UCOS任务切换的问题
移植完ucOSII 后，一共建立了2个任务（不包括系统的空闲任务），优先级为6，7（以下简称任务6，7），启动后任务6正常切换至7，7有1000ticks延时，然后正常跳入任务7，但是再次切换时，就直接跳至main()，百思不得其解，望大家不吝赐教。任务创建：
点击此处下载ourdev_200239.txt(文件大小:4K) ucOSii 版本为2.85
其它移植文件为ucos官方网站提供的下载 没看见你对空闲任务和统计任务的的堆栈进行调整..
因为这2个任务是系统建立的，原来的uCOSII的堆栈不分数据栈和程序返回栈的，你现在分开了就要调整,任务建立的时候也要给出差值，不知道是不是这个原因 void main(void)
{
#if (OS_TASK_NAME_SIZE > 14) && (OS_TASK_STAT_EN > 0)
INT8Uerr;
#endif
OSTaskStkSize = OS_TASK_IDLE_STK_SIZE;
OSTaskStkSizeHard = OS_TASK_IDLE_STK_SIZE_HARD;
OSInit();
//调整空闲任务堆栈尺寸
OSTCBPrioTbl->OSTCBStkSize = OSTaskStkSize - OSTaskStkSizeHard;
OSTCBPrioTbl->OSTCBStkBottom = &OSTaskIdleStk;
//调整统计任务堆栈尺寸
#if OS_TASK_STAT_EN > 0
OSTCBPrioTbl->OSTCBStkSize = OSTaskStkSize - OSTaskStkSizeHard;
OSTCBPrioTbl->OSTCBStkBottom = &OSTaskStatStk;
#endif
//设置空闲任务名称
#if OS_TASK_NAME_SIZE > 14
OSTaskNameSet(OS_IDLE_PRIO, "uC/OS-II Idle", &err);
#endif
//设置统计任务名称
#if (OS_TASK_NAME_SIZE > 14) && (OS_TASK_STAT_EN > 0)
OSTaskNameSet(OS_STAT_PRIO, "uC/OS-II Stat", &err);
#endif
//用任务建立任务
OSTaskStkSize = OS_TASK_START_STK_SIZE;
OSTaskStkSizeHard = OS_TASK_START_STK_SIZE_HARD;
OSTaskCreateExt(OSTaskStart, //void (*task)(void *pd) 任务首地址
(void *)0, //void *pdata 数据指针
&OSTaskStartStk, //OS_STK *ptos 指向任务堆栈栈顶的指针
OS_TASK_START_PRIO, //INT8U prio 任务优先级
OS_TASK_START_ID, //INT16U id 任务的ID号
&OSTaskStartStk, //OS_STK *pbos 指向任务堆栈栈底的指针
OS_TASK_START_STK_SIZE - OS_TASK_START_STK_SIZE_HARD, //INT32U stk_size 堆栈容量
(void *)0, //void *pnext 数据指针
OS_TASK_OPT_STK_CHK | OS_TASK_OPT_STK_CLR); //INT16U opt 设定OSTaskCreateExt的选项
OSTaskNameSet(OS_TASK_START_PRIO, "Task-Start", &err);
OSStart();
} 正在学习中。。。 我是使用OSTaskCreate()建立的任务，应该不需要指定OSTCBStkBottom啊
另外你说的软硬件堆栈指定，我在OSTaskStkInit()似乎看到了已经做了相应的处理，代码如下：
OS_STK*OSTaskStkInit (void (*task)(void *pd), void *p_arg, OS_STK *ptos, INT16U opt)
{
INT8U*psoft_stk;
INT8U*phard_stk; /* Temp. variable used for setting up AVR hardware stack */
INT16Utmp;
(void)opt; /* 'opt' is not used, prevent warning */
psoft_stk = (INT8U *)ptos;
phard_stk = (INT8U *)ptos
- OSTaskStkSize /* Task stack size */
+ OSTaskStkSizeHard; /* AVR return stack ("hardware stack") */
tmp = *(INT16U const *)task; /* (1) ICC compiler handles function pointers indirectly! */
*phard_stk-- = (INT8U)(tmp & 0xFF); /* Put task start address on top of "hardware stack" */
tmp >>= 8;
*phard_stk-- = (INT8U)(tmp & 0xFF);
*psoft_stk-- = (INT8U)0x00; /* R0 = 0x00 */
*psoft_stk-- = (INT8U)0x01; /* R1 = 0x01 */
*psoft_stk-- = (INT8U)0x02; /* R2 = 0x02 */
*psoft_stk-- = (INT8U)0x03; /* R3 = 0x03 */
*psoft_stk-- = (INT8U)0x04; /* R4 = 0x04 */
*psoft_stk-- = (INT8U)0x05; /* R5 = 0x05 */
*psoft_stk-- = (INT8U)0x06; /* R6 = 0x06 */
*psoft_stk-- = (INT8U)0x07; /* R7 = 0x07 */
*psoft_stk-- = (INT8U)0x08; /* R8 = 0x08 */
*psoft_stk-- = (INT8U)0x09; /* R9 = 0x09 */
*psoft_stk-- = (INT8U)0x10; /* R10 = 0x10 */
*psoft_stk-- = (INT8U)0x11; /* R11 = 0x11 */
*psoft_stk-- = (INT8U)0x12; /* R12 = 0x12 */
*psoft_stk-- = (INT8U)0x13; /* R13 = 0x13 */
*psoft_stk-- = (INT8U)0x14; /* R14 = 0x14 */
*psoft_stk-- = (INT8U)0x15; /* R15 = 0x15 */
tmp = (INT16U)p_arg;
*psoft_stk-- = (INT8U)(tmp & 0xFF); /* 'p_arg' passed in R17:R16 */
tmp >>= 8;
*psoft_stk-- = (INT8U)(tmp & 0xFF);
*psoft_stk-- = (INT8U)0x18; /* R18 = 0x18 */
*psoft_stk-- = (INT8U)0x19; /* R19 = 0x19 */
*psoft_stk-- = (INT8U)0x20; /* R20 = 0x20 */
*psoft_stk-- = (INT8U)0x21; /* R21 = 0x21 */
*psoft_stk-- = (INT8U)0x22; /* R22 = 0x22 */
*psoft_stk-- = (INT8U)0x23; /* R23 = 0x23 */
*psoft_stk-- = (INT8U)0x24; /* R24 = 0x24 */
*psoft_stk-- = (INT8U)0x25; /* R25 = 0x25 */
*psoft_stk-- = (INT8U)0x26; /* R26 = 0x26 */
*psoft_stk-- = (INT8U)0x27; /* R27 = 0x27 */
/* R28 R29:R28 is the software stack which gets ... */
/* R29 ... stored in the task's OS_TCB. */
*psoft_stk-- = (INT8U)0x30; /* R30 = 0x30 */
*psoft_stk-- = (INT8U)0x31; /* R31 = 0x31 */
*psoft_stk-- = (INT8U)0xAA; /* RAMPZ = 0xAA */
*psoft_stk-- = (INT8U)0x80; /* SREG= Interrupts enabled */
tmp = (INT16U)phard_stk;
*psoft_stk-- = (INT8U)(tmp >> 8); /* SPH */
*psoft_stk = (INT8U) tmp; /* SPL */
return ((OS_STK *)psoft_stk);
}
不知道我理解的对不对
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