2 * FreeRTOS Kernel V10.3.1
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29 * This file contains the non-portable and therefore RX specific parts of the
30 * IntQueue standard demo task - namely the configuration of the timers that
31 * generate the interrupts and the interrupt entry points.
34 /* Scheduler includes. */
39 #include "IntQueueTimer.h"
42 /* Hardware specifics. */
45 #define tmrTIMER_0_1_FREQUENCY ( 2000UL )
46 #define tmrTIMER_2_3_FREQUENCY ( 2407UL )
48 void vInitialiseTimerForIntQueueTest( void )
50 /* Ensure interrupts do not start until full configuration is complete. */
53 /* Give write access. */
54 SYSTEM.PRCR.WORD = 0xa502;
56 /* Cascade two 8bit timer channels to generate the interrupts.
57 8bit timer unit 1 (TMR0 and TMR1) and 8bit timer unit 2 (TMR2 and TMR3 are
58 utilised for this test. */
60 /* Enable the timers. */
61 SYSTEM.MSTPCRA.BIT.MSTPA5 = 0;
62 SYSTEM.MSTPCRA.BIT.MSTPA4 = 0;
64 /* Enable compare match A interrupt request. */
65 TMR0.TCR.BIT.CMIEA = 1;
66 TMR2.TCR.BIT.CMIEA = 1;
68 /* Clear the timer on compare match A. */
69 TMR0.TCR.BIT.CCLR = 1;
70 TMR2.TCR.BIT.CCLR = 1;
72 /* Set the compare match value. */
73 TMR01.TCORA = ( unsigned short ) ( ( ( configPERIPHERAL_CLOCK_HZ / tmrTIMER_0_1_FREQUENCY ) -1 ) / 8 );
74 TMR23.TCORA = ( unsigned short ) ( ( ( configPERIPHERAL_CLOCK_HZ / tmrTIMER_0_1_FREQUENCY ) -1 ) / 8 );
76 /* 16 bit operation ( count from timer 1,2 ). */
77 TMR0.TCCR.BIT.CSS = 3;
78 TMR2.TCCR.BIT.CSS = 3;
80 /* Use PCLK as the input. */
81 TMR1.TCCR.BIT.CSS = 1;
82 TMR3.TCCR.BIT.CSS = 1;
84 /* Divide PCLK by 8. */
85 TMR1.TCCR.BIT.CKS = 2;
86 TMR3.TCCR.BIT.CKS = 2;
88 /* Enable TMR 0, 2 interrupts. */
89 TMR0.TCR.BIT.CMIEA = 1;
90 TMR2.TCR.BIT.CMIEA = 1;
92 /* Set priority and enable interrupt. */
93 ICU.SLIBXR128.BYTE = 3; /* Three is TMR0 compare match A. */
94 IPR( PERIB, INTB128 ) = configMAX_SYSCALL_INTERRUPT_PRIORITY - 1;
95 IEN( PERIB, INTB128 ) = 1;
97 /* Ensure that the flag is set to 0, otherwise the interrupt will not be
99 IR( PERIB, INTB128 ) = 0;
101 /* Do the same for TMR2, but to vector 129. */
102 ICU.SLIBXR129.BYTE = 9; /* Nine is TMR2 compare match A. */
103 IPR( PERIB, INTB129 ) = configMAX_SYSCALL_INTERRUPT_PRIORITY - 2;
104 IEN( PERIB, INTB129 ) = 1;
105 IR( PERIB, INTB129 ) = 0;
109 /*-----------------------------------------------------------*/
111 #pragma interrupt ( Excep_PERIB_INTB128( vect = 128, enable ) )
112 void Excep_PERIB_INTB128( void )
114 portYIELD_FROM_ISR( xFirstTimerHandler() );
116 /*-----------------------------------------------------------*/
118 #pragma interrupt ( Excep_PERIB_INTB129( vect = 129, enable ) )
119 void Excep_PERIB_INTB129( void )
121 portYIELD_FROM_ISR( xSecondTimerHandler() );