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Continue development of MSP430X port.

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This commit is contained in:
Richard Barry 2010-12-29 14:35:40 +00:00
parent e7e623f853
commit 0a31276719
3 changed files with 38 additions and 25 deletions
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26
Source/portable/IAR/MSP430X/port.c
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@ -98,8 +98,8 @@ void vPortSetupTimerInterrupt( void );
portSTACK_TYPE *pxPortInitialiseStack( portSTACK_TYPE *pxTopOfStack, pdTASK_CODE pxCode, void *pvParameters )
{
unsigned short usNibble;
unsigned short *pus16BitPointer;
unsigned long ulSP_PC_Combined;
unsigned short *pusTopOfStack;
/*
Place a few bytes of known values on the bottom of the stack.
@ -117,17 +117,11 @@ unsigned long ulSP_PC_Combined;
executing an ISR. We want the stack to look just as if this has happened
so place a pointer to the start of the task on the stack first - followed
by the flags we want the task to use when it starts up. */
// pus16BitPointer = ( unsigned short * ) pxTopOfStack;
// *pus16BitPointer = ( unsigned short ) pxCode;
// pus16BitPointer--;
/* When placed on the stack, the top four bits of the status register
contain bits 19:16 of the 20 bit return address (pxCode). */
#ifdef GENERATE_ISR_STACK_FRAME
usNibble = ( unsigned short ) ( ( ( unsigned long ) pxCode >> 15UL ) & 0x0fUL );
// *pus16BitPointer = ( usNibble | portFLAGS_INT_ENABLED );
// pus16BitPointer--;
// pxTopOfStack = ( portSTACK_TYPE * ) pus16BitPointer;
ulSP_PC_Combined = ( unsigned long ) pxCode;
ulSP_PC_Combined <<= 16;
@ -135,7 +129,14 @@ unsigned long ulSP_PC_Combined;
ulSP_PC_Combined |= portFLAGS_INT_ENABLED;
*pxTopOfStack = ulSP_PC_Combined;
pxTopOfStack--;
#else
*pxTopOfStack = ( portSTACK_TYPE ) pxCode;
pusTopOfStack = ( unsigned short * ) pxTopOfStack;
pusTopOfStack--;
*pusTopOfStack = portFLAGS_INT_ENABLED;
pusTopOfStack -= 2;
pxTopOfStack = ( portSTACK_TYPE * ) pusTopOfStack;
#endif
/* Next the general purpose registers. */
*pxTopOfStack = ( portSTACK_TYPE ) 0xffffff;
pxTopOfStack--;
@ -193,5 +194,12 @@ void vPortSetupTimerInterrupt( void )
}
/*-----------------------------------------------------------*/
#pragma vector=configTICK_INTERRUPT_VECTOR
__interrupt void vISR( void )
{
extern void vTickISR( void );
vTickISR();
}