FXP_CSR_SCB_STATACK
tmp = CSR_READ_1(sc, FXP_CSR_SCB_STATACK);
CSR_WRITE_1(sc, FXP_CSR_SCB_STATACK, tmp);
while ((statack = CSR_READ_1(sc, FXP_CSR_SCB_STATACK)) != 0) {
CSR_WRITE_1(sc, FXP_CSR_SCB_STATACK, statack);
} while ((statack = CSR_READ_1(sc, FXP_CSR_SCB_STATACK)) != 0);
CSR_READ_1(sc, FXP_CSR_SCB_STATACK),
uint8_t statack = CSR_READ_1(sc, FXP_CSR_SCB_STATACK);