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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 | * | |
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 | ||
20 | #include <string.h> | |
21 | #include <stdarg.h> | |
22 | #include "protocol.h" | |
23 | ||
24 | SR_PRIV char *scpi_cmd_get(const struct sr_dev_inst *sdi, int command) | |
25 | { | |
26 | struct dev_context *devc; | |
27 | unsigned int i; | |
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 | } | |
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))) { | |
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 | ||
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 | /* Non-standard data type responses. */ | |
84 | if (command == SCPI_CMD_GET_OUTPUT_REGULATION) { | |
85 | /* | |
86 | * The Rigol DP800 series return CV/CC/UR, Philips PM2800 | |
87 | * return VOLT/CURR. We always return a GVariant string in | |
88 | * the Rigol notation. | |
89 | */ | |
90 | if ((ret = sr_scpi_get_string(scpi, NULL, &s)) != SR_OK) | |
91 | return ret; | |
92 | if (!strcmp(s, "CV") || !strcmp(s, "VOLT")) { | |
93 | *gvar = g_variant_new_string("CV"); | |
94 | } else if (!strcmp(s, "CC") || !strcmp(s, "CURR")) { | |
95 | *gvar = g_variant_new_string("CC"); | |
96 | } else if (!strcmp(s, "UR")) { | |
97 | *gvar = g_variant_new_string("UR"); | |
98 | } else { | |
99 | sr_dbg("Unknown response to SCPI_CMD_GET_OUTPUT_REGULATION: %s", s); | |
100 | ret = SR_ERR_DATA; | |
101 | } | |
102 | g_free(s); | |
103 | } else { | |
104 | /* Straight SCPI getters to GVariant types. */ | |
105 | if (g_variant_type_equal(gvtype, G_VARIANT_TYPE_BOOLEAN)) { | |
106 | if ((ret = sr_scpi_get_string(scpi, NULL, &s)) != SR_OK) | |
107 | return ret; | |
108 | if (!strcasecmp(s, "ON") || !strcasecmp(s, "1") || !strcasecmp(s, "YES")) | |
109 | *gvar = g_variant_new_boolean(TRUE); | |
110 | else if (!strcasecmp(s, "OFF") || !strcasecmp(s, "0") || !strcasecmp(s, "NO")) | |
111 | *gvar = g_variant_new_boolean(FALSE); | |
112 | else | |
113 | ret = SR_ERR; | |
114 | g_free(s); | |
115 | } if (g_variant_type_equal(gvtype, G_VARIANT_TYPE_DOUBLE)) { | |
116 | if ((ret = sr_scpi_get_double(scpi, NULL, &d)) == SR_OK) | |
117 | *gvar = g_variant_new_double(d); | |
118 | } if (g_variant_type_equal(gvtype, G_VARIANT_TYPE_STRING)) { | |
119 | if ((ret = sr_scpi_get_string(scpi, NULL, &s)) == SR_OK) | |
120 | *gvar = g_variant_new_string(s); | |
121 | } | |
122 | } | |
123 | ||
124 | return ret; | |
125 | } | |
126 | ||
127 | SR_PRIV int select_channel(const struct sr_dev_inst *sdi, struct sr_channel *ch) | |
128 | { | |
129 | struct dev_context *devc; | |
130 | struct pps_channel *cur_pch, *new_pch; | |
131 | int ret; | |
132 | ||
133 | if (g_slist_length(sdi->channels) == 1) | |
134 | return SR_OK; | |
135 | ||
136 | devc = sdi->priv; | |
137 | if (ch == devc->cur_channel) | |
138 | return SR_OK; | |
139 | ||
140 | new_pch = ch->priv; | |
141 | if (devc->cur_channel) { | |
142 | cur_pch = devc->cur_channel->priv; | |
143 | if (cur_pch->hw_output_idx == new_pch->hw_output_idx) { | |
144 | /* Same underlying output channel. */ | |
145 | devc->cur_channel = ch; | |
146 | return SR_OK; | |
147 | } | |
148 | } | |
149 | ||
150 | if ((ret = scpi_cmd(sdi, SCPI_CMD_SELECT_CHANNEL, new_pch->hwname)) == SR_OK) | |
151 | devc->cur_channel = ch; | |
152 | ||
153 | return ret; | |
154 | } | |
155 | ||
156 | SR_PRIV struct sr_channel *next_enabled_channel(const struct sr_dev_inst *sdi, | |
157 | struct sr_channel *cur_channel) | |
158 | { | |
159 | struct sr_channel *next_channel; | |
160 | GSList *l; | |
161 | ||
162 | next_channel = cur_channel; | |
163 | do { | |
164 | l = g_slist_find(sdi->channels, next_channel); | |
165 | if (l && l->next) | |
166 | next_channel = l->next->data; | |
167 | else | |
168 | next_channel = sdi->channels->data; | |
169 | } while (!next_channel->enabled); | |
170 | ||
171 | return next_channel; | |
172 | } | |
173 | ||
174 | SR_PRIV int scpi_pps_receive_data(int fd, int revents, void *cb_data) | |
175 | { | |
176 | struct dev_context *devc; | |
177 | struct sr_datafeed_packet packet; | |
178 | struct sr_datafeed_analog analog; | |
179 | const struct sr_dev_inst *sdi; | |
180 | struct sr_channel *next_channel; | |
181 | struct sr_scpi_dev_inst *scpi; | |
182 | struct pps_channel *pch; | |
183 | float f; | |
184 | int cmd; | |
185 | ||
186 | (void)fd; | |
187 | (void)revents; | |
188 | ||
189 | if (!(sdi = cb_data)) | |
190 | return TRUE; | |
191 | ||
192 | if (!(devc = sdi->priv)) | |
193 | return TRUE; | |
194 | ||
195 | scpi = sdi->conn; | |
196 | ||
197 | /* Retrieve requested value for this state. */ | |
198 | if (sr_scpi_get_float(scpi, NULL, &f) == SR_OK) { | |
199 | pch = devc->cur_channel->priv; | |
200 | packet.type = SR_DF_ANALOG; | |
201 | packet.payload = &analog; | |
202 | analog.channels = g_slist_append(NULL, devc->cur_channel); | |
203 | analog.num_samples = 1; | |
204 | analog.mq = pch->mq; | |
205 | if (pch->mq == SR_MQ_VOLTAGE) | |
206 | analog.unit = SR_UNIT_VOLT; | |
207 | else if (pch->mq == SR_MQ_CURRENT) | |
208 | analog.unit = SR_UNIT_AMPERE; | |
209 | else if (pch->mq == SR_MQ_POWER) | |
210 | analog.unit = SR_UNIT_WATT; | |
211 | analog.mqflags = SR_MQFLAG_DC; | |
212 | analog.data = &f; | |
213 | sr_session_send(sdi, &packet); | |
214 | g_slist_free(analog.channels); | |
215 | } | |
216 | ||
217 | if (g_slist_length(sdi->channels) > 1) { | |
218 | next_channel = next_enabled_channel(sdi, devc->cur_channel); | |
219 | if (select_channel(sdi, next_channel) != SR_OK) { | |
220 | sr_err("Failed to select channel %s", next_channel->name); | |
221 | return FALSE; | |
222 | } | |
223 | } | |
224 | ||
225 | pch = devc->cur_channel->priv; | |
226 | if (pch->mq == SR_MQ_VOLTAGE) | |
227 | cmd = SCPI_CMD_GET_MEAS_VOLTAGE; | |
228 | else if (pch->mq == SR_MQ_CURRENT) | |
229 | cmd = SCPI_CMD_GET_MEAS_CURRENT; | |
230 | else if (pch->mq == SR_MQ_POWER) | |
231 | cmd = SCPI_CMD_GET_MEAS_POWER; | |
232 | else | |
233 | return SR_ERR; | |
234 | scpi_cmd(sdi, cmd); | |
235 | ||
236 | return TRUE; | |
237 | } |