ad5933_cmd
ret = ad5933_cmd(st, 0);
ret = ad5933_cmd(st, 0);
ret = ad5933_cmd(st, AD5933_CTRL_MEASURE_TEMP);
ret = ad5933_cmd(st, AD5933_CTRL_STANDBY);
ret = ad5933_cmd(st, AD5933_CTRL_INIT_START_FREQ);
return ad5933_cmd(st, AD5933_CTRL_POWER_DOWN);
ad5933_cmd(st, AD5933_CTRL_START_SWEEP);
ad5933_cmd(st, AD5933_CTRL_POWER_DOWN);
ad5933_cmd(st, AD5933_CTRL_INC_FREQ);