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Add custom VIFE handling with a corrective factor (from Jakob

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Skov-Pedersen)
This commit is contained in:
Stefan Wahren 2012-10-21 11:21:07 +02:00
parent 0c26bc17a7
commit bc2c85c378
2 changed files with 61 additions and 12 deletions
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41
mbus/mbus-protocol-aux.c
View File

@ -17,6 +17,7 @@
#include <stdio.h>
#include <string.h>
#include <math.h>
#define MBUS_ERROR(...) fprintf (stderr, __VA_ARGS__)
@ -1024,14 +1025,15 @@ mbus_vib_unit_normalize(mbus_value_information_block *vib, double value, char **
return -1;
}
}
else if (vib->vif == 0x7C)
else if ((vib->vif == 0x7C) ||
(vib->vif == 0xFC))
{
// custom VIF
*unit_out = strdup("-");
*quantity_out = strdup(vib->custom_vif);
*value_out = 0.0;
}
else
*value_out = value;
}
else
{
int code = (vib->vif) & 0x7f;
if (0 != mbus_vif_unit_normalize(code, value, unit_out, value_out, quantity_out))
@ -1041,6 +1043,37 @@ mbus_vib_unit_normalize(mbus_value_information_block *vib, double value, char **
}
}
}
if ((vib->vif & MBUS_DIB_VIF_EXTENSION_BIT) &&
(vib->vif != 0xFD) &&
(vib->vif != 0xFB)) /* codes for VIF extention: see table 8.4.5 */
{
int code = (vib->vif) & 0x7f;
switch (code)
{
case 0x70:
case 0x71:
case 0x72:
case 0x73:
case 0x74:
case 0x75:
case 0x76:
case 0x77: /* Multiplicative correction factor: 10^nnn-6 */
*value_out *= pow(10.0, (vib->vife[0] & 0x07) - 6);
break;
case 0x78:
case 0x79:
case 0x7A:
case 0x7B: /* Additive correction constant: 10^nn-3 unit of VIF (offset) */
*value_out += pow(10.0, (vib->vife[0] & 0x03) - 3);
break;
case 0x7D: /* Multiplicative correction factor: 10^3 */
*value_out *= 1000.0;
break;
}
}
return 0;
}

32
mbus/mbus-protocol.c
View File

@ -2104,6 +2104,13 @@ mbus_vib_unit_lookup(mbus_value_information_block *vib)
snprintf(buff, sizeof(buff), "%s", vib->custom_vif);
return buff;
}
else if (vib->vif == 0xFC && (vib->vife[0] & 0x78) == 0x70)
{
// custom VIF
n = (vib->vife[0] & 0x07);
snprintf(buff, sizeof(buff), "%s %s", mbus_unit_prefix(n-6), vib->custom_vif);
return buff;
}
return mbus_vif_unit_lookup(vib->vif); // no extention, use VIF
}
@ -2686,21 +2693,30 @@ mbus_data_variable_parse(mbus_frame *frame, mbus_data_variable *data)
// read and parse VIB (= VIF + VIFE)
// VIF
record->drh.vib.vif = frame->data[i];
if (record->drh.vib.vif == 0x7C)
record->drh.vib.vif = frame->data[i++];
if ((record->drh.vib.vif & 0x7F) == 0x7C)
{
// variable length VIF in ASCII format
int var_vif_len;
i++;
var_vif_len = frame->data[i++];
if (i + var_vif_len > frame->data_size)
{
mbus_data_record_free(record);
return -1;
}
mbus_data_str_decode(record->drh.vib.custom_vif, &(frame->data[i]), var_vif_len);
i += var_vif_len;
}
else
// VIFE
record->drh.vib.nvife = 0;
if (record->drh.vib.vif & MBUS_DIB_VIF_EXTENSION_BIT)
{
// VIFE
record->drh.vib.nvife = 0;
record->drh.vib.vife[0] = frame->data[i];
record->drh.vib.nvife++;
while (frame->data[i] & MBUS_DIB_VIF_EXTENSION_BIT &&
record->drh.vib.nvife < NITEMS(record->drh.vib.vife))
{
@ -2710,7 +2726,7 @@ mbus_data_variable_parse(mbus_frame *frame, mbus_data_variable *data)
record->drh.vib.nvife++;
i++;
}
i++;
i++;
}
// re-calculate data length, if of variable length type