STREG
#define READ_ST(offset) STREG(offset)
STREG(offset) = (value); \
STREG(ST_WDMR) = ST_WDMR_EXTEN | ST_WDMR_RSTEN | 1;
STREG(ST_CR) = ST_CR_WDRST;
STREG(ST_WDMR) = ST_WDMR_EXTEN | ST_WDMR_RSTEN | 1;
STREG(ST_CR) = ST_CR_WDRST;