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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; |
6ed709fe | 69 | const struct channel_spec *ch_spec; |
9e45cd41 | 70 | float f; |
01b0257a | 71 | int cmd; |
ca1a7cb5 BV |
72 | |
73 | (void)fd; | |
9e45cd41 | 74 | (void)revents; |
ca1a7cb5 BV |
75 | |
76 | if (!(sdi = cb_data)) | |
77 | return TRUE; | |
78 | ||
79 | if (!(devc = sdi->priv)) | |
80 | return TRUE; | |
81 | ||
9e45cd41 BV |
82 | scpi = sdi->conn; |
83 | ||
84 | /* Retrieve requested value for this state. */ | |
85 | if (sr_scpi_get_float(scpi, NULL, &f) == SR_OK) { | |
01b0257a | 86 | pch = devc->cur_channel->priv; |
6ed709fe | 87 | ch_spec = &devc->device->channels[pch->hw_output_idx]; |
0de290a5 | 88 | packet.type = SR_DF_ANALOG; |
9e45cd41 | 89 | packet.payload = &analog; |
869c8375 | 90 | /* Note: digits/spec_digits will be overridden later. */ |
0de290a5 UH |
91 | sr_analog_init(&analog, &encoding, &meaning, &spec, 0); |
92 | analog.meaning->channels = g_slist_append(NULL, devc->cur_channel); | |
9e45cd41 | 93 | analog.num_samples = 1; |
0de290a5 | 94 | analog.meaning->mq = pch->mq; |
6ed709fe | 95 | if (pch->mq == SR_MQ_VOLTAGE) { |
0de290a5 | 96 | analog.meaning->unit = SR_UNIT_VOLT; |
6ed709fe AJ |
97 | analog.encoding->digits = ch_spec->voltage[4]; |
98 | analog.spec->spec_digits = ch_spec->voltage[3]; | |
99 | } else if (pch->mq == SR_MQ_CURRENT) { | |
0de290a5 | 100 | analog.meaning->unit = SR_UNIT_AMPERE; |
6ed709fe AJ |
101 | analog.encoding->digits = ch_spec->current[4]; |
102 | analog.spec->spec_digits = ch_spec->current[3]; | |
103 | } else if (pch->mq == SR_MQ_POWER) { | |
0de290a5 | 104 | analog.meaning->unit = SR_UNIT_WATT; |
6ed709fe AJ |
105 | analog.encoding->digits = ch_spec->power[4]; |
106 | analog.spec->spec_digits = ch_spec->power[3]; | |
107 | } | |
0de290a5 | 108 | analog.meaning->mqflags = SR_MQFLAG_DC; |
9e45cd41 BV |
109 | analog.data = &f; |
110 | sr_session_send(sdi, &packet); | |
0de290a5 | 111 | g_slist_free(analog.meaning->channels); |
9e45cd41 BV |
112 | } |
113 | ||
60475cd7 | 114 | if (g_slist_length(sdi->channels) > 1) { |
9c24d16a | 115 | next_channel = sr_next_enabled_channel(sdi, devc->cur_channel); |
624503ae | 116 | if (select_channel(sdi, next_channel) != SR_OK) { |
60475cd7 BV |
117 | sr_err("Failed to select channel %s", next_channel->name); |
118 | return FALSE; | |
119 | } | |
120 | } | |
01b0257a BV |
121 | |
122 | pch = devc->cur_channel->priv; | |
123 | if (pch->mq == SR_MQ_VOLTAGE) | |
124 | cmd = SCPI_CMD_GET_MEAS_VOLTAGE; | |
4264f1c0 AG |
125 | else if (pch->mq == SR_MQ_FREQUENCY) |
126 | cmd = SCPI_CMD_GET_MEAS_FREQUENCY; | |
01b0257a BV |
127 | else if (pch->mq == SR_MQ_CURRENT) |
128 | cmd = SCPI_CMD_GET_MEAS_CURRENT; | |
129 | else if (pch->mq == SR_MQ_POWER) | |
130 | cmd = SCPI_CMD_GET_MEAS_POWER; | |
131 | else | |
132 | return SR_ERR; | |
91ef511d | 133 | scpi_cmd(sdi, devc->device->commands, cmd); |
ca1a7cb5 BV |
134 | |
135 | return TRUE; | |
136 | } |