MSP430F5438 EVM的UC/OS-II 嵌入式操作系统的问题

在MSP430F5438 的评估板上，有一个配套的UC/OS-II嵌入式操作系统，文件os_cpu_c.c文件中OSTaskStkInit()函数中这段代码是怎么回事呀？为什么堆栈的指针一会指向0x0015，一会又变成0x1515，下面也都是这种情况，这是怎么回事呀？麻烦解释一下，谢谢了

*top– = (INT16U)((INT32U)task >>    16);
    *top– = (INT16U)((INT32U)task & 0xFFFF);                           /* Interrupt return pointer                          */
    *top– = (INT16U)0x0008;                                            /* Status register                                   */
    *top– = (INT16U)0x0015;
    *top– = (INT16U)0x1515;
    *top– = (INT16U)0x0014;
    *top– = (INT16U)0x1414;
    *top– = (INT16U)0x0013;
    *top– = (INT16U)0x1313;
    *top– = (INT16U)((INT32U)p_arg >>     16);                         /* Pass 'p_arg' through register R12                 */
    *top– = (INT16U)((INT32U)p_arg && 0xFFFF);                         /* Pass 'p_arg' through register R12                 */
    *top– = (INT16U)0x0011;           *top– = (INT16U)0x1111;
    *top– = (INT16U)0x0010;
    *top– = (INT16U)0x1010;
    *top– = (INT16U)0x0009;
    *top– = (INT16U)0x0909;
    *top– = (INT16U)0x0008;
    *top– = (INT16U)0x0808;
    *top– = (INT16U)0x0007;
    *top– = (INT16U)0x0707;
    *top– = (INT16U)0x0006;
    *top– = (INT16U)0x0606;
    *top– = (INT16U)0x0005;
    *top– = (INT16U)0x0505;
    *top– = (INT16U)0x0004;
    *top   = (INT16U)0x0404;

Shi JianHua：

目前没遇到过，无法给您解释！