RTK_RXCFG_RX_MULTI
~(RTK_RXCFG_RX_ALLPHYS | RTK_RXCFG_RX_INDIV | RTK_RXCFG_RX_MULTI |
rxfilt |= RTK_RXCFG_RX_MULTI;
rxfilt &= ~RTK_RXCFG_RX_MULTI;