added support for cb_pcidas.c boards

diff --git a/comedi_calibrate/cb.c b/comedi_calibrate/cb.c
index 827bb85ccbe9f059a0ec80405977ffa586310c83..d2a71aaf14ccaa6f74394582c9da07c5e6a34ba1 100644 (file)
--- a/comedi_calibrate/cb.c
+++ b/comedi_calibrate/cb.c
@@ -48,20 +48,23 @@ struct board_struct{
        int (*setup)( calibration_setup_t *setup );
 };
 
-int cb_setup_board(void);
-void cb_setup_observables(void);
-
 int setup_cb_pci_64xx( calibration_setup_t *setup );
 int setup_cb_pci_60xx( calibration_setup_t *setup );
 int setup_cb_pci_4020( calibration_setup_t *setup );
+int setup_cb_pci_1xxx( calibration_setup_t *setup );
+int setup_cb_pci_1602_16( calibration_setup_t *setup );
 
 int cal_cb_pci_64xx( calibration_setup_t *setup );
 int cal_cb_pci_60xx( calibration_setup_t *setup );
 int cal_cb_pci_4020( calibration_setup_t *setup );
+int cal_cb_pci_1xxx( calibration_setup_t *setup );
+int cal_cb_pci_1602_16( calibration_setup_t *setup );
 
 int init_observables_64xx( calibration_setup_t *setup );
 int init_observables_60xx( calibration_setup_t *setup );
 int init_observables_4020( calibration_setup_t *setup );
+int init_observables_1xxx( calibration_setup_t *setup );
+int init_observables_1602_16( calibration_setup_t *setup );
 
 int actual_source_voltage( comedi_t *dev, unsigned int subdevice, unsigned int eeprom_channel, float *voltage);
 
@@ -76,6 +79,14 @@ static struct board_struct boards[]={
        { "pci-das6034",        STATUS_GUESS,   setup_cb_pci_60xx },
        { "pci-das6035",        STATUS_GUESS,   setup_cb_pci_60xx },
        { "pci-das4020/12",     STATUS_DONE,    setup_cb_pci_4020 },
+       { "pci-das1000",        STATUS_GUESS,   setup_cb_pci_1xxx },
+       { "pci-das1001",        STATUS_GUESS,   setup_cb_pci_1xxx },
+       { "pci-das1002",        STATUS_GUESS,   setup_cb_pci_1xxx },
+       { "pci-das1200",        STATUS_GUESS,   setup_cb_pci_1xxx },
+       { "pci-das1200/jr",     STATUS_GUESS,   setup_cb_pci_1xxx },
+       { "pci-das1602/12",     STATUS_GUESS,   setup_cb_pci_1xxx },
+       { "pci-das1602/16",     STATUS_GUESS,   setup_cb_pci_1602_16 },
+       { "pci-das1602/16/jr",  STATUS_GUESS,   setup_cb_pci_1602_16 },
 };
 
 static const int num_boards = ( sizeof(boards) / sizeof(boards[0]) );
@@ -90,6 +101,16 @@ enum observables_64xx {
        OBS_7V_RANGE_10V_BIP_64XX,
 };
 
+enum observables_1xxx {
+       OBS_0V_RANGE_10V_BIP_1XXX = 0,
+       OBS_7V_RANGE_10V_BIP_1XXX,
+};
+
+enum observables_1602_16 {
+       OBS_0V_RANGE_10V_BIP_1602_16 = 0,
+       OBS_7V_RANGE_10V_BIP_1602_16,
+};
+
 int cb_setup( calibration_setup_t *setup, const char *device_name )
 {
        unsigned int i;
@@ -139,6 +160,32 @@ int setup_cb_pci_4020( calibration_setup_t *setup )
        return 0;
 }
 
+int setup_cb_pci_1xxx( calibration_setup_t *setup )
+{
+       static const int caldac_subdev = 4;
+       static const int calpot_subdev = 5;
+
+       init_observables_1xxx( setup );
+       setup_caldacs( setup, caldac_subdev );
+       setup_caldacs( setup, calpot_subdev );
+       setup->do_cal = cal_cb_pci_1xxx;
+       return 0;
+}
+
+int setup_cb_pci_1602_16( calibration_setup_t *setup )
+{
+       static const int caldac_subdev = 4;
+       static const int calpot_subdev = 5;
+       static const int dac08_subdev = 6;
+
+       init_observables_1602_16( setup );
+       setup_caldacs( setup, caldac_subdev );
+       setup_caldacs( setup, calpot_subdev );
+       setup_caldacs( setup, dac08_subdev );
+       setup->do_cal = cal_cb_pci_1602_16;
+       return 0;
+}
+
 int init_observables_64xx( calibration_setup_t *setup )
 {
        comedi_insn tmpl, po_tmpl;
@@ -154,6 +201,17 @@ int init_observables_64xx( calibration_setup_t *setup )
                EEPROM_875mV_CHAN = 0x36,
                EEPROM_8600uV_CHAN = 0x38,
        };
+       enum calibration_source
+       {
+               CAL_SRC_GROUND = 0,
+               CAL_SRC_7V = 1,
+               CAL_SRC_3500mV = 2,
+               CAL_SRC_1750mV = 3,
+               CAL_SRC_875mV = 4,
+               CAL_SRC_8600uV = 5,
+               CAL_SRC_DAC0 = 6,
+               CAL_SRC_DAC1 = 7,
+       };
 
        memset( &po_tmpl, 0, sizeof(po_tmpl) );
        po_tmpl.insn = INSN_CONFIG;
@@ -170,7 +228,7 @@ int init_observables_64xx( calibration_setup_t *setup )
        o->preobserve_insn = po_tmpl;
        o->preobserve_insn.data = o->preobserve_data;
        o->preobserve_insn.data[0] = INSN_CONFIG_ALT_SOURCE;
-       o->preobserve_insn.data[1] = 0;
+       o->preobserve_insn.data[1] = CAL_SRC_GROUND;
        o->observe_insn = tmpl;
        o->observe_insn.chanspec = CR_PACK( 0, 0, AREF_GROUND) | CR_ALT_SOURCE | CR_ALT_FILTER;
        o->target = 0.0;
@@ -180,7 +238,7 @@ int init_observables_64xx( calibration_setup_t *setup )
        o->preobserve_insn = po_tmpl;
        o->preobserve_insn.data = o->preobserve_data;
        o->preobserve_insn.data[0] = INSN_CONFIG_ALT_SOURCE;
-       o->preobserve_insn.data[1] = 1;
+       o->preobserve_insn.data[1] = CAL_SRC_7V;
        o->observe_insn = tmpl;
        o->observe_insn.chanspec = CR_PACK( 0, 0, AREF_GROUND) | CR_ALT_SOURCE | CR_ALT_FILTER;
        o->target = 7.0;
@@ -208,6 +266,17 @@ int init_observables_60xx( calibration_setup_t *setup )
                EEPROM_50mV_CHAN = 0x3e,
                EEPROM_8mV_CHAN = 0x40,
        };
+       enum calibration_source
+       {
+               CAL_SRC_GROUND = 0,
+               CAL_SRC_10V = 1,
+               CAL_SRC_5V = 2,
+               CAL_SRC_500mV = 3,
+               CAL_SRC_50mV = 4,
+               CAL_SRC_5mV = 5,        // XXX check
+               CAL_SRC_DAC0 = 6,
+               CAL_SRC_DAC1 = 7,
+       };
 
        memset( &po_tmpl, 0, sizeof(po_tmpl) );
        po_tmpl.insn = INSN_CONFIG;
@@ -224,7 +293,7 @@ int init_observables_60xx( calibration_setup_t *setup )
        o->preobserve_insn = po_tmpl;
        o->preobserve_insn.data = o->preobserve_data;
        o->preobserve_insn.data[0] = INSN_CONFIG_ALT_SOURCE;
-       o->preobserve_insn.data[1] = 0;
+       o->preobserve_insn.data[1] = CAL_SRC_GROUND;
        o->observe_insn = tmpl;
        o->observe_insn.chanspec = CR_PACK( 0, 0, AREF_GROUND) | CR_ALT_SOURCE | CR_ALT_FILTER;
        o->target = 0.0;
@@ -234,7 +303,7 @@ int init_observables_60xx( calibration_setup_t *setup )
        o->preobserve_insn = po_tmpl;
        o->preobserve_insn.data = o->preobserve_data;
        o->preobserve_insn.data[0] = INSN_CONFIG_ALT_SOURCE;
-       o->preobserve_insn.data[1] = 2;
+       o->preobserve_insn.data[1] = CAL_SRC_5V;
        o->observe_insn = tmpl;
        o->observe_insn.chanspec = CR_PACK( 0, 0, AREF_GROUND) | CR_ALT_SOURCE | CR_ALT_FILTER;
        o->target = 5.0;
@@ -259,6 +328,12 @@ int init_observables_4020( calibration_setup_t *setup )
                EEPROM_4375mV_CHAN = 0x30,
                EEPROM_625mV_CHAN = 0x32,
        };
+       enum calibration_source
+       {
+               CAL_SRC_4375mV = 5,
+               CAL_SRC_625mV = 6,
+               CAL_SRC_GROUND = 7,
+       };
 
        memset( &po_tmpl, 0, sizeof(po_tmpl) );
        po_tmpl.insn = INSN_CONFIG;
@@ -275,7 +350,7 @@ int init_observables_4020( calibration_setup_t *setup )
        o->preobserve_insn = po_tmpl;
        o->preobserve_insn.data = o->preobserve_data;
        o->preobserve_insn.data[0] = INSN_CONFIG_ALT_SOURCE;
-       o->preobserve_insn.data[1] = 7;
+       o->preobserve_insn.data[1] = CAL_SRC_GROUND;
        o->observe_insn = tmpl;
        o->observe_insn.chanspec = CR_PACK( 0, 0, AREF_GROUND) | CR_ALT_SOURCE | CR_ALT_FILTER;
        o->target = 0.0;
@@ -286,7 +361,7 @@ int init_observables_4020( calibration_setup_t *setup )
        o->preobserve_insn = po_tmpl;
        o->preobserve_insn.data = o->preobserve_data;
        o->preobserve_insn.data[0] = INSN_CONFIG_ALT_SOURCE;
-       o->preobserve_insn.data[1] = 7;
+       o->preobserve_insn.data[1] = CAL_SRC_GROUND;
        o->observe_insn = tmpl;
        o->observe_insn.chanspec = CR_PACK( 1, 0, AREF_GROUND) | CR_ALT_SOURCE | CR_ALT_FILTER;
        o->target = 0.0;
@@ -296,7 +371,7 @@ int init_observables_4020( calibration_setup_t *setup )
        o->preobserve_insn = po_tmpl;
        o->preobserve_insn.data = o->preobserve_data;
        o->preobserve_insn.data[0] = INSN_CONFIG_ALT_SOURCE;
-       o->preobserve_insn.data[1] = 7;
+       o->preobserve_insn.data[1] = CAL_SRC_GROUND;
        o->observe_insn = tmpl;
        o->observe_insn.chanspec = CR_PACK( 2, 0, AREF_GROUND) | CR_ALT_SOURCE | CR_ALT_FILTER;
        o->target = 0.0;
@@ -306,7 +381,7 @@ int init_observables_4020( calibration_setup_t *setup )
        o->preobserve_insn = po_tmpl;
        o->preobserve_insn.data = o->preobserve_data;
        o->preobserve_insn.data[0] = INSN_CONFIG_ALT_SOURCE;
-       o->preobserve_insn.data[1] = 7;
+       o->preobserve_insn.data[1] = CAL_SRC_GROUND;
        o->observe_insn = tmpl;
        o->observe_insn.chanspec = CR_PACK( 3, 0, AREF_GROUND) | CR_ALT_SOURCE | CR_ALT_FILTER;
        o->target = 0.0;
@@ -316,7 +391,7 @@ int init_observables_4020( calibration_setup_t *setup )
        o->preobserve_insn = po_tmpl;
        o->preobserve_insn.data = o->preobserve_data;
        o->preobserve_insn.data[0] = INSN_CONFIG_ALT_SOURCE;
-       o->preobserve_insn.data[1] = 5;
+       o->preobserve_insn.data[1] = CAL_SRC_4375mV;
        o->observe_insn = tmpl;
        o->observe_insn.chanspec = CR_PACK( 0, 0, AREF_GROUND) | CR_ALT_SOURCE | CR_ALT_FILTER;
        o->target = 4.375;
@@ -329,7 +404,7 @@ int init_observables_4020( calibration_setup_t *setup )
        o->preobserve_insn = po_tmpl;
        o->preobserve_insn.data = o->preobserve_data;
        o->preobserve_insn.data[0] = INSN_CONFIG_ALT_SOURCE;
-       o->preobserve_insn.data[1] = 5;
+       o->preobserve_insn.data[1] = CAL_SRC_4375mV;
        o->observe_insn = tmpl;
        o->observe_insn.chanspec = CR_PACK( 1, 0, AREF_GROUND) | CR_ALT_SOURCE | CR_ALT_FILTER;
        o->target = 4.375;
@@ -342,7 +417,7 @@ int init_observables_4020( calibration_setup_t *setup )
        o->preobserve_insn = po_tmpl;
        o->preobserve_insn.data = o->preobserve_data;
        o->preobserve_insn.data[0] = INSN_CONFIG_ALT_SOURCE;
-       o->preobserve_insn.data[1] = 5;
+       o->preobserve_insn.data[1] = CAL_SRC_4375mV;
        o->observe_insn = tmpl;
        o->observe_insn.chanspec = CR_PACK( 2, 0, AREF_GROUND) | CR_ALT_SOURCE | CR_ALT_FILTER;
        o->target = 4.375;
@@ -355,7 +430,7 @@ int init_observables_4020( calibration_setup_t *setup )
        o->preobserve_insn = po_tmpl;
        o->preobserve_insn.data = o->preobserve_data;
        o->preobserve_insn.data[0] = INSN_CONFIG_ALT_SOURCE;
-       o->preobserve_insn.data[1] = 5;
+       o->preobserve_insn.data[1] = CAL_SRC_4375mV;
        o->observe_insn = tmpl;
        o->observe_insn.chanspec = CR_PACK( 3, 0, AREF_GROUND) | CR_ALT_SOURCE | CR_ALT_FILTER;
        o->target = 4.375;
@@ -368,9 +443,147 @@ int init_observables_4020( calibration_setup_t *setup )
        return 0;
 }
 
+int init_observables_1xxx( calibration_setup_t *setup )
+{
+       comedi_insn tmpl, po_tmpl;
+       observable *o;
+       static const int ai_subdev = 0;
+#if 0
+// XXX need to figure out eeprom map
+       int retval;
+       float target;
+       enum source_eeprom_addr
+       {
+               EEPROM_7V_CHAN = 0x30,
+               EEPROM_3500mV_CHAN = 0x32,
+               EEPROM_1750mV_CHAN = 0x34,
+               EEPROM_875mV_CHAN = 0x36,
+               EEPROM_8600uV_CHAN = 0x38,
+       };
+#endif
+       enum calibration_source
+       {
+               CAL_SRC_GROUND = 0,
+               CAL_SRC_7V = 1,
+               CAL_SRC_3500mV = 2,
+               CAL_SRC_1750mV = 3,
+               CAL_SRC_875mV = 4,
+               CAL_SRC_8600uV = 5,
+               CAL_SRC_DAC0 = 6,
+               CAL_SRC_DAC1 = 7,
+       };
+
+       memset( &po_tmpl, 0, sizeof(po_tmpl) );
+       po_tmpl.insn = INSN_CONFIG;
+       po_tmpl.n = 2;
+       po_tmpl.subdev = ai_subdev;
+
+       memset( &tmpl, 0, sizeof(tmpl) );
+       tmpl.insn = INSN_READ;
+       tmpl.n = 1;
+       tmpl.subdev = ai_subdev;
+
+       o = setup->observables + OBS_0V_RANGE_10V_BIP_1XXX;
+       o->name = "ground calibration source, 10V bipolar range, ground referenced";
+       o->preobserve_insn = po_tmpl;
+       o->preobserve_insn.data = o->preobserve_data;
+       o->preobserve_insn.data[0] = INSN_CONFIG_ALT_SOURCE;
+       o->preobserve_insn.data[1] = CAL_SRC_GROUND;
+       o->observe_insn = tmpl;
+       o->observe_insn.chanspec = CR_PACK( 0, 0, AREF_GROUND) | CR_ALT_SOURCE | CR_ALT_FILTER;
+       o->target = 0.0;
+
+       o = setup->observables + OBS_7V_RANGE_10V_BIP_1XXX;
+       o->name = "7V calibration source, 10V bipolar range, ground referenced";
+       o->preobserve_insn = po_tmpl;
+       o->preobserve_insn.data = o->preobserve_data;
+       o->preobserve_insn.data[0] = INSN_CONFIG_ALT_SOURCE;
+       o->preobserve_insn.data[1] = CAL_SRC_7V;
+       o->observe_insn = tmpl;
+       o->observe_insn.chanspec = CR_PACK( 0, 0, AREF_GROUND) | CR_ALT_SOURCE | CR_ALT_FILTER;
+       o->target = 7.0;
+#if 0
+       retval = actual_source_voltage( setup->dev, setup->eeprom_subdev, EEPROM_7V_CHAN, &target );
+       if( retval == 0 )
+               o->target = target;
+#endif
+       setup->n_observables = 2;
+
+       return 0;
+}
+
+int init_observables_1602_16( calibration_setup_t *setup )
+{
+       comedi_insn tmpl, po_tmpl;
+       observable *o;
+       static const int ai_subdev = 0;
+#if 0
+// XXX need to figure out eeprom map
+       int retval;
+       float target;
+       enum source_eeprom_addr
+       {
+               EEPROM_7V_CHAN = 0x30,
+               EEPROM_3500mV_CHAN = 0x32,
+               EEPROM_1750mV_CHAN = 0x34,
+               EEPROM_875mV_CHAN = 0x36,
+               EEPROM_8600uV_CHAN = 0x38,
+       };
+#endif
+       enum calibration_source
+       {
+               CAL_SRC_GROUND = 0,
+               CAL_SRC_7V = 1,
+               CAL_SRC_3500mV = 2,
+               CAL_SRC_1750mV = 3,
+               CAL_SRC_875mV = 4,
+               CAL_SRC_8600uV = 5,
+               CAL_SRC_DAC0 = 6,
+               CAL_SRC_DAC1 = 7,
+       };
+
+       memset( &po_tmpl, 0, sizeof(po_tmpl) );
+       po_tmpl.insn = INSN_CONFIG;
+       po_tmpl.n = 2;
+       po_tmpl.subdev = ai_subdev;
+
+       memset( &tmpl, 0, sizeof(tmpl) );
+       tmpl.insn = INSN_READ;
+       tmpl.n = 1;
+       tmpl.subdev = ai_subdev;
+
+       o = setup->observables + OBS_0V_RANGE_10V_BIP_1602_16;
+       o->name = "ground calibration source, 10V bipolar range, ground referenced";
+       o->preobserve_insn = po_tmpl;
+       o->preobserve_insn.data = o->preobserve_data;
+       o->preobserve_insn.data[0] = INSN_CONFIG_ALT_SOURCE;
+       o->preobserve_insn.data[1] = CAL_SRC_GROUND;
+       o->observe_insn = tmpl;
+       o->observe_insn.chanspec = CR_PACK( 0, 0, AREF_GROUND) | CR_ALT_SOURCE | CR_ALT_FILTER;
+       o->target = 0.0;
+
+       o = setup->observables + OBS_7V_RANGE_10V_BIP_1602_16;
+       o->name = "7V calibration source, 10V bipolar range, ground referenced";
+       o->preobserve_insn = po_tmpl;
+       o->preobserve_insn.data = o->preobserve_data;
+       o->preobserve_insn.data[0] = INSN_CONFIG_ALT_SOURCE;
+       o->preobserve_insn.data[1] = CAL_SRC_7V;
+       o->observe_insn = tmpl;
+       o->observe_insn.chanspec = CR_PACK( 0, 0, AREF_GROUND) | CR_ALT_SOURCE | CR_ALT_FILTER;
+       o->target = 7.0;
+#if 0
+       retval = actual_source_voltage( setup->dev, setup->eeprom_subdev, EEPROM_7V_CHAN, &target );
+       if( retval == 0 )
+               o->target = target;
+#endif
+       setup->n_observables = 2;
+
+       return 0;
+}
+
 int cal_cb_pci_64xx( calibration_setup_t *setup )
 {
-       enum caldacs_64xx
+       enum cal_knobs_64xx
        {
                DAC0_GAIN_FINE = 0,
                DAC0_GAIN_COARSE,
@@ -395,7 +608,7 @@ int cal_cb_pci_64xx( calibration_setup_t *setup )
 
 int cal_cb_pci_60xx( calibration_setup_t *setup )
 {
-       enum caldacs_60xx
+       enum cal_knobs_60xx
        {
                DAC0_OFFSET = 0,
                DAC0_GAIN,
@@ -424,7 +637,7 @@ int cal_cb_pci_60xx( calibration_setup_t *setup )
 
 int cal_cb_pci_4020( calibration_setup_t *setup )
 {
-       enum caldacs_4020
+       enum cal_knobs_4020
        {
                ADC0_OFFSET = 0,
                ADC1_OFFSET,
@@ -448,21 +661,77 @@ int cal_cb_pci_4020( calibration_setup_t *setup )
        cal1( setup, 3, ADC3_OFFSET );
        cal1_fine( setup, 3, ADC3_OFFSET );
 
-       cal1( setup, 4, ADC0_GAIN );
+       cal_binary( setup, 4, ADC0_GAIN );
        cal1_fine( setup, 4, ADC0_GAIN );
 
-       cal1( setup, 5, ADC1_GAIN );
+       cal_binary( setup, 5, ADC1_GAIN );
        cal1_fine( setup, 5, ADC1_GAIN );
 
-       cal1( setup, 6, ADC2_GAIN );
+       cal_binary( setup, 6, ADC2_GAIN );
        cal1_fine( setup, 6, ADC2_GAIN );
 
-       cal1( setup, 7, ADC3_GAIN );
+       cal_binary( setup, 7, ADC3_GAIN );
        cal1_fine( setup, 7, ADC3_GAIN );
 
        return 0;
 }
 
+int cal_cb_pci_1xxx( calibration_setup_t *setup )
+{
+       enum cal_knobs_1xxx
+       {
+               DAC0_GAIN_FINE = 0,
+               DAC0_GAIN_COARSE,
+               DAC0_OFFSET,
+               DAC1_OFFSET,
+               DAC1_GAIN_FINE,
+               DAC1_GAIN_COARSE,
+               ADC_OFFSET_COARSE,
+               ADC_OFFSET_FINE,
+               ADC_GAIN,
+       };
+
+       cal1( setup, OBS_0V_RANGE_10V_BIP_1XXX, ADC_OFFSET_COARSE );
+       cal1_fine( setup, OBS_0V_RANGE_10V_BIP_1XXX, ADC_OFFSET_COARSE );
+
+       cal1( setup, OBS_0V_RANGE_10V_BIP_1XXX, ADC_OFFSET_FINE );
+       cal1_fine( setup, OBS_0V_RANGE_10V_BIP_1XXX, ADC_OFFSET_FINE );
+
+       cal1( setup, OBS_7V_RANGE_10V_BIP_1XXX, ADC_GAIN );
+       cal1_fine( setup, OBS_7V_RANGE_10V_BIP_1XXX, ADC_GAIN );
+
+       return 0;
+}
+
+int cal_cb_pci_1602_16( calibration_setup_t *setup )
+{
+       enum cal_knobs_1602_16
+       {
+               DAC0_GAIN_FINE = 0,
+               DAC0_GAIN_COARSE,
+               DAC0_OFFSET_COARSE,
+               DAC1_OFFSET_COARSE,
+               DAC1_GAIN_FINE,
+               DAC1_GAIN_COARSE,
+               DAC0_OFFSET_FINE,
+               DAC1_OFFSET_FINE,
+               ADC_GAIN,
+               ADC_POSTGAIN_OFFSET,
+               ADC_PREGAIN_OFFSET,
+       };
+
+       cal1( setup, OBS_0V_RANGE_10V_BIP_1602_16, ADC_PREGAIN_OFFSET );
+       cal1_fine( setup, OBS_0V_RANGE_10V_BIP_1602_16, ADC_PREGAIN_OFFSET );
+
+       cal1( setup, OBS_0V_RANGE_10V_BIP_1602_16, ADC_POSTGAIN_OFFSET );
+       cal1_fine( setup, OBS_0V_RANGE_10V_BIP_1602_16, ADC_POSTGAIN_OFFSET );
+
+       cal1( setup, OBS_7V_RANGE_10V_BIP_1602_16, ADC_GAIN );
+       cal1_fine( setup, OBS_7V_RANGE_10V_BIP_1602_16, ADC_GAIN );
+
+       return 0;
+}
+
 // converts calibration source voltages from two 16 bit eeprom values to a floating point value
 float eeprom_to_source(uint16_t ls_word, uint16_t ms_word)
 {