begriffs open source - cmsis-freertos/blob - Demo/CORTEX_A2F200_SoftConsole/uIP

1 /*

4

5 VISIT http://www.FreeRTOS.org TO ENSURE YOU ARE USING THE LATEST VERSION.

6

7 This file is part of the FreeRTOS distribution.

8

9 FreeRTOS is free software; you can redistribute it and/or modify it under

10 the terms of the GNU General Public License (version 2) as published by the

11 Free Software Foundation >>>> AND MODIFIED BY <<<< the FreeRTOS exception.

12

13 ***************************************************************************

14 >>! NOTE: The modification to the GPL is included to allow you to !<<

15 >>! distribute a combined work that includes FreeRTOS without being !<<

16 >>! obliged to provide the source code for proprietary components !<<

17 >>! outside of the FreeRTOS kernel. !<<

18 ***************************************************************************

19

20 FreeRTOS is distributed in the hope that it will be useful, but WITHOUT ANY

21 WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS

22 FOR A PARTICULAR PURPOSE. Full license text is available on the following

23 link: http://www.freertos.org/a00114.html

24

25 ***************************************************************************

26 * *

27 * FreeRTOS provides completely free yet professionally developed, *

28 * robust, strictly quality controlled, supported, and cross *

29 * platform software that is more than just the market leader, it *

30 * is the industry's de facto standard. *

31 * *

32 * Help yourself get started quickly while simultaneously helping *

33 * to support the FreeRTOS project by purchasing a FreeRTOS *

34 * tutorial book, reference manual, or both: *

35 * http://www.FreeRTOS.org/Documentation *

36 * *

37 ***************************************************************************

38

39 http://www.FreeRTOS.org/FAQHelp.html - Having a problem? Start by reading

40 the FAQ page "My application does not run, what could be wrong?". Have you

41 defined configASSERT()?

42

43 http://www.FreeRTOS.org/support - In return for receiving this top quality

44 embedded software for free we request you assist our global community by

45 participating in the support forum.

46

47 http://www.FreeRTOS.org/training - Investing in training allows your team to

48 be as productive as possible as early as possible. Now you can receive

49 FreeRTOS training directly from Richard Barry, CEO of Real Time Engineers

50 Ltd, and the world's leading authority on the world's leading RTOS.

51

52 http://www.FreeRTOS.org/plus - A selection of FreeRTOS ecosystem products,

53 including FreeRTOS+Trace - an indispensable productivity tool, a DOS

54 compatible FAT file system, and our tiny thread aware UDP/IP stack.

55

56 http://www.FreeRTOS.org/labs - Where new FreeRTOS products go to incubate.

57 Come and try FreeRTOS+TCP, our new open source TCP/IP stack for FreeRTOS.

58

59 http://www.OpenRTOS.com - Real Time Engineers ltd. license FreeRTOS to High

60 Integrity Systems ltd. to sell under the OpenRTOS brand. Low cost OpenRTOS

61 licenses offer ticketed support, indemnification and commercial middleware.

62

63 http://www.SafeRTOS.com - High Integrity Systems also provide a safety

64 engineered and independently SIL3 certified version for use in safety and

65 mission critical applications that require provable dependability.

66

67 1 tab == 4 spaces!

68 */

69

70 /* Standard includes. */

71 #include <string.h>

72

73 /* Scheduler includes. */

74 #include "FreeRTOS.h"

75 #include "task.h"

76 #include "queue.h"

77 #include "timers.h"

78

79 /* uip includes. */

80 #include "net/uip.h"

81 #include "net/uip_arp.h"

82 #include "apps/httpd/httpd.h"

83 #include "sys/timer.h"

84 #include "net/clock-arch.h"

85

86 /* Demo includes. */

87 #include "ParTest.h"

88

89 /* Hardware driver includes. */

90 #include "mss_ethernet_mac_regs.h"

91 #include "mss_ethernet_mac.h"

92

93 /* The buffer used by the uIP stack to both receive and send. In this case,

94 because the Ethernet driver has been modified to be zero copy - the uip_buf

95 variable is just a pointer to an Ethernet buffer, and not a buffer in its own

96 right. */

97 extern unsigned char *uip_buf;

98

99 /* The ARP timer and the periodic timer share a callback function, so the

100 respective timer IDs are used to determine which timer actually expired. These

101 constants are assigned to the timer IDs. */

102 #define uipARP_TIMER 0

103 #define uipPERIODIC_TIMER 1

104

105 /* The length of the queue used to send events from timers or the Ethernet

106 driver to the uIP stack. */

107 #define uipEVENT_QUEUE_LENGTH 10

108

109 /* A block time of zero simply means "don't block". */

110 #define uipDONT_BLOCK 0UL

111

112 /* How long to wait before attempting to connect the MAC again. */

113 #define uipINIT_WAIT ( 100 / portTICK_PERIOD_MS )

114

115 /* Shortcut to the header within the Rx buffer. */

116 #define xHeader ((struct uip_eth_hdr *) &uip_buf[ 0 ])

117

118 /* Standard constant. */

119 #define uipTOTAL_FRAME_HEADER_SIZE 54

120

121 /*-----------------------------------------------------------*/

122

123 /*

124 * Setup the MAC address in the MAC itself, and in the uIP stack.

125 */

126 static void prvSetMACAddress( void );

127

128 /*

129 * Perform any uIP initialisation required to ready the stack for http

130 * processing.

131 */

132 static void prvInitialise_uIP( void );

133

134 /*

135 * Handles Ethernet interrupt events.

136 */

137 static void prvEMACEventListener( unsigned long ulISREvents );

138

139 /*

140 * The callback function that is assigned to both the periodic timer and the

141 * ARP timer.

142 */

143 static void prvUIPTimerCallback( TimerHandle_t xTimer );

144

145 /*

146 * Initialise the MAC hardware.

147 */

148 static void prvInitEmac( void );

149

150 /*

151 * Write data to the Ethener. Note that this actually writes data twice for the

152 * to get around delayed ack issues when communicating with a non real-time

153 * peer (for example, a Windows machine).

154 */

155 void vEMACWrite( void );

156

157 /*

158 * Port functions required by the uIP stack.

159 */

160 clock_time_t clock_time( void );

161

162 /*-----------------------------------------------------------*/

163

164 /* The queue used to send TCP/IP events to the uIP stack. */

165 QueueHandle_t xEMACEventQueue = NULL;

166

167 /*-----------------------------------------------------------*/

168

169 clock_time_t clock_time( void )

170 {

171 return xTaskGetTickCount();

172 }

173 /*-----------------------------------------------------------*/

174

175 void vuIP_Task( void *pvParameters )

176 {

177 portBASE_TYPE i;

178 unsigned long ulNewEvent = 0UL, ulUIP_Events = 0UL;

179 long lPacketLength;

180

181 /* Just to prevent compiler warnings about the unused parameter. */

182 ( void ) pvParameters;

183

184 /* Initialise the uIP stack, configuring for web server usage. */

185 prvInitialise_uIP();

186

187 /* Initialise the MAC and PHY. */

188 prvInitEmac();

189

190 for( ;; )

191 {

192 /* Is there received data ready to be processed? */

193 lPacketLength = MSS_MAC_rx_packet();

194

195 /* Statements to be executed if data has been received on the Ethernet. */

196 if( ( lPacketLength > 0 ) && ( uip_buf != NULL ) )

197 {

198 uip_len = ( u16_t ) lPacketLength;

199

200 /* Standard uIP loop taken from the uIP manual. */

201 if( xHeader->type == htons( UIP_ETHTYPE_IP ) )

202 {

203 uip_arp_ipin();

204 uip_input();

205

206 /* If the above function invocation resulted in data that

207 should be sent out on the network, the global variable

208 uip_len is set to a value > 0. */

209 if( uip_len > 0 )

210 {

211 uip_arp_out();

212 vEMACWrite();

213 }

214 }

215 else if( xHeader->type == htons( UIP_ETHTYPE_ARP ) )

216 {

217 uip_arp_arpin();

218

219 /* If the above function invocation resulted in data that

220 should be sent out on the network, the global variable

221 uip_len is set to a value > 0. */

222 if( uip_len > 0 )

223 {

224 vEMACWrite();

225 }

226 }

227 }

228 else

229 {

230 /* Clear the RX event latched in ulUIP_Events - if one was latched. */

231 ulUIP_Events &= ~uipETHERNET_RX_EVENT;

232 }

233

234 /* Statements to be executed if the TCP/IP period timer has expired. */

235 if( ( ulUIP_Events & uipPERIODIC_TIMER_EVENT ) != 0UL )

236 {

237 ulUIP_Events &= ~uipPERIODIC_TIMER_EVENT;

238

239 if( uip_buf != NULL )

240 {

241 for( i = 0; i < UIP_CONNS; i++ )

242 {

243 uip_periodic( i );

244

245 /* If the above function invocation resulted in data that

246 should be sent out on the network, the global variable

247 uip_len is set to a value > 0. */

248 if( uip_len > 0 )

249 {

250 uip_arp_out();

251 vEMACWrite();

252 }

253 }

254 }

255 }

256

257 /* Statements to be executed if the ARP timer has expired. */

258 if( ( ulUIP_Events & uipARP_TIMER_EVENT ) != 0 )

259 {

260 ulUIP_Events &= ~uipARP_TIMER_EVENT;

261 uip_arp_timer();

262 }

263

264 /* If all latched events have been cleared - block until another event

265 occurs. */

266 if( ulUIP_Events == pdFALSE )

267 {

268 xQueueReceive( xEMACEventQueue, &ulNewEvent, portMAX_DELAY );

269 ulUIP_Events |= ulNewEvent;

270 }

271 }

272 }

273 /*-----------------------------------------------------------*/

274

275 static void prvSetMACAddress( void )

276 {

277 struct uip_eth_addr xAddr;

278

279 /* Configure the MAC address in the uIP stack. */

280 xAddr.addr[ 0 ] = configMAC_ADDR0;

281 xAddr.addr[ 1 ] = configMAC_ADDR1;

282 xAddr.addr[ 2 ] = configMAC_ADDR2;

283 xAddr.addr[ 3 ] = configMAC_ADDR3;

284 xAddr.addr[ 4 ] = configMAC_ADDR4;

285 xAddr.addr[ 5 ] = configMAC_ADDR5;

286 uip_setethaddr( xAddr );

287 }

288 /*-----------------------------------------------------------*/

289

290 static void prvInitialise_uIP( void )

291 {

292 uip_ipaddr_t xIPAddr;

293 TimerHandle_t xARPTimer, xPeriodicTimer;

294

295 uip_init();

296 uip_ipaddr( &xIPAddr, configIP_ADDR0, configIP_ADDR1, configIP_ADDR2, configIP_ADDR3 );

297 uip_sethostaddr( &xIPAddr );

298 uip_ipaddr( &xIPAddr, configNET_MASK0, configNET_MASK1, configNET_MASK2, configNET_MASK3 );

299 uip_setnetmask( &xIPAddr );

300 prvSetMACAddress();

301 httpd_init();

302

303 /* Create the queue used to sent TCP/IP events to the uIP stack. */

304 xEMACEventQueue = xQueueCreate( uipEVENT_QUEUE_LENGTH, sizeof( unsigned long ) );

305

306 /* Create and start the uIP timers. */

307 xARPTimer = xTimerCreate( "ARPTimer", /* Just a name that is helpful for debugging, not used by the kernel. */

308 ( 10000UL / portTICK_PERIOD_MS ), /* Timer period. */

309 pdTRUE, /* Autor-reload. */

310 ( void * ) uipARP_TIMER,

311 prvUIPTimerCallback

312 );

313

314 xPeriodicTimer = xTimerCreate( "PeriodicTimer",

315 ( 500UL / portTICK_PERIOD_MS ),

316 pdTRUE, /* Autor-reload. */

317 ( void * ) uipPERIODIC_TIMER,

318 prvUIPTimerCallback

319 );

320

321 /* Sanity check that the timers were indeed created. */

322 configASSERT( xARPTimer );

323 configASSERT( xPeriodicTimer );

324

325 /* These commands will block indefinitely until they succeed, so there is

326 no point in checking their return values. */

327 xTimerStart( xARPTimer, portMAX_DELAY );

328 xTimerStart( xPeriodicTimer, portMAX_DELAY );

329 }

330 /*-----------------------------------------------------------*/

331

332 static void prvEMACEventListener( unsigned long ulISREvents )

333 {

334 long lHigherPriorityTaskWoken = pdFALSE;

335 const unsigned long ulRxEvent = uipETHERNET_RX_EVENT;

336

337 /* Sanity check that the event queue was indeed created. */

338 configASSERT( xEMACEventQueue );

339

340 if( ( ulISREvents & MSS_MAC_EVENT_PACKET_SEND ) != 0UL )

341 {

342 /* An Ethernet Tx event has occurred. */

343 MSS_MAC_FreeTxBuffers();

344 }

345

346 if( ( ulISREvents & MSS_MAC_EVENT_PACKET_RECEIVED ) != 0UL )

347 {

348 /* An Ethernet Rx event has occurred. */

349 xQueueSendFromISR( xEMACEventQueue, &ulRxEvent, &lHigherPriorityTaskWoken );

350 }

351

352 portEND_SWITCHING_ISR( lHigherPriorityTaskWoken );

353 }

354 /*-----------------------------------------------------------*/

355

356 static void prvInitEmac( void )

357 {

358 const unsigned char ucPHYAddress = 1;

359

360 /* Initialise the MAC and PHY hardware. */

361 MSS_MAC_init( ucPHYAddress );

362

363 /* Register the event listener. The Ethernet interrupt handler will call

364 this listener whenever an Rx or a Tx interrupt occurs. */

365 MSS_MAC_set_callback( ( MSS_MAC_callback_t ) prvEMACEventListener );

366

367 /* Setup the EMAC and the NVIC for MAC interrupts. */

368 NVIC_SetPriority( EthernetMAC_IRQn, configLIBRARY_MAX_SYSCALL_INTERRUPT_PRIORITY );

369 NVIC_EnableIRQ( EthernetMAC_IRQn );

370 }

371 /*-----------------------------------------------------------*/

372

373 void vEMACWrite( void )

374 {

375 const long lMaxAttempts = 10;

376 long lAttempt;

377 const TickType_t xShortDelay = ( 5 / portTICK_PERIOD_MS );

378

379 /* Try to send data to the Ethernet. Keep trying for a while if data cannot

380 be sent immediately. Note that this will actually cause the data to be sent

381 twice to get around delayed ACK problems when communicating with non real-

382 time TCP/IP stacks (such as a Windows machine). */

383 for( lAttempt = 0; lAttempt < lMaxAttempts; lAttempt++ )

384 {

385 if( MSS_MAC_tx_packet( uip_len ) != 0 )

386 {

387 break;

388 }

389 else

390 {

391 vTaskDelay( xShortDelay );

392 }

393 }

394 }

395 /*-----------------------------------------------------------*/

396

397 static void prvUIPTimerCallback( TimerHandle_t xTimer )

398 {

399 static const unsigned long ulARPTimerExpired = uipARP_TIMER_EVENT;

400 static const unsigned long ulPeriodicTimerExpired = uipPERIODIC_TIMER_EVENT;

401

402 /* This is a time callback, so calls to xQueueSend() must not attempt to

403 block. As this callback is assigned to both the ARP and Periodic timers, the

404 first thing to do is ascertain which timer it was that actually expired. */

405 switch( ( int ) pvTimerGetTimerID( xTimer ) )

406 {

407 case uipARP_TIMER : xQueueSend( xEMACEventQueue, &ulARPTimerExpired, uipDONT_BLOCK );

408 break;

409

410 case uipPERIODIC_TIMER : xQueueSend( xEMACEventQueue, &ulPeriodicTimerExpired, uipDONT_BLOCK );

411 break;

412

413 default : /* Should not get here. */

414 break;

415 }

416 }

417 /*-----------------------------------------------------------*/

418

419 void vApplicationProcessFormInput( char *pcInputString )

420 {

421 char *c;

422

423 /* Only interested in processing form input if this is the IO page. */

424 c = strstr( pcInputString, "io.shtml" );

425

426 if( c )

427 {

428 /* Is there a command in the string? */

429 c = strstr( pcInputString, "?" );

430 if( c )

431 {

432 /* Turn the LED's on or off in accordance with the check box status. */

433 if( strstr( c, "LED0=1" ) != NULL )

434 {

435 /* Turn the LEDs on. */

436 vParTestSetLED( 3, 1 );

437 vParTestSetLED( 4, 1 );

438 }

439 else

440 {

441 /* Turn the LEDs off. */

442 vParTestSetLED( 3, 0 );

443 vParTestSetLED( 4, 0 );

444 }

445 }

446 else

447 {

448 /* Commands to turn LEDs off are not always explicit. */

449 vParTestSetLED( 3, 0 );

450 vParTestSetLED( 4, 0 );

451 }

452 }

453 }

454 /*-----------------------------------------------------------*/