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8d9c8554 AJ |
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 | ||
6ec6c43b | 20 | #include <config.h> |
ecaa89af AJ |
21 | #include <string.h> |
22 | #include <math.h> | |
8d9c8554 AJ |
23 | #include "protocol.h" |
24 | ||
ecaa89af AJ |
25 | #define USB_TIMEOUT 500 |
26 | ||
329733d9 | 27 | static const char char_map[128] = { |
ecaa89af AJ |
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, | |
1baf30f5 | 49 | char *temp_unit, int *digits, int flag) |
ecaa89af AJ |
50 | { |
51 | char c, *p = str; | |
52 | int i, ret; | |
53 | ||
1baf30f5 AJ |
54 | *digits = INT_MIN; |
55 | ||
ecaa89af AJ |
56 | if (buf[0] & flag) |
57 | *p++ = '-'; | |
58 | for (i = 0; i < length; i++) { | |
1baf30f5 | 59 | if (i && i < 5 && buf[i+1] & 0x01) { |
ecaa89af | 60 | *p++ = '.'; |
1baf30f5 AJ |
61 | *digits = 0; |
62 | } | |
ecaa89af AJ |
63 | c = char_map[buf[i+1] >> 1]; |
64 | if (i == 5 && (c == 'C' || c == 'F')) | |
65 | *temp_unit = c; | |
1baf30f5 | 66 | else if (c) { |
ecaa89af | 67 | *p++ = c; |
1baf30f5 AJ |
68 | (*digits)++; |
69 | } | |
ecaa89af AJ |
70 | } |
71 | *p = 0; | |
72 | ||
1baf30f5 AJ |
73 | if (*digits < 0) |
74 | *digits = 0; | |
75 | ||
ecaa89af AJ |
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, | |
a46f869b | 85 | struct sr_datafeed_analog *analog) |
ecaa89af AJ |
86 | { |
87 | char str[16], temp_unit; | |
1baf30f5 | 88 | int ret1, ret2, digits[2], over_limit; |
ecaa89af AJ |
89 | |
90 | ret1 = brymen_bm86x_parse_digits(buf+2, 6, str, &floatval[0], | |
1baf30f5 | 91 | &temp_unit, &digits[0], 0x80); |
ecaa89af AJ |
92 | over_limit = strstr(str, "0L") || strstr(str, "0.L"); |
93 | ret2 = brymen_bm86x_parse_digits(buf+9, 4, str, &floatval[1], | |
1baf30f5 | 94 | &temp_unit, &digits[1], 0x10); |
ecaa89af AJ |
95 | |
96 | /* main display */ | |
97 | if (ret1 == SR_OK || over_limit) { | |
98 | /* SI unit */ | |
99 | if (buf[8] & 0x01) { | |
a46f869b UH |
100 | analog[0].meaning->mq = SR_MQ_VOLTAGE; |
101 | analog[0].meaning->unit = SR_UNIT_VOLT; | |
ecaa89af | 102 | if (!strcmp(str, "diod")) |
a46f869b | 103 | analog[0].meaning->mqflags |= SR_MQFLAG_DIODE; |
ecaa89af | 104 | } else if (buf[14] & 0x80) { |
a46f869b UH |
105 | analog[0].meaning->mq = SR_MQ_CURRENT; |
106 | analog[0].meaning->unit = SR_UNIT_AMPERE; | |
ecaa89af | 107 | } else if (buf[14] & 0x20) { |
a46f869b UH |
108 | analog[0].meaning->mq = SR_MQ_CAPACITANCE; |
109 | analog[0].meaning->unit = SR_UNIT_FARAD; | |
ecaa89af | 110 | } else if (buf[14] & 0x10) { |
a46f869b UH |
111 | analog[0].meaning->mq = SR_MQ_CONDUCTANCE; |
112 | analog[0].meaning->unit = SR_UNIT_SIEMENS; | |
ecaa89af | 113 | } else if (buf[15] & 0x01) { |
a46f869b UH |
114 | analog[0].meaning->mq = SR_MQ_FREQUENCY; |
115 | analog[0].meaning->unit = SR_UNIT_HERTZ; | |
ecaa89af | 116 | } else if (buf[10] & 0x01) { |
a46f869b UH |
117 | analog[0].meaning->mq = SR_MQ_CONTINUITY; |
118 | analog[0].meaning->unit = SR_UNIT_OHM; | |
ecaa89af | 119 | } else if (buf[15] & 0x10) { |
a46f869b UH |
120 | analog[0].meaning->mq = SR_MQ_RESISTANCE; |
121 | analog[0].meaning->unit = SR_UNIT_OHM; | |
ecaa89af | 122 | } else if (buf[15] & 0x02) { |
a46f869b UH |
123 | analog[0].meaning->mq = SR_MQ_POWER; |
124 | analog[0].meaning->unit = SR_UNIT_DECIBEL_MW; | |
ecaa89af | 125 | } else if (buf[15] & 0x80) { |
a46f869b UH |
126 | analog[0].meaning->mq = SR_MQ_DUTY_CYCLE; |
127 | analog[0].meaning->unit = SR_UNIT_PERCENTAGE; | |
ecaa89af | 128 | } else if (buf[ 2] & 0x0A) { |
a46f869b | 129 | analog[0].meaning->mq = SR_MQ_TEMPERATURE; |
ecaa89af | 130 | if (temp_unit == 'F') |
a46f869b | 131 | analog[0].meaning->unit = SR_UNIT_FAHRENHEIT; |
ecaa89af | 132 | else |
a46f869b | 133 | analog[0].meaning->unit = SR_UNIT_CELSIUS; |
ecaa89af AJ |
134 | } |
135 | ||
136 | /* when MIN MAX and AVG are displayed at the same time, remove them */ | |
137 | if ((buf[1] & 0xE0) == 0xE0) | |
138 | buf[1] &= ~0xE0; | |
139 | ||
140 | /* AC/DC/Auto flags */ | |
a46f869b UH |
141 | if (buf[1] & 0x10) analog[0].meaning->mqflags |= SR_MQFLAG_DC; |
142 | if (buf[2] & 0x01) analog[0].meaning->mqflags |= SR_MQFLAG_AC; | |
143 | if (buf[1] & 0x01) analog[0].meaning->mqflags |= SR_MQFLAG_AUTORANGE; | |
144 | if (buf[1] & 0x08) analog[0].meaning->mqflags |= SR_MQFLAG_HOLD; | |
145 | if (buf[1] & 0x20) analog[0].meaning->mqflags |= SR_MQFLAG_MAX; | |
146 | if (buf[1] & 0x40) analog[0].meaning->mqflags |= SR_MQFLAG_MIN; | |
147 | if (buf[1] & 0x80) analog[0].meaning->mqflags |= SR_MQFLAG_AVG; | |
148 | if (buf[3] & 0x01) analog[0].meaning->mqflags |= SR_MQFLAG_RELATIVE; | |
ecaa89af AJ |
149 | |
150 | /* when dBm is displayed, remove the m suffix so that it is | |
151 | not considered as the 10e-3 SI prefix */ | |
152 | if (buf[15] & 0x02) | |
153 | buf[15] &= ~0x04; | |
154 | ||
155 | /* SI prefix */ | |
d9251a2c UH |
156 | if (buf[14] & 0x40) { floatval[0] *= 1e-9; digits[0] += 9; } /* n */ |
157 | if (buf[15] & 0x08) { floatval[0] *= 1e-6; digits[0] += 6; } /* µ */ | |
158 | if (buf[15] & 0x04) { floatval[0] *= 1e-3; digits[0] += 3; } /* m */ | |
159 | if (buf[15] & 0x40) { floatval[0] *= 1e3; digits[0] -= 3; } /* k */ | |
160 | if (buf[15] & 0x20) { floatval[0] *= 1e6; digits[0] -= 6; } /* M */ | |
ecaa89af AJ |
161 | |
162 | if (over_limit) floatval[0] = INFINITY; | |
1baf30f5 AJ |
163 | |
164 | analog[0].encoding->digits = digits[0]; | |
165 | analog[0].spec->spec_digits = digits[0]; | |
ecaa89af AJ |
166 | } |
167 | ||
168 | /* secondary display */ | |
169 | if (ret2 == SR_OK) { | |
170 | /* SI unit */ | |
171 | if (buf[14] & 0x08) { | |
a46f869b UH |
172 | analog[1].meaning->mq = SR_MQ_VOLTAGE; |
173 | analog[1].meaning->unit = SR_UNIT_VOLT; | |
ecaa89af | 174 | } else if (buf[9] & 0x04) { |
a46f869b UH |
175 | analog[1].meaning->mq = SR_MQ_CURRENT; |
176 | analog[1].meaning->unit = SR_UNIT_AMPERE; | |
af1e487e | 177 | } else if (buf[9] & 0x08) { |
a46f869b UH |
178 | analog[1].meaning->mq = SR_MQ_CURRENT; |
179 | analog[1].meaning->unit = SR_UNIT_PERCENTAGE; | |
ecaa89af | 180 | } else if (buf[14] & 0x04) { |
a46f869b UH |
181 | analog[1].meaning->mq = SR_MQ_FREQUENCY; |
182 | analog[1].meaning->unit = SR_UNIT_HERTZ; | |
ecaa89af | 183 | } else if (buf[9] & 0x40) { |
a46f869b | 184 | analog[1].meaning->mq = SR_MQ_TEMPERATURE; |
ecaa89af | 185 | if (temp_unit == 'F') |
a46f869b | 186 | analog[1].meaning->unit = SR_UNIT_FAHRENHEIT; |
ecaa89af | 187 | else |
a46f869b | 188 | analog[1].meaning->unit = SR_UNIT_CELSIUS; |
ecaa89af AJ |
189 | } |
190 | ||
191 | /* AC flag */ | |
a46f869b | 192 | if (buf[9] & 0x20) analog[1].meaning->mqflags |= SR_MQFLAG_AC; |
ecaa89af AJ |
193 | |
194 | /* SI prefix */ | |
d9251a2c UH |
195 | if (buf[ 9] & 0x01) { floatval[1] *= 1e-6; digits[1] += 6; } /* µ */ |
196 | if (buf[ 9] & 0x02) { floatval[1] *= 1e-3; digits[1] += 3; } /* m */ | |
197 | if (buf[14] & 0x02) { floatval[1] *= 1e3; digits[1] -= 3; } /* k */ | |
198 | if (buf[14] & 0x01) { floatval[1] *= 1e6; digits[1] -= 6; } /* M */ | |
1baf30f5 AJ |
199 | |
200 | analog[1].encoding->digits = digits[1]; | |
201 | analog[1].spec->spec_digits = digits[1]; | |
ecaa89af AJ |
202 | } |
203 | ||
204 | if (buf[9] & 0x80) | |
205 | sr_spew("Battery is low."); | |
206 | } | |
207 | ||
208 | static void brymen_bm86x_handle_packet(const struct sr_dev_inst *sdi, | |
209 | unsigned char *buf) | |
210 | { | |
211 | struct dev_context *devc; | |
212 | struct sr_datafeed_packet packet; | |
a46f869b UH |
213 | struct sr_datafeed_analog analog[2]; |
214 | struct sr_analog_encoding encoding[2]; | |
215 | struct sr_analog_meaning meaning[2]; | |
216 | struct sr_analog_spec spec[2]; | |
ecaa89af AJ |
217 | float floatval[2]; |
218 | ||
219 | devc = sdi->priv; | |
220 | ||
869c8375 | 221 | /* Note: digits/spec_digits will be overridden later. */ |
a46f869b UH |
222 | sr_analog_init(&analog[0], &encoding[0], &meaning[0], &spec[0], 0); |
223 | sr_analog_init(&analog[1], &encoding[1], &meaning[1], &spec[1], 0); | |
ecaa89af | 224 | |
ecaa89af AJ |
225 | brymen_bm86x_parse(buf, floatval, analog); |
226 | ||
a46f869b | 227 | if (analog[0].meaning->mq != 0) { |
ecaa89af AJ |
228 | /* Got a measurement. */ |
229 | analog[0].num_samples = 1; | |
230 | analog[0].data = &floatval[0]; | |
a46f869b UH |
231 | analog[0].meaning->channels = g_slist_append(NULL, sdi->channels->data); |
232 | packet.type = SR_DF_ANALOG; | |
ecaa89af | 233 | packet.payload = &analog[0]; |
102f1239 | 234 | sr_session_send(sdi, &packet); |
a46f869b | 235 | g_slist_free(analog[0].meaning->channels); |
ecaa89af AJ |
236 | } |
237 | ||
a46f869b | 238 | if (analog[1].meaning->mq != 0) { |
ecaa89af AJ |
239 | /* Got a measurement. */ |
240 | analog[1].num_samples = 1; | |
241 | analog[1].data = &floatval[1]; | |
a46f869b UH |
242 | analog[1].meaning->channels = g_slist_append(NULL, sdi->channels->next->data); |
243 | packet.type = SR_DF_ANALOG; | |
ecaa89af | 244 | packet.payload = &analog[1]; |
102f1239 | 245 | sr_session_send(sdi, &packet); |
a46f869b | 246 | g_slist_free(analog[1].meaning->channels); |
ecaa89af AJ |
247 | } |
248 | ||
a46f869b | 249 | if (analog[0].meaning->mq != 0 || analog[1].meaning->mq != 0) |
ab939ebb | 250 | sr_sw_limits_update_samples_read(&devc->sw_limits, 1); |
ecaa89af AJ |
251 | } |
252 | ||
253 | static int brymen_bm86x_send_command(const struct sr_dev_inst *sdi) | |
254 | { | |
255 | struct sr_usb_dev_inst *usb; | |
256 | unsigned char buf[] = { 0x00, 0x86, 0x66 }; | |
257 | int ret; | |
258 | ||
259 | usb = sdi->conn; | |
260 | ||
261 | sr_dbg("Sending HID set report."); | |
262 | ret = libusb_control_transfer(usb->devhdl, | |
d9251a2c | 263 | LIBUSB_REQUEST_TYPE_CLASS | |
ecaa89af AJ |
264 | LIBUSB_RECIPIENT_INTERFACE | |
265 | LIBUSB_ENDPOINT_OUT, | |
266 | 9, /* bRequest: HID set_report */ | |
267 | 0x300, /* wValue: HID feature, report num 0 */ | |
268 | 0, /* wIndex: interface 0 */ | |
269 | buf, sizeof(buf), USB_TIMEOUT); | |
270 | ||
271 | if (ret < 0) { | |
272 | sr_err("HID feature report error: %s.", libusb_error_name(ret)); | |
273 | return SR_ERR; | |
274 | } | |
275 | ||
276 | if (ret != sizeof(buf)) { | |
0c536bcd | 277 | sr_err("Short packet: sent %d/%zu bytes.", ret, sizeof(buf)); |
ecaa89af AJ |
278 | return SR_ERR; |
279 | } | |
280 | ||
281 | return SR_OK; | |
282 | } | |
283 | ||
284 | static int brymen_bm86x_read_interrupt(const struct sr_dev_inst *sdi) | |
285 | { | |
286 | struct dev_context *devc; | |
287 | struct sr_usb_dev_inst *usb; | |
288 | unsigned char buf[24]; | |
289 | int ret, transferred; | |
290 | ||
291 | devc = sdi->priv; | |
292 | usb = sdi->conn; | |
293 | ||
294 | sr_dbg("Reading HID interrupt report."); | |
295 | /* Get data from EP1 using an interrupt transfer. */ | |
296 | ret = libusb_interrupt_transfer(usb->devhdl, | |
297 | LIBUSB_ENDPOINT_IN | 1, /* EP1, IN */ | |
298 | buf, sizeof(buf), | |
299 | &transferred, USB_TIMEOUT); | |
300 | ||
301 | if (ret == LIBUSB_ERROR_TIMEOUT) { | |
302 | if (++devc->interrupt_pending > 3) | |
303 | devc->interrupt_pending = 0; | |
304 | return SR_OK; | |
305 | } | |
306 | ||
307 | if (ret < 0) { | |
308 | sr_err("USB receive error: %s.", libusb_error_name(ret)); | |
309 | return SR_ERR; | |
310 | } | |
311 | ||
312 | if (transferred != sizeof(buf)) { | |
6433156c | 313 | sr_err("Short packet: received %d/%zu bytes.", transferred, sizeof(buf)); |
ecaa89af AJ |
314 | return SR_ERR; |
315 | } | |
316 | ||
317 | devc->interrupt_pending = 0; | |
318 | brymen_bm86x_handle_packet(sdi, buf); | |
319 | ||
320 | return SR_OK; | |
321 | } | |
322 | ||
8d9c8554 AJ |
323 | SR_PRIV int brymen_bm86x_receive_data(int fd, int revents, void *cb_data) |
324 | { | |
ecaa89af | 325 | struct sr_dev_inst *sdi; |
8d9c8554 AJ |
326 | struct dev_context *devc; |
327 | ||
328 | (void)fd; | |
ecaa89af | 329 | (void)revents; |
8d9c8554 AJ |
330 | |
331 | if (!(sdi = cb_data)) | |
332 | return TRUE; | |
333 | ||
334 | if (!(devc = sdi->priv)) | |
335 | return TRUE; | |
336 | ||
ecaa89af AJ |
337 | if (!devc->interrupt_pending) { |
338 | if (brymen_bm86x_send_command(sdi)) | |
339 | return FALSE; | |
340 | devc->interrupt_pending = 1; | |
341 | } | |
342 | ||
343 | if (brymen_bm86x_read_interrupt(sdi)) | |
344 | return FALSE; | |
345 | ||
ab939ebb | 346 | if (sr_sw_limits_check(&devc->sw_limits)) |
695dc859 | 347 | sdi->driver->dev_acquisition_stop(sdi); |
8d9c8554 AJ |
348 | |
349 | return TRUE; | |
350 | } |