LNB_CTRL_REG_1
while ((si21_readreg(state, LNB_CTRL_REG_1) & 0x8) == 8) {
status |= si21_readregs(state, LNB_CTRL_REG_1, &lnb_status, 0x01);
status |= si21_writeregs(state, LNB_CTRL_REG_1, &LNB_CTRL_1, 0x01);
if (si21_writereg(state, LNB_CTRL_REG_1,
if (si21_writereg(state, LNB_CTRL_REG_1, val))
val = (0x80 | si21_readreg(state, LNB_CTRL_REG_1));
return si21_writereg(state, LNB_CTRL_REG_1, val | 0x20);
return si21_writereg(state, LNB_CTRL_REG_1, (val & ~0x20));
val = (0x80 | si21_readreg(state, LNB_CTRL_REG_1));
return si21_writereg(state, LNB_CTRL_REG_1, val | 0x40);
return si21_writereg(state, LNB_CTRL_REG_1, (val & ~0x40));