【UCOSIII】【中断管理、时间管理】OS_CRITICAL_ENTER()、OS_CRITICAL_EXIT()、OSTimeDlyHMSM
中断管理
2种方式：直接发布、延时发布
OS_CFG_ISR_POST_DEFERRED_EN = 1 延时发布 中断消息 defer ISR POST En使能
OS_CFG_ISR_POST_DEFERRED_EN = 0 直接发布 中断消息
1.延时发布
#if OS_CFG_ISR_POST_DEFERRED_EN > 0u /* Deferred ISR Posts ------------------------------ */
/* Lock the scheduler */
/*if：如果采用 延迟发布 中断处理*/
//访问全局资源OSSchedLockNestingCtr
//才 关中断CPU_CRITICAL_ENTER() 打开中断CPU_CRITICAL_EXIT()
//对临界段代码的保护还是采用调度器加锁的方式
//进入临界区 给 调度器上锁
#define OS_CRITICAL_ENTER() \
do { \
CPU_CRITICAL_ENTER(); \
OSSchedLockNestingCtr++; \
if (OSSchedLockNestingCtr == 1u) { \
OS_SCHED_LOCK_TIME_MEAS_START(); \
} \
CPU_CRITICAL_EXIT(); \
} while (0)
//退出临界区 给 调度器解锁
#define OS_CRITICAL_EXIT() \
do { \
CPU_CRITICAL_ENTER(); \
OSSchedLockNestingCtr--; \
if (OSSchedLockNestingCtr == (OS_NESTING_CTR)0) { \
OS_SCHED_LOCK_TIME_MEAS_STOP(); \
if (OSIntQNbrEntries > (OS_OBJ_QTY)0) { \
CPU_CRITICAL_EXIT(); \
OS_Sched0(); \
} else { \
CPU_CRITICAL_EXIT(); \
} \
} else { \
CPU_CRITICAL_EXIT(); \
} \
} while (0)2.直接发布
/*else： 直接发布 中断服务程序 */
//关中断 保护临界代码区
//CPU_CRITICAL_ENTER() 最终调用 CPU_SR_Save() 在cpu_a.asm 用汇编定义
#define OS_CRITICAL_ENTER() CPU_CRITICAL_ENTER()
//开中断 退出
//CPU_CRITICAL_EXIT() 最终调用 CPU_SR_Restore() 在cpu_a.asm 用汇编定义
#define OS_CRITICAL_EXIT() CPU_CRITICAL_EXIT()
#endif时间管理
1. OSTimeDlyHMSM(0,0,1,0,OS_OPT_TIME_HMSM_STRICT,&err);
hour：0-99
minutes：0-59
seconds：0-59
milli：0-999
opt：OS_OPT_TIME_HMSM_STRICT
#if OS_CFG_TIME_DLY_HMSM_EN > 0u
/* 任务延时函数 */
void OSTimeDlyHMSM (CPU_INT16U hours, //0-99
CPU_INT16U minutes, //0-59
CPU_INT16U seconds, //0-59
CPU_INT32U milli, //0-999
OS_OPT opt, //OS_OPT_TIME_HMSM_STRICT严格参数
OS_ERR *p_err)
{
#if OS_CFG_ARG_CHK_EN > 0u
CPU_BOOLEAN opt_invalid;
CPU_BOOLEAN opt_non_strict;
#endif
OS_OPT opt_time;
OS_RATE_HZ tick_rate;
OS_TICK ticks;
CPU_SR_ALLOC();
#ifdef OS_SAFETY_CRITICAL
if (p_err == (OS_ERR *)0) {
OS_SAFETY_CRITICAL_EXCEPTION();
return;
}
#endif
#if OS_CFG_CALLED_FROM_ISR_CHK_EN > 0u
if (OSIntNestingCtr > (OS_NESTING_CTR)0u) { /* Not allowed to call from an ISR */
*p_err = OS_ERR_TIME_DLY_ISR;
return;
}
#endif
if (OSSchedLockNestingCtr > (OS_NESTING_CTR)0u) { /* Can't delay when the scheduler is locked */
*p_err = OS_ERR_SCHED_LOCKED;
return;
}
opt_time = opt & OS_OPT_TIME_MASK; /* Retrieve time options only. */
switch (opt_time) {
case OS_OPT_TIME_DLY:
case OS_OPT_TIME_TIMEOUT:
case OS_OPT_TIME_PERIODIC:
if (milli == (CPU_INT32U)0u) { /* Make sure we didn't specify a 0 delay */
if (seconds == (CPU_INT16U)0u) {
if (minutes == (CPU_INT16U)0u) {
if (hours == (CPU_INT16U)0u) {
*p_err = OS_ERR_TIME_ZERO_DLY;
return;
}
}
}
}
break;
case OS_OPT_TIME_MATCH:
break;
default:
*p_err = OS_ERR_OPT_INVALID;
return;
}
#if OS_CFG_ARG_CHK_EN > 0u /* Validate arguments to be within range */
opt_invalid = DEF_BIT_IS_SET_ANY(opt, ~OS_OPT_TIME_OPTS_MASK);
if (opt_invalid == DEF_YES) {
*p_err = OS_ERR_OPT_INVALID;
return;
}
opt_non_strict = DEF_BIT_IS_SET(opt, OS_OPT_TIME_HMSM_NON_STRICT);
if (opt_non_strict != DEF_YES) {
if (milli > (CPU_INT32U)999u) {
*p_err = OS_ERR_TIME_INVALID_MILLISECONDS;
return;
}
if (seconds > (CPU_INT16U)59u) {
*p_err = OS_ERR_TIME_INVALID_SECONDS;
return;
}
if (minutes > (CPU_INT16U)59u) {
*p_err = OS_ERR_TIME_INVALID_MINUTES;
return;
}
if (hours > (CPU_INT16U)99u) {
*p_err = OS_ERR_TIME_INVALID_HOURS;
return;
}
} else {
if (minutes > (CPU_INT16U)9999u) {
*p_err = OS_ERR_TIME_INVALID_MINUTES;
return;
}
if (hours > (CPU_INT16U)999u) {
*p_err = OS_ERR_TIME_INVALID_HOURS;
return;
}
}
#endif
/* Compute the total number of clock ticks required.. */
/* .. (rounded to the nearest tick) */
//默认 系统时钟节拍：200Hz 5ms
tick_rate = OSCfg_TickRate_Hz;
ticks = ((OS_TICK)hours * (OS_TICK)3600u + (OS_TICK)minutes * (OS_TICK)60u + (OS_TICK)seconds) * tick_rate
+ (tick_rate * ((OS_TICK)milli + (OS_TICK)500u / tick_rate)) / (OS_TICK)1000u;
if (ticks > (OS_TICK)0u) {
OS_CRITICAL_ENTER();
OSTCBCurPtr->TaskState = OS_TASK_STATE_DLY;
OS_TickListInsert(OSTCBCurPtr,
ticks,
opt_time,
p_err);
if (*p_err != OS_ERR_NONE) {
OS_CRITICAL_EXIT_NO_SCHED();
return;
}
OS_RdyListRemove(OSTCBCurPtr); /* Remove current task from ready list */
OS_CRITICAL_EXIT_NO_SCHED();
OSSched(); /* Find next task to run! */
*p_err = OS_ERR_NONE;
} else {
*p_err = OS_ERR_TIME_ZERO_DLY;
}
}
#endif2. OSTimeDly（）
void OSTimeDly (OS_TICK dly,
OS_OPT opt,
OS_ERR *p_err)