begriffs open source - cmsis-freertos/blob - Demo/WizNET_DEMO_GCC

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.

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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 *

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

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

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

38

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

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65 mission critical applications that require provable dependability.

66

67 1 tab == 4 spaces!

68 */

69

70 /*

71 NOTE : Tasks run in system mode and the scheduler runs in Supervisor mode.

72 The processor MUST be in supervisor mode when vTaskStartScheduler is

73 called. The demo applications included in the FreeRTOS.org download switch

74 to supervisor mode prior to main being called. If you are not using one of

75 these demo application projects then ensure Supervisor mode is used.

76 */

77

78

79 /*

80 * Program entry point.

81 *

82 * main() is responsible for setting up the microcontroller peripherals, then

83 * starting the demo application tasks. Once the tasks have been created the

84 * scheduler is started and main() should never complete.

85 *

86 * The demo creates the three standard 'flash' tasks to provide some visual

87 * feedback that the system and scheduler are still operating correctly.

88 *

89 * The HTTP server task operates at the highest priority so will always preempt

90 * the flash or idle task on TCP/IP events.

91 */

92

93 /* Standard includes. */

94 #include <stdlib.h>

95

96 /* Scheduler include files. */

97 #include "FreeRTOS.h"

98 #include "semphr.h"

99 #include "task.h"

100

101 /* Application includes. */

102 #include "i2c.h"

103 #include "HTTP_Serv.h"

104 #include "flash.h"

105 #include "partest.h"

106 #include "dynamic.h"

107 #include "semtest.h"

108 #include "PollQ.h"

109 #include "BlockQ.h"

110 #include "integer.h"

111

112 /*-----------------------------------------------------------*/

113

114 /* Constants to setup the PLL. */

115 #define mainPLL_MUL_4 ( ( unsigned char ) 0x0003 )

116 #define mainPLL_DIV_1 ( ( unsigned char ) 0x0000 )

117 #define mainPLL_ENABLE ( ( unsigned char ) 0x0001 )

118 #define mainPLL_CONNECT ( ( unsigned char ) 0x0003 )

119 #define mainPLL_FEED_BYTE1 ( ( unsigned char ) 0xaa )

120 #define mainPLL_FEED_BYTE2 ( ( unsigned char ) 0x55 )

121 #define mainPLL_LOCK ( ( unsigned long ) 0x0400 )

122

123 /* Constants to setup the MAM. */

124 #define mainMAM_TIM_3 ( ( unsigned char ) 0x03 )

125 #define mainMAM_MODE_FULL ( ( unsigned char ) 0x02 )

126

127 /* Constants to setup the peripheral bus. */

128 #define mainBUS_CLK_FULL ( ( unsigned char ) 0x01 )

129

130 /* Constants to setup I/O and processor. */

131 #define mainBUS_CLK_FULL ( ( unsigned char ) 0x01 )

132 #define mainLED_TO_OUTPUT ( ( unsigned long ) 0xff0000 )

133 #define mainJTAG_PORT ( ( unsigned long ) 0x3E0000UL )

134

135 /* Priorities for the demo application tasks. */

136 #define mainLED_TASK_PRIORITY ( tskIDLE_PRIORITY + 1 )

137 #define mainHTTP_TASK_PRIORITY ( tskIDLE_PRIORITY + 2 )

138 #define mainBLOCK_Q_PRIORITY ( tskIDLE_PRIORITY + 2 )

139 #define mainQUEUE_POLL_PRIORITY ( tskIDLE_PRIORITY + 2 )

140 #define mainERROR_CHECK_PRIORITY ( tskIDLE_PRIORITY + 1 )

141

142 /* Flash rates of the on board LED to indicate the health of the system. */

143 #define mainNO_ERROR_DELAY ( 3000 )

144 #define mainERROR_DELAY ( 500 )

145 #define mainON_BOARD_LED_BIT ( ( unsigned long ) 0x80 )

146

147 /*-----------------------------------------------------------*/

148

149 /*

150 * The Olimex demo board has a single built in LED. This function simply

151 * toggles its state.

152 */

153 void prvToggleOnBoardLED( void );

154

155 /*

156 * Configure the processor for use with the Olimex demo board.

157 */

158 static void prvSetupHardware( void );

159

160 /*

161 * Simply check for errors and toggle the onboard LED.

162 */

163 static void prvErrorChecks( void *pvParameters );

164

165 /*

166 * Return true if the demo tasks are executing without error - otherwise

167 * return false.

168 */

169 static void prvMainCheckOtherTasksAreStillRunning( void );

170 /*-----------------------------------------------------------*/

171

172 /* Flag set by prvMainCheckOtherTasksAreStillExecuting(). */

173 long lErrorInTask = pdFALSE;

174

175 /*

176 * Application entry point:

177 * Starts all the other tasks, then starts the scheduler.

178 */

179 int main( void )

180 {

181 /* Setup the hardware for use with the Olimex demo board. */

182 prvSetupHardware();

183

184 /* Start the standard flash tasks so the WEB server is not the only thing

185 running. */

186 vStartLEDFlashTasks( mainLED_TASK_PRIORITY );

187 vStartSemaphoreTasks( tskIDLE_PRIORITY );

188 vStartDynamicPriorityTasks();

189 vStartPolledQueueTasks( mainQUEUE_POLL_PRIORITY );

190 vStartBlockingQueueTasks( mainBLOCK_Q_PRIORITY );

191 vStartIntegerMathTasks( tskIDLE_PRIORITY );

192

193 /* Start the WEB server task and the error check task. */

194 xTaskCreate( vHTTPServerTask, "HTTP", configMINIMAL_STACK_SIZE, NULL, mainHTTP_TASK_PRIORITY, NULL );

195 xTaskCreate( prvErrorChecks, "Check", configMINIMAL_STACK_SIZE, NULL, mainERROR_CHECK_PRIORITY, NULL );

196

197 /* Now all the tasks have been started - start the scheduler.

198

199 NOTE : Tasks run in system mode and the scheduler runs in Supervisor mode.

200 The processor MUST be in supervisor mode when vTaskStartScheduler is

201 called. The demo applications included in the FreeRTOS.org download switch

202 to supervisor mode prior to main being called. If you are not using one of

203 these demo application projects then ensure Supervisor mode is used. */

204 vTaskStartScheduler();

205

206 /* Should never reach here! */

207 return 0;

208 }

209 /*-----------------------------------------------------------*/

210

211 static void prvSetupHardware( void )

212 {

213 #ifdef RUN_FROM_RAM

214 /* Remap the interrupt vectors to RAM if we are are running from RAM. */

215 SCB_MEMMAP = 2;

216 #endif

217

218 /* Set all GPIO to output other than the P0.14 (BSL), and the JTAG pins.

219 The JTAG pins are left as input as I'm not sure what will happen if the

220 Wiggler is connected after powerup - not that it would be a good idea to

221 do that anyway. */

222 GPIO_IODIR = ~( mainJTAG_PORT );

223

224 /* Setup the PLL to multiply the XTAL input by 4. */

225 SCB_PLLCFG = ( mainPLL_MUL_4 | mainPLL_DIV_1 );

226

227 /* Activate the PLL by turning it on then feeding the correct sequence of

228 bytes. */

229 SCB_PLLCON = mainPLL_ENABLE;

230 SCB_PLLFEED = mainPLL_FEED_BYTE1;

231 SCB_PLLFEED = mainPLL_FEED_BYTE2;

232

233 /* Wait for the PLL to lock... */

234 while( !( SCB_PLLSTAT & mainPLL_LOCK ) );

235

236 /* ...before connecting it using the feed sequence again. */

237 SCB_PLLCON = mainPLL_CONNECT;

238 SCB_PLLFEED = mainPLL_FEED_BYTE1;

239 SCB_PLLFEED = mainPLL_FEED_BYTE2;

240

241 /* Setup and turn on the MAM. Three cycle access is used due to the fast

242 PLL used. It is possible faster overall performance could be obtained by

243 tuning the MAM and PLL settings. */

244 MAM_TIM = mainMAM_TIM_3;

245 MAM_CR = mainMAM_MODE_FULL;

246

247 /* Setup the peripheral bus to be the same as the PLL output. */

248 SCB_VPBDIV = mainBUS_CLK_FULL;

249

250 /* Initialise the i2c peripheral. */

251 i2cInit();

252

253 /* Initialise the LED's used by the flash tasks. */

254 vParTestInitialise();

255 }

256 /*-----------------------------------------------------------*/

257

258 static void prvMainCheckOtherTasksAreStillRunning( void )

259 {

260 /* Check all the demo tasks (other than the flash tasks) to ensure

261 that they are all still running, and that none of them have detected

262 an error. */

263

264 /* This function is called from more than one task. */

265 if( xAreIntegerMathsTaskStillRunning() != pdTRUE )

266 {

267 lErrorInTask = pdTRUE;

268 }

269

270 if( xArePollingQueuesStillRunning() != pdTRUE )

271 {

272 lErrorInTask = pdTRUE;

273 }

274

275 if( xAreSemaphoreTasksStillRunning() != pdTRUE )

276 {

277 lErrorInTask = pdTRUE;

278 }

279

280 if( xAreDynamicPriorityTasksStillRunning() != pdTRUE )

281 {

282 lErrorInTask = pdTRUE;

283 }

284

285 if( xAreBlockingQueuesStillRunning() != pdTRUE )

286 {

287 lErrorInTask = pdTRUE;

288 }

289 }

290 /*-----------------------------------------------------------*/

291

292 void prvToggleOnBoardLED( void )

293 {

294 unsigned long ulState;

295

296 ulState = GPIO0_IOPIN;

297 if( ulState & mainON_BOARD_LED_BIT )

298 {

299 GPIO_IOCLR = mainON_BOARD_LED_BIT;

300 }

301 else

302 {

303 GPIO_IOSET = mainON_BOARD_LED_BIT;

304 }

305 }

306 /*-----------------------------------------------------------*/

307

308 static void prvErrorChecks( void *pvParameters )

309 {

310 TickType_t xDelay = mainNO_ERROR_DELAY;

311

312 /* The parameters are not used. */

313 ( void ) pvParameters;

314

315 for( ;; )

316 {

317 /* How long we delay depends on whether an error has been detected

318 or not. Therefore the flash rate of the on board LED indicates

319 whether or not an error has occurred. */

320 vTaskDelay( xDelay );

321

322 /* Update the lErrorInTask flag. */

323 prvMainCheckOtherTasksAreStillRunning();

324

325 if( lErrorInTask )

326 {

327 /* An error has been found so reduce the delay period and in so

328 doing speed up the flash rate of the on board LED. */

329 xDelay = mainERROR_DELAY;

330 }

331

332 prvToggleOnBoardLED();

333 }

334 }

335