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Start to adjust to support both small and large memory models in the MSP430X IAR port layer.

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This commit is contained in:
Richard Barry 2011-01-03 11:31:41 +00:00
parent 19fcd2d505
commit d195639bc1
4 changed files with 92 additions and 55 deletions
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50
Source/portable/IAR/MSP430X/port.c
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@ -98,50 +98,68 @@ void vPortSetupTimerInterrupt( void );
portSTACK_TYPE *pxPortInitialiseStack( portSTACK_TYPE *pxTopOfStack, pdTASK_CODE pxCode, void *pvParameters )
{
unsigned short *pusTopOfStack;
unsigned long *pulTopOfStack;
/*
Place a few bytes of known values on the bottom of the stack.
This is just useful for debugging and can be included if required.
*pxTopOfStack = ( portSTACK_TYPE ) 0x1111;
pxTopOfStack--;
*pxTopOfStack = ( portSTACK_TYPE ) 0x2222;
pxTopOfStack--;
*pxTopOfStack = ( portSTACK_TYPE ) 0x3333;
pxTopOfStack--;
*/
*pxTopOfStack = ( portSTACK_TYPE ) pxCode;
pusTopOfStack = ( unsigned short * ) pxTopOfStack;
/* portSTACK_TYPE is either 16 bits or 32 bits depending on the data model.
Some stacked items do not change size depending on the data model so have
to be explicitly cast to the correct size so this function will work
whichever data model is being used. */
if( sizeof( portSTACK_TYPE ) == sizeof( unsigned short ) )
{
/* Make room for a 20 bit value stored as a 32 bit value. */
pusTopOfStack = ( unsigned short * ) pxTopOfStack;
pusTopOfStack--;
pulTopOfStack = ( unsigned long * ) pusTopOfStack;
}
else
{
pulTopOfStack = ( unsigned long * ) pxTopOfStack;
}
*pulTopOfStack = ( unsigned long ) pxCode;
pusTopOfStack = ( unsigned short * ) pulTopOfStack;
pusTopOfStack--;
*pusTopOfStack = portFLAGS_INT_ENABLED;
pusTopOfStack -= 2;
pusTopOfStack -= ( sizeof( portSTACK_TYPE ) / 2 );
/* From here on the size of stacked items depends on the memory model. */
pxTopOfStack = ( portSTACK_TYPE * ) pusTopOfStack;
/* Next the general purpose registers. */
*pxTopOfStack = ( portSTACK_TYPE ) 0xffffff;
*pxTopOfStack = ( portSTACK_TYPE ) 0xfffff;
pxTopOfStack--;
*pxTopOfStack = ( portSTACK_TYPE ) 0xeeeeee;
*pxTopOfStack = ( portSTACK_TYPE ) 0xeeeee;
pxTopOfStack--;
*pxTopOfStack = ( portSTACK_TYPE ) 0xdddddd;
*pxTopOfStack = ( portSTACK_TYPE ) 0xddddd;
pxTopOfStack--;
*pxTopOfStack = ( portSTACK_TYPE ) pvParameters;
pxTopOfStack--;
*pxTopOfStack = ( portSTACK_TYPE ) 0xbbbbbb;
*pxTopOfStack = ( portSTACK_TYPE ) 0xbbbbb;
pxTopOfStack--;
*pxTopOfStack = ( portSTACK_TYPE ) 0xaaaaaa;
*pxTopOfStack = ( portSTACK_TYPE ) 0xaaaaa;
pxTopOfStack--;
*pxTopOfStack = ( portSTACK_TYPE ) 0x999999;
*pxTopOfStack = ( portSTACK_TYPE ) 0x99999;
pxTopOfStack--;
*pxTopOfStack = ( portSTACK_TYPE ) 0x888888;
*pxTopOfStack = ( portSTACK_TYPE ) 0x88888;
pxTopOfStack--;
*pxTopOfStack = ( portSTACK_TYPE ) 0x555555;
*pxTopOfStack = ( portSTACK_TYPE ) 0x55555;
pxTopOfStack--;
*pxTopOfStack = ( portSTACK_TYPE ) 0x666666;
*pxTopOfStack = ( portSTACK_TYPE ) 0x66666;
pxTopOfStack--;
*pxTopOfStack = ( portSTACK_TYPE ) 0x555555;
*pxTopOfStack = ( portSTACK_TYPE ) 0x55555;
pxTopOfStack--;
*pxTopOfStack = ( portSTACK_TYPE ) 0x444444;
*pxTopOfStack = ( portSTACK_TYPE ) 0x44444;
pxTopOfStack--;
/* A variable is used to keep track of the critical section nesting.