OSFlagPendGetFlagsRdy

Description

Returns the flags that caused the current task to be ready-to-run. This function allows the user to know “Who did it!”

Files

os.h/os_flag.c

Prototype

OS_FLAGS  OSFlagPendGetFlagsRdy (OS_ERR  *p_err)

Arguments

p_err

is a pointer to an error code and can be:

OS_ERR_NONE

No error.

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_ISR

If OS_CFG_CALLED_FROM_ISR_CHK_EN set to DEF_ENABLED in os_cfg.h: When attempting to call this function from an ISR.

Returned Value

The value of the flags that caused the current task to become ready-to-run.

Required Configuration

OS_CFG_FLAG_EN must be enabled in os_cfg.h. Refer to µC-OS-III Configuration Manual.

Callers

Application.

Notes/Warnings

The event flag group must be created before it is used.

Example Usage

OSFlagPendGetFlagsRdy() example usage

          #define  ENGINE_OIL_PRES_OK   0x01
          #define  ENGINE_OIL_TEMP_OK   0x02
          #define  ENGINE_START         0x04
           
          OS_FLAG_GRP  EngineStatus;
           
           
          void Task (void *p_arg)
          {
              OS_ERR    err;
              OS_FLAGS  value;
              OS_FLAGS  flags_rdy;
           
           
              (void)&p_arg;
              while (DEF_ON) {
                  value     = OSFlagPend(&EngineStatus,
                                         ENGINE_OIL_PRES_OK   + ENGINE_OIL_TEMP_OK,
                                         OS_FLAG_WAIT_SET_ALL + OS_FLAG_CONSUME,
                                         10,
                                         &err);
                  /* Check "err" */
                  flags_rdy = OSFlagPendGetFlagsRdy(&err);
                  /* Check "err" */
                  :
                  :
             }
          }

µC/OS-III Documentation