这里STK--=……是什么意思，具体都给我解释一下 谢谢大虾们了

Question

OS_STK *OSTaskStkInit (void (*task)(void *pd), void *pdata, OS_STK *ptos, INT16U opt)
{
INT16U *stk;

opt = opt; /* 'opt' is not used, prevent warning */
stk = (INT16U *)ptos; /* Load stack pointer */
*stk-- = (INT16U)FP_SEG(pdata); /* Simulate call to function with argument */
*stk-- = (INT16U)FP_OFF(pdata);  
*stk-- = (INT16U)FP_SEG(task);
*stk-- = (INT16U)FP_OFF(task);
*stk-- = (INT16U)0x0202; /* SW = Interrupts enabled */
*stk-- = (INT16U)FP_SEG(task); /* Put pointer to task on top of stack */
*stk-- = (INT16U)FP_OFF(task);
*stk-- = (INT16U)0xAAAA; /* AX = 0xAAAA */
*stk-- = (INT16U)0xCCCC; /* CX = 0xCCCC */
*stk-- = (INT16U)0xDDDD; /* DX = 0xDDDD */
*stk-- = (INT16U)0xBBBB; /* BX = 0xBBBB */
*stk-- = (INT16U)0x0000; /* SP = 0x0000 */
*stk-- = (INT16U)0x1111; /* BP = 0x1111 */
*stk-- = (INT16U)0x2222; /* SI = 0x2222 */
*stk-- = (INT16U)0x3333; /* DI = 0x3333 */
*stk-- = (INT16U)0x4444; /* ES = 0x4444 */
*stk = _DS; /* DS = Current value of DS */
return ((OS_STK *)stk);
}
还有就是例如*stk-- = (INT16U)0xAAAA; 后面的oxAAAA，0XCCCC，等定义的都是什么啊

Answer 1

应该问*stk--=.......是什么。如果写成*（stk--）=....是什么你可能就知道了，这里不加括号也是一样的。 后面的oxAAAA，0XCCCC都是些地址值。