ME_DAC_CTRL_BIPOLAR 86 drivers/staging/comedi/drivers/me_daq.c #define ME_DAC_CTRL_MASK(x) (ME_DAC_CTRL_BIPOLAR(x) | \ ME_DAC_CTRL_BIPOLAR 319 drivers/staging/comedi/drivers/me_daq.c devpriv->dac_ctrl |= ME_DAC_CTRL_BIPOLAR(chan);