...
OS_ERR_NONE
No error.
OS_ERR_OBJ_DEL
If the event group was deleted.
OS_ERR_OBJ_PTR_NULL
If OS_CFG_ARG_CHK_EN is set to 1 in DEF_ENABLED in os_cfg.h: if p_grp is a NULL pointer.
OS_ERR_OBJ_TYPE
If OS_CFG_OBJ_TYPE_CHK_EN is set to 1 in DEF_ENABLED in os_cfg.h: p_grp is not pointing to an event flag group.
...
If OS_CFG_ARG_CHK_EN is set to 1 in DEF_ENABLED in os_cfg.h: the caller specified an invalid option.
OS_ERR_OS_NOT_RUNNING
If OS_CFG_INVALID_OS_CALLS_CHK_EN is set to DEF_ENABLED in os_cfg.h: if µC/OS-III is not running yet.
OS_ERR_PEND_ABORT
The wait on the flags was aborted by another task that called OSFlagPendAbort().
...
If OS_CFG_CALLED_FROM_ISR_CHK_EN set to 1 in DEF_ENABLED in os_cfg.h: An attempt was made to call OSFlagPend() from an ISR, which is not allowed.
OS_ERR_SCHED_LOCKED
When calling this function while the scheduler was locked.
OS_ERR_PEND_WOULD_BLOCK
If specifying non-blocking but the flags were not available and the call would block if the caller had specified OS_OPT_PEND_BLOCKING.
OS_ERR_SCHED_LOCKED
When calling this function while the scheduler was locked.
OS_ERR_STATUS_INVALID
If the pend status has an invalid value.
OS_ERR_TIMEOUT
The flags are not available within the specified amount of time.
...
The flag(s) that cause the task to be ready, 0 if either if either none of the flags are ready, or indicate an error occurred.
...
OS_CFG_FLAG_EN must be enabled in os_cfg.h. Refer to uCµC-OS-III Configuration Manual.
Callers
Application.
Notes/Warnings
...