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1 | /* | |
2 | * This file is part of the libsigrok project. | |
3 | * | |
4 | * Copyright (C) 2014 Bert Vermeulen <bert@biot.com> | |
5 | * Copyright (C) 2019 Frank Stettner <frank-stettner@gmx.net> | |
6 | * | |
7 | * This program is free software: you can redistribute it and/or modify | |
8 | * it under the terms of the GNU General Public License as published by | |
9 | * the Free Software Foundation, either version 3 of the License, or | |
10 | * (at your option) any later version. | |
11 | * | |
12 | * This program is distributed in the hope that it will be useful, | |
13 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
14 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
15 | * GNU General Public License for more details. | |
16 | * | |
17 | * You should have received a copy of the GNU General Public License | |
18 | * along with this program. If not, see <http://www.gnu.org/licenses/>. | |
19 | */ | |
20 | ||
21 | #include <config.h> | |
22 | #include <string.h> | |
23 | #include <strings.h> | |
24 | #include <stdarg.h> | |
25 | #include "scpi.h" | |
26 | #include "protocol.h" | |
27 | ||
28 | SR_PRIV int scpi_pps_receive_data(int fd, int revents, void *cb_data) | |
29 | { | |
30 | struct dev_context *devc; | |
31 | const struct scpi_pps *device; | |
32 | struct sr_datafeed_packet packet; | |
33 | struct sr_datafeed_analog analog; | |
34 | struct sr_analog_encoding encoding; | |
35 | struct sr_analog_meaning meaning; | |
36 | struct sr_analog_spec spec; | |
37 | struct sr_dev_inst *sdi; | |
38 | int channel_group_cmd; | |
39 | const char *channel_group_name; | |
40 | struct pps_channel *pch; | |
41 | const struct channel_spec *ch_spec; | |
42 | int ret; | |
43 | float f; | |
44 | GVariant *gvdata; | |
45 | const GVariantType *gvtype; | |
46 | int cmd; | |
47 | ||
48 | (void)fd; | |
49 | (void)revents; | |
50 | ||
51 | if (!(sdi = cb_data)) | |
52 | return TRUE; | |
53 | ||
54 | if (!(devc = sdi->priv)) | |
55 | return TRUE; | |
56 | ||
57 | if (!(device = devc->device)) | |
58 | return TRUE; | |
59 | ||
60 | pch = devc->cur_acquisition_channel->priv; | |
61 | ||
62 | channel_group_cmd = 0; | |
63 | channel_group_name = NULL; | |
64 | if (g_slist_length(sdi->channel_groups) > 1) { | |
65 | channel_group_cmd = SCPI_CMD_SELECT_CHANNEL; | |
66 | channel_group_name = pch->hwname; | |
67 | } | |
68 | ||
69 | /* | |
70 | * When the current channel is the first in the array, perform the device | |
71 | * specific status update first. | |
72 | */ | |
73 | if (devc->cur_acquisition_channel == sr_next_enabled_channel(sdi, NULL) && | |
74 | device->update_status) { | |
75 | device->update_status(sdi); | |
76 | } | |
77 | ||
78 | if (pch->mq == SR_MQ_VOLTAGE) { | |
79 | gvtype = G_VARIANT_TYPE_DOUBLE; | |
80 | cmd = SCPI_CMD_GET_MEAS_VOLTAGE; | |
81 | } else if (pch->mq == SR_MQ_FREQUENCY) { | |
82 | gvtype = G_VARIANT_TYPE_DOUBLE; | |
83 | cmd = SCPI_CMD_GET_MEAS_FREQUENCY; | |
84 | } else if (pch->mq == SR_MQ_CURRENT) { | |
85 | gvtype = G_VARIANT_TYPE_DOUBLE; | |
86 | cmd = SCPI_CMD_GET_MEAS_CURRENT; | |
87 | } else if (pch->mq == SR_MQ_POWER) { | |
88 | gvtype = G_VARIANT_TYPE_DOUBLE; | |
89 | cmd = SCPI_CMD_GET_MEAS_POWER; | |
90 | } else { | |
91 | return SR_ERR; | |
92 | } | |
93 | ||
94 | ret = sr_scpi_cmd_resp(sdi, devc->device->commands, | |
95 | channel_group_cmd, channel_group_name, &gvdata, gvtype, cmd); | |
96 | ||
97 | if (ret != SR_OK) | |
98 | return ret; | |
99 | ||
100 | ch_spec = &devc->device->channels[pch->hw_output_idx]; | |
101 | packet.type = SR_DF_ANALOG; | |
102 | packet.payload = &analog; | |
103 | /* Note: digits/spec_digits will be overridden later. */ | |
104 | sr_analog_init(&analog, &encoding, &meaning, &spec, 0); | |
105 | analog.meaning->channels = g_slist_append(NULL, devc->cur_acquisition_channel); | |
106 | analog.num_samples = 1; | |
107 | analog.meaning->mq = pch->mq; | |
108 | analog.meaning->mqflags = pch->mqflags; | |
109 | if (pch->mq == SR_MQ_VOLTAGE) { | |
110 | analog.meaning->unit = SR_UNIT_VOLT; | |
111 | analog.encoding->digits = ch_spec->voltage[4]; | |
112 | analog.spec->spec_digits = ch_spec->voltage[3]; | |
113 | } else if (pch->mq == SR_MQ_CURRENT) { | |
114 | analog.meaning->unit = SR_UNIT_AMPERE; | |
115 | analog.encoding->digits = ch_spec->current[4]; | |
116 | analog.spec->spec_digits = ch_spec->current[3]; | |
117 | } else if (pch->mq == SR_MQ_POWER) { | |
118 | analog.meaning->unit = SR_UNIT_WATT; | |
119 | analog.encoding->digits = ch_spec->power[4]; | |
120 | analog.spec->spec_digits = ch_spec->power[3]; | |
121 | } else if (pch->mq == SR_MQ_FREQUENCY) { | |
122 | analog.meaning->unit = SR_UNIT_HERTZ; | |
123 | analog.encoding->digits = ch_spec->frequency[4]; | |
124 | analog.spec->spec_digits = ch_spec->frequency[3]; | |
125 | } | |
126 | f = (float)g_variant_get_double(gvdata); | |
127 | g_variant_unref(gvdata); | |
128 | analog.data = &f; | |
129 | sr_session_send(sdi, &packet); | |
130 | g_slist_free(analog.meaning->channels); | |
131 | ||
132 | /* Next channel. */ | |
133 | if (g_slist_length(sdi->channels) > 1) { | |
134 | devc->cur_acquisition_channel = | |
135 | sr_next_enabled_channel(sdi, devc->cur_acquisition_channel); | |
136 | } | |
137 | ||
138 | if (devc->cur_acquisition_channel == sr_next_enabled_channel(sdi, NULL)) | |
139 | /* First enabled channel, so each channel has been sampled */ | |
140 | sr_sw_limits_update_samples_read(&devc->limits, 1); | |
141 | ||
142 | /* Stop if limits have been hit. */ | |
143 | if (sr_sw_limits_check(&devc->limits)) | |
144 | sr_dev_acquisition_stop(sdi); | |
145 | ||
146 | return TRUE; | |
147 | } |