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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 BV |
20 | #include <string.h> |
21 | #include <stdarg.h> | |
ca1a7cb5 BV |
22 | #include "protocol.h" |
23 | ||
478c8d92 | 24 | SR_PRIV char *scpi_cmd_get(const struct sr_dev_inst *sdi, int command) |
9e45cd41 | 25 | { |
9e45cd41 | 26 | struct dev_context *devc; |
9e45cd41 | 27 | unsigned int i; |
9e45cd41 BV |
28 | char *cmd; |
29 | ||
30 | devc = sdi->priv; | |
31 | cmd = NULL; | |
32 | for (i = 0; i < devc->device->num_commands; i++) { | |
33 | if (devc->device->commands[i].command == command) { | |
34 | cmd = devc->device->commands[i].string; | |
35 | break; | |
36 | } | |
37 | } | |
478c8d92 BV |
38 | |
39 | return cmd; | |
40 | } | |
41 | ||
42 | SR_PRIV int scpi_cmd(const struct sr_dev_inst *sdi, int command, ...) | |
43 | { | |
44 | struct sr_scpi_dev_inst *scpi; | |
45 | va_list args; | |
46 | int ret; | |
47 | char *cmd; | |
48 | ||
49 | if (!(cmd = scpi_cmd_get(sdi, command))) { | |
9e45cd41 BV |
50 | /* Device does not implement this command, that's OK. */ |
51 | return SR_OK_CONTINUE; | |
52 | } | |
53 | ||
54 | scpi = sdi->conn; | |
55 | va_start(args, command); | |
56 | ret = sr_scpi_send_variadic(scpi, cmd, args); | |
57 | va_end(args); | |
58 | ||
59 | return ret; | |
60 | } | |
61 | ||
478c8d92 BV |
62 | SR_PRIV int scpi_cmd_resp(const struct sr_dev_inst *sdi, GVariant **gvar, |
63 | const GVariantType *gvtype, int command, ...) | |
64 | { | |
65 | struct sr_scpi_dev_inst *scpi; | |
66 | va_list args; | |
67 | double d; | |
68 | int ret; | |
69 | char *cmd, *s; | |
70 | ||
71 | if (!(cmd = scpi_cmd_get(sdi, command))) { | |
72 | /* Device does not implement this command, that's OK. */ | |
73 | return SR_OK_CONTINUE; | |
74 | } | |
75 | ||
76 | scpi = sdi->conn; | |
77 | va_start(args, command); | |
78 | ret = sr_scpi_send_variadic(scpi, cmd, args); | |
79 | va_end(args); | |
80 | if (ret != SR_OK) | |
81 | return ret; | |
82 | ||
83 | if (g_variant_type_equal(gvtype, G_VARIANT_TYPE_BOOLEAN)) { | |
84 | if ((ret = sr_scpi_get_string(scpi, NULL, &s)) != SR_OK) | |
85 | return ret; | |
86 | if (!strcasecmp(s, "ON") || !strcasecmp(s, "1") || !strcasecmp(s, "YES")) | |
87 | *gvar = g_variant_new_boolean(TRUE); | |
88 | else if (!strcasecmp(s, "OFF") || !strcasecmp(s, "0") || !strcasecmp(s, "NO")) | |
89 | *gvar = g_variant_new_boolean(FALSE); | |
90 | else | |
91 | ret = SR_ERR; | |
92 | } if (g_variant_type_equal(gvtype, G_VARIANT_TYPE_DOUBLE)) { | |
93 | if ((ret = sr_scpi_get_double(scpi, NULL, &d)) == SR_OK) | |
94 | *gvar = g_variant_new_double(d); | |
95 | } if (g_variant_type_equal(gvtype, G_VARIANT_TYPE_STRING)) { | |
96 | if ((ret = sr_scpi_get_string(scpi, NULL, &s)) == SR_OK) | |
97 | *gvar = g_variant_new_string(s); | |
98 | } | |
99 | ||
100 | return ret; | |
101 | } | |
102 | ||
60475cd7 BV |
103 | SR_PRIV int select_channel(const struct sr_dev_inst *sdi, struct sr_channel *ch) |
104 | { | |
105 | struct dev_context *devc; | |
624503ae | 106 | struct pps_channel *cur_pch, *new_pch; |
60475cd7 BV |
107 | int ret; |
108 | ||
109 | if (g_slist_length(sdi->channels) == 1) | |
110 | return SR_OK; | |
111 | ||
112 | devc = sdi->priv; | |
113 | if (ch == devc->cur_channel) | |
114 | return SR_OK; | |
115 | ||
624503ae BV |
116 | new_pch = ch->priv; |
117 | if (devc->cur_channel) { | |
118 | cur_pch = devc->cur_channel->priv; | |
119 | if (cur_pch->hw_output_idx == new_pch->hw_output_idx) { | |
120 | /* Same underlying output channel. */ | |
121 | devc->cur_channel = ch; | |
122 | return SR_OK; | |
123 | } | |
124 | } | |
125 | ||
126 | if ((ret = scpi_cmd(sdi, SCPI_CMD_SELECT_CHANNEL, new_pch->hwname)) == SR_OK) | |
60475cd7 BV |
127 | devc->cur_channel = ch; |
128 | ||
129 | return ret; | |
130 | } | |
131 | ||
624503ae BV |
132 | SR_PRIV struct sr_channel *next_enabled_channel(const struct sr_dev_inst *sdi, |
133 | struct sr_channel *cur_channel) | |
134 | { | |
135 | struct sr_channel *next_channel; | |
136 | GSList *l; | |
137 | ||
138 | next_channel = cur_channel; | |
139 | do { | |
140 | l = g_slist_find(sdi->channels, next_channel); | |
141 | if (l && l->next) | |
142 | next_channel = l->next->data; | |
143 | else | |
144 | next_channel = sdi->channels->data; | |
145 | } while (!next_channel->enabled); | |
146 | ||
147 | return next_channel; | |
148 | } | |
149 | ||
ca1a7cb5 BV |
150 | SR_PRIV int scpi_pps_receive_data(int fd, int revents, void *cb_data) |
151 | { | |
ca1a7cb5 | 152 | struct dev_context *devc; |
9e45cd41 BV |
153 | struct sr_datafeed_packet packet; |
154 | struct sr_datafeed_analog analog; | |
155 | const struct sr_dev_inst *sdi; | |
60475cd7 | 156 | struct sr_channel *next_channel; |
9e45cd41 | 157 | struct sr_scpi_dev_inst *scpi; |
01b0257a | 158 | struct pps_channel *pch; |
9e45cd41 | 159 | float f; |
01b0257a | 160 | int cmd; |
ca1a7cb5 BV |
161 | |
162 | (void)fd; | |
9e45cd41 | 163 | (void)revents; |
ca1a7cb5 BV |
164 | |
165 | if (!(sdi = cb_data)) | |
166 | return TRUE; | |
167 | ||
168 | if (!(devc = sdi->priv)) | |
169 | return TRUE; | |
170 | ||
9e45cd41 BV |
171 | scpi = sdi->conn; |
172 | ||
173 | /* Retrieve requested value for this state. */ | |
174 | if (sr_scpi_get_float(scpi, NULL, &f) == SR_OK) { | |
01b0257a | 175 | pch = devc->cur_channel->priv; |
9e45cd41 BV |
176 | packet.type = SR_DF_ANALOG; |
177 | packet.payload = &analog; | |
178 | analog.channels = g_slist_append(NULL, devc->cur_channel); | |
179 | analog.num_samples = 1; | |
01b0257a BV |
180 | analog.mq = pch->mq; |
181 | if (pch->mq == SR_MQ_VOLTAGE) | |
9e45cd41 | 182 | analog.unit = SR_UNIT_VOLT; |
01b0257a | 183 | else if (pch->mq == SR_MQ_CURRENT) |
9e45cd41 | 184 | analog.unit = SR_UNIT_AMPERE; |
01b0257a BV |
185 | else if (pch->mq == SR_MQ_POWER) |
186 | analog.unit = SR_UNIT_WATT; | |
9e45cd41 BV |
187 | analog.mqflags = SR_MQFLAG_DC; |
188 | analog.data = &f; | |
189 | sr_session_send(sdi, &packet); | |
190 | g_slist_free(analog.channels); | |
191 | } | |
192 | ||
60475cd7 | 193 | if (g_slist_length(sdi->channels) > 1) { |
624503ae BV |
194 | next_channel = next_enabled_channel(sdi, devc->cur_channel); |
195 | if (select_channel(sdi, next_channel) != SR_OK) { | |
60475cd7 BV |
196 | sr_err("Failed to select channel %s", next_channel->name); |
197 | return FALSE; | |
198 | } | |
199 | } | |
01b0257a BV |
200 | |
201 | pch = devc->cur_channel->priv; | |
202 | if (pch->mq == SR_MQ_VOLTAGE) | |
203 | cmd = SCPI_CMD_GET_MEAS_VOLTAGE; | |
204 | else if (pch->mq == SR_MQ_CURRENT) | |
205 | cmd = SCPI_CMD_GET_MEAS_CURRENT; | |
206 | else if (pch->mq == SR_MQ_POWER) | |
207 | cmd = SCPI_CMD_GET_MEAS_POWER; | |
208 | else | |
209 | return SR_ERR; | |
624503ae | 210 | scpi_cmd(sdi, cmd); |
ca1a7cb5 BV |
211 | |
212 | return TRUE; | |
213 | } |