status update state machine once in a while
183 to keep the link status up-to-date */
184 physts = lpcPHYStsPoll();
185
186 /* Only check for connection state when the PHY status has changed */
187 if (physts & PHY_LINK_CHANGED) {
188 if (physts & PHY_LINK_CONNECTED) {
189 Board_LED_Set(0, true);
190
191 /* Set interface speed and duplex */
192 if (physts & PHY_LINK_SPEED100) {
193 Chip_ENET_SetSpeed(LPC_ETHERNET, 1);
194 NETIF_INIT_SNMP(&lpc_netif, snmp_ifType_ethernet_csmacd, 100000000);
195 }
196 else {
197 Chip_ENET_SetSpeed(LPC_ETHERNET, 0);
198 NETIF_INIT_SNMP(&lpc_netif, snmp_ifType_ethernet_csmacd, 10000000);
199 }
200 if (physts & PHY_LINK_FULLDUPLX) {
201 Chip_ENET_SetDuplex(LPC_ETHERNET, true);
202 }
203 else {
204 Chip_ENET_SetDuplex(LPC_ETHERNET, false);
205 }
206
207 netif_set_link_up(&lpc_netif);
208 }
209 else {
210 Board_LED_Set(0, false);
211 netif_set_link_down(&lpc_netif);
212 }
213
214 DEBUGOUT("Link connect status: %d\r\n", ((physts & PHY_LINK_CONNECTED) != 0));
215 }
216 }
217
218 /* Never returns, for warning only */
219 return 0;
220 }
221