Clear bits within an event group. This function cannot be called from an interrupt.
xEventGroupThe event group in which the bits are to be cleared.
uxBitsToClearA bitwise value that indicates the bit or bits to clear in the event group. For example, to clear bit 3 only, set uxBitsToClear to 0x08. To clear bit 3 and bit 0 set uxBitsToClear to 0x09.
The value of the event group before the specified bits were cleared.