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29 * This file contains the non-portable and therefore RX64M specific parts of
30 * the IntQueue standard demo task - namely the configuration of the timers
31 * that generate the interrupts and the interrupt entry points.
34 /* Scheduler includes. */
39 #include "IntQueueTimer.h"
42 /* Hardware specifics. */
44 #include "rskrx64mdef.h"
46 #define IPR_PERIB_INTB128 128
47 #define IPR_PERIB_INTB129 129
48 #define IER_PERIB_INTB128 0x10
49 #define IER_PERIB_INTB129 0x10
50 #define IEN_PERIB_INTB128 IEN0
51 #define IEN_PERIB_INTB129 IEN1
52 #define IR_PERIB_INTB128 128
53 #define IR_PERIB_INTB129 129
55 void vIntQTimerISR0( void ) __attribute__ ((interrupt));
56 void vIntQTimerISR1( void ) __attribute__ ((interrupt));
58 #define tmrTIMER_0_1_FREQUENCY ( 2000UL )
59 #define tmrTIMER_2_3_FREQUENCY ( 2001UL )
61 void vInitialiseTimerForIntQueueTest( void )
63 /* Ensure interrupts do not start until full configuration is complete. */
66 /* Give write access. */
67 SYSTEM.PRCR.WORD = 0xa502;
69 /* Cascade two 8bit timer channels to generate the interrupts.
70 8bit timer unit 1 (TMR0 and TMR1) and 8bit timer unit 2 (TMR2 and TMR3 are
71 utilised for this test. */
73 /* Enable the timers. */
74 SYSTEM.MSTPCRA.BIT.MSTPA5 = 0;
75 SYSTEM.MSTPCRA.BIT.MSTPA4 = 0;
77 /* Enable compare match A interrupt request. */
78 TMR0.TCR.BIT.CMIEA = 1;
79 TMR2.TCR.BIT.CMIEA = 1;
81 /* Clear the timer on compare match A. */
82 TMR0.TCR.BIT.CCLR = 1;
83 TMR2.TCR.BIT.CCLR = 1;
85 /* Set the compare match value. */
86 TMR01.TCORA = ( unsigned short ) ( ( ( configPERIPHERAL_CLOCK_HZ / tmrTIMER_0_1_FREQUENCY ) -1 ) / 8 );
87 TMR23.TCORA = ( unsigned short ) ( ( ( configPERIPHERAL_CLOCK_HZ / tmrTIMER_0_1_FREQUENCY ) -1 ) / 8 );
89 /* 16 bit operation ( count from timer 1,2 ). */
90 TMR0.TCCR.BIT.CSS = 3;
91 TMR2.TCCR.BIT.CSS = 3;
93 /* Use PCLK as the input. */
94 TMR1.TCCR.BIT.CSS = 1;
95 TMR3.TCCR.BIT.CSS = 1;
97 /* Divide PCLK by 8. */
98 TMR1.TCCR.BIT.CKS = 2;
99 TMR3.TCCR.BIT.CKS = 2;
101 /* Enable TMR 0, 2 interrupts. */
102 TMR0.TCR.BIT.CMIEA = 1;
103 TMR2.TCR.BIT.CMIEA = 1;
105 /* Map TMR0 CMIA0 interrupt to vector slot B number 128 and set
106 priority above the kernel's priority, but below the max syscall
108 ICU.SLIBXR128.BYTE = 3; /* Three is TMR0 compare match A. */
109 IPR( PERIB, INTB128 ) = configMAX_SYSCALL_INTERRUPT_PRIORITY - 1;
110 IEN( PERIB, INTB128 ) = 1;
112 /* Ensure that the flag is set to 0, otherwise the interrupt will not be
114 IR( PERIB, INTB128 ) = 0;
116 /* Do the same for TMR2, but to vector 129. */
117 ICU.SLIBXR129.BYTE = 9; /* Nine is TMR2 compare match A. */
118 IPR( PERIB, INTB129 ) = configMAX_SYSCALL_INTERRUPT_PRIORITY - 2;
119 IEN( PERIB, INTB129 ) = 1;
120 IR( PERIB, INTB129 ) = 0;
124 /*-----------------------------------------------------------*/
127 void vIntQTimerISR0( void )
129 /* Enable interrupts to allow interrupt nesting. */
130 __asm volatile( "setpsw i" );
132 portYIELD_FROM_ISR( xFirstTimerHandler() );
134 /*-----------------------------------------------------------*/
137 void vIntQTimerISR1( void )
139 /* Enable interrupts to allow interrupt nesting. */
140 __asm volatile( "setpsw i" );
142 portYIELD_FROM_ISR( xSecondTimerHandler() );