SHREG_SCFDR2
#define scif_fdr_read() SHREG_SCFDR2
while ((SHREG_SCFDR2 & SCFDR2_RECVCNT) == 0)
if ((SHREG_SCFDR2 & SCFDR2_RECVCNT) == 0)
while ((SHREG_SCFDR2 & SCFDR2_TXCNT) == SCFDR2_TXF_FULL)
#define scif_fdr_read() SHREG_SCFDR2