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4433145f UH |
1 | /* |
2 | * This file is part of the libsigrok project. | |
3 | * | |
4 | * Copyright (C) 2013 Uwe Hermann <uwe@hermann-uwe.de> | |
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 2 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 | |
2ea1fdf1 | 17 | * along with this program; if not, see <http://www.gnu.org/licenses/>. |
4433145f UH |
18 | */ |
19 | ||
6ec6c43b | 20 | #include <config.h> |
4433145f UH |
21 | #include "protocol.h" |
22 | ||
07ffa5b3 UH |
23 | #define NUM_CHANNELS 4 |
24 | ||
4a8bbed7 | 25 | struct center_info { |
07ffa5b3 | 26 | float temp[NUM_CHANNELS]; |
0a2ffa3e | 27 | int digits[NUM_CHANNELS]; |
4a8bbed7 UH |
28 | gboolean rec, std, max, min, maxmin, t1t2, rel, hold, lowbat, celsius; |
29 | gboolean memfull, autooff; | |
30 | gboolean mode_std, mode_rel, mode_max, mode_min, mode_maxmin; | |
31 | }; | |
32 | ||
33 | static int center_send(struct sr_serial_dev_inst *serial, const char *cmd) | |
4433145f | 34 | { |
4a8bbed7 UH |
35 | int ret; |
36 | ||
84d328ac UH |
37 | if ((ret = serial_write_blocking(serial, cmd, strlen(cmd), |
38 | serial_timeout(serial, strlen(cmd)))) < 0) { | |
4a8bbed7 UH |
39 | sr_err("Error sending '%s' command: %d.", cmd, ret); |
40 | return SR_ERR; | |
41 | } | |
42 | ||
43 | return SR_OK; | |
44 | } | |
45 | ||
46 | SR_PRIV gboolean center_3xx_packet_valid(const uint8_t *buf) | |
47 | { | |
48 | return (buf[0] == 0x02 && buf[44] == 0x03); | |
49 | } | |
50 | ||
51 | static void log_packet(const uint8_t *buf, int idx) | |
52 | { | |
53 | int i; | |
54 | GString *s; | |
55 | ||
56 | s = g_string_sized_new(100); | |
57 | g_string_printf(s, "Packet: "); | |
58 | for (i = 0; i < center_devs[idx].packet_size; i++) | |
59 | g_string_append_printf(s, "%02x ", buf[i]); | |
60 | sr_spew("%s", s->str); | |
61 | g_string_free(s, TRUE); | |
62 | } | |
63 | ||
64 | static int packet_parse(const uint8_t *buf, int idx, struct center_info *info) | |
65 | { | |
66 | int i; | |
67 | uint16_t temp_u16; | |
68 | ||
69 | log_packet(buf, idx); | |
70 | ||
71 | /* Byte 0: Always 0x02. */ | |
72 | ||
73 | /* Byte 1: Various status bits. */ | |
74 | info->rec = (buf[1] & (1 << 0)) != 0; | |
75 | info->mode_std = (((buf[1] >> 1) & 0x3) == 0); | |
76 | info->mode_max = (((buf[1] >> 1) & 0x3) == 1); | |
77 | info->mode_min = (((buf[1] >> 1) & 0x3) == 2); | |
78 | info->mode_maxmin = (((buf[1] >> 1) & 0x3) == 3); | |
79 | /* TODO: Rel. Not available on all models. */ | |
80 | info->t1t2 = (buf[1] & (1 << 3)) != 0; | |
81 | info->rel = (buf[1] & (1 << 4)) != 0; | |
82 | info->hold = (buf[1] & (1 << 5)) != 0; | |
83 | info->lowbat = (buf[1] & (1 << 6)) != 0; | |
84 | info->celsius = (buf[1] & (1 << 7)) != 0; | |
85 | ||
86 | /* Byte 2: Further status bits. */ | |
87 | info->memfull = (buf[2] & (1 << 0)) != 0; | |
88 | info->autooff = (buf[2] & (1 << 7)) != 0; | |
89 | ||
90 | /* Byte 7+8/9+10/11+12/13+14: channel T1/T2/T3/T4 temperature. */ | |
07ffa5b3 | 91 | for (i = 0; i < NUM_CHANNELS; i++) { |
4a8bbed7 UH |
92 | temp_u16 = buf[8 + (i * 2)]; |
93 | temp_u16 |= ((uint16_t)buf[7 + (i * 2)] << 8); | |
94 | info->temp[i] = (float)temp_u16; | |
95 | } | |
96 | ||
97 | /* Byte 43: Specifies whether we need to divide the value(s) by 10. */ | |
07ffa5b3 | 98 | for (i = 0; i < NUM_CHANNELS; i++) { |
4a8bbed7 | 99 | /* Bit = 0: Divide by 10. Bit = 1: Don't divide by 10. */ |
0a2ffa3e | 100 | if ((buf[43] & (1 << i)) == 0) { |
4a8bbed7 | 101 | info->temp[i] /= 10; |
0a2ffa3e AJ |
102 | info->digits[i] = 1; |
103 | } else { | |
104 | info->digits[i] = 0; | |
105 | } | |
4a8bbed7 UH |
106 | } |
107 | ||
108 | /* Bytes 39-42: Overflow/overlimit bits, depending on mode. */ | |
07ffa5b3 | 109 | for (i = 0; i < NUM_CHANNELS; i++) { |
4a8bbed7 UH |
110 | if (info->mode_std && ((buf[39] & (1 << i)) != 0)) |
111 | info->temp[i] = INFINITY; | |
112 | /* TODO: Rel. Not available on all models. */ | |
113 | // if (info->mode_rel && ((buf[40] & (1 << i)) != 0)) | |
114 | // info->temp[i] = INFINITY; | |
115 | if (info->mode_max && ((buf[41] & (1 << i)) != 0)) | |
116 | info->temp[i] = INFINITY; | |
117 | if (info->mode_min && ((buf[42] & (1 << i)) != 0)) | |
118 | info->temp[i] = INFINITY; | |
119 | /* TODO: Minmax? */ | |
120 | } | |
121 | ||
122 | /* Byte 44: Always 0x03. */ | |
123 | ||
124 | return SR_OK; | |
125 | } | |
126 | ||
127 | static int handle_packet(const uint8_t *buf, struct sr_dev_inst *sdi, int idx) | |
128 | { | |
129 | struct sr_datafeed_packet packet; | |
d4f59ce8 UH |
130 | struct sr_datafeed_analog analog; |
131 | struct sr_analog_encoding encoding; | |
132 | struct sr_analog_meaning meaning; | |
133 | struct sr_analog_spec spec; | |
4a8bbed7 UH |
134 | struct dev_context *devc; |
135 | struct center_info info; | |
136 | GSList *l; | |
137 | int i, ret; | |
138 | ||
139 | devc = sdi->priv; | |
4433145f | 140 | |
869c8375 | 141 | /* Note: digits/spec_digits will be overridden later. */ |
d4f59ce8 | 142 | sr_analog_init(&analog, &encoding, &meaning, &spec, 0); |
4a8bbed7 UH |
143 | memset(&info, 0, sizeof(struct center_info)); |
144 | ||
145 | ret = packet_parse(buf, idx, &info); | |
146 | if (ret < 0) { | |
147 | sr_err("Failed to parse packet."); | |
148 | return SR_ERR; | |
149 | } | |
150 | ||
ba7dd8bb | 151 | /* Common values for all 4 channels. */ |
d4f59ce8 | 152 | packet.type = SR_DF_ANALOG; |
4a8bbed7 | 153 | packet.payload = &analog; |
d4f59ce8 UH |
154 | analog.meaning->mq = SR_MQ_TEMPERATURE; |
155 | analog.meaning->unit = (info.celsius) ? SR_UNIT_CELSIUS : SR_UNIT_FAHRENHEIT; | |
4a8bbed7 UH |
156 | analog.num_samples = 1; |
157 | ||
158 | /* Send the values for T1 - T4. */ | |
07ffa5b3 | 159 | for (i = 0; i < NUM_CHANNELS; i++) { |
4a8bbed7 | 160 | l = NULL; |
ba7dd8bb | 161 | l = g_slist_append(l, g_slist_nth_data(sdi->channels, i)); |
d4f59ce8 | 162 | analog.meaning->channels = l; |
0a2ffa3e AJ |
163 | analog.encoding->digits = info.digits[i]; |
164 | analog.spec->spec_digits = info.digits[i]; | |
4a8bbed7 | 165 | analog.data = &(info.temp[i]); |
695dc859 | 166 | sr_session_send(sdi, &packet); |
4a8bbed7 UH |
167 | g_slist_free(l); |
168 | } | |
169 | ||
838f6906 | 170 | sr_sw_limits_update_samples_read(&devc->sw_limits, 1); |
4a8bbed7 UH |
171 | |
172 | return SR_OK; | |
173 | } | |
174 | ||
175 | /* Return TRUE if a full packet was parsed, FALSE otherwise. */ | |
176 | static gboolean handle_new_data(struct sr_dev_inst *sdi, int idx) | |
177 | { | |
178 | struct dev_context *devc; | |
179 | struct sr_serial_dev_inst *serial; | |
0f6ff97b | 180 | int len, offset, ret = FALSE; |
4a8bbed7 UH |
181 | |
182 | devc = sdi->priv; | |
183 | serial = sdi->conn; | |
184 | ||
185 | /* Try to get as much data as the buffer can hold. */ | |
186 | len = SERIAL_BUFSIZE - devc->buflen; | |
3582ce8a | 187 | len = serial_read_nonblocking(serial, devc->buf + devc->buflen, len); |
4a8bbed7 UH |
188 | if (len < 1) { |
189 | sr_err("Serial port read error: %d.", len); | |
190 | return FALSE; | |
191 | } | |
192 | ||
193 | devc->buflen += len; | |
194 | ||
195 | /* Now look for packets in that data. */ | |
0f6ff97b | 196 | offset = 0; |
4a8bbed7 UH |
197 | while ((devc->buflen - offset) >= center_devs[idx].packet_size) { |
198 | if (center_devs[idx].packet_valid(devc->buf + offset)) { | |
199 | handle_packet(devc->buf + offset, sdi, idx); | |
200 | offset += center_devs[idx].packet_size; | |
201 | ret = TRUE; | |
202 | } else { | |
203 | offset++; | |
204 | } | |
205 | } | |
206 | ||
207 | /* If we have any data left, move it to the beginning of our buffer. */ | |
0f6ff97b GS |
208 | if (offset < devc->buflen) |
209 | memmove(devc->buf, devc->buf + offset, devc->buflen - offset); | |
4a8bbed7 UH |
210 | devc->buflen -= offset; |
211 | ||
212 | return ret; | |
213 | } | |
214 | ||
215 | static int receive_data(int fd, int revents, int idx, void *cb_data) | |
216 | { | |
217 | struct sr_dev_inst *sdi; | |
4433145f | 218 | struct dev_context *devc; |
4a8bbed7 UH |
219 | static gboolean request_new_packet = TRUE; |
220 | struct sr_serial_dev_inst *serial; | |
221 | ||
222 | (void)fd; | |
4433145f UH |
223 | |
224 | if (!(sdi = cb_data)) | |
225 | return TRUE; | |
226 | ||
227 | if (!(devc = sdi->priv)) | |
228 | return TRUE; | |
229 | ||
4a8bbed7 UH |
230 | serial = sdi->conn; |
231 | ||
4433145f | 232 | if (revents == G_IO_IN) { |
4a8bbed7 UH |
233 | /* New data arrived. */ |
234 | request_new_packet = handle_new_data(sdi, idx); | |
235 | } else { | |
236 | /* | |
237 | * Timeout. Send "A" to request a packet, but then don't send | |
238 | * further "A" commands until we received a full packet first. | |
239 | */ | |
240 | if (request_new_packet) { | |
241 | center_send(serial, "A"); | |
242 | request_new_packet = FALSE; | |
243 | } | |
244 | } | |
245 | ||
838f6906 | 246 | if (sr_sw_limits_check(&devc->sw_limits)) |
d2f7c417 | 247 | sr_dev_acquisition_stop(sdi); |
4433145f UH |
248 | |
249 | return TRUE; | |
250 | } | |
4a8bbed7 UH |
251 | |
252 | #define RECEIVE_DATA(ID_UPPER) \ | |
253 | SR_PRIV int receive_data_##ID_UPPER(int fd, int revents, void *cb_data) { \ | |
254 | return receive_data(fd, revents, ID_UPPER, cb_data); } | |
255 | ||
256 | /* Driver-specific receive_data() wrappers */ | |
257 | RECEIVE_DATA(CENTER_309) | |
258 | RECEIVE_DATA(VOLTCRAFT_K204) |