begriffs open source - cmsis-freertos/blob - Demo/CORTEX_LPC1768_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 * *

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

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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

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

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65 mission critical applications that require provable dependability.

66

67 1 tab == 4 spaces!

68 */

69

70

71 /*

72 * Creates all the demo application tasks, then starts the scheduler. The WEB

73 * documentation provides more details of the standard demo application tasks

74 * (which just exist to test the kernel port and provide an example of how to use

75 * each FreeRTOS API function).

76 *

77 * In addition to the standard demo tasks, the following tasks and tests are

78 * defined and/or created within this file:

79 *

80 * "Check" hook - This only executes fully every five seconds from the tick

81 * hook. Its main function is to check that all the standard demo tasks are

82 * still operational. The status can be viewed using on the Task Stats page

83 * served by the WEB server.

84 *

85 * "uIP" task - This is the task that handles the uIP stack. All TCP/IP

86 * processing is performed in this task.

87 *

88 * "USB" task - Enumerates the USB device as a CDC class, then echoes back all

89 * received characters with a configurable offset (for example, if the offset

90 * is 1 and 'A' is received then 'B' will be sent back). A dumb terminal such

91 * as Hyperterminal can be used to talk to the USB task.

92 */

93

94 /* Scheduler includes. */

95 #include "FreeRTOS.h"

96 #include "task.h"

97

98 /* Demo app includes. */

99 #include "BlockQ.h"

100 #include "integer.h"

101 #include "blocktim.h"

102 #include "flash.h"

103 #include "partest.h"

104 #include "semtest.h"

105 #include "PollQ.h"

106 #include "GenQTest.h"

107 #include "QPeek.h"

108 #include "recmutex.h"

109

110 /*-----------------------------------------------------------*/

111

112 /* The time between cycles of the 'check' functionality (defined within the

113 tick hook). */

114 #define mainCHECK_DELAY ( ( TickType_t ) 5000 / portTICK_PERIOD_MS )

115

116 /* Task priorities. */

117 #define mainQUEUE_POLL_PRIORITY ( tskIDLE_PRIORITY + 2 )

118 #define mainSEM_TEST_PRIORITY ( tskIDLE_PRIORITY + 1 )

119 #define mainBLOCK_Q_PRIORITY ( tskIDLE_PRIORITY + 2 )

120 #define mainUIP_TASK_PRIORITY ( tskIDLE_PRIORITY + 3 )

121 #define mainINTEGER_TASK_PRIORITY ( tskIDLE_PRIORITY )

122 #define mainGEN_QUEUE_TASK_PRIORITY ( tskIDLE_PRIORITY )

123 #define mainFLASH_TASK_PRIORITY ( tskIDLE_PRIORITY + 2 )

124

125 /* The WEB server has a larger stack as it utilises stack hungry string

126 handling library calls. */

127 #define mainBASIC_WEB_STACK_SIZE ( configMINIMAL_STACK_SIZE * 4 )

128

129 /* The message displayed by the WEB server when all tasks are executing

130 without an error being reported. */

131 #define mainPASS_STATUS_MESSAGE "All tasks are executing without error."

132

133 /*-----------------------------------------------------------*/

134

135 /*

136 * Configure the hardware for the demo.

137 */

138 static void prvSetupHardware( void );

139

140 /*

141 * The task that handles the uIP stack. All TCP/IP processing is performed in

142 * this task.

143 */

144 extern void vuIP_Task( void *pvParameters );

145

146 /*

147 * The task that handles the USB stack.

148 */

149 extern void vUSBTask( void *pvParameters );

150

151 /*

152 * Simply returns the current status message for display on served WEB pages.

153 */

154 char *pcGetTaskStatusMessage( void );

155

156 /*-----------------------------------------------------------*/

157

158 /* Holds the status message displayed by the WEB server. */

159 static char *pcStatusMessage = mainPASS_STATUS_MESSAGE;

160

161 /*-----------------------------------------------------------*/

162

163 int main( void )

164 {

165 /* Configure the hardware for use by this demo. */

166 prvSetupHardware();

167

168 /* Start the standard demo tasks. These are just here to exercise the

169 kernel port and provide examples of how the FreeRTOS API can be used. */

170 vStartBlockingQueueTasks( mainBLOCK_Q_PRIORITY );

171 vCreateBlockTimeTasks();

172 vStartSemaphoreTasks( mainSEM_TEST_PRIORITY );

173 vStartPolledQueueTasks( mainQUEUE_POLL_PRIORITY );

174 vStartIntegerMathTasks( mainINTEGER_TASK_PRIORITY );

175 vStartGenericQueueTasks( mainGEN_QUEUE_TASK_PRIORITY );

176 vStartQueuePeekTasks();

177 vStartRecursiveMutexTasks();

178 vStartLEDFlashTasks( mainFLASH_TASK_PRIORITY );

179

180 /* Create the USB task. */

181 xTaskCreate( vUSBTask, "USB", configMINIMAL_STACK_SIZE, ( void * ) NULL, tskIDLE_PRIORITY, NULL );

182

183 /* Create the uIP task. The WEB server runs in this task. */

184 xTaskCreate( vuIP_Task, "uIP", mainBASIC_WEB_STACK_SIZE, ( void * ) NULL, mainUIP_TASK_PRIORITY, NULL );

185

186 /* Start the scheduler. */

187 vTaskStartScheduler();

188

189 /* Will only get here if there was insufficient memory to create the idle

190 task. The idle task is created within vTaskStartScheduler(). */

191 for( ;; );

192 }

193 /*-----------------------------------------------------------*/

194

195 void vApplicationTickHook( void )

196 {

197 static unsigned long ulTicksSinceLastDisplay = 0;

198

199 /* Called from every tick interrupt as described in the comments at the top

200 of this file.

201

202 Have enough ticks passed to make it time to perform our health status

203 check again? */

204 ulTicksSinceLastDisplay++;

205 if( ulTicksSinceLastDisplay >= mainCHECK_DELAY )

206 {

207 /* Reset the counter so these checks run again in mainCHECK_DELAY

208 ticks time. */

209 ulTicksSinceLastDisplay = 0;

210

211 /* Has an error been found in any task? */

212 if( xAreGenericQueueTasksStillRunning() != pdTRUE )

213 {

214 pcStatusMessage = "An error has been detected in the Generic Queue test/demo.";

215 }

216 else if( xAreQueuePeekTasksStillRunning() != pdTRUE )

217 {

218 pcStatusMessage = "An error has been detected in the Peek Queue test/demo.";

219 }

220 else if( xAreBlockingQueuesStillRunning() != pdTRUE )

221 {

222 pcStatusMessage = "An error has been detected in the Block Queue test/demo.";

223 }

224 else if( xAreBlockTimeTestTasksStillRunning() != pdTRUE )

225 {

226 pcStatusMessage = "An error has been detected in the Block Time test/demo.";

227 }

228 else if( xAreSemaphoreTasksStillRunning() != pdTRUE )

229 {

230 pcStatusMessage = "An error has been detected in the Semaphore test/demo.";

231 }

232 else if( xArePollingQueuesStillRunning() != pdTRUE )

233 {

234 pcStatusMessage = "An error has been detected in the Poll Queue test/demo.";

235 }

236 else if( xAreIntegerMathsTaskStillRunning() != pdTRUE )

237 {

238 pcStatusMessage = "An error has been detected in the Int Math test/demo.";

239 }

240 else if( xAreRecursiveMutexTasksStillRunning() != pdTRUE )

241 {

242 pcStatusMessage = "An error has been detected in the Mutex test/demo.";

243 }

244 }

245 }

246 /*-----------------------------------------------------------*/

247

248 char *pcGetTaskStatusMessage( void )

249 {

250 /* Not bothered about a critical section here. */

251 return pcStatusMessage;

252 }

253 /*-----------------------------------------------------------*/

254

255 void prvSetupHardware( void )

256 {

257 /* Disable peripherals power. */

258 SC->PCONP = 0;

259

260 /* Enable GPIO power. */

261 SC->PCONP = PCONP_PCGPIO;

262

263 /* Disable TPIU. */

264 PINCON->PINSEL10 = 0;

265

266 /* Setup the peripheral bus to be the same as the CPU output (100 MHz). */

267 SC->PCLKSEL0 = 0x05555555;

268

269 /* Configure the LEDs. */

270 vParTestInitialise();

271 }

272 /*-----------------------------------------------------------*/

273

274 void vApplicationStackOverflowHook( TaskHandle_t pxTask, char *pcTaskName )

275 {

276 /* This function will get called if a task overflows its stack. */

277

278 ( void ) pxTask;

279 ( void ) pcTaskName;

280

281 for( ;; );

282 }

283 /*-----------------------------------------------------------*/

284

285 void vConfigureTimerForRunTimeStats( void )

286 {

287 const unsigned long TCR_COUNT_RESET = 2, CTCR_CTM_TIMER = 0x00, TCR_COUNT_ENABLE = 0x01;

288

289 /* This function configures a timer that is used as the time base when

290 collecting run time statistical information - basically the percentage

291 of CPU time that each task is utilising. It is called automatically when

292 the scheduler is started (assuming configGENERATE_RUN_TIME_STATS is set

293 to 1). */

294

295 /* Power up and feed the timer. */

296 SC->PCONP |= 0x02UL;

297 SC->PCLKSEL0 = (SC->PCLKSEL0 & (~(0x3<<2))) | (0x01 << 2);

298

299 /* Reset Timer 0 */

300 TIM0->TCR = TCR_COUNT_RESET;

301

302 /* Just count up. */

303 TIM0->CTCR = CTCR_CTM_TIMER;

304

305 /* Prescale to a frequency that is good enough to get a decent resolution,

306 but not too fast so as to overflow all the time. */

307 TIM0->PR = ( configCPU_CLOCK_HZ / 10000UL ) - 1UL;

308

309 /* Start the counter. */

310 TIM0->TCR = TCR_COUNT_ENABLE;

311 }

312 /*-----------------------------------------------------------*/

313