About priority grouping

Hi ,

/** \brief Get Priority Grouping
The function reads the priority grouping field from the NVIC Interrupt Controller.
\return Priority grouping field (SCB->AIRCR [10:8] PRIGROUP field).
*/
__STATIC_INLINE uint32_t NVIC_GetPriorityGrouping(void)
{
return ((SCB->AIRCR & SCB_AIRCR_PRIGROUP_Msk) >> SCB_AIRCR_PRIGROUP_Pos); /* read priority grouping field */
}

#define SCB_AIRCR_PRIGROUP_Pos 8 /*!< SCB AIRCR: PRIGROUP Position */
#define SCB_AIRCR_PRIGROUP_Msk (7UL << SCB_AIRCR_PRIGROUP_Pos) /*!< SCB AIRCR: PRIGROUP Mask */