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1 | /* | |
2 | * This file is part of the libsigrok project. | |
3 | * | |
4 | * Copyright (C) 2014 Aurelien Jacobs <aurel@gnuage.org> | |
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 <config.h> | |
21 | #include <string.h> | |
22 | #include <math.h> | |
23 | #include "protocol.h" | |
24 | ||
25 | #define USB_TIMEOUT 500 | |
26 | ||
27 | static const char char_map[128] = { | |
28 | [0x20] = '-', | |
29 | [0x5F] = '0', | |
30 | [0x50] = '1', | |
31 | [0x6D] = '2', | |
32 | [0x7C] = '3', | |
33 | [0x72] = '4', | |
34 | [0x3E] = '5', | |
35 | [0x3F] = '6', | |
36 | [0x54] = '7', | |
37 | [0x7F] = '8', | |
38 | [0x7E] = '9', | |
39 | [0x0F] = 'C', | |
40 | [0x27] = 'F', | |
41 | [0x0B] = 'L', | |
42 | [0x79] = 'd', | |
43 | [0x10] = 'i', | |
44 | [0x39] = 'o', | |
45 | }; | |
46 | ||
47 | static int brymen_bm86x_parse_digits(const unsigned char *buf, int length, | |
48 | char *str, float *floatval, | |
49 | char *temp_unit, int *digits, int flag) | |
50 | { | |
51 | char c, *p = str; | |
52 | int i, ret; | |
53 | ||
54 | *digits = INT_MIN; | |
55 | ||
56 | if (buf[0] & flag) | |
57 | *p++ = '-'; | |
58 | for (i = 0; i < length; i++) { | |
59 | if (i && i < 5 && buf[i+1] & 0x01) { | |
60 | *p++ = '.'; | |
61 | *digits = 0; | |
62 | } | |
63 | c = char_map[buf[i+1] >> 1]; | |
64 | if (i == 5 && (c == 'C' || c == 'F')) | |
65 | *temp_unit = c; | |
66 | else if (c) { | |
67 | *p++ = c; | |
68 | (*digits)++; | |
69 | } | |
70 | } | |
71 | *p = 0; | |
72 | ||
73 | if (*digits < 0) | |
74 | *digits = 0; | |
75 | ||
76 | if ((ret = sr_atof_ascii(str, floatval))) { | |
77 | sr_dbg("invalid float string: '%s'", str); | |
78 | return ret; | |
79 | } | |
80 | ||
81 | return SR_OK; | |
82 | } | |
83 | ||
84 | static void brymen_bm86x_parse(unsigned char *buf, float *floatval, | |
85 | struct sr_datafeed_analog *analog) | |
86 | { | |
87 | char str[16], temp_unit; | |
88 | int ret1, ret2, digits[2], over_limit; | |
89 | ||
90 | ret1 = brymen_bm86x_parse_digits(buf+2, 6, str, &floatval[0], | |
91 | &temp_unit, &digits[0], 0x80); | |
92 | over_limit = strstr(str, "0L") || strstr(str, "0.L"); | |
93 | ret2 = brymen_bm86x_parse_digits(buf+9, 4, str, &floatval[1], | |
94 | &temp_unit, &digits[1], 0x10); | |
95 | ||
96 | /* main display */ | |
97 | if (ret1 == SR_OK || over_limit) { | |
98 | /* SI unit */ | |
99 | if (buf[8] & 0x01) { | |
100 | analog[0].meaning->mq = SR_MQ_VOLTAGE; | |
101 | analog[0].meaning->unit = SR_UNIT_VOLT; | |
102 | if (!strcmp(str, "diod")) { | |
103 | analog[0].meaning->mqflags |= SR_MQFLAG_DIODE; | |
104 | analog[0].meaning->mqflags |= SR_MQFLAG_DC; | |
105 | } | |
106 | } else if (buf[14] & 0x80) { | |
107 | analog[0].meaning->mq = SR_MQ_CURRENT; | |
108 | analog[0].meaning->unit = SR_UNIT_AMPERE; | |
109 | } else if (buf[14] & 0x20) { | |
110 | analog[0].meaning->mq = SR_MQ_CAPACITANCE; | |
111 | analog[0].meaning->unit = SR_UNIT_FARAD; | |
112 | } else if (buf[14] & 0x10) { | |
113 | analog[0].meaning->mq = SR_MQ_CONDUCTANCE; | |
114 | analog[0].meaning->unit = SR_UNIT_SIEMENS; | |
115 | } else if (buf[15] & 0x01) { | |
116 | analog[0].meaning->mq = SR_MQ_FREQUENCY; | |
117 | analog[0].meaning->unit = SR_UNIT_HERTZ; | |
118 | } else if (buf[10] & 0x01) { | |
119 | analog[0].meaning->mq = SR_MQ_CONTINUITY; | |
120 | analog[0].meaning->unit = SR_UNIT_OHM; | |
121 | } else if (buf[15] & 0x10) { | |
122 | analog[0].meaning->mq = SR_MQ_RESISTANCE; | |
123 | analog[0].meaning->unit = SR_UNIT_OHM; | |
124 | } else if (buf[15] & 0x02) { | |
125 | analog[0].meaning->mq = SR_MQ_POWER; | |
126 | analog[0].meaning->unit = SR_UNIT_DECIBEL_MW; | |
127 | } else if (buf[15] & 0x80) { | |
128 | analog[0].meaning->mq = SR_MQ_DUTY_CYCLE; | |
129 | analog[0].meaning->unit = SR_UNIT_PERCENTAGE; | |
130 | } else if (buf[ 2] & 0x0A) { | |
131 | analog[0].meaning->mq = SR_MQ_TEMPERATURE; | |
132 | if (temp_unit == 'F') | |
133 | analog[0].meaning->unit = SR_UNIT_FAHRENHEIT; | |
134 | else | |
135 | analog[0].meaning->unit = SR_UNIT_CELSIUS; | |
136 | } | |
137 | ||
138 | /* when MIN MAX and AVG are displayed at the same time, remove them */ | |
139 | if ((buf[1] & 0xE0) == 0xE0) | |
140 | buf[1] &= ~0xE0; | |
141 | ||
142 | /* AC/DC/Auto flags */ | |
143 | if (buf[1] & 0x10) analog[0].meaning->mqflags |= SR_MQFLAG_DC; | |
144 | if (buf[2] & 0x01) analog[0].meaning->mqflags |= SR_MQFLAG_AC; | |
145 | if (buf[1] & 0x01) analog[0].meaning->mqflags |= SR_MQFLAG_AUTORANGE; | |
146 | if (buf[1] & 0x08) analog[0].meaning->mqflags |= SR_MQFLAG_HOLD; | |
147 | if (buf[1] & 0x20) analog[0].meaning->mqflags |= SR_MQFLAG_MAX; | |
148 | if (buf[1] & 0x40) analog[0].meaning->mqflags |= SR_MQFLAG_MIN; | |
149 | if (buf[1] & 0x80) analog[0].meaning->mqflags |= SR_MQFLAG_AVG; | |
150 | if (buf[3] & 0x01) analog[0].meaning->mqflags |= SR_MQFLAG_RELATIVE; | |
151 | ||
152 | /* when dBm is displayed, remove the m suffix so that it is | |
153 | not considered as the 10e-3 SI prefix */ | |
154 | if (buf[15] & 0x02) | |
155 | buf[15] &= ~0x04; | |
156 | ||
157 | /* SI prefix */ | |
158 | if (buf[14] & 0x40) { floatval[0] *= 1e-9; digits[0] += 9; } /* n */ | |
159 | if (buf[15] & 0x08) { floatval[0] *= 1e-6; digits[0] += 6; } /* µ */ | |
160 | if (buf[15] & 0x04) { floatval[0] *= 1e-3; digits[0] += 3; } /* m */ | |
161 | if (buf[15] & 0x40) { floatval[0] *= 1e3; digits[0] -= 3; } /* k */ | |
162 | if (buf[15] & 0x20) { floatval[0] *= 1e6; digits[0] -= 6; } /* M */ | |
163 | ||
164 | if (over_limit) floatval[0] = INFINITY; | |
165 | ||
166 | analog[0].encoding->digits = digits[0]; | |
167 | analog[0].spec->spec_digits = digits[0]; | |
168 | } | |
169 | ||
170 | /* secondary display */ | |
171 | if (ret2 == SR_OK) { | |
172 | /* SI unit */ | |
173 | if (buf[14] & 0x08) { | |
174 | analog[1].meaning->mq = SR_MQ_VOLTAGE; | |
175 | analog[1].meaning->unit = SR_UNIT_VOLT; | |
176 | } else if (buf[9] & 0x04) { | |
177 | analog[1].meaning->mq = SR_MQ_CURRENT; | |
178 | analog[1].meaning->unit = SR_UNIT_AMPERE; | |
179 | } else if (buf[9] & 0x08) { | |
180 | analog[1].meaning->mq = SR_MQ_CURRENT; | |
181 | analog[1].meaning->unit = SR_UNIT_PERCENTAGE; | |
182 | } else if (buf[14] & 0x04) { | |
183 | analog[1].meaning->mq = SR_MQ_FREQUENCY; | |
184 | analog[1].meaning->unit = SR_UNIT_HERTZ; | |
185 | } else if (buf[9] & 0x40) { | |
186 | analog[1].meaning->mq = SR_MQ_TEMPERATURE; | |
187 | if (temp_unit == 'F') | |
188 | analog[1].meaning->unit = SR_UNIT_FAHRENHEIT; | |
189 | else | |
190 | analog[1].meaning->unit = SR_UNIT_CELSIUS; | |
191 | } | |
192 | ||
193 | /* AC flag */ | |
194 | if (buf[9] & 0x20) analog[1].meaning->mqflags |= SR_MQFLAG_AC; | |
195 | ||
196 | /* SI prefix */ | |
197 | if (buf[ 9] & 0x01) { floatval[1] *= 1e-6; digits[1] += 6; } /* µ */ | |
198 | if (buf[ 9] & 0x02) { floatval[1] *= 1e-3; digits[1] += 3; } /* m */ | |
199 | if (buf[14] & 0x02) { floatval[1] *= 1e3; digits[1] -= 3; } /* k */ | |
200 | if (buf[14] & 0x01) { floatval[1] *= 1e6; digits[1] -= 6; } /* M */ | |
201 | ||
202 | analog[1].encoding->digits = digits[1]; | |
203 | analog[1].spec->spec_digits = digits[1]; | |
204 | } | |
205 | ||
206 | if (buf[9] & 0x80) | |
207 | sr_spew("Battery is low."); | |
208 | } | |
209 | ||
210 | static void brymen_bm86x_handle_packet(const struct sr_dev_inst *sdi, | |
211 | unsigned char *buf) | |
212 | { | |
213 | struct dev_context *devc; | |
214 | struct sr_datafeed_packet packet; | |
215 | struct sr_datafeed_analog analog[2]; | |
216 | struct sr_analog_encoding encoding[2]; | |
217 | struct sr_analog_meaning meaning[2]; | |
218 | struct sr_analog_spec spec[2]; | |
219 | struct sr_channel *channel; | |
220 | int sent_ch1, sent_ch2; | |
221 | float floatval[2]; | |
222 | ||
223 | devc = sdi->priv; | |
224 | ||
225 | /* Note: digits/spec_digits will be overridden later. */ | |
226 | sr_analog_init(&analog[0], &encoding[0], &meaning[0], &spec[0], 0); | |
227 | sr_analog_init(&analog[1], &encoding[1], &meaning[1], &spec[1], 0); | |
228 | ||
229 | brymen_bm86x_parse(buf, floatval, analog); | |
230 | sent_ch1 = sent_ch2 = 0; | |
231 | ||
232 | channel = sdi->channels->data; | |
233 | if (analog[0].meaning->mq != 0 && channel->enabled) { | |
234 | /* Got a measurement. */ | |
235 | sent_ch1 = 1; | |
236 | analog[0].num_samples = 1; | |
237 | analog[0].data = &floatval[0]; | |
238 | analog[0].meaning->channels = g_slist_append(NULL, channel); | |
239 | packet.type = SR_DF_ANALOG; | |
240 | packet.payload = &analog[0]; | |
241 | sr_session_send(sdi, &packet); | |
242 | g_slist_free(analog[0].meaning->channels); | |
243 | } | |
244 | ||
245 | channel = sdi->channels->next->data; | |
246 | if (analog[1].meaning->mq != 0 && channel->enabled) { | |
247 | /* Got a measurement. */ | |
248 | sent_ch2 = 1; | |
249 | analog[1].num_samples = 1; | |
250 | analog[1].data = &floatval[1]; | |
251 | analog[1].meaning->channels = g_slist_append(NULL, channel); | |
252 | packet.type = SR_DF_ANALOG; | |
253 | packet.payload = &analog[1]; | |
254 | sr_session_send(sdi, &packet); | |
255 | g_slist_free(analog[1].meaning->channels); | |
256 | } | |
257 | ||
258 | if (sent_ch1 || sent_ch2) | |
259 | sr_sw_limits_update_samples_read(&devc->sw_limits, 1); | |
260 | } | |
261 | ||
262 | static int brymen_bm86x_send_command(const struct sr_dev_inst *sdi) | |
263 | { | |
264 | struct sr_usb_dev_inst *usb; | |
265 | unsigned char buf[] = { 0x00, 0x86, 0x66 }; | |
266 | int ret; | |
267 | ||
268 | usb = sdi->conn; | |
269 | ||
270 | sr_dbg("Sending HID set report."); | |
271 | ret = libusb_control_transfer(usb->devhdl, | |
272 | LIBUSB_REQUEST_TYPE_CLASS | | |
273 | LIBUSB_RECIPIENT_INTERFACE | | |
274 | LIBUSB_ENDPOINT_OUT, | |
275 | 9, /* bRequest: HID set_report */ | |
276 | 0x300, /* wValue: HID feature, report num 0 */ | |
277 | 0, /* wIndex: interface 0 */ | |
278 | buf, sizeof(buf), USB_TIMEOUT); | |
279 | ||
280 | if (ret < 0) { | |
281 | sr_err("HID feature report error: %s.", libusb_error_name(ret)); | |
282 | return SR_ERR; | |
283 | } | |
284 | ||
285 | if (ret != sizeof(buf)) { | |
286 | sr_err("Short packet: sent %d/%zu bytes.", ret, sizeof(buf)); | |
287 | return SR_ERR; | |
288 | } | |
289 | ||
290 | return SR_OK; | |
291 | } | |
292 | ||
293 | static int brymen_bm86x_read_interrupt(const struct sr_dev_inst *sdi) | |
294 | { | |
295 | struct dev_context *devc; | |
296 | struct sr_usb_dev_inst *usb; | |
297 | unsigned char buf[24]; | |
298 | int ret, transferred; | |
299 | ||
300 | devc = sdi->priv; | |
301 | usb = sdi->conn; | |
302 | ||
303 | sr_dbg("Reading HID interrupt report."); | |
304 | /* Get data from EP1 using an interrupt transfer. */ | |
305 | ret = libusb_interrupt_transfer(usb->devhdl, | |
306 | LIBUSB_ENDPOINT_IN | 1, /* EP1, IN */ | |
307 | buf, sizeof(buf), | |
308 | &transferred, USB_TIMEOUT); | |
309 | ||
310 | if (ret == LIBUSB_ERROR_TIMEOUT) { | |
311 | if (++devc->interrupt_pending > 3) | |
312 | devc->interrupt_pending = 0; | |
313 | return SR_OK; | |
314 | } | |
315 | ||
316 | if (ret < 0) { | |
317 | sr_err("USB receive error: %s.", libusb_error_name(ret)); | |
318 | return SR_ERR; | |
319 | } | |
320 | ||
321 | if (transferred != sizeof(buf)) { | |
322 | sr_err("Short packet: received %d/%zu bytes.", transferred, sizeof(buf)); | |
323 | return SR_ERR; | |
324 | } | |
325 | ||
326 | devc->interrupt_pending = 0; | |
327 | brymen_bm86x_handle_packet(sdi, buf); | |
328 | ||
329 | return SR_OK; | |
330 | } | |
331 | ||
332 | SR_PRIV int brymen_bm86x_receive_data(int fd, int revents, void *cb_data) | |
333 | { | |
334 | struct sr_dev_inst *sdi; | |
335 | struct dev_context *devc; | |
336 | ||
337 | (void)fd; | |
338 | (void)revents; | |
339 | ||
340 | if (!(sdi = cb_data)) | |
341 | return TRUE; | |
342 | ||
343 | if (!(devc = sdi->priv)) | |
344 | return TRUE; | |
345 | ||
346 | if (!devc->interrupt_pending) { | |
347 | if (brymen_bm86x_send_command(sdi)) | |
348 | return FALSE; | |
349 | devc->interrupt_pending = 1; | |
350 | } | |
351 | ||
352 | if (brymen_bm86x_read_interrupt(sdi)) | |
353 | return FALSE; | |
354 | ||
355 | if (sr_sw_limits_check(&devc->sw_limits)) | |
356 | sr_dev_acquisition_stop(sdi); | |
357 | ||
358 | return TRUE; | |
359 | } |