projects / libsigrok.git / blame
| Commit | Line | Data |
|---|---|---|
| 825da8b2 MH |
1 | /* |
| 2 | * This file is part of the libsigrok project. | |
| 3 | * | |
| 4 | * Copyright (C) 2013 Matthias Heidbrink <m-sigrok@heidbrink.biz> | |
| 5 | * | |
| 6 | * This program is free software: you can redistribute it and/or modify | |
| 7 | * it under the terms of the GNU General Public License as published by | |
| 8 | * the Free Software Foundation, either version 3 of the License, or | |
| 9 | * (at your option) any later version. | |
| 10 | * | |
| 11 | * This program is distributed in the hope that it will be useful, | |
| 12 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
| 13 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
| 14 | * GNU General Public License for more details. | |
| 15 | * | |
| 16 | * You should have received a copy of the GNU General Public License | |
| 17 | * along with this program. If not, see <http://www.gnu.org/licenses/>. | |
| 18 | */ | |
| 19 | ||
| 20 | /** \file | |
| 21 | * BBC Goerz Metrawatt M2110 ASCII protocol parser. | |
| 22 | * | |
| 23 | * Most probably the simplest multimeter protocol ever ;-) . | |
| 24 | */ | |
| 25 | ||
| 26 | ||
| 27 | #include <string.h> | |
| 28 | #include <math.h> | |
| 29 | #include <glib.h> | |
| 30 | #include "libsigrok.h" | |
| 31 | #include "libsigrok-internal.h" | |
| 32 | ||
| 33 | ||
| 34 | /* Message logging helpers with subsystem-specific prefix string. */ | |
| 35 | #define LOG_PREFIX "bbcgm-m2110: " | |
| 36 | #define sr_log(l, s, args...) sr_log(l, LOG_PREFIX s, ## args) | |
| 37 | #define sr_spew(s, args...) sr_spew(LOG_PREFIX s, ## args) | |
| 38 | #define sr_dbg(s, args...) sr_dbg(LOG_PREFIX s, ## args) | |
| 39 | #define sr_info(s, args...) sr_info(LOG_PREFIX s, ## args) | |
| 40 | #define sr_warn(s, args...) sr_warn(LOG_PREFIX s, ## args) | |
| 41 | #define sr_err(s, args...) sr_err(LOG_PREFIX s, ## args) | |
| 42 | ||
| 43 | SR_PRIV gboolean sr_m2110_packet_valid(const uint8_t *buf) | |
| 44 | { | |
| 45 | float val; | |
| 46 | ||
| 47 | if ((buf[7] != '\r') || (buf[8] != '\n')) | |
| 48 | return FALSE; | |
| 49 | ||
| 50 | if (!strncmp((const char*)buf, "OVERRNG", 7)) | |
| 51 | return TRUE; | |
| 52 | ||
| 53 | if (sscanf((const char*)buf, "%f", &val) == 1) | |
| 54 | return TRUE; | |
| 55 | else | |
| 56 | return FALSE; | |
| 57 | } | |
| 58 | ||
| 59 | SR_PRIV int sr_m2110_parse(const uint8_t *buf, float *floatval, | |
| 60 | struct sr_datafeed_analog *analog, void *info) | |
| 61 | { | |
| 62 | float val; | |
| 63 | ||
| 64 | (void)info; | |
| 65 | ||
| 66 | analog->mq = SR_MQ_GAIN; /* We don't know the unit, so that's the best we can do.*/ | |
| 67 | analog->unit = SR_UNIT_UNITLESS; | |
| 68 | analog->mqflags = 0; | |
| 69 | ||
| 70 | if (!strncmp((const char*)buf, "OVERRNG", 7)) { | |
| 71 | *floatval = INFINITY; | |
| 72 | } | |
| 73 | else if (sscanf((const char*)buf, "%f", &val) == 1) | |
| 74 | *floatval = val; | |
| 75 | ||
| 76 | return SR_OK; | |
| 77 | } |