diff options
Diffstat (limited to 'portable/Paradigm/Tern_EE/large_untested/port.c')
| -rw-r--r-- | portable/Paradigm/Tern_EE/large_untested/port.c | 84 |
1 files changed, 38 insertions, 46 deletions
diff --git a/portable/Paradigm/Tern_EE/large_untested/port.c b/portable/Paradigm/Tern_EE/large_untested/port.c index fdb275f2b..4ecffe01a 100644 --- a/portable/Paradigm/Tern_EE/large_untested/port.c +++ b/portable/Paradigm/Tern_EE/large_untested/port.c @@ -28,9 +28,9 @@ /*----------------------------------------------------------- -* Implementation of functions defined in portable.h for the Tern EE 186 -* port. -*----------------------------------------------------------*/ + * Implementation of functions defined in portable.h for the Tern EE 186 + * port. + *----------------------------------------------------------*/ /* Library includes. */ #include <embedded.h> @@ -42,29 +42,27 @@ #include "portasm.h" /* The timer increments every four clocks, hence the divide by 4. */ -#define portTIMER_COMPARE ( uint16_t ) ( ( configCPU_CLOCK_HZ / configTICK_RATE_HZ ) / ( uint32_t ) 4 ) +#define portTIMER_COMPARE ( uint16_t ) ( ( configCPU_CLOCK_HZ / configTICK_RATE_HZ ) / ( uint32_t ) 4 ) /* From the RDC data sheet. */ -#define portENABLE_TIMER_AND_INTERRUPT ( uint16_t ) 0xe001 +#define portENABLE_TIMER_AND_INTERRUPT ( uint16_t ) 0xe001 /* Interrupt control. */ -#define portEIO_REGISTER 0xff22 -#define portCLEAR_INTERRUPT 0x0008 +#define portEIO_REGISTER 0xff22 +#define portCLEAR_INTERRUPT 0x0008 /* Setup the hardware to generate the required tick frequency. */ static void prvSetupTimerInterrupt( void ); /* The ISR used depends on whether the preemptive or cooperative scheduler - * is being used. */ -#if ( configUSE_PREEMPTION == 1 ) - -/* Tick service routine used by the scheduler when preemptive scheduling is - * being used. */ +is being used. */ +#if( configUSE_PREEMPTION == 1 ) + /* Tick service routine used by the scheduler when preemptive scheduling is + being used. */ static void __interrupt __far prvPreemptiveTick( void ); #else - -/* Tick service routine used by the scheduler when cooperative scheduling is - * being used. */ + /* Tick service routine used by the scheduler when cooperative scheduling is + being used. */ static void __interrupt __far prvNonPreemptiveTick( void ); #endif @@ -72,20 +70,18 @@ static void prvSetupTimerInterrupt( void ); static void __interrupt __far prvYieldProcessor( void ); /* The timer initialisation functions leave interrupts enabled, - * which is not what we want. This ISR is installed temporarily in case - * the timer fires before we get a change to disable interrupts again. */ +which is not what we want. This ISR is installed temporarily in case +the timer fires before we get a change to disable interrupts again. */ static void __interrupt __far prvDummyISR( void ); /*-----------------------------------------------------------*/ /* See header file for description. */ -StackType_t * pxPortInitialiseStack( StackType_t * pxTopOfStack, - TaskFunction_t pxCode, - void * pvParameters ) +StackType_t *pxPortInitialiseStack( StackType_t *pxTopOfStack, TaskFunction_t pxCode, void *pvParameters ) { - StackType_t DS_Reg = 0; +StackType_t DS_Reg = 0; /* Place a few bytes of known values on the bottom of the stack. - * This is just useful for debugging. */ + This is just useful for debugging. */ *pxTopOfStack = 0x1111; pxTopOfStack--; @@ -95,8 +91,8 @@ StackType_t * pxPortInitialiseStack( StackType_t * pxTopOfStack, pxTopOfStack--; /* We are going to start the scheduler using a return from interrupt - * instruction to load the program counter, so first there would be the - * function call with parameters preamble. */ + instruction to load the program counter, so first there would be the + function call with parameters preamble. */ *pxTopOfStack = FP_SEG( pvParameters ); pxTopOfStack--; @@ -116,8 +112,8 @@ StackType_t * pxPortInitialiseStack( StackType_t * pxTopOfStack, pxTopOfStack--; /* The remaining registers would be pushed on the stack by our context - * switch function. These are loaded with values simply to make debugging - * easier. */ + switch function. These are loaded with values simply to make debugging + easier. */ *pxTopOfStack = ( StackType_t ) 0xAAAA; /* AX */ pxTopOfStack--; *pxTopOfStack = ( StackType_t ) 0xBBBB; /* BX */ @@ -130,11 +126,9 @@ StackType_t * pxPortInitialiseStack( StackType_t * pxTopOfStack, pxTopOfStack--; /* We need the true data segment. */ - __asm { - MOV DS_Reg, DS - }; + __asm{ MOV DS_Reg, DS }; - *pxTopOfStack = DS_Reg; /* DS */ + *pxTopOfStack = DS_Reg; /* DS */ pxTopOfStack--; *pxTopOfStack = ( StackType_t ) 0x0123; /* SI */ pxTopOfStack--; @@ -151,7 +145,7 @@ BaseType_t xPortStartScheduler( void ) /* This is called with interrupts already disabled. */ /* Put our manual switch (yield) function on a known - * vector. */ + vector. */ setvect( portSWITCH_INT_NUMBER, prvYieldProcessor ); /* Setup the tick interrupt. */ @@ -168,15 +162,15 @@ BaseType_t xPortStartScheduler( void ) static void __interrupt __far prvDummyISR( void ) { /* The timer initialisation functions leave interrupts enabled, - * which is not what we want. This ISR is installed temporarily in case - * the timer fires before we get a change to disable interrupts again. */ + which is not what we want. This ISR is installed temporarily in case + the timer fires before we get a change to disable interrupts again. */ outport( portEIO_REGISTER, portCLEAR_INTERRUPT ); } /*-----------------------------------------------------------*/ /* The ISR used depends on whether the preemptive or cooperative scheduler - * is being used. */ -#if ( configUSE_PREEMPTION == 1 ) +is being used. */ +#if( configUSE_PREEMPTION == 1 ) static void __interrupt __far prvPreemptiveTick( void ) { /* Get the scheduler to update the task states following the tick. */ @@ -189,17 +183,17 @@ static void __interrupt __far prvDummyISR( void ) /* Reset interrupt. */ outport( portEIO_REGISTER, portCLEAR_INTERRUPT ); } -#else /* if ( configUSE_PREEMPTION == 1 ) */ +#else static void __interrupt __far prvNonPreemptiveTick( void ) { /* Same as preemptive tick, but the cooperative scheduler is being used - * so we don't have to switch in the context of the next task. */ + so we don't have to switch in the context of the next task. */ xTaskIncrementTick(); /* Reset interrupt. */ outport( portEIO_REGISTER, portCLEAR_INTERRUPT ); } -#endif /* if ( configUSE_PREEMPTION == 1 ) */ +#endif /*-----------------------------------------------------------*/ static void __interrupt __far prvYieldProcessor( void ) @@ -217,25 +211,23 @@ void vPortEndScheduler( void ) static void prvSetupTimerInterrupt( void ) { - const uint16_t usTimerACompare = portTIMER_COMPARE, usTimerAMode = portENABLE_TIMER_AND_INTERRUPT; - const uint16_t usT2_IRQ = 0x13; +const uint16_t usTimerACompare = portTIMER_COMPARE, usTimerAMode = portENABLE_TIMER_AND_INTERRUPT; +const uint16_t usT2_IRQ = 0x13; /* Configure the timer, the dummy handler is used here as the init - * function leaves interrupts enabled. */ + function leaves interrupts enabled. */ t2_init( usTimerAMode, usTimerACompare, prvDummyISR ); /* Disable interrupts again before installing the real handlers. */ portDISABLE_INTERRUPTS(); - #if ( configUSE_PREEMPTION == 1 ) - + #if( configUSE_PREEMPTION == 1 ) /* Tick service routine used by the scheduler when preemptive scheduling is - * being used. */ + being used. */ setvect( usT2_IRQ, prvPreemptiveTick ); #else - /* Tick service routine used by the scheduler when cooperative scheduling is - * being used. */ + being used. */ setvect( usT2_IRQ, prvNonPreemptiveTick ); #endif } |