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