2 * FreeRTOS Kernel V10.0.1
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29 * This file contains the non-portable and therefore RX62N 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. */
45 #define tmrTIMER_0_1_FREQUENCY ( 2000UL )
46 #define tmrTIMER_2_3_FREQUENCY ( 2001UL )
48 void vInitialiseTimerForIntQueueTest( void )
50 /* Ensure interrupts do not start until full configuration is complete. */
53 /* Cascade two 8bit timer channels to generate the interrupts.
54 8bit timer unit 1 (TMR0 and TMR1) and 8bit timer unit 2 (TMR2 and TMR3 are
55 utilised for this test. */
57 /* Enable the timers. */
58 SYSTEM.MSTPCRA.BIT.MSTPA5 = 0;
59 SYSTEM.MSTPCRA.BIT.MSTPA4 = 0;
61 /* Enable compare match A interrupt request. */
62 TMR0.TCR.BIT.CMIEA = 1;
63 TMR2.TCR.BIT.CMIEA = 1;
65 /* Clear the timer on compare match A. */
66 TMR0.TCR.BIT.CCLR = 1;
67 TMR2.TCR.BIT.CCLR = 1;
69 /* Set the compare match value. */
70 TMR01.TCORA = ( unsigned short ) ( ( ( configPERIPHERAL_CLOCK_HZ / tmrTIMER_0_1_FREQUENCY ) -1 ) / 8 );
71 TMR23.TCORA = ( unsigned short ) ( ( ( configPERIPHERAL_CLOCK_HZ / tmrTIMER_0_1_FREQUENCY ) -1 ) / 8 );
73 /* 16 bit operation ( count from timer 1,2 ). */
74 TMR0.TCCR.BIT.CSS = 3;
75 TMR2.TCCR.BIT.CSS = 3;
77 /* Use PCLK as the input. */
78 TMR1.TCCR.BIT.CSS = 1;
79 TMR3.TCCR.BIT.CSS = 1;
81 /* Divide PCLK by 8. */
82 TMR1.TCCR.BIT.CKS = 2;
83 TMR3.TCCR.BIT.CKS = 2;
85 /* Enable TMR 0, 2 interrupts. */
86 IEN( TMR0, CMIA0 ) = 1;
87 IEN( TMR2, CMIA2 ) = 1;
89 /* Set the timer interrupts to be above the kernel. The interrupts are
90 assigned different priorities so they nest with each other. */
91 IPR( TMR0, CMIA0 ) = configMAX_SYSCALL_INTERRUPT_PRIORITY - 1;
92 IPR( TMR2, CMIA2 ) = ( configMAX_SYSCALL_INTERRUPT_PRIORITY - 2 );
96 /* Ensure the interrupts are clear as they are edge detected. */
97 IR( TMR0, CMIA0 ) = 0;
98 IR( TMR2, CMIA2 ) = 0;
100 /*-----------------------------------------------------------*/
102 #pragma interrupt ( vT0_1InterruptHandler( vect = VECT_TMR0_CMIA0, enable ) )
103 void vT0_1InterruptHandler( void )
105 portYIELD_FROM_ISR( xFirstTimerHandler() );
107 /*-----------------------------------------------------------*/
109 #pragma interrupt ( vT2_3InterruptHandler( vect = VECT_TMR2_CMIA2, enable ) )
110 void vT2_3InterruptHandler( void )
112 portYIELD_FROM_ISR( xSecondTimerHandler() );