初始化任务堆栈 - uCOS-II程序设计基

任务堆栈初始化 －函数 TaskEntry task 0 0 0 0 0 0 0 0 0 0 0 0 0x1f pdata 0 PC LR R12 R11 R10 R9 R8 R7 R6 R5 R4 R3 R2 OsEnterSum CPSR R0 R1 stk = &OSTaskIdleStk [(OS_TASK_IDLE_STK_SIZE-1)-17] OS_STK *OSTaskStkInit(void (*task)(void *pd), void *pdata, OS_STK *ptos, INT16U opt) { OS_STK *stk; extern void TaskEntry(void); opt = opt; stk = ptos; *stk = (OS_STK) TaskEntry; *--stk = (OS_STK) task; *--stk = 0; *--stk = 0; *--stk = 0; *--stk = 0; *--stk = 0; *--stk = 0; *--stk = 0; *--stk = 0; *--stk = 0; *--stk = 0; *--stk = 0; *--stk = 0; *--stk = (unsigned int) pdata; *--stk = 0x1f; *--stk = 0; return (stk); } ptos = &OSTaskIdleStk [OS_TASK_IDLE_STK_SIZE-1] 内存高端 内存低端 堆栈增长方向 stk ptos