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ca1a7cb5 BV |
1 | /* |
2 | * This file is part of the libsigrok project. | |
3 | * | |
4 | * Copyright (C) 2014 Bert Vermeulen <bert@biot.com> | |
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 | ||
6ec6c43b | 20 | #include <config.h> |
9e45cd41 | 21 | #include <string.h> |
ba464a12 | 22 | #include <strings.h> |
9e45cd41 | 23 | #include <stdarg.h> |
91ef511d | 24 | #include "scpi.h" |
ca1a7cb5 BV |
25 | #include "protocol.h" |
26 | ||
60475cd7 BV |
27 | SR_PRIV int select_channel(const struct sr_dev_inst *sdi, struct sr_channel *ch) |
28 | { | |
29 | struct dev_context *devc; | |
624503ae | 30 | struct pps_channel *cur_pch, *new_pch; |
60475cd7 BV |
31 | int ret; |
32 | ||
33 | if (g_slist_length(sdi->channels) == 1) | |
34 | return SR_OK; | |
35 | ||
36 | devc = sdi->priv; | |
37 | if (ch == devc->cur_channel) | |
38 | return SR_OK; | |
39 | ||
624503ae BV |
40 | new_pch = ch->priv; |
41 | if (devc->cur_channel) { | |
42 | cur_pch = devc->cur_channel->priv; | |
43 | if (cur_pch->hw_output_idx == new_pch->hw_output_idx) { | |
44 | /* Same underlying output channel. */ | |
45 | devc->cur_channel = ch; | |
46 | return SR_OK; | |
47 | } | |
48 | } | |
49 | ||
91ef511d BV |
50 | if ((ret = scpi_cmd(sdi, devc->device->commands, SCPI_CMD_SELECT_CHANNEL, |
51 | new_pch->hwname)) >= 0) | |
60475cd7 BV |
52 | devc->cur_channel = ch; |
53 | ||
54 | return ret; | |
55 | } | |
56 | ||
ca1a7cb5 BV |
57 | SR_PRIV int scpi_pps_receive_data(int fd, int revents, void *cb_data) |
58 | { | |
ca1a7cb5 | 59 | struct dev_context *devc; |
9e45cd41 | 60 | struct sr_datafeed_packet packet; |
0de290a5 UH |
61 | struct sr_datafeed_analog analog; |
62 | struct sr_analog_encoding encoding; | |
63 | struct sr_analog_meaning meaning; | |
64 | struct sr_analog_spec spec; | |
9e45cd41 | 65 | const struct sr_dev_inst *sdi; |
60475cd7 | 66 | struct sr_channel *next_channel; |
9e45cd41 | 67 | struct sr_scpi_dev_inst *scpi; |
01b0257a | 68 | struct pps_channel *pch; |
9e45cd41 | 69 | float f; |
01b0257a | 70 | int cmd; |
ca1a7cb5 BV |
71 | |
72 | (void)fd; | |
9e45cd41 | 73 | (void)revents; |
ca1a7cb5 BV |
74 | |
75 | if (!(sdi = cb_data)) | |
76 | return TRUE; | |
77 | ||
78 | if (!(devc = sdi->priv)) | |
79 | return TRUE; | |
80 | ||
9e45cd41 BV |
81 | scpi = sdi->conn; |
82 | ||
83 | /* Retrieve requested value for this state. */ | |
84 | if (sr_scpi_get_float(scpi, NULL, &f) == SR_OK) { | |
01b0257a | 85 | pch = devc->cur_channel->priv; |
0de290a5 | 86 | packet.type = SR_DF_ANALOG; |
9e45cd41 | 87 | packet.payload = &analog; |
0de290a5 UH |
88 | sr_analog_init(&analog, &encoding, &meaning, &spec, 0); |
89 | analog.meaning->channels = g_slist_append(NULL, devc->cur_channel); | |
9e45cd41 | 90 | analog.num_samples = 1; |
0de290a5 | 91 | analog.meaning->mq = pch->mq; |
01b0257a | 92 | if (pch->mq == SR_MQ_VOLTAGE) |
0de290a5 | 93 | analog.meaning->unit = SR_UNIT_VOLT; |
01b0257a | 94 | else if (pch->mq == SR_MQ_CURRENT) |
0de290a5 | 95 | analog.meaning->unit = SR_UNIT_AMPERE; |
01b0257a | 96 | else if (pch->mq == SR_MQ_POWER) |
0de290a5 UH |
97 | analog.meaning->unit = SR_UNIT_WATT; |
98 | analog.meaning->mqflags = SR_MQFLAG_DC; | |
9e45cd41 BV |
99 | analog.data = &f; |
100 | sr_session_send(sdi, &packet); | |
0de290a5 | 101 | g_slist_free(analog.meaning->channels); |
9e45cd41 BV |
102 | } |
103 | ||
60475cd7 | 104 | if (g_slist_length(sdi->channels) > 1) { |
9c24d16a | 105 | next_channel = sr_next_enabled_channel(sdi, devc->cur_channel); |
624503ae | 106 | if (select_channel(sdi, next_channel) != SR_OK) { |
60475cd7 BV |
107 | sr_err("Failed to select channel %s", next_channel->name); |
108 | return FALSE; | |
109 | } | |
110 | } | |
01b0257a BV |
111 | |
112 | pch = devc->cur_channel->priv; | |
113 | if (pch->mq == SR_MQ_VOLTAGE) | |
114 | cmd = SCPI_CMD_GET_MEAS_VOLTAGE; | |
4264f1c0 AG |
115 | else if (pch->mq == SR_MQ_FREQUENCY) |
116 | cmd = SCPI_CMD_GET_MEAS_FREQUENCY; | |
01b0257a BV |
117 | else if (pch->mq == SR_MQ_CURRENT) |
118 | cmd = SCPI_CMD_GET_MEAS_CURRENT; | |
119 | else if (pch->mq == SR_MQ_POWER) | |
120 | cmd = SCPI_CMD_GET_MEAS_POWER; | |
121 | else | |
122 | return SR_ERR; | |
91ef511d | 123 | scpi_cmd(sdi, devc->device->commands, cmd); |
ca1a7cb5 BV |
124 | |
125 | return TRUE; | |
126 | } |