ICSR
sr = iic_rd(pd, ICSR);
iic_wr(pd, ICSR, sr & ~(ICSR_AL | ICSR_TACK));
iic_wr(pd, ICSR, sr & ~ICSR_WAIT);
iic_rd(pd, ICSR);
u_int8_t val = iic_rd(pd, ICSR);
u_int8_t val = iic_rd(pd, ICSR);
unsigned char sr = iic_rd(pd, ICSR);