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libsigrok/src/dmm/eev121gw.c

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/*
* This file is part of the libsigrok project.
*
* Copyright (C) 2018 Gerhard Sittig <gerhard.sittig@gmx.net>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, see <http://www.gnu.org/licenses/>.
*/
/**
* @file
*
* EEVblog 121GW 19-bytes binary protocol parser.
*
* @internal
*
* Note that this protocol is different from other meters. We need not
* decode the LCD presentation (segments a-g and dot of seven segment
* displays). Neither need we decode a textual presentation consisting
* of number strings with decimals, and scale/quantity suffixes. Instead
* a binary packet is received which contains an unsigned mantissa for
* the value, and a number of boolean flags as well as bitfields for modes
* and ranges.
*
* But the protocol is also similar to the four-display variant of the
* metex14 protocol. A single DMM packet contains information for two
* displays and a bargraph, as well as several flags corresponding to
* display indicators and global device state. The vendor's documentation
* refers to these sections as "main", "sub", "bar", and "icon".
*
* It's essential to understand that the serial-dmm API is only able to
* communicate a single float value (including its precision and quantity
* details) in a single parse call. Which is why we keep a channel index
* in the 'info' structure, and run the parse routine several times upon
* reception of a single packet. This approach is shared with the metex14
* parser.
*
* The parse routine here differs from other DMM parsers which typically
* are split into routines which parse a value (get a number and exponent),
* parse flags, and handle flags which were parsed before. The 121GW
* meter's packets don't fit this separation naturally, getting the value
* and related flags heavily depends on which display shall get inspected,
* thus should be done at the same time. Filling in an 'info' structure
* from packet content first, and mapping this 'info' to the 'analog'
* details then still is very useful for maintainability.
*
* TODO:
* - The meter is feature packed. This implementation does support basic
* operation (voltage, current, power, resistance, continuity, diode,
* capacitance, temperature). Support for remaining modes, previously
* untested ranges, and advanced features (DC+AC, VA power, dB gain,
* burden voltage) may be missing or incomplete. Ranges support and
* value scaling should be considered "under development" in general
* until test coverage was increased. Some flags are not evaluated
* correctly yet, or not at all (min/max/avg, memory).
* - Test previously untested modes: current, power, gain, sub display
* modes. Test untested ranges (voltage above 30V, temperature above
* 30deg (into the hundreds), negative temperatures, large resistors,
* large capacitors). Test untested features (min/max/avg, 1ms peak,
* log memory).
* - It's assumed that a continuous data stream was arranged for. This
* implementation does not support the "packet request" API. Also I
* was to understand that once the request was sent (write 0300 to
* handle 9, after connecting) no further request is needed. Only
* the loss of communication may need recovery, which we leave as an
* option for later improvement, or as a feature of an external helper
* which feeds the COM port from Bluetooth communication data, or
* abstracts away the BLE communication.
*
* Implementation notes:
* - Yes some ranges seem duplicate but that's fine. The meter's packets
* do provide multiple range indices for some of the modes which do
* communicate values in the same range of values.
* - Some of the packet's bits don't match the available documentation.
* Some of the meter's features are not available to the PC side by
* means of inspecting packets.
* - Bit 5 of "bar value" was seen with value 1 in FREQ and OHM:
* f2 17 84 21 21 08 00 00 00 64 01 01 17 12 37 02 40 00 7d
* So we keep the test around but accept when it fails.
* - The "gotta beep" activity of continuity/break test mode is not
* available in the packets.
* - The interpretation of range indices depends on the specific mode
* (meter's function, and range when selectable by the user like mV).
* As does the precision of results.
*/
#include "config.h"
#include <ctype.h>
#include <glib.h>
#include <math.h>
#include <string.h>
#include <strings.h>
#include "libsigrok/libsigrok.h"
#include "libsigrok-internal.h"
#define LOG_PREFIX "eev121gw"
/*
* TODO:
* When these bit field extraction helpers move to some common location,
* their names may need adjustment to reduce the potential for conflicts.
*/
// #define BIT(n) (1UL << (n))
#define MASK(len) ((1UL << (len)) - 1)
#define FIELD_PL(v, pos, len) (((v) >> (pos)) & MASK(len))
#define FIELD_NL(v, name) FIELD_PL(v, POS_ ## name, LEN_ ## name)
#define FIELD_NB(v, name) FIELD_PL(v, POS_ ## name, 1)
/*
* Support compile time checks for expected sizeof() results etc, like
* STATIC_ASSERT(sizeof(struct packet) == 19, "packet size");
* Probably should go to some common location.
* See http://www.pixelbeat.org/programming/gcc/static_assert.html for details.
*/
#define ASSERT_CONCAT_(a, b) a ## b
#define ASSERT_CONCAT(a, b) ASSERT_CONCAT_(a, b)
/* These can't be used after statements in c89. */
#ifdef __COUNTER__
#define STATIC_ASSERT(e, m) \
; enum { ASSERT_CONCAT(static_assert_, __COUNTER__) = 1 / (int)(!!(e)) }
#else
/*
* This can't be used twice on the same line so ensure if using in headers
* that the headers are not included twice (by wrapping in #ifndef...#endif).
* Note it doesn't cause an issue when used on same line of separate modules
* compiled with gcc -combine -fwhole-program.
*/
#define STATIC_ASSERT(e, m) \
; enum { ASSERT_CONCAT(assert_line_, __LINE__) = 1 / (int)(!!(e)) }
#endif
/*
* Symbolic identifiers for access to the packet's payload. "Offsets"
* address bytes within the packet. "Positions" specify the (lowest)
* bit number of a field, "lengths" specify the fields' number of bits.
* "Values" specify magic values or fixed content (SBZ, RSV, etc).
*/
enum eev121gw_packet_offs {
OFF_START_CMD,
#define VAL_START_CMD 0xf2
OFF_SERIAL_3,
OFF_SERIAL_2,
OFF_SERIAL_1,
OFF_SERIAL_0,
#define POS_SERIAL_YEAR 24
#define LEN_SERIAL_YEAR 8
#define POS_SERIAL_MONTH 20
#define LEN_SERIAL_MONTH 4
#define POS_SERIAL_NUMBER 0
#define LEN_SERIAL_NUMBER 20
OFF_MAIN_MODE,
#define POS_MAIN_MODE_VAL_U 6
#define LEN_MAIN_MODE_VAL_U 2
#define POS_MAIN_MODE_RSV_5 5
#define POS_MAIN_MODE_MODE 0
#define LEN_MAIN_MODE_MODE 5
OFF_MAIN_RANGE,
#define POS_MAIN_RANGE_OFL 7
#define POS_MAIN_RANGE_SIGN 6
#define POS_MAIN_RANGE_DEGC 5
#define POS_MAIN_RANGE_DEGF 4
#define POS_MAIN_RANGE_RANGE 0
#define LEN_MAIN_RANGE_RANGE 4
OFF_MAIN_VAL_H,
OFF_MAIN_VAL_L,
OFF_SUB_MODE,
#define POS_SUB_MODE_MODE 0
#define LEN_SUB_MODE_MODE 8
OFF_SUB_RANGE,
#define POS_SUB_RANGE_OFL 7
#define POS_SUB_RANGE_SIGN 6
#define POS_SUB_RANGE_K 5
#define POS_SUB_RANGE_HZ 4
#define POS_SUB_RANGE_RSV_3 3
#define POS_SUB_RANGE_POINT 0
#define LEN_SUB_RANGE_POINT 3
OFF_SUB_VAL_H,
OFF_SUB_VAL_L,
OFF_BAR_STATUS,
#define POS_BAR_STATUS_RSV_5 5
#define LEN_BAR_STATUS_RSV_5 3
#define POS_BAR_STATUS_USE 4
#define POS_BAR_STATUS_150 3
#define POS_BAR_STATUS_SIGN 2
#define POS_BAR_STATUS_1K_500 0
#define LEN_BAR_STATUS_1K_500 2
OFF_BAR_VALUE,
#define POS_BAR_VALUE_RSV_6 6
#define LEN_BAR_VALUE_RSV_6 2
#define POS_BAR_VALUE_RSV_5 5
#define POS_BAR_VALUE_VALUE 0
#define LEN_BAR_VALUE_VALUE 5
OFF_ICON_STS_1,
#define POS_ICON_STS1_DEGC 7
#define POS_ICON_STS1_1KHZ 6
#define POS_ICON_STS1_1MSPK 5
#define POS_ICON_STS1_DCAC 3
#define LEN_ICON_STS1_DCAC 2
#define POS_ICON_STS1_AUTO 2
#define POS_ICON_STS1_APO 1
#define POS_ICON_STS1_BAT 0
OFF_ICON_STS_2,
#define POS_ICON_STS2_DEGF 7
#define POS_ICON_STS2_BT 6
#define POS_ICON_STS2_UNK 5 /* TODO: What is this flag? 20mA loop current? */
#define POS_ICON_STS2_REL 4
#define POS_ICON_STS2_DBM 3
#define POS_ICON_STS2_MINMAX 0 /* TODO: How to interpret the 3-bit field? */
#define LEN_ICON_STS2_MINMAX 3
OFF_ICON_STS_3,
#define POS_ICON_STS3_RSV_7 7
#define POS_ICON_STS3_TEST 6
#define POS_ICON_STS3_MEM 4 /* TODO: How to interpret the 2-bit field? */
#define LEN_ICON_STS3_MEM 2
#define POS_ICON_STS3_AHOLD 2
#define LEN_ICON_STS3_AHOLD 2
#define POS_ICON_STS3_AC 1
#define POS_ICON_STS3_DC 0
OFF_CHECKSUM,
/* This is not an offset, but the packet's "byte count". */
PACKET_LAST_OFF,
};
STATIC_ASSERT(PACKET_LAST_OFF == EEV121GW_PACKET_SIZE,
"byte offsets vs packet length mismatch");
enum mode_codes {
/* Modes for 'main' and 'sub' displays. */
MODE_LOW_Z = 0,
MODE_DC_V = 1,
MODE_AC_V = 2,
MODE_DC_MV = 3,
MODE_AC_MV = 4,
MODE_TEMP = 5,
MODE_FREQ = 6,
MODE_PERIOD = 7,
MODE_DUTY = 8,
MODE_RES = 9,
MODE_CONT = 10,
MODE_DIODE = 11,
MODE_CAP = 12,
MODE_AC_UVA = 13,
MODE_AC_MVA = 14,
MODE_AC_VA = 15,
MODE_AC_UA = 16,
MODE_DC_UA = 17,
MODE_AC_MA = 18,
MODE_DC_MA = 19,
MODE_AC_A = 20,
MODE_DC_A = 21,
MODE_DC_UVA = 22,
MODE_DC_MVA = 23,
MODE_DC_VA = 24,
/* More modes for 'sub' display. */
MODE_SUB_TEMPC = 100,
MODE_SUB_TEMPF = 105,
MODE_SUB_BATT = 110,
MODE_SUB_APO_ON = 120,
MODE_SUB_APO_OFF = 125,
MODE_SUB_YEAR = 130,
MODE_SUB_DATE = 135,
MODE_SUB_TIME = 140,
MODE_SUB_B_VOLT = 150,
MODE_SUB_LCD = 160,
MODE_SUB_CONT_PARM_0 = 170,
MODE_SUB_CONT_PARM_1 = 171,
MODE_SUB_CONT_PARM_2 = 172,
MODE_SUB_CONT_PARM_3 = 173,
MODE_SUB_DBM = 180,
MODE_SUB_IVAL = 190,
};
enum range_codes {
RANGE_0,
RANGE_1,
RANGE_2,
RANGE_3,
RANGE_4,
RANGE_5,
RANGE_6,
RANGE_MAX,
};
enum bar_range_codes {
BAR_RANGE_5,
BAR_RANGE_50,
BAR_RANGE_500,
BAR_RANGE_1000,
};
#define BAR_VALUE_MAX 25
enum acdc_codes {
ACDC_NONE,
ACDC_DC,
ACDC_AC,
ACDC_ACDC,
};
SR_PRIV const char *eev121gw_channel_formats[EEV121GW_DISPLAY_COUNT] = {
/*
* TODO:
* The "main", "sub", "bar" names were taken from the packet
* description. Will users prefer "primary", "secondary", and
* "bargraph" names? Or even-length "pri", "sec", "bar" instead?
*/
"main", "sub", "bar",
};
/*
* See page 69 in the 2018-09-24 manual for a table of modes and their
* respective ranges ("Calibration Reference Table"). This is the input
* to get the number of significant digits, and the decimal's position.
*/
struct mode_range_item {
const char *desc; /* Description, for diagnostics. */
int digits; /* Number of significant digits, see @ref sr_analog_encoding. */
int factor; /* Factor to convert the uint to a float. */
};
struct mode_range_items {
size_t range_count;
const struct mode_range_item ranges[RANGE_MAX];
};
static const struct mode_range_items mode_ranges_lowz = {
.range_count = 1,
.ranges = {
{ .desc = "600.0V", .digits = 1, .factor = 1, },
},
};
static const struct mode_range_items mode_ranges_volts = {
.range_count = 4,
.ranges = {
{ .desc = "5.0000V", .digits = 4, .factor = 4, },
{ .desc = "50.000V", .digits = 3, .factor = 3, },
{ .desc = "500.00V", .digits = 2, .factor = 2, },
{ .desc = "600.0V", .digits = 1, .factor = 1, },
},
};
static const struct mode_range_items mode_ranges_millivolts = {
.range_count = 2,
.ranges = {
{ .desc = "50.000mV", .digits = 6, .factor = 6, },
{ .desc = "500.00mV", .digits = 5, .factor = 5, },
},
};
static const struct mode_range_items mode_ranges_temp = {
.range_count = 1,
.ranges = {
{ .desc = "-200.0C ~ 1350.0C", .digits = 1, .factor = 1, },
},
};
static const struct mode_range_items mode_ranges_freq = {
.range_count = 5,
.ranges = {
{ .desc = "99.999Hz", .digits = 3, .factor = 3, },
{ .desc = "999.99Hz", .digits = 2, .factor = 2, },
{ .desc = "9.9999kHz", .digits = 1, .factor = 1, },
{ .desc = "99.999kHz", .digits = 0, .factor = 0, },
{ .desc = "999.99kHz", .digits = -1, .factor = -1, },
},
};
static const struct mode_range_items mode_ranges_period = {
.range_count = 3,
.ranges = {
{ .desc = "9.9999ms", .digits = 7, .factor = 7, },
{ .desc = "99.999ms", .digits = 6, .factor = 6, },
{ .desc = "999.99ms", .digits = 5, .factor = 5, },
},
};
static const struct mode_range_items mode_ranges_duty = {
.range_count = 1,
.ranges = {
{ .desc = "99.9%", .digits = 1, .factor = 1, },
},
};
static const struct mode_range_items mode_ranges_res = {
.range_count = 7,
.ranges = {
{ .desc = "50.000R", .digits = 3, .factor = 3, },
{ .desc = "500.00R", .digits = 2, .factor = 2, },
{ .desc = "5.0000k", .digits = 1, .factor = 1, },
{ .desc = "50.000k", .digits = 0, .factor = 0, },
{ .desc = "500.00k", .digits = -1, .factor = -1, },
{ .desc = "5.0000M", .digits = -2, .factor = -2, },
{ .desc = "50.000M", .digits = -3, .factor = -3, },
},
};
static const struct mode_range_items mode_ranges_cont = {
.range_count = 1,
.ranges = {
{ .desc = "500.00R", .digits = 2, .factor = 2, },
},
};
static const struct mode_range_items mode_ranges_diode = {
.range_count = 2,
.ranges = {
{ .desc = "3.0000V", .digits = 4, .factor = 4, },
{ .desc = "15.000V", .digits = 3, .factor = 3, },
},
};
static const struct mode_range_items mode_ranges_cap = {
.range_count = 6,
.ranges = {
{ .desc = "10.00n", .digits = 11, .factor = 11, },
{ .desc = "100.0n", .digits = 10, .factor = 10, },
{ .desc = "1.000u", .digits = 9, .factor = 9, },
{ .desc = "10.00u", .digits = 8, .factor = 8, },
{ .desc = "100.0u", .digits = 7, .factor = 7, },
{ .desc = "10.00m", .digits = 5, .factor = 5, },
},
};
static const struct mode_range_items mode_ranges_pow_va = {
.range_count = 4,
.ranges = {
{ .desc = "2500.0mVA", .digits = 4, .factor = 4, },
{ .desc = "25000.mVA", .digits = 3, .factor = 3, },
{ .desc = "25.000VA", .digits = 3, .factor = 3, },
{ .desc = "500.00VA", .digits = 2, .factor = 2, },
},
};
static const struct mode_range_items mode_ranges_pow_mva = {
.range_count = 4,
.ranges = {
{ .desc = "25.000mVA", .digits = 6, .factor = 6, },
{ .desc = "250.00mVA", .digits = 5, .factor = 5, },
{ .desc = "250.00mVA", .digits = 5, .factor = 5, },
{ .desc = "2500.0mVA", .digits = 4, .factor = 4, },
},
};
static const struct mode_range_items mode_ranges_pow_uva = {
.range_count = 4,
.ranges = {
{ .desc = "250.00uVA", .digits = 8, .factor = 8, },
{ .desc = "2500.0uVA", .digits = 7, .factor = 7, },
{ .desc = "2500.0uVA", .digits = 7, .factor = 7, },
{ .desc = "25000.uVA", .digits = 6, .factor = 6, },
},
};
static const struct mode_range_items mode_ranges_curr_a = {
.range_count = 3,
.ranges = {
{ .desc = "500.00mA", .digits = 5, .factor = 5, },
{ .desc = "5.0000A", .digits = 4, .factor = 4, },
{ .desc = "10.000A", .digits = 3, .factor = 3, },
},
};
static const struct mode_range_items mode_ranges_curr_ma = {
.range_count = 2,
.ranges = {
{ .desc = "5.0000mA", .digits = 7, .factor = 7, },
{ .desc = "50.000mA", .digits = 6, .factor = 6, },
},
};
static const struct mode_range_items mode_ranges_curr_ua = {
.range_count = 2,
.ranges = {
{ .desc = "50.000uA", .digits = 9, .factor = 9, },
{ .desc = "500.00uA", .digits = 8, .factor = 8, },
},
};
static const struct mode_range_items *mode_ranges_main[] = {
[MODE_LOW_Z] = &mode_ranges_lowz,
[MODE_DC_V] = &mode_ranges_volts,
[MODE_AC_V] = &mode_ranges_volts,
[MODE_DC_MV] = &mode_ranges_millivolts,
[MODE_AC_MV] = &mode_ranges_millivolts,
[MODE_TEMP] = &mode_ranges_temp,
[MODE_FREQ] = &mode_ranges_freq,
[MODE_PERIOD] = &mode_ranges_period,
[MODE_DUTY] = &mode_ranges_duty,
[MODE_RES] = &mode_ranges_res,
[MODE_CONT] = &mode_ranges_cont,
[MODE_DIODE] = &mode_ranges_diode,
[MODE_CAP] = &mode_ranges_cap,
[MODE_DC_VA] = &mode_ranges_pow_va,
[MODE_AC_VA] = &mode_ranges_pow_va,
[MODE_DC_MVA] = &mode_ranges_pow_mva,
[MODE_AC_MVA] = &mode_ranges_pow_mva,
[MODE_DC_UVA] = &mode_ranges_pow_uva,
[MODE_AC_UVA] = &mode_ranges_pow_uva,
[MODE_DC_A] = &mode_ranges_curr_a,
[MODE_AC_A] = &mode_ranges_curr_a,
[MODE_DC_MA] = &mode_ranges_curr_ma,
[MODE_AC_MA] = &mode_ranges_curr_ma,
[MODE_DC_UA] = &mode_ranges_curr_ua,
[MODE_AC_UA] = &mode_ranges_curr_ua,
};
/*
* The secondary display encodes SI units / scaling differently from the
* main display, and fewer ranges are available. So we share logic between
* displays for scaling, but have to keep separate tables for the displays.
*/
static const struct mode_range_items mode_ranges_temp_sub = {
.range_count = 2,
.ranges = {
[1] = { .desc = "sub 100.0C", .digits = 1, .factor = 1, },
},
};
static const struct mode_range_items mode_ranges_freq_sub = {
.range_count = 4,
.ranges = {
[1] = { .desc = "999.9Hz", .digits = 1, .factor = 1, },
[2] = { .desc = "99.99Hz", .digits = 2, .factor = 2, },
[3] = { .desc = "9.999kHz", .digits = 3, .factor = 3, },
},
};
static const struct mode_range_items mode_ranges_batt_sub = {
.range_count = 2,
.ranges = {
[1] = { .desc = "sub 10.0V", .digits = 1, .factor = 1, },
},
};
static const struct mode_range_items mode_ranges_gain_sub = {
.range_count = 4,
.ranges = {
[1] = { .desc = "dbm 5000.0dBm", .digits = 1, .factor = 1, },
[2] = { .desc = "dbm 500.00dBm", .digits = 2, .factor = 2, },
[3] = { .desc = "dbm 50.000dBm", .digits = 3, .factor = 3, },
},
};
static const struct mode_range_items mode_ranges_diode_sub = {
.range_count = 1,
.ranges = {
[0] = { .desc = "diode 15.0V", .digits = 0, .factor = 0, },
},
};
/* TODO: Complete the list of ranges. Only tested with low voltages so far. */
static const struct mode_range_items mode_ranges_volts_sub = {
.range_count = 5,
.ranges = {
[4] = { .desc = "5.0000V", .digits = 4, .factor = 4, },
},
};
/* TODO: Complete the list of ranges. Only tested with low voltages so far. */
static const struct mode_range_items mode_ranges_mamps_sub = {
.range_count = 3,
.ranges = {
[2] = { .desc = "500.00mA", .digits = 5, .factor = 5, },
},
};
static const struct mode_range_items *mode_ranges_sub[] = {
[MODE_DC_V] = &mode_ranges_volts_sub,
[MODE_AC_V] = &mode_ranges_volts_sub,
[MODE_DC_A] = &mode_ranges_mamps_sub,
[MODE_AC_A] = &mode_ranges_mamps_sub,
[MODE_FREQ] = &mode_ranges_freq_sub,
[MODE_DIODE] = &mode_ranges_diode_sub,
[MODE_SUB_TEMPC] = &mode_ranges_temp_sub,
[MODE_SUB_TEMPF] = &mode_ranges_temp_sub,
[MODE_SUB_BATT] = &mode_ranges_batt_sub,
[MODE_SUB_DBM] = &mode_ranges_gain_sub,
};
static const struct mode_range_item *mode_range_get_scale(
enum eev121gw_display display,
enum mode_codes mode, enum range_codes range)
{
const struct mode_range_items *items;
const struct mode_range_item *item;
if (display == EEV121GW_DISPLAY_MAIN) {
if (mode >= ARRAY_SIZE(mode_ranges_main))
return NULL;
items = mode_ranges_main[mode];
if (!items || !items->range_count)
return NULL;
if (range >= items->range_count)
return NULL;
item = &items->ranges[range];
return item;
}
if (display == EEV121GW_DISPLAY_SUB) {
if (mode >= ARRAY_SIZE(mode_ranges_sub))
return NULL;
items = mode_ranges_sub[mode];
if (!items || !items->range_count)
return NULL;
if (range >= items->range_count)
return NULL;
item = &items->ranges[range];
if (!item->desc || !*item->desc)
return NULL;
return item;
}
return NULL;
}
SR_PRIV gboolean sr_eev121gw_packet_valid(const uint8_t *buf)
{
uint8_t csum;
size_t idx;
/* Leading byte, literal / fixed value. */
if (buf[OFF_START_CMD] != VAL_START_CMD)
return FALSE;
/* Check some always-zero bits in reserved locations. */
if (FIELD_NB(buf[OFF_MAIN_MODE], MAIN_MODE_RSV_5))
return FALSE;
if (FIELD_NB(buf[OFF_SUB_RANGE], SUB_RANGE_RSV_3))
return FALSE;
if (FIELD_NL(buf[OFF_BAR_STATUS], BAR_STATUS_RSV_5))
return FALSE;
if (FIELD_NL(buf[OFF_BAR_VALUE], BAR_VALUE_RSV_6))
return FALSE;
/* See TODO for bit 5 of "bar value" not always being 0. */
if (0 && FIELD_NB(buf[OFF_BAR_VALUE], BAR_VALUE_RSV_5))
return FALSE;
if (FIELD_NB(buf[OFF_ICON_STS_3], ICON_STS3_RSV_7))
return FALSE;
/* Checksum, XOR over all previous bytes. */
csum = 0x00;
for (idx = OFF_START_CMD; idx < OFF_CHECKSUM; idx++)
csum ^= buf[idx];
if (csum != buf[OFF_CHECKSUM]) {
/* Non-critical condition, almost expected to see invalid data. */
sr_spew("Packet csum: want %02x, got %02x.", csum, buf[OFF_CHECKSUM]);
return FALSE;
}
sr_spew("Packet valid.");
return TRUE;
}
/**
* Parse a protocol packet.
*
* @param[in] buf Buffer containing the protocol packet. Must not be NULL.
* @param[out] floatval Pointer to a float variable. That variable will be
* modified in-place depending on the protocol packet.
* Must not be NULL.
* @param[out] analog Pointer to a struct sr_datafeed_analog. The struct will
* be filled with data according to the protocol packet.
* Must not be NULL.
* @param[out] info Pointer to a struct eevblog_121gw_info. The struct will be
* filled with data according to the protocol packet.
* Must not be NULL.
*
* @return SR_OK upon success, SR_ERR upon failure. Upon errors, the
* 'analog' variable contents are undefined and should not be used.
*/
SR_PRIV int sr_eev121gw_parse(const uint8_t *buf, float *floatval,
struct sr_datafeed_analog *analog, void *info)
{
struct eev121gw_info *info_local;
enum eev121gw_display display;
const char *channel_name;
uint32_t raw_serial;
uint8_t raw_main_mode, raw_main_range;
uint16_t raw_main_value;
uint8_t raw_sub_mode, raw_sub_range;
uint16_t raw_sub_value;
uint8_t raw_bar_status, raw_bar_value;
uint8_t raw_icon_stat_1, raw_icon_stat_2, raw_icon_stat_3;
uint32_t uint_value;
enum mode_codes main_mode;
enum range_codes main_range;
enum mode_codes sub_mode;
enum range_codes sub_range;
const struct mode_range_item *scale;
gboolean is_dc, is_sign, use_sign;
gboolean is_k;
unsigned int cont_code;
info_local = info;
display = info_local->ch_idx;
channel_name = eev121gw_channel_formats[display];
memset(info_local, 0, sizeof(*info_local));
*floatval = 0.0f;
/*
* Get the packet's bytes into native C language typed variables.
* This keeps byte position references out of logic/calculations.
* The start command and CRC were verified before we get here.
*/
raw_serial = RB32(&buf[OFF_SERIAL_3]);
raw_main_mode = R8(&buf[OFF_MAIN_MODE]);
raw_main_range = R8(&buf[OFF_MAIN_RANGE]);
raw_main_value = RB16(&buf[OFF_MAIN_VAL_H]);
raw_sub_mode = R8(&buf[OFF_SUB_MODE]);
raw_sub_range = R8(&buf[OFF_SUB_RANGE]);
raw_sub_value = RB16(&buf[OFF_SUB_VAL_H]);
raw_bar_status = R8(&buf[OFF_BAR_STATUS]);
raw_bar_value = R8(&buf[OFF_BAR_VALUE]);
raw_icon_stat_1 = R8(&buf[OFF_ICON_STS_1]);
raw_icon_stat_2 = R8(&buf[OFF_ICON_STS_2]);
raw_icon_stat_3 = R8(&buf[OFF_ICON_STS_3]);
/*
* Packets contain a YEAR-MONTH date spec. It's uncertain how
* this data relates to the device's production or the firmware
* version. It certainly is not the current date either. Only
* optionally log this information, it's consistent across all
* packets (won't change within a session), and will be noisy if
* always enabled.
*
* Packets also contain a user adjustable device identification
* number (see the SETUP options). This is motivated by support
* for multiple devices, but won't change here within a session.
* The user chose to communicate to one specific device when the
* session started, by means of the conn= spec.
*
* It was suggested that this 'serial' field might be used as an
* additional means to check for a packet's validity (or absence
* of communication errors). This remains as an option for future
* improvement.
*/
if (0) {
unsigned int ser_year, ser_mon, ser_nr;
ser_year = FIELD_NL(raw_serial, SERIAL_YEAR);
ser_mon = FIELD_NL(raw_serial, SERIAL_MONTH);
ser_nr = FIELD_NL(raw_serial, SERIAL_NUMBER);
sr_spew("Packet: Y-M %x-%x, nr %x.", ser_year, ser_mon, ser_nr);
}
switch (display) {
case EEV121GW_DISPLAY_MAIN:
/*
* Get those fields which correspond to the main display.
* The value's mantissa has 18 bits. The sign is separate
* (and is not universally applicable, mode needs to get
* inspected). The range's scaling and precision also
* depend on the mode.
*/
main_mode = FIELD_NL(raw_main_mode, MAIN_MODE_MODE);
main_range = FIELD_NL(raw_main_range, MAIN_RANGE_RANGE);
scale = mode_range_get_scale(EEV121GW_DISPLAY_MAIN,
main_mode, main_range);
if (!scale)
return SR_ERR_NA;
info_local->factor = scale->factor;
info_local->digits = scale->digits;
uint_value = raw_main_value;
uint_value |= FIELD_NL(raw_main_mode, MAIN_MODE_VAL_U) << 16;
info_local->uint_value = uint_value;
info_local->is_ofl = FIELD_NB(raw_main_range, MAIN_RANGE_OFL);
switch (main_mode) {
case MODE_LOW_Z:
is_dc = FALSE;
if (FIELD_NB(raw_icon_stat_3, ICON_STS3_DC))
is_dc = TRUE;
if (FIELD_NB(raw_icon_stat_3, ICON_STS3_AC))
is_dc = FALSE;
use_sign = is_dc;
break;
case MODE_DC_V:
case MODE_DC_MV:
case MODE_TEMP:
case MODE_DC_UVA:
case MODE_DC_MVA:
case MODE_DC_VA:
case MODE_DC_UA:
case MODE_DC_MA:
case MODE_DC_A:
use_sign = TRUE;
break;
default:
use_sign = FALSE;
break;
}
if (use_sign) {
is_sign = FIELD_NB(raw_main_range, MAIN_RANGE_SIGN);
info_local->is_neg = is_sign;
}
switch (main_mode) {
case MODE_LOW_Z:
info_local->is_voltage = TRUE;
/* TODO: Need to determine AC/DC here? */
info_local->is_volt = TRUE;
info_local->is_low_pass = TRUE;
break;
case MODE_DC_V:
info_local->is_voltage = TRUE;
info_local->is_dc = TRUE;
info_local->is_volt = TRUE;
break;
case MODE_AC_V:
info_local->is_voltage = TRUE;
info_local->is_volt = TRUE;
info_local->is_ac = TRUE;
break;
case MODE_DC_MV:
info_local->is_voltage = TRUE;
info_local->is_dc = TRUE;
info_local->is_volt = TRUE;
break;
case MODE_AC_MV:
info_local->is_voltage = TRUE;
info_local->is_volt = TRUE;
info_local->is_ac = TRUE;
break;
case MODE_TEMP:
info_local->is_temperature = TRUE;
if (FIELD_NB(raw_main_range, MAIN_RANGE_DEGC))
info_local->is_celsius = TRUE;
if (FIELD_NB(raw_main_range, MAIN_RANGE_DEGF))
info_local->is_fahrenheit = TRUE;
break;
case MODE_FREQ:
info_local->is_frequency = TRUE;
info_local->is_hertz = TRUE;
break;
case MODE_PERIOD:
info_local->is_period = TRUE;
info_local->is_seconds = TRUE;
break;
case MODE_DUTY:
info_local->is_duty_cycle = TRUE;
info_local->is_percent = TRUE;
break;
case MODE_RES:
info_local->is_resistance = TRUE;
info_local->is_ohm = TRUE;
break;
case MODE_CONT:
info_local->is_continuity = TRUE;
info_local->is_ohm = TRUE;
/*
* In continuity mode the packet provides the
* resistance in ohms (500R range), but seems to
* _not_ carry the "boolean" open/closed state
* which controls the beeper. Users can select
* whether to trigger at 30R or 300R, and whether
* to trigger on values below (continuity) or
* above (cable break) the limit, but we cannot
* tell what the currently used setting is. So
* we neither get the beeper's state, nor can we
* derive it from other information.
*/
break;
case MODE_DIODE:
info_local->is_diode = TRUE;
info_local->is_dc = TRUE;
info_local->is_volt = TRUE;
break;
case MODE_CAP:
info_local->is_capacitance = TRUE;
info_local->is_farad = TRUE;
break;
case MODE_AC_UVA:
info_local->is_power = TRUE;
info_local->is_ac = TRUE;
info_local->is_volt_ampere = TRUE;
break;
case MODE_AC_MVA:
info_local->is_power = TRUE;
info_local->is_ac = TRUE;
info_local->is_volt_ampere = TRUE;
break;
case MODE_AC_VA:
info_local->is_power = TRUE;
info_local->is_ac = TRUE;
info_local->is_volt_ampere = TRUE;
break;
case MODE_AC_UA:
info_local->is_current = TRUE;
info_local->is_ac = TRUE;
info_local->is_ampere = TRUE;
break;
case MODE_DC_UA:
info_local->is_current = TRUE;
info_local->is_dc = TRUE;
info_local->is_ampere = TRUE;
break;
case MODE_AC_MA:
info_local->is_current = TRUE;
info_local->is_ac = TRUE;
info_local->is_ampere = TRUE;
break;
case MODE_DC_MA:
info_local->is_current = TRUE;
info_local->is_dc = TRUE;
info_local->is_ampere = TRUE;
break;
case MODE_AC_A:
info_local->is_current = TRUE;
info_local->is_ac = TRUE;
info_local->is_ampere = TRUE;
break;
case MODE_DC_A:
info_local->is_current = TRUE;
info_local->is_dc = TRUE;
info_local->is_ampere = TRUE;
break;
case MODE_DC_UVA:
info_local->is_power = TRUE;
info_local->is_dc = TRUE;
info_local->is_volt_ampere = TRUE;
break;
case MODE_DC_MVA:
info_local->is_power = TRUE;
info_local->is_dc = TRUE;
info_local->is_volt_ampere = TRUE;
break;
case MODE_DC_VA:
info_local->is_power = TRUE;
info_local->is_dc = TRUE;
info_local->is_volt_ampere = TRUE;
break;
/* Modes 100-199 only apply to the secondary display. */
default:
return SR_ERR_NA;
}
/*
* Inspect the "icons" section, since it is associated
* with the primary display and global device state.
*/
if (FIELD_NB(raw_icon_stat_1, ICON_STS1_1KHZ))
info_local->is_low_pass = TRUE;
if (FIELD_NB(raw_icon_stat_1, ICON_STS1_1MSPK))
info_local->is_1ms_peak = TRUE;
switch (FIELD_NL(raw_icon_stat_1, ICON_STS1_DCAC)) {
case ACDC_ACDC:
info_local->is_ac = TRUE;
info_local->is_dc = TRUE;
break;
case ACDC_AC:
info_local->is_ac = TRUE;
break;
case ACDC_DC:
info_local->is_dc = TRUE;
break;
case ACDC_NONE:
/* EMPTY */
break;
}
if (FIELD_NB(raw_icon_stat_1, ICON_STS1_AUTO))
info_local->is_auto_range = TRUE;
if (FIELD_NB(raw_icon_stat_1, ICON_STS1_APO))
info_local->is_auto_poweroff = TRUE;
if (FIELD_NB(raw_icon_stat_1, ICON_STS1_BAT))
info_local->is_low_batt = TRUE;
if (FIELD_NB(raw_icon_stat_2, ICON_STS2_BT))
info_local->is_bt = TRUE;
/* TODO: Is this the "20mA loop current" flag? */
if (FIELD_NB(raw_icon_stat_2, ICON_STS2_UNK))
info_local->is_loop_current = TRUE;
if (FIELD_NB(raw_icon_stat_2, ICON_STS2_REL))
info_local->is_rel = TRUE;
/* dBm only applies to secondary display, not main. */
switch (FIELD_NL(raw_icon_stat_2, ICON_STS2_MINMAX)) {
/* TODO: Do inspect the min/max/avg flags. */
default:
/* EMPTY */
break;
}
if (FIELD_NB(raw_icon_stat_3, ICON_STS3_TEST))
info_local->is_test = TRUE;
/* TODO: How to interpret the 2-bit MEM field? */
if (FIELD_NL(raw_icon_stat_3, ICON_STS3_MEM))
info_local->is_mem = TRUE;
if (FIELD_NL(raw_icon_stat_3, ICON_STS3_AHOLD))
info_local->is_hold = TRUE;
/* TODO: Are these for the secondary display? See status-2 ACDC. */
if (FIELD_NB(raw_icon_stat_3, ICON_STS3_AC))
info_local->is_ac = TRUE;
if (FIELD_NB(raw_icon_stat_3, ICON_STS3_DC))
info_local->is_dc = TRUE;
sr_spew("Disp '%s', value: %lu (ov %d, neg %d), mode %d, range %d.",
channel_name,
(unsigned long)info_local->uint_value,
info_local->is_ofl, info_local->is_neg,
(int)main_mode, (int)main_range);
/* Advance to the number and units conversion below. */
break;
case EEV121GW_DISPLAY_SUB:
/*
* Get those fields which correspond to the secondary
* display. The value's mantissa has 16 bits. The sign
* is separate is only applies to some of the modes.
* Scaling and precision also depend on the mode. The
* interpretation of the secondary display is different
* from the main display: The 'range' is not an index
* into ranges, instead it's the decimal's position.
* Yet more scaling depends on the mode, to complicate
* matters. The secondary display uses modes 100-199,
* and some of the 0-24 modes as well.
*/
sub_mode = FIELD_NL(raw_sub_mode, SUB_MODE_MODE);
sub_range = FIELD_NL(raw_sub_range, SUB_RANGE_POINT);
scale = mode_range_get_scale(EEV121GW_DISPLAY_SUB,
sub_mode, sub_range);
if (!scale)
return SR_ERR_NA;
info_local->factor = scale->factor;
info_local->digits = scale->digits;
info_local->uint_value = raw_sub_value;
info_local->is_ofl = FIELD_NB(raw_sub_range, SUB_RANGE_OFL);
switch (sub_mode) {
case MODE_DC_V:
case MODE_AC_V:
case MODE_DC_A:
case MODE_AC_A:
case MODE_SUB_TEMPC:
case MODE_SUB_TEMPF:
case MODE_SUB_B_VOLT:
case MODE_SUB_DBM:
use_sign = TRUE;
break;
default:
use_sign = FALSE;
break;
}
if (use_sign) {
is_sign = FIELD_NB(raw_sub_range, SUB_RANGE_SIGN);
info_local->is_neg = is_sign;
}
is_k = FIELD_NB(raw_sub_range, SUB_RANGE_K);
/*
* TODO: Re-check the power mode display as more data becomes
* available.
*
* The interpretation of the secondary display in power (VA)
* modes is uncertain. The mode suggests A or uA units but the
* value is supposed to be mA without a reliable condition
* for us to check...
*
* f2 17 84 21 21 18 02 00 00 01 04 00 0b 00 00 0a 40 00 3f
* f2 17 84 21 21 18 02 00 00 15 03 00 00 00 00 0a 40 00 27
* DC VA DC V / DC A
* 25.000VA dot 4 / dot 3
*
* f2 17 84 21 21 18 00 00 26 01 04 4c 57 00 00 0e 40 00 0f
* f2 17 84 21 21 18 00 00 26 15 02 00 c7 00 00 0e 40 00 c1
* 3.8mVA DC 1.9543V
* 1.98mA (!) DC A + dot 2 -> milli(!) amps?
*
* f2 17 84 21 21 17 00 07 85 01 04 4c 5a 00 00 0e 40 00 a9
* f2 17 84 21 21 17 00 07 85 13 04 26 7b 00 00 0e 40 00 f0
* 1.925mVA DC 1.9546V
* 0.9852mA
*
* f2 17 84 21 21 16 02 11 e0 01 04 26 39 00 02 0e 40 00 d2
* f2 17 84 21 21 16 02 11 e0 11 04 12 44 00 02 0e 40 00 8b
* 457.6uVA DC 0.9785V
* 0.4676mA (!) DC uA + dot 4 -> milli(!) amps?
*/
switch (sub_mode) {
case MODE_DC_V:
info_local->is_voltage = TRUE;
info_local->is_volt = TRUE;
break;
case MODE_DC_A:
info_local->is_current = TRUE;
info_local->is_ampere = TRUE;
break;
case MODE_FREQ:
info_local->is_frequency = TRUE;
info_local->is_hertz = TRUE;
if (is_k) {
info_local->factor -= 3;
info_local->digits -= 3;
}
info_local->is_ofl = FALSE;
break;
case MODE_SUB_TEMPC:
info_local->is_temperature = TRUE;
info_local->is_celsius = TRUE;
break;
case MODE_SUB_TEMPF:
info_local->is_temperature = TRUE;
info_local->is_fahrenheit = TRUE;
break;
case MODE_SUB_BATT:
/* TODO: How to communicate it's the *battery* voltage? */
info_local->is_voltage = TRUE;
info_local->is_volt = TRUE;
break;
case MODE_SUB_DBM:
info_local->is_gain = TRUE;
info_local->is_dbm = TRUE;
break;
case MODE_SUB_CONT_PARM_0:
case MODE_SUB_CONT_PARM_1:
case MODE_SUB_CONT_PARM_2:
case MODE_SUB_CONT_PARM_3:
/*
* These "continuity parameters" are special. The
* least significant bits represent the options:
*
* 0xaa = 170 => down 30
* 0xab = 171 => up 30
* 0xac = 172 => down 300
* 0xad = 173 => up 300
*
* bit 0 value 0 -> close (cont)
* bit 0 value 1 -> open (break)
* bit 1 value 0 -> 30R limit
* bit 1 value 1 -> 300R limit
*
* This "display value" is only seen during setup
* but not during regular operation of continuity
* mode. :( In theory we could somehow pass the
* 30/300 ohm limit to sigrok, but that'd be of
* somewhat limited use.
*/
cont_code = sub_mode - MODE_SUB_CONT_PARM_0;
info_local->is_resistance = TRUE;
info_local->is_ohm = TRUE;
info_local->uint_value = (cont_code & 0x02) ? 300 : 30;
info_local->is_neg = FALSE;
info_local->is_ofl = FALSE;
info_local->factor = 0;
info_local->digits = 0;
break;
case MODE_DIODE:
/* Displays configured diode test voltage. */
info_local->is_voltage = TRUE;
info_local->is_volt = TRUE;
break;
/* Reflecting these to users seems pointless, ignore them. */
case MODE_SUB_APO_ON:
case MODE_SUB_APO_OFF:
case MODE_SUB_LCD:
case MODE_SUB_YEAR:
case MODE_SUB_DATE:
case MODE_SUB_TIME:
return SR_ERR_NA;
/* Unknown / unsupported sub display mode. */
default:
return SR_ERR_NA;
}
sr_spew("disp '%s', value: %lu (ov %d, neg %d), mode %d, range %d",
channel_name,
(unsigned long)info_local->uint_value,
info_local->is_ofl, info_local->is_neg,
(int)sub_mode, (int)sub_range);
/* Advance to the number and units conversion below. */
break;
case EEV121GW_DISPLAY_BAR:
/*
* Get those fields which correspond to the bargraph.
* There are 26 segments (ticks 0-25), several ranges
* apply (up to 5, or up to 10, several decades). The
* bargraph does not apply to all modes and ranges,
* hence there is a "use" flag (negative logic, blank
* signal). Bit 5 was also found to have undocumented
* values, we refuse to use the bargraph value then.
*/
if (FIELD_NB(raw_bar_status, BAR_STATUS_USE))
return SR_ERR_NA;
if (FIELD_NB(raw_bar_value, BAR_VALUE_RSV_5))
return SR_ERR_NA;
uint_value = FIELD_NL(raw_bar_value, BAR_VALUE_VALUE);
if (uint_value > BAR_VALUE_MAX)
uint_value = BAR_VALUE_MAX;
info_local->is_neg = FIELD_NB(raw_bar_status, BAR_STATUS_SIGN);
switch (FIELD_NL(raw_bar_status, BAR_STATUS_1K_500)) {
case BAR_RANGE_5:
/* Full range 5.0, in steps of 0.2 each. */
uint_value *= 5000 / BAR_VALUE_MAX;
info_local->factor = 3;
info_local->digits = 1;
break;
case BAR_RANGE_50:
/* Full range 50, in steps of 2 each. */
uint_value *= 50 / BAR_VALUE_MAX;
info_local->factor = 0;
info_local->digits = 0;
break;
case BAR_RANGE_500:
/* Full range 500, in steps of 20 each. */
uint_value *= 500 / BAR_VALUE_MAX;
info_local->factor = 0;
info_local->digits = -1;
break;
case BAR_RANGE_1000:
/* Full range 1000, in steps of 40 each. */
uint_value *= 1000 / BAR_VALUE_MAX;
info_local->factor = 0;
info_local->digits = -1;
break;
default:
return SR_ERR_NA;
}
info_local->uint_value = uint_value;
info_local->is_unitless = TRUE;
sr_spew("Disp '%s', value: %u.", channel_name,
(unsigned int)info_local->uint_value);
/* Advance to the number and units conversion below. */
break;
default:
/* Unknown display, programmer's error, ShouldNotHappen(TM). */
sr_err("Disp '-?-'.");
return SR_ERR_ARG;
}
/*
* Convert the unsigned mantissa and its modifiers to a float
* analog value, including scale and quantity. Do the conversion
* first, and optionally override the result with 'inf' later.
* Apply the sign last so that +inf and -inf are supported.
*/
*floatval = info_local->uint_value;
if (info_local->factor)
*floatval *= powf(10, -info_local->factor);
if (info_local->is_ofl)
*floatval = INFINITY;
if (info_local->is_neg)
*floatval = -*floatval;
analog->encoding->digits = info_local->digits;
analog->spec->spec_digits = info_local->digits;
/*
* Communicate the measured quantity.
*/
/* Determine the quantity itself. */
if (info_local->is_voltage)
analog->meaning->mq = SR_MQ_VOLTAGE;
if (info_local->is_current)
analog->meaning->mq = SR_MQ_CURRENT;
if (info_local->is_power)
analog->meaning->mq = SR_MQ_POWER;
if (info_local->is_gain)
analog->meaning->mq = SR_MQ_GAIN;
if (info_local->is_resistance)
analog->meaning->mq = SR_MQ_RESISTANCE;
if (info_local->is_capacitance)
analog->meaning->mq = SR_MQ_CAPACITANCE;
if (info_local->is_diode)
analog->meaning->mq = SR_MQ_VOLTAGE;
if (info_local->is_temperature)
analog->meaning->mq = SR_MQ_TEMPERATURE;
if (info_local->is_continuity)
analog->meaning->mq = SR_MQ_CONTINUITY;
if (info_local->is_frequency)
analog->meaning->mq = SR_MQ_FREQUENCY;
if (info_local->is_period)
analog->meaning->mq = SR_MQ_TIME;
if (info_local->is_duty_cycle)
analog->meaning->mq = SR_MQ_DUTY_CYCLE;
if (info_local->is_unitless)
analog->meaning->mq = SR_MQ_COUNT;
/* Add AC / DC / DC+AC flags. */
if (info_local->is_ac)
analog->meaning->mqflags |= SR_MQFLAG_AC;
if (info_local->is_dc)
analog->meaning->mqflags |= SR_MQFLAG_DC;
/* Specify units. */
if (info_local->is_ampere)
analog->meaning->unit = SR_UNIT_AMPERE;
if (info_local->is_volt)
analog->meaning->unit = SR_UNIT_VOLT;
if (info_local->is_volt_ampere)
analog->meaning->unit = SR_UNIT_VOLT_AMPERE;
if (info_local->is_dbm)
analog->meaning->unit = SR_UNIT_DECIBEL_VOLT;
if (info_local->is_ohm)
analog->meaning->unit = SR_UNIT_OHM;
if (info_local->is_farad)
analog->meaning->unit = SR_UNIT_FARAD;
if (info_local->is_celsius)
analog->meaning->unit = SR_UNIT_CELSIUS;
if (info_local->is_fahrenheit)
analog->meaning->unit = SR_UNIT_FAHRENHEIT;
if (info_local->is_hertz)
analog->meaning->unit = SR_UNIT_HERTZ;
if (info_local->is_seconds)
analog->meaning->unit = SR_UNIT_SECOND;
if (info_local->is_percent)
analog->meaning->unit = SR_UNIT_PERCENTAGE;
if (info_local->is_loop_current)
analog->meaning->unit = SR_UNIT_PERCENTAGE;
if (info_local->is_unitless)
analog->meaning->unit = SR_UNIT_UNITLESS;
if (info_local->is_logic)
analog->meaning->unit = SR_UNIT_UNITLESS;
/* Add other indicator flags. */
if (info_local->is_diode) {
analog->meaning->mqflags |= SR_MQFLAG_DIODE;
analog->meaning->mqflags |= SR_MQFLAG_DC;
}
if (info_local->is_min)
analog->meaning->mqflags |= SR_MQFLAG_MIN;
if (info_local->is_max)
analog->meaning->mqflags |= SR_MQFLAG_MAX;
if (info_local->is_avg)
analog->meaning->mqflags |= SR_MQFLAG_AVG;
/* TODO: How to communicate info_local->is_1ms_peak? */
if (info_local->is_rel)
analog->meaning->mqflags |= SR_MQFLAG_RELATIVE;
if (info_local->is_hold)
analog->meaning->mqflags |= SR_MQFLAG_HOLD;
/* TODO: How to communicate info_local->is_low_pass? */
if (info_local->is_mem) /* XXX Is REF appropriate here? */
analog->meaning->mqflags |= SR_MQFLAG_REFERENCE;
if (info_local->is_auto_range)
analog->meaning->mqflags |= SR_MQFLAG_AUTORANGE;
/* TODO: How to communicate info->is_test? What's its meaning at all? */
/* TODO: How to communicate info->is_auto_poweroff? */
/* TODO: How to communicate info->is_low_batt? */
return SR_OK;
}
/*
* Parse the same packet multiple times, to extract individual analog
* values which correspond to several displays of the device. Make sure
* to keep the channel index in place, even if the parse routine will
* clear the info structure.
*/
SR_PRIV int sr_eev121gw_3displays_parse(const uint8_t *buf, float *floatval,
struct sr_datafeed_analog *analog, void *info)
{
struct eev121gw_info *info_local;
size_t ch_idx;
int rc;
info_local = info;
ch_idx = info_local->ch_idx;
rc = sr_eev121gw_parse(buf, floatval, analog, info);
info_local->ch_idx = ch_idx + 1;
return rc;
}
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