SER_DELTA
if ((ser_sig & SER_DELTA(pps_sig)) == 0)
UART_SETSIG(sc, SER_DELTA(bitoff | biton) | biton);
#define SER_DDTR SER_DELTA(SER_DTR)
#define SER_DRTS SER_DELTA(SER_RTS)
#define SER_DSTX SER_DELTA(SER_STX)
#define SER_DSRX SER_DELTA(SER_SRX)
#define SER_DCTS SER_DELTA(SER_CTS)
#define SER_DDCD SER_DELTA(SER_DCD)
#define SER_DRI SER_DELTA(SER_RI)
#define SER_DDSR SER_DELTA(SER_DSR)
#define SER_MASK_DELTA SER_DELTA(SER_MASK_STATE)