mirror of
https://github.com/FreeRTOS/FreeRTOS-Kernel.git
synced 2025-08-20 01:58:32 -04:00
Soren Ptak
GitHub
parent
bcf7bdaa13
commit
ac7fc396a0
6 changed files with 225 additions and 241 deletions
|
|
@ -27,22 +27,22 @@
|
|||
*/
|
||||
|
||||
/*
|
||||
* Changes from V1.00:
|
||||
*
|
||||
+ Call to taskYIELD() from within tick ISR has been replaced by the more
|
||||
+ efficient portSWITCH_CONTEXT().
|
||||
+ ISR function definitions renamed to include the prv prefix.
|
||||
+
|
||||
+ Changes from V2.6.1
|
||||
+
|
||||
+ Replaced the sUsingPreemption variable with the configUSE_PREEMPTION
|
||||
+ macro to be consistent with the later ports.
|
||||
*/
|
||||
Changes from V1.00:
|
||||
|
||||
+ Call to taskYIELD() from within tick ISR has been replaced by the more
|
||||
efficient portSWITCH_CONTEXT().
|
||||
+ ISR function definitions renamed to include the prv prefix.
|
||||
|
||||
Changes from V2.6.1
|
||||
|
||||
+ Replaced the sUsingPreemption variable with the configUSE_PREEMPTION
|
||||
macro to be consistent with the later ports.
|
||||
*/
|
||||
|
||||
/*-----------------------------------------------------------
|
||||
* Implementation of functions defined in portable.h for the Flashlite 186
|
||||
* port.
|
||||
*----------------------------------------------------------*/
|
||||
* Implementation of functions defined in portable.h for the Flashlite 186
|
||||
* port.
|
||||
*----------------------------------------------------------*/
|
||||
|
||||
#include <dos.h>
|
||||
#include <stdlib.h>
|
||||
|
|
@ -54,9 +54,9 @@
|
|||
|
||||
/*lint -e950 Non ANSI reserved words okay in this file only. */
|
||||
|
||||
#define portTIMER_EOI_TYPE ( 8 )
|
||||
#define portRESET_PIC() portOUTPUT_WORD( ( uint16_t ) 0xff22, portTIMER_EOI_TYPE )
|
||||
#define portTIMER_INT_NUMBER 0x12
|
||||
#define portTIMER_EOI_TYPE ( 8 )
|
||||
#define portRESET_PIC() portOUTPUT_WORD( ( uint16_t ) 0xff22, portTIMER_EOI_TYPE )
|
||||
#define portTIMER_INT_NUMBER 0x12
|
||||
|
||||
#define portTIMER_1_CONTROL_REGISTER ( ( uint16_t ) 0xff5e )
|
||||
#define portTIMER_0_CONTROL_REGISTER ( ( uint16_t ) 0xff56 )
|
||||
|
|
@ -69,16 +69,14 @@ static void prvSetTickFrequency( uint32_t ulTickRateHz );
|
|||
static void prvExitFunction( 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
|
||||
|
||||
|
|
@ -91,9 +89,9 @@ static void __interrupt __far prvYieldProcessor( void );
|
|||
static BaseType_t xSchedulerRunning = pdFALSE;
|
||||
|
||||
/* Points to the original routine installed on the vector we use for manual
|
||||
* context switches. This is then used to restore the original routine during
|
||||
* prvExitFunction(). */
|
||||
static void( __interrupt __far * pxOldSwitchISR )();
|
||||
context switches. This is then used to restore the original routine during
|
||||
prvExitFunction(). */
|
||||
static void ( __interrupt __far *pxOldSwitchISR )();
|
||||
|
||||
/* Used to restore the original DOS context when the scheduler is ended. */
|
||||
static jmp_buf xJumpBuf;
|
||||
|
|
@ -106,14 +104,14 @@ BaseType_t xPortStartScheduler( void )
|
|||
/* This is called with interrupts already disabled. */
|
||||
|
||||
/* Remember what was on the interrupts we are going to use
|
||||
* so we can put them back later if required. */
|
||||
so we can put them back later if required. */
|
||||
pxOldSwitchISR = _dos_getvect( portSWITCH_INT_NUMBER );
|
||||
|
||||
/* Put our manual switch (yield) function on a known
|
||||
* vector. */
|
||||
vector. */
|
||||
_dos_setvect( portSWITCH_INT_NUMBER, prvYieldProcessor );
|
||||
|
||||
#if ( configUSE_PREEMPTION == 1 )
|
||||
#if( configUSE_PREEMPTION == 1 )
|
||||
{
|
||||
/* Put our tick switch function on the timer interrupt. */
|
||||
_dos_setvect( portTIMER_INT_NUMBER, prvPreemptiveTick );
|
||||
|
|
@ -146,8 +144,8 @@ BaseType_t xPortStartScheduler( void )
|
|||
/*-----------------------------------------------------------*/
|
||||
|
||||
/* 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. */
|
||||
|
|
@ -160,15 +158,15 @@ BaseType_t xPortStartScheduler( void )
|
|||
/* Reset the PIC ready for the next time. */
|
||||
portRESET_PIC();
|
||||
}
|
||||
#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();
|
||||
portRESET_PIC();
|
||||
}
|
||||
#endif /* if ( configUSE_PREEMPTION == 1 ) */
|
||||
#endif
|
||||
/*-----------------------------------------------------------*/
|
||||
|
||||
static void __interrupt __far prvYieldProcessor( void )
|
||||
|
|
@ -181,31 +179,30 @@ static void __interrupt __far prvYieldProcessor( void )
|
|||
void vPortEndScheduler( void )
|
||||
{
|
||||
/* Jump back to the processor state prior to starting the
|
||||
* scheduler. This means we are not going to be using a
|
||||
* task stack frame so the task can be deleted. */
|
||||
scheduler. This means we are not going to be using a
|
||||
task stack frame so the task can be deleted. */
|
||||
longjmp( xJumpBuf, 1 );
|
||||
}
|
||||
/*-----------------------------------------------------------*/
|
||||
|
||||
static void prvExitFunction( void )
|
||||
{
|
||||
const uint16_t usTimerDisable = 0x0000;
|
||||
uint16_t usTimer0Control;
|
||||
const uint16_t usTimerDisable = 0x0000;
|
||||
uint16_t usTimer0Control;
|
||||
|
||||
/* Interrupts should be disabled here anyway - but no
|
||||
* harm in making sure. */
|
||||
harm in making sure. */
|
||||
portDISABLE_INTERRUPTS();
|
||||
|
||||
if( xSchedulerRunning == pdTRUE )
|
||||
{
|
||||
/* Put back the switch interrupt routines that was in place
|
||||
* before the scheduler started. */
|
||||
before the scheduler started. */
|
||||
_dos_setvect( portSWITCH_INT_NUMBER, pxOldSwitchISR );
|
||||
}
|
||||
|
||||
/* Disable the timer used for the tick to ensure the scheduler is
|
||||
* not called before restoring interrupts. There was previously nothing
|
||||
* on this timer so there is no old ISR to restore. */
|
||||
not called before restoring interrupts. There was previously nothing
|
||||
on this timer so there is no old ISR to restore. */
|
||||
portOUTPUT_WORD( portTIMER_1_CONTROL_REGISTER, usTimerDisable );
|
||||
|
||||
/* Restart the DOS tick. */
|
||||
|
|
@ -220,18 +217,18 @@ static void prvExitFunction( void )
|
|||
|
||||
static void prvSetTickFrequency( uint32_t ulTickRateHz )
|
||||
{
|
||||
const uint16_t usMaxCountRegister = 0xff5a;
|
||||
const uint16_t usTimerPriorityRegister = 0xff32;
|
||||
const uint16_t usTimerEnable = 0xC000;
|
||||
const uint16_t usRetrigger = 0x0001;
|
||||
const uint16_t usTimerHighPriority = 0x0000;
|
||||
uint16_t usTimer0Control;
|
||||
const uint16_t usMaxCountRegister = 0xff5a;
|
||||
const uint16_t usTimerPriorityRegister = 0xff32;
|
||||
const uint16_t usTimerEnable = 0xC000;
|
||||
const uint16_t usRetrigger = 0x0001;
|
||||
const uint16_t usTimerHighPriority = 0x0000;
|
||||
uint16_t usTimer0Control;
|
||||
|
||||
/* ( CPU frequency / 4 ) / clock 2 max count [inpw( 0xff62 ) = 7] */
|
||||
|
||||
const uint32_t ulClockFrequency = ( uint32_t ) 0x7f31a0UL;
|
||||
const uint32_t ulClockFrequency = ( uint32_t ) 0x7f31a0UL;
|
||||
|
||||
uint32_t ulTimerCount = ulClockFrequency / ulTickRateHz;
|
||||
uint32_t ulTimerCount = ulClockFrequency / ulTickRateHz;
|
||||
|
||||
portOUTPUT_WORD( portTIMER_1_CONTROL_REGISTER, usTimerEnable | portTIMER_INTERRUPT_ENABLE | usRetrigger );
|
||||
portOUTPUT_WORD( usMaxCountRegister, ( uint16_t ) ulTimerCount );
|
||||
|
|
|
|||
|
|
@ -40,61 +40,60 @@
|
|||
*/
|
||||
|
||||
/* Type definitions. */
|
||||
#define portCHAR char
|
||||
#define portFLOAT float
|
||||
#define portDOUBLE long
|
||||
#define portLONG long
|
||||
#define portSHORT int
|
||||
#define portSTACK_TYPE uint16_t
|
||||
#define portBASE_TYPE portSHORT
|
||||
#define portCHAR char
|
||||
#define portFLOAT float
|
||||
#define portDOUBLE long
|
||||
#define portLONG long
|
||||
#define portSHORT int
|
||||
#define portSTACK_TYPE uint16_t
|
||||
#define portBASE_TYPE portSHORT
|
||||
|
||||
typedef portSTACK_TYPE StackType_t;
|
||||
typedef short BaseType_t;
|
||||
typedef unsigned short UBaseType_t;
|
||||
typedef portSTACK_TYPE StackType_t;
|
||||
typedef short BaseType_t;
|
||||
typedef unsigned short UBaseType_t;
|
||||
|
||||
#if ( configTICK_TYPE_WIDTH_IN_BITS == TICK_TYPE_WIDTH_16_BITS )
|
||||
typedef uint16_t TickType_t;
|
||||
#define portMAX_DELAY ( TickType_t ) 0xffff
|
||||
#if( configTICK_TYPE_WIDTH_IN_BITS == TICK_TYPE_WIDTH_16_BITS )
|
||||
typedef uint16_t TickType_t;
|
||||
#define portMAX_DELAY ( TickType_t ) 0xffff
|
||||
#elif ( configTICK_TYPE_WIDTH_IN_BITS == TICK_TYPE_WIDTH_32_BITS )
|
||||
typedef uint32_t TickType_t;
|
||||
#define portMAX_DELAY ( TickType_t ) 0xffffffffUL
|
||||
typedef uint32_t TickType_t;
|
||||
#define portMAX_DELAY ( TickType_t ) 0xffffffffUL
|
||||
#else
|
||||
#error configTICK_TYPE_WIDTH_IN_BITS set to unsupported tick type width.
|
||||
#endif
|
||||
/*-----------------------------------------------------------*/
|
||||
|
||||
/* Critical section handling. */
|
||||
#define portENTER_CRITICAL() \
|
||||
__asm { pushf } \
|
||||
__asm { cli } \
|
||||
#define portENTER_CRITICAL() __asm{ pushf } \
|
||||
__asm{ cli } \
|
||||
|
||||
#define portEXIT_CRITICAL() __asm { popf }
|
||||
#define portEXIT_CRITICAL() __asm{ popf }
|
||||
|
||||
#define portDISABLE_INTERRUPTS() __asm { cli }
|
||||
#define portDISABLE_INTERRUPTS() __asm{ cli }
|
||||
|
||||
#define portENABLE_INTERRUPTS() __asm { sti }
|
||||
#define portENABLE_INTERRUPTS() __asm{ sti }
|
||||
/*-----------------------------------------------------------*/
|
||||
|
||||
/* Hardware specifics. */
|
||||
#define portNOP() __asm { nop }
|
||||
#define portSTACK_GROWTH ( -1 )
|
||||
#define portSWITCH_INT_NUMBER 0x80
|
||||
#define portYIELD() __asm { int portSWITCH_INT_NUMBER }
|
||||
#define portTICK_PERIOD_MS ( ( TickType_t ) 1000 / configTICK_RATE_HZ )
|
||||
#define portBYTE_ALIGNMENT 2
|
||||
#define portINITIAL_SW ( ( portSTACK_TYPE ) 0x0202 ) /* Start the tasks with interrupts enabled. */
|
||||
#define portNOP() __asm{ nop }
|
||||
#define portSTACK_GROWTH ( -1 )
|
||||
#define portSWITCH_INT_NUMBER 0x80
|
||||
#define portYIELD() __asm{ int portSWITCH_INT_NUMBER }
|
||||
#define portTICK_PERIOD_MS ( ( TickType_t ) 1000 / configTICK_RATE_HZ )
|
||||
#define portBYTE_ALIGNMENT 2
|
||||
#define portINITIAL_SW ( ( portSTACK_TYPE ) 0x0202 ) /* Start the tasks with interrupts enabled. */
|
||||
/*-----------------------------------------------------------*/
|
||||
|
||||
/* Compiler specifics. */
|
||||
#define portINPUT_BYTE( xAddr ) inp( xAddr )
|
||||
#define portOUTPUT_BYTE( xAddr, ucValue ) outp( xAddr, ucValue )
|
||||
#define portINPUT_WORD( xAddr ) inpw( xAddr )
|
||||
#define portOUTPUT_WORD( xAddr, usValue ) outpw( xAddr, usValue )
|
||||
#define portINPUT_BYTE( xAddr ) inp( xAddr )
|
||||
#define portOUTPUT_BYTE( xAddr, ucValue ) outp( xAddr, ucValue )
|
||||
#define portINPUT_WORD( xAddr ) inpw( xAddr )
|
||||
#define portOUTPUT_WORD( xAddr, usValue ) outpw( xAddr, usValue )
|
||||
|
||||
/*-----------------------------------------------------------*/
|
||||
|
||||
/* Task function macros as described on the FreeRTOS.org WEB site. */
|
||||
#define portTASK_FUNCTION_PROTO( vTaskFunction, vParameters ) void vTaskFunction( void * pvParameters )
|
||||
#define portTASK_FUNCTION( vTaskFunction, vParameters ) void vTaskFunction( void * pvParameters )
|
||||
#define portTASK_FUNCTION_PROTO( vTaskFunction, vParameters ) void vTaskFunction( void *pvParameters )
|
||||
#define portTASK_FUNCTION( vTaskFunction, vParameters ) void vTaskFunction( void *pvParameters )
|
||||
|
||||
#endif /* PORTMACRO_H */
|
||||
|
|
|
|||
Loading…
Add table
Add a link
Reference in a new issue