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1 | /* | |
2 | * This file is part of the libsigrok project. | |
3 | * | |
4 | * Copyright (C) 2014 Matthias Heidbrink <m-sigrok@heidbrink.biz> | |
5 | * Copyright (C) 2014 Bert Vermeulen <bert@biot.com> (code from atten-pps3xxx) | |
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 | /** | |
22 | * @file | |
23 | * | |
24 | * <em>Motech LPS-30x series</em> power supply driver | |
25 | * | |
26 | * @internal | |
27 | */ | |
28 | ||
29 | #include <config.h> | |
30 | #include <errno.h> | |
31 | #include <string.h> | |
32 | #include "protocol.h" | |
33 | ||
34 | /** Send data packets for current measurements. */ | |
35 | static void send_data(struct sr_dev_inst *sdi) | |
36 | { | |
37 | struct dev_context *devc; | |
38 | struct sr_datafeed_packet packet; | |
39 | struct sr_datafeed_analog analog; | |
40 | struct sr_analog_encoding encoding; | |
41 | struct sr_analog_meaning meaning; | |
42 | struct sr_analog_spec spec; | |
43 | int i; | |
44 | float data[MAX_CHANNELS]; | |
45 | ||
46 | devc = sdi->priv; | |
47 | packet.type = SR_DF_ANALOG; | |
48 | packet.payload = &analog; | |
49 | ||
50 | /* Note: digits/spec_digits will be overridden later. */ | |
51 | sr_analog_init(&analog, &encoding, &meaning, &spec, 0); | |
52 | ||
53 | analog.meaning->channels = sdi->channels; | |
54 | analog.num_samples = 1; | |
55 | analog.meaning->mq = SR_MQ_VOLTAGE; | |
56 | analog.meaning->unit = SR_UNIT_VOLT; | |
57 | analog.meaning->mqflags = SR_MQFLAG_DC; | |
58 | analog.encoding->digits = 3; | |
59 | analog.spec->spec_digits = 2; | |
60 | analog.data = data; | |
61 | ||
62 | for (i = 0; i < devc->model->num_channels; i++) | |
63 | ((float *)analog.data)[i] = devc->channel_status[i].output_voltage_last; /* Value always 3.3 or 5 for channel 3, if present! */ | |
64 | sr_session_send(sdi, &packet); | |
65 | ||
66 | analog.meaning->mq = SR_MQ_CURRENT; | |
67 | analog.meaning->unit = SR_UNIT_AMPERE; | |
68 | analog.meaning->mqflags = 0; | |
69 | analog.encoding->digits = 4; | |
70 | analog.spec->spec_digits = 3; | |
71 | analog.data = data; | |
72 | for (i = 0; i < devc->model->num_channels; i++) | |
73 | ((float *)analog.data)[i] = devc->channel_status[i].output_current_last; /* Value always 0 for channel 3, if present! */ | |
74 | sr_session_send(sdi, &packet); | |
75 | ||
76 | sr_sw_limits_update_samples_read(&devc->limits, 1); | |
77 | } | |
78 | ||
79 | /** Process a complete line (without CR/LF) in buf. */ | |
80 | static void process_line(struct sr_dev_inst *sdi) | |
81 | { | |
82 | struct dev_context *devc; | |
83 | double dbl; | |
84 | int auxint; | |
85 | ||
86 | devc = sdi->priv; | |
87 | ||
88 | switch (devc->acq_req_pending) { | |
89 | case 0: /* Should not happen... */ | |
90 | break; | |
91 | case 1: /* Waiting for data reply to request */ | |
92 | /* Convert numbers */ | |
93 | switch (devc->acq_req) { | |
94 | case AQ_U1: | |
95 | case AQ_U2: | |
96 | case AQ_I1: | |
97 | case AQ_I2: | |
98 | if (sr_atod(devc->buf, &dbl) != SR_OK) { | |
99 | sr_err("Failed to convert '%s' to double, errno=%d %s", | |
100 | devc->buf, errno, g_strerror(errno)); | |
101 | dbl = 0.0; | |
102 | } | |
103 | break; | |
104 | case AQ_STATUS: | |
105 | if (sr_atoi(devc->buf, &auxint) != SR_OK) { | |
106 | sr_err("Failed to convert '%s' to int, errno=%d %s", | |
107 | devc->buf, errno, g_strerror(errno)); | |
108 | auxint = 0; | |
109 | } | |
110 | break; | |
111 | default: | |
112 | break; | |
113 | } | |
114 | ||
115 | switch (devc->acq_req) { | |
116 | case AQ_U1: | |
117 | devc->channel_status[0].output_voltage_last = dbl; | |
118 | break; | |
119 | case AQ_I1: | |
120 | devc->channel_status[0].output_current_last = dbl; | |
121 | break; | |
122 | case AQ_U2: | |
123 | devc->channel_status[1].output_voltage_last = dbl; | |
124 | break; | |
125 | case AQ_I2: | |
126 | devc->channel_status[1].output_current_last = dbl; | |
127 | break; | |
128 | case AQ_STATUS: /* Process status and generate data. */ | |
129 | if (lps_process_status(sdi, auxint) == SR_OK) { | |
130 | send_data(sdi); | |
131 | } | |
132 | break; | |
133 | default: | |
134 | break; | |
135 | } | |
136 | ||
137 | devc->acq_req_pending = 2; | |
138 | break; | |
139 | case 2: /* Waiting for OK after request */ | |
140 | if (strcmp(devc->buf, "OK")) { | |
141 | sr_err("Unexpected reply while waiting for OK: '%s'", devc->buf); | |
142 | } | |
143 | devc->acq_req_pending = 0; | |
144 | break; | |
145 | } | |
146 | ||
147 | devc->buf[0] = '\0'; | |
148 | devc->buflen = 0; | |
149 | } | |
150 | ||
151 | SR_PRIV int motech_lps_30x_receive_data(int fd, int revents, void *cb_data) | |
152 | { | |
153 | struct sr_dev_inst *sdi; | |
154 | struct dev_context *devc; | |
155 | struct sr_serial_dev_inst *serial; | |
156 | int len; | |
157 | ||
158 | (void)fd; | |
159 | ||
160 | if (!(sdi = cb_data)) | |
161 | return TRUE; | |
162 | ||
163 | if (!(devc = sdi->priv)) | |
164 | return TRUE; | |
165 | ||
166 | serial = sdi->conn; | |
167 | ||
168 | if (revents == G_IO_IN) { /* Serial data arrived. */ | |
169 | while (LINELEN_MAX - devc->buflen - 2 > 0) { | |
170 | len = serial_read_nonblocking(serial, devc->buf + devc->buflen, 1); | |
171 | if (len < 1) | |
172 | break; | |
173 | ||
174 | /* Eliminate whitespace at beginning of line. */ | |
175 | if (g_ascii_isspace(devc->buf[0])) { | |
176 | devc->buf[0] = '\0'; | |
177 | devc->buflen = 0; | |
178 | continue; | |
179 | } | |
180 | ||
181 | devc->buflen += len; | |
182 | devc->buf[devc->buflen] = '\0'; | |
183 | ||
184 | /* If line complete, process msg. */ | |
185 | if ((devc->buflen > 0) && ((devc->buf[devc->buflen-1] == '\r') || devc->buf[devc->buflen-1] == '\n')) { | |
186 | devc->buflen--; | |
187 | devc->buf[devc->buflen] = '\0'; | |
188 | ||
189 | sr_spew("Line complete: \"%s\"", devc->buf); | |
190 | process_line(sdi); | |
191 | } | |
192 | } | |
193 | } | |
194 | ||
195 | if (sr_sw_limits_check(&devc->limits)) | |
196 | sdi->driver->dev_acquisition_stop(sdi); | |
197 | ||
198 | /* Only request the next packet if required. */ | |
199 | if (!((sdi->status == SR_ST_ACTIVE) && (devc->acq_running))) | |
200 | return TRUE; | |
201 | ||
202 | if (devc->acq_req_pending) { | |
203 | int64_t elapsed_us = g_get_monotonic_time() - devc->req_sent_at; | |
204 | if (elapsed_us > (REQ_TIMEOUT_MS * 1000)) { | |
205 | sr_spew("Request timeout: req=%d t=%" PRIi64 "us", | |
206 | (int)devc->acq_req, elapsed_us); | |
207 | devc->acq_req_pending = 0; | |
208 | } | |
209 | } | |
210 | ||
211 | if (devc->acq_req_pending == 0) { | |
212 | switch (devc->acq_req) { | |
213 | case AQ_NONE: /* Fall through */ | |
214 | case AQ_STATUS: | |
215 | devc->acq_req = AQ_U1; | |
216 | lps_send_req(serial, "VOUT1"); | |
217 | break; | |
218 | case AQ_U1: | |
219 | devc->acq_req = AQ_I1; | |
220 | lps_send_req(serial, "IOUT1"); | |
221 | break; | |
222 | case AQ_I1: | |
223 | if (devc->model->num_channels == 1) { | |
224 | devc->acq_req = AQ_STATUS; | |
225 | lps_send_req(serial, "STATUS"); | |
226 | } else { | |
227 | devc->acq_req = AQ_U2; | |
228 | lps_send_req(serial, "VOUT2"); | |
229 | } | |
230 | break; | |
231 | case AQ_U2: | |
232 | devc->acq_req = AQ_I2; | |
233 | lps_send_req(serial, "IOUT2"); | |
234 | break; | |
235 | case AQ_I2: | |
236 | devc->acq_req = AQ_STATUS; | |
237 | lps_send_req(serial, "STATUS"); | |
238 | break; | |
239 | default: | |
240 | sr_err("Illegal devc->acq_req=%d", devc->acq_req); | |
241 | return SR_ERR; | |
242 | } | |
243 | devc->req_sent_at = g_get_real_time(); | |
244 | devc->acq_req_pending = 1; | |
245 | } | |
246 | ||
247 | return TRUE; | |
248 | } |