begriffs open source - cmsis-freertos/blob - Demo/PIC32MEC14xx

1 /*

2 * FreeRTOS Kernel V10.0.1

4 *

5 * Permission is hereby granted, free of charge, to any person obtaining a copy of

6 * this software and associated documentation files (the "Software"), to deal in

7 * the Software without restriction, including without limitation the rights to

8 * use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of

9 * the Software, and to permit persons to whom the Software is furnished to do so,

10 * subject to the following conditions:

11 *

12 * The above copyright notice and this permission notice shall be included in all

13 * copies or substantial portions of the Software.

14 *

15 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR

16 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS

17 * FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR

18 * COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER

19 * IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN

20 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.

21 *

22 * http://www.FreeRTOS.org

23 * http://aws.amazon.com/freertos

24 *

25 * 1 tab == 4 spaces!

26 */

27

28 /******************************************************************************

29 * This project provides two demo applications. A simple blinky style project,

30 * and a more comprehensive test and demo application. The

31 * mainCREATE_SIMPLE_BLINKY_DEMO_ONLY setting (defined in this file) is used to

32 * select between the two. The simply blinky demo is implemented and described

33 * in main_blinky.c. The more comprehensive test and demo application is

34 * implemented and described in main_full.c.

35 *

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

37 * hardware setup and FreeRTOS hook functions.

38 *****************************************************************************/

39

40 /* Kernel includes. */

41 #include "FreeRTOS.h"

42 #include "task.h"

43 #include "queue.h"

44 #include "timers.h"

45

46 /* Target includes. */

47 #include "appcfg.h"

48 #include "MEC14xx/mec14xx.h"

49 #include "MEC14xx/mec14xx_jtvic.h"

50 #include "MEC14xx/mec14xx_bbled.h"

51 #include "MEC14xx/mec14xx_girqs.h"

52

53 /* Set mainCREATE_SIMPLE_BLINKY_DEMO_ONLY to one to run the simple blinky demo,

54 or 0 to run the more comprehensive test and demo application. */

55 #define mainCREATE_SIMPLE_BLINKY_DEMO_ONLY 0

56

57 /*-----------------------------------------------------------*/

58

59 /*

60 * main_blinky() is used when mainCREATE_SIMPLE_BLINKY_DEMO_ONLY is set to 1.

61 * main_full() is used when mainCREATE_SIMPLE_BLINKY_DEMO_ONLY is set to 0.

62 */

63 extern void main_blinky( void );

64 extern void main_full( void );

65

66 /*

67 * Performs any hardware setup necessary.

68 */

69 static void __attribute__((nomips16)) prvSetupHardware( void );

70

71 /*

72 * Add some thread safety to the LED toggle function.

73 */

74 void vToggleLED( uint8_t ucLED );

75

76 /*-----------------------------------------------------------*/

77

78 int main( void )

79 {

80 /* Perform any hardware initialisation necessary. */

81 prvSetupHardware();

82

83 /* The mainCREATE_SIMPLE_BLINKY_DEMO_ONLY setting is described at the top

84 of this file. */

85 #if mainCREATE_SIMPLE_BLINKY_DEMO_ONLY == 1

86 {

87 main_blinky();

88 }

89 #else

90 {

91 main_full();

92 }

93 #endif

94

95 /* Should never be reached. */

96 return 0;

97 }

98 /*-----------------------------------------------------------*/

99

100 void vToggleLED( uint8_t ucLED )

101 {

102 taskENTER_CRITICAL();

103 {

104 led_out_toggle( ucLED );

105 }

106 taskEXIT_CRITICAL();

107 }

108 /*-----------------------------------------------------------*/

109

110 static void __attribute__((nomips16)) prvSetupHardware( void )

111 {

112 volatile uint32_t ulTemp;

113

114 /* Interrupts are automatically re-enabled when the scheduler is started. */

115 __asm volatile( "di" );

116

117 /* Enable M14K Vector Pre-fetch: CP0.IntCtl b[22]=1

118 IRET (interrupt chaining): b[21]=1

119 Enable Auto-Prolog: b[14]=1 */

120 ulTemp = _CP0_GET_INTCTL();

121 ulTemp |= ( 1ul << 22 ) + ( 1ul << 21 ) + ( 1ul << 14 );

122 _CP0_SET_INTCTL( ulTemp );

123

124 /* Configure 32KHz for Switched Clock Source always ON

125 b[ 0 ] = XOSEL = 1

126 b[ 1 ] = EXT_32K_OSC_EN = 1

127 b[ 2 ] = INT_32K_OSC_EN = 1

128 b[ 3 ] = INT_32K_VTR_PWR_WELL_EMUL = 0

129 b[ 4 ] = 32K_SWITCHER_CTRL = 0 */

130 VBAT_REGS->CLOCK_ENABLE = 0x07;

131

132 ulTemp = 256;

133 while (ulTemp--)

134 {

135 __asm volatile( "NOP" );

136 __asm volatile( "NOP" );

137 __asm volatile( "NOP" );

138 __asm volatile( "NOP" );

139 }

140

141 /* Disaggregate GIRQ23 & GIRQ24 for FreeRTOS. Second parameter is a bit-map

142 for each GIRQ where

143 0 = Aggregated, 1 = Dis-aggregate

144 Bit position = GIRQ_Number - 8

145 Example: GIRQ23 ( 23 - 8 ) = 15

146 Dis-aggregate GIRQ23 & GIRQ24

147 The symbols JTVIC_DISAGR_BITMAP is generated in header file mec14xx_girqm.h

148

149 Each disaggregated interrupt handler is spaced 8-bytes apart starting at

150 base address for that GIRQ. */

151 jtvic_init( dflt_ih_table, ( JTVIC_DISAGR_BITMAP ), ( JTVIC_FLAG_DISAGR_SPACING_8 ) );

152

153 /* Initialise the LEDs. */

154 for( ulTemp = 0; ulTemp < LED_ID_MAX; ulTemp++ )

155 {

156 led_sleep_en( ulTemp, ADISABLE );

157 led_init( ulTemp );

158 led_out_high( ulTemp );

159 }

160 }

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

162

163 void vApplicationMallocFailedHook( void )

164 {

165 /* vApplicationMallocFailedHook() will only be called if

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

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

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

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

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

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

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

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

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

175 taskDISABLE_INTERRUPTS();

176 for( ;; );

177 }

178 /*-----------------------------------------------------------*/

179

180 void vApplicationIdleHook( void )

181 {

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

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

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

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

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

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

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

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

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

191 }

192 /*-----------------------------------------------------------*/

193

194 void vApplicationStackOverflowHook( TaskHandle_t pxTask, char *pcTaskName )

195 {

196 ( void ) pcTaskName;

197 ( void ) pxTask;

198

199 /* Run time task stack overflow checking is performed if

200 configCHECK_FOR_STACK_OVERFLOW is defined to 1 or 2. This hook function is

201 called if a task stack overflow is detected. Note the system/interrupt

202 stack is not checked. */

203 taskDISABLE_INTERRUPTS();

204 for( ;; );

205 }

206 /*-----------------------------------------------------------*/

207

208 void vApplicationTickHook( void )

209 {

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

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

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

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

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

215 }

216 /*-----------------------------------------------------------*/

217

218 void vAssertCalled( const char * pcFile, unsigned long ulLine )

219 {

220 volatile char *pcFileName;

221 volatile unsigned long ulLineNumber;

222

223 /* Prevent things that are useful to view in the debugger from being

224 optimised away. */

225 pcFileName = ( char * ) pcFile;

226 ( void ) pcFileName;

227 ulLineNumber = ulLine;

228

229 /* Set ulLineNumber to 0 in the debugger to break out of this loop and

230 return to the line that triggered the assert. */

231 while( ulLineNumber != 0 )

232 {

233 __asm volatile( "NOP" );

234 __asm volatile( "NOP" );

235 __asm volatile( "NOP" );

236 __asm volatile( "NOP" );

237 __asm volatile( "NOP" );

238 }

239 }

240