begriffs open source - cmsis-freertos/blob - Demo/CORTEX_STM32L152_Discovery

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

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

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

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

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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 /******************************************************************************

71 * This project provides two demo applications. A low power project that

72 * demonstrates the FreeRTOS tickless mode, and a more comprehensive test and

73 * demo application. The configCREATE_LOW_POWER_DEMO setting (defined at the

74 * top of FreeRTOSConfig.h) is used to select between the two. The low power

75 * demo is implemented and described in main_low_power.c. The more

76 * comprehensive test and demo application is implemented and described in

77 * main_full.c.

78 *

79 * This file implements the code that is not demo specific, including the

80 * hardware setup and FreeRTOS hook functions.

81 */

82

83 /* Kernel includes. */

84 #include "FreeRTOS.h"

85 #include "task.h"

86

87 /* ST library functions. */

88 #include "stm32l1xx.h"

89 #include "discover_board.h"

90

91 /*-----------------------------------------------------------*/

92

93 /*

94 * Set up the hardware ready to run this demo.

95 */

96 static void prvSetupHardware( void );

97

98 /*

99 * main_low_power() is used when configCREATE_LOW_POWER_DEMO is set to 1.

100 * main_full() is used when configCREATE_LOW_POWER_DEMO is set to 0.

101 * configCREATE_LOW_POWER_DEMO is defined at the top of main.c.

102 */

103 extern void main_low_power( void );

104 extern void main_full( void );

105

106 /* Prototypes for the standard FreeRTOS callback/hook functions implemented

107 within this file. */

108 void vApplicationMallocFailedHook( void );

109 void vApplicationIdleHook( void );

110 void vApplicationStackOverflowHook( TaskHandle_t pxTask, char *pcTaskName );

111 void vApplicationTickHook( void );

112

113 /*-----------------------------------------------------------*/

114

115 int main( void )

116 {

117 /* Prepare the hardware to run this demo. */

118 prvSetupHardware();

119

120 /* The configCREATE_LOW_POWER_DEMO setting is described at the top of

121 this file. */

122 #if configCREATE_LOW_POWER_DEMO == 1

123 {

124 main_low_power();

125 }

126 #else

127 {

128 main_full();

129 }

130 #endif

131

132 /* This line will never be reached. */

133 return 0;

134 }

135 /*-----------------------------------------------------------*/

136

137 static void prvSetupHardware( void )

138 {

139 /* GPIO, EXTI and NVIC Init structure declaration */

140 GPIO_InitTypeDef GPIO_InitStructure;

141 EXTI_InitTypeDef EXTI_InitStructure;

142 NVIC_InitTypeDef NVIC_InitStructure;

143 void SystemCoreClockUpdate( void );

144

145 /* System function that updates the SystemCoreClock variable. */

146 SystemCoreClockUpdate();

147

148 /* Essential on STM32 Cortex-M devices. */

149 NVIC_PriorityGroupConfig( NVIC_PriorityGroup_4 );

150

151 /* Systick is fed from HCLK/8. */

152 SysTick_CLKSourceConfig( SysTick_CLKSource_HCLK_Div8 );

153

154 /* Set MSI clock range to ~4.194MHz. */

155 RCC_MSIRangeConfig( RCC_MSIRange_6 );

156

157 /* Enable the GPIOs clocks. */

159

160 /* Enable comparator clocks. */

161 RCC_APB1PeriphClockCmd( RCC_APB1Periph_COMP, ENABLE );

162

163 /* Enable SYSCFG clocks. */

164 RCC_APB2PeriphClockCmd( RCC_APB2Periph_SYSCFG , ENABLE );

165

166 /* Set internal voltage regulator to 1.5V. */

167 PWR_VoltageScalingConfig( PWR_VoltageScaling_Range2 );

168

169 /* Wait Until the Voltage Regulator is ready. */

170 while( PWR_GetFlagStatus( PWR_FLAG_VOS ) != RESET );

171

172 /* Configure User Button pin as input */

173 GPIO_InitStructure.GPIO_Pin = USERBUTTON_GPIO_PIN;

174 GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IN;

175 GPIO_InitStructure.GPIO_PuPd = GPIO_PuPd_NOPULL;

176 GPIO_InitStructure.GPIO_Speed = GPIO_Speed_40MHz;

177 GPIO_Init( USERBUTTON_GPIO_PORT, &GPIO_InitStructure );

178

179 /* Select User Button pin as input source for EXTI Line */

180 SYSCFG_EXTILineConfig( EXTI_PortSourceGPIOA, EXTI_PinSource0 );

181

182 /* Configure EXT1 Line 0 in interrupt mode trigged on Rising edge */

183 EXTI_InitStructure.EXTI_Line = EXTI_Line0 ; /* PA0 for User button AND IDD_WakeUP */

184 EXTI_InitStructure.EXTI_Mode = EXTI_Mode_Interrupt;

185 EXTI_InitStructure.EXTI_Trigger = EXTI_Trigger_Rising;

186 EXTI_InitStructure.EXTI_LineCmd = ENABLE;

187 EXTI_Init( &EXTI_InitStructure );

188

189 /* Enable and set EXTI0 Interrupt to the lowest priority */

190 NVIC_InitStructure.NVIC_IRQChannel = EXTI0_IRQn;

191 NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = configLIBRARY_LOWEST_INTERRUPT_PRIORITY;

192 NVIC_InitStructure.NVIC_IRQChannelSubPriority = 0;

193 NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;

194 NVIC_Init( &NVIC_InitStructure );

195

196 /* Configure the LED_pin as output push-pull for LD3 & LD4 usage */

197 GPIO_InitStructure.GPIO_Pin = LD_GREEN_GPIO_PIN | LD_BLUE_GPIO_PIN;

198 GPIO_InitStructure.GPIO_Mode = GPIO_Mode_OUT;

199 GPIO_InitStructure.GPIO_OType = GPIO_OType_PP;

200 GPIO_InitStructure.GPIO_PuPd = GPIO_PuPd_NOPULL;

201 GPIO_InitStructure.GPIO_Speed = GPIO_Speed_2MHz;

202 GPIO_Init( LD_GPIO_PORT, &GPIO_InitStructure );

203

204 /* Force a low level on LEDs */

205 GPIO_LOW( LD_GPIO_PORT, LD_GREEN_GPIO_PIN );

206 GPIO_LOW( LD_GPIO_PORT, LD_BLUE_GPIO_PIN );

207 }

208 /*-----------------------------------------------------------*/

209

210 void vApplicationMallocFailedHook( void )

211 {

212 /* vApplicationMallocFailedHook() will only be called if

213 configUSE_MALLOC_FAILED_HOOK is set to 1 in FreeRTOSConfig.h. It is a hook

214 function that will get called if a call to pvPortMalloc() fails.

215 pvPortMalloc() is called internally by the kernel whenever a task, queue,

216 timer or semaphore is created. It is also called by various parts of the

217 demo application. If heap_1.c or heap_2.c are used, then the size of the

218 heap available to pvPortMalloc() is defined by configTOTAL_HEAP_SIZE in

219 FreeRTOSConfig.h, and the xPortGetFreeHeapSize() API function can be used

220 to query the size of free heap space that remains (although it does not

221 provide information on how the remaining heap might be fragmented). */

222 taskDISABLE_INTERRUPTS();

223 for( ;; );

224 }

225 /*-----------------------------------------------------------*/

226

227 void vApplicationIdleHook( void )

228 {

229 /* vApplicationIdleHook() will only be called if configUSE_IDLE_HOOK is set

230 to 1 in FreeRTOSConfig.h. It will be called on each iteration of the idle

231 task. It is essential that code added to this hook function never attempts

232 to block in any way (for example, call xQueueReceive() with a block time

233 specified, or call vTaskDelay()). If the application makes use of the

234 vTaskDelete() API function (as this demo application does) then it is also

235 important that vApplicationIdleHook() is permitted to return to its calling

236 function, because it is the responsibility of the idle task to clean up

237 memory allocated by the kernel to any task that has since been deleted. */

238 }

239 /*-----------------------------------------------------------*/

240

241 void vApplicationStackOverflowHook( TaskHandle_t pxTask, char *pcTaskName )

242 {

243 ( void ) pcTaskName;

244 ( void ) pxTask;

245

246 /* Run time stack overflow checking is performed if

247 configCHECK_FOR_STACK_OVERFLOW is defined to 1 or 2. This hook

248 function is called if a stack overflow is detected. */

249 taskDISABLE_INTERRUPTS();

250 for( ;; );

251 }

252 /*-----------------------------------------------------------*/

253

254 void vApplicationTickHook( void )

255 {

256 /* This function will be called by each tick interrupt if

257 configUSE_TICK_HOOK is set to 1 in FreeRTOSConfig.h. User code can be

258 added here, but the tick hook is called from an interrupt context, so

259 code must not attempt to block, and only the interrupt safe FreeRTOS API

260 functions can be used (those that end in FromISR()). */

261 }

262 /*-----------------------------------------------------------*/

263

264 void vAssertCalled( unsigned long ulLine, const char * const pcFileName )

265 {

266 volatile unsigned long ulSetToNonZeroInDebuggerToContinue = 0;

267

268 /* Parameters are not used. */

269 ( void ) ulLine;

270 ( void ) pcFileName;

271

272 taskENTER_CRITICAL();

273 {

274 while( ulSetToNonZeroInDebuggerToContinue == 0 )

275 {

276 /* Use the debugger to set ulSetToNonZeroInDebuggerToContinue to a

277 non zero value to step out of this function to the point that raised

278 this assert(). */

279 __asm volatile( "NOP" );

280 __asm volatile( "NOP" );

281 }

282 }

283 taskEXIT_CRITICAL();

284 }

285