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Alfred Gedeon
alfred gedeon
parent
a5dbc2b1de
commit
718178c68a
406 changed files with 108795 additions and 106323 deletions
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@ -29,28 +29,28 @@
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#include "task.h"
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/*-----------------------------------------------------------
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* Implementation of functions defined in portable.h for the MSP430 port.
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*----------------------------------------------------------*/
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* Implementation of functions defined in portable.h for the MSP430 port.
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*----------------------------------------------------------*/
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/* Constants required for hardware setup. The tick ISR runs off the ACLK,
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not the MCLK. */
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#define portACLK_FREQUENCY_HZ ( ( TickType_t ) 32768 )
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#define portINITIAL_CRITICAL_NESTING ( ( uint16_t ) 10 )
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#define portFLAGS_INT_ENABLED ( ( StackType_t ) 0x08 )
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/* Constants required for hardware setup. The tick ISR runs off the ACLK,
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* not the MCLK. */
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#define portACLK_FREQUENCY_HZ ( ( TickType_t ) 32768 )
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#define portINITIAL_CRITICAL_NESTING ( ( uint16_t ) 10 )
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#define portFLAGS_INT_ENABLED ( ( StackType_t ) 0x08 )
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/* We require the address of the pxCurrentTCB variable, but don't want to know
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any details of its type. */
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* any details of its type. */
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typedef void TCB_t;
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extern volatile TCB_t * volatile pxCurrentTCB;
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/* Each task maintains a count of the critical section nesting depth. Each
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time a critical section is entered the count is incremented. Each time a
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critical section is exited the count is decremented - with interrupts only
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being re-enabled if the count is zero.
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usCriticalNesting will get set to zero when the scheduler starts, but must
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not be initialised to zero as this will cause problems during the startup
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sequence. */
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/* Each task maintains a count of the critical section nesting depth. Each
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* time a critical section is entered the count is incremented. Each time a
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* critical section is exited the count is decremented - with interrupts only
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* being re-enabled if the count is zero.
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*
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* usCriticalNesting will get set to zero when the scheduler starts, but must
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* not be initialised to zero as this will cause problems during the startup
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* sequence. */
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volatile uint16_t usCriticalNesting = portINITIAL_CRITICAL_NESTING;
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/*-----------------------------------------------------------*/
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@ -62,110 +62,109 @@ volatile uint16_t usCriticalNesting = portINITIAL_CRITICAL_NESTING;
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void prvSetupTimerInterrupt( void );
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/*-----------------------------------------------------------*/
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/*
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* Initialise the stack of a task to look exactly as if a call to
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/*
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* Initialise the stack of a task to look exactly as if a call to
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* portSAVE_CONTEXT had been called.
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*
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*
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* See the header file portable.h.
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*/
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StackType_t *pxPortInitialiseStack( StackType_t *pxTopOfStack, TaskFunction_t pxCode, void *pvParameters )
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StackType_t * pxPortInitialiseStack( StackType_t * pxTopOfStack,
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TaskFunction_t pxCode,
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void * pvParameters )
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{
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/*
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Place a few bytes of known values on the bottom of the stack.
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This is just useful for debugging and can be included if required.
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/*
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* Place a few bytes of known values on the bottom of the stack.
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* This is just useful for debugging and can be included if required.
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*
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* pxTopOfStack = ( StackType_t ) 0x1111;
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* pxTopOfStack--;
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* pxTopOfStack = ( StackType_t ) 0x2222;
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* pxTopOfStack--;
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* pxTopOfStack = ( StackType_t ) 0x3333;
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* pxTopOfStack--;
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*/
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*pxTopOfStack = ( StackType_t ) 0x1111;
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pxTopOfStack--;
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*pxTopOfStack = ( StackType_t ) 0x2222;
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pxTopOfStack--;
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*pxTopOfStack = ( StackType_t ) 0x3333;
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pxTopOfStack--;
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*/
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/* The msp430 automatically pushes the PC then SR onto the stack before
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* executing an ISR. We want the stack to look just as if this has happened
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* so place a pointer to the start of the task on the stack first - followed
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* by the flags we want the task to use when it starts up. */
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*pxTopOfStack = ( StackType_t ) pxCode;
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pxTopOfStack--;
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*pxTopOfStack = portFLAGS_INT_ENABLED;
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pxTopOfStack--;
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/* The msp430 automatically pushes the PC then SR onto the stack before
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executing an ISR. We want the stack to look just as if this has happened
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so place a pointer to the start of the task on the stack first - followed
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by the flags we want the task to use when it starts up. */
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*pxTopOfStack = ( StackType_t ) pxCode;
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pxTopOfStack--;
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*pxTopOfStack = portFLAGS_INT_ENABLED;
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pxTopOfStack--;
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/* Next the general purpose registers. */
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*pxTopOfStack = ( StackType_t ) 0x4444;
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pxTopOfStack--;
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*pxTopOfStack = ( StackType_t ) 0x5555;
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pxTopOfStack--;
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*pxTopOfStack = ( StackType_t ) 0x6666;
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pxTopOfStack--;
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*pxTopOfStack = ( StackType_t ) 0x7777;
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pxTopOfStack--;
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*pxTopOfStack = ( StackType_t ) 0x8888;
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pxTopOfStack--;
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*pxTopOfStack = ( StackType_t ) 0x9999;
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pxTopOfStack--;
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*pxTopOfStack = ( StackType_t ) 0xaaaa;
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pxTopOfStack--;
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*pxTopOfStack = ( StackType_t ) 0xbbbb;
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pxTopOfStack--;
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*pxTopOfStack = ( StackType_t ) 0xcccc;
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pxTopOfStack--;
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*pxTopOfStack = ( StackType_t ) 0xdddd;
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pxTopOfStack--;
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*pxTopOfStack = ( StackType_t ) 0xeeee;
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pxTopOfStack--;
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/* Next the general purpose registers. */
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*pxTopOfStack = ( StackType_t ) 0x4444;
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pxTopOfStack--;
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*pxTopOfStack = ( StackType_t ) 0x5555;
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pxTopOfStack--;
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*pxTopOfStack = ( StackType_t ) 0x6666;
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pxTopOfStack--;
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*pxTopOfStack = ( StackType_t ) 0x7777;
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pxTopOfStack--;
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*pxTopOfStack = ( StackType_t ) 0x8888;
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pxTopOfStack--;
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*pxTopOfStack = ( StackType_t ) 0x9999;
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pxTopOfStack--;
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*pxTopOfStack = ( StackType_t ) 0xaaaa;
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pxTopOfStack--;
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*pxTopOfStack = ( StackType_t ) 0xbbbb;
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pxTopOfStack--;
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*pxTopOfStack = ( StackType_t ) 0xcccc;
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pxTopOfStack--;
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*pxTopOfStack = ( StackType_t ) 0xdddd;
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pxTopOfStack--;
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*pxTopOfStack = ( StackType_t ) 0xeeee;
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pxTopOfStack--;
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/* When the task starts is will expect to find the function parameter in
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* R15. */
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*pxTopOfStack = ( StackType_t ) pvParameters;
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pxTopOfStack--;
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/* When the task starts is will expect to find the function parameter in
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R15. */
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*pxTopOfStack = ( StackType_t ) pvParameters;
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pxTopOfStack--;
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/* A variable is used to keep track of the critical section nesting.
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* This variable has to be stored as part of the task context and is
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* initially set to zero. */
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*pxTopOfStack = ( StackType_t ) portNO_CRITICAL_SECTION_NESTING;
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/* A variable is used to keep track of the critical section nesting.
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This variable has to be stored as part of the task context and is
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initially set to zero. */
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*pxTopOfStack = ( StackType_t ) portNO_CRITICAL_SECTION_NESTING;
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/* Return a pointer to the top of the stack we have generated so this can
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be stored in the task control block for the task. */
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return pxTopOfStack;
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/* Return a pointer to the top of the stack we have generated so this can
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* be stored in the task control block for the task. */
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return pxTopOfStack;
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}
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/*-----------------------------------------------------------*/
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void vPortEndScheduler( void )
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{
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/* It is unlikely that the MSP430 port will get stopped. If required simply
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disable the tick interrupt here. */
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/* It is unlikely that the MSP430 port will get stopped. If required simply
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* disable the tick interrupt here. */
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}
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/*-----------------------------------------------------------*/
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/*
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* Hardware initialisation to generate the RTOS tick. This uses timer 0
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* but could alternatively use the watchdog timer or timer 1.
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* but could alternatively use the watchdog timer or timer 1.
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*/
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void prvSetupTimerInterrupt( void )
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{
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/* Ensure the timer is stopped. */
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TACTL = 0;
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/* Ensure the timer is stopped. */
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TACTL = 0;
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/* Run the timer of the ACLK. */
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TACTL = TASSEL_1;
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/* Run the timer of the ACLK. */
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TACTL = TASSEL_1;
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/* Clear everything to start with. */
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TACTL |= TACLR;
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/* Clear everything to start with. */
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TACTL |= TACLR;
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/* Set the compare match value according to the tick rate we want. */
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TACCR0 = portACLK_FREQUENCY_HZ / configTICK_RATE_HZ;
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/* Set the compare match value according to the tick rate we want. */
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TACCR0 = portACLK_FREQUENCY_HZ / configTICK_RATE_HZ;
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/* Enable the interrupts. */
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TACCTL0 = CCIE;
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/* Enable the interrupts. */
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TACCTL0 = CCIE;
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/* Start up clean. */
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TACTL |= TACLR;
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/* Start up clean. */
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TACTL |= TACLR;
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/* Up mode. */
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TACTL |= MC_1;
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/* Up mode. */
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TACTL |= MC_1;
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}
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/*-----------------------------------------------------------*/
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