begriffs open source - cmsis-freertos/blob - Demo/PIC32MX

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 #include "FreeRTOS.h"

71 #include "IntQueueTimer.h"

72 #include "IntQueue.h"

73

74 #define timerINTERRUPT3_FREQUENCY ( 2000UL )

75 #define timerINTERRUPT4_FREQUENCY ( 2001UL )

76

77 void vT3InterruptHandler( void );

78 void vT4InterruptHandler( void );

79

80 /* As these interrupts use the FreeRTOS interrupt entry point, the IPL settings

81 in the following prototypes have no effect. The interrupt priorities are set

82 by the ConfigIntTimerX() library calls in vInitialiseTimerForIntQueueTest(). */

83 void __attribute__( (interrupt(IPL0AUTO), vector(_TIMER_3_VECTOR))) vT3InterruptWrapper( void );

84 void __attribute__( (interrupt(IPL0AUTO), vector(_TIMER_4_VECTOR))) vT4InterruptWrapper( void );

85

86 void vInitialiseTimerForIntQueueTest( void )

87 {

88 /* Timer 1 is used for the tick interrupt, timer 2 is used for the high

89 frequency interrupt test. This file therefore uses timers 3 and 4. */

90

91 T3CON = 0;

92 TMR3 = 0;

93 PR3 = ( unsigned short ) ( configPERIPHERAL_CLOCK_HZ / timerINTERRUPT3_FREQUENCY );

94

95 /* Setup timer 3 interrupt priority to be above the kernel priority. */

96 IPC3bits.T3IP = ( configMAX_SYSCALL_INTERRUPT_PRIORITY - 1 );

97

98 /* Clear the interrupt as a starting condition. */

99 IFS0bits.T3IF = 0;

100

101 /* Enable the interrupt. */

102 IEC0bits.T3IE = 1;

103

104 /* Start the timer. */

105 T3CONbits.TON = 1;

106

107

108 /* Do the same for timer 4. */

109 T4CON = 0;

110 TMR4 = 0;

111 PR4 = ( unsigned short ) ( configPERIPHERAL_CLOCK_HZ / timerINTERRUPT4_FREQUENCY );

112

113 /* Setup timer 4 interrupt priority to be above the kernel priority. */

114 IPC4bits.T4IP = configMAX_SYSCALL_INTERRUPT_PRIORITY;

115

116 /* Clear the interrupt as a starting condition. */

117 IFS0bits.T4IF = 0;

118

119 /* Enable the interrupt. */

120 IEC0bits.T4IE = 1;

121

122 /* Start the timer. */

123 T4CONbits.TON = 1;

124 }

125 /*-----------------------------------------------------------*/

126

127 void vT3InterruptHandler( void )

128 {

129 IFS0CLR = _IFS0_T3IF_MASK;

130 portEND_SWITCHING_ISR( xFirstTimerHandler() );

131 }

132 /*-----------------------------------------------------------*/

133

134 void vT4InterruptHandler( void )

135 {

136 IFS0CLR = _IFS0_T4IF_MASK;

137 portEND_SWITCHING_ISR( xSecondTimerHandler() );

138 }

139

140