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f4816ac6 ML |
1 | /* |
2 | * This file is part of the libsigrok project. | |
3 | * | |
4 | * Copyright (C) 2012 Martin Ling <martin-git@earth.li> | |
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 <stdlib.h> | |
e0b7d23c ML |
21 | #include <stdarg.h> |
22 | #include <unistd.h> | |
23 | #include <errno.h> | |
a3df166f | 24 | #include <string.h> |
f4816ac6 ML |
25 | #include <glib.h> |
26 | #include "libsigrok.h" | |
27 | #include "libsigrok-internal.h" | |
28 | #include "protocol.h" | |
29 | ||
30 | SR_PRIV int rigol_ds1xx2_receive_data(int fd, int revents, void *cb_data) | |
31 | { | |
e0b7d23c | 32 | struct sr_dev_inst *sdi; |
f4816ac6 | 33 | struct dev_context *devc; |
e0b7d23c ML |
34 | struct sr_datafeed_packet packet; |
35 | struct sr_datafeed_analog analog; | |
36 | unsigned char buf[WAVEFORM_SIZE]; | |
37 | float data[WAVEFORM_SIZE]; | |
38 | int len, i; | |
f4816ac6 ML |
39 | |
40 | if (!(sdi = cb_data)) | |
41 | return TRUE; | |
42 | ||
43 | if (!(devc = sdi->priv)) | |
44 | return TRUE; | |
45 | ||
46 | if (revents == G_IO_IN) { | |
e0b7d23c | 47 | len = read(fd, buf, WAVEFORM_SIZE); |
29d957ce | 48 | sr_dbg("Received %d bytes.", len); |
e0b7d23c ML |
49 | if (len == -1) |
50 | return TRUE; | |
75d8a4e5 BV |
51 | |
52 | if (devc->num_frame_samples == 0) { | |
53 | /* Start of a new frame. */ | |
54 | packet.type = SR_DF_FRAME_BEGIN; | |
55 | sr_session_send(sdi, &packet); | |
56 | } | |
57 | ||
e0b7d23c ML |
58 | for (i = 0; i < len; i++) |
59 | data[i] = devc->scale / 25.6 * (128 - buf[i]) - devc->offset; | |
69e19dd7 | 60 | analog.probes = devc->enabled_probes; |
e0b7d23c ML |
61 | analog.num_samples = len; |
62 | analog.data = data; | |
63 | analog.mq = SR_MQ_VOLTAGE; | |
64 | analog.unit = SR_UNIT_VOLT; | |
65 | analog.mqflags = 0; | |
66 | packet.type = SR_DF_ANALOG; | |
67 | packet.payload = &analog; | |
68 | sr_session_send(cb_data, &packet); | |
29d957ce | 69 | |
75d8a4e5 BV |
70 | if (len == WAVEFORM_SIZE) { |
71 | /* End of the frame. */ | |
72 | packet.type = SR_DF_FRAME_END; | |
73 | sr_session_send(sdi, &packet); | |
74 | ||
75 | if (++devc->num_frames == devc->limit_frames) | |
76 | sdi->driver->dev_acquisition_stop(sdi, cb_data); | |
77 | else | |
a3df166f | 78 | rigol_ds1xx2_send_data(fd, ":WAV:DATA?"); |
75d8a4e5 | 79 | } |
f4816ac6 ML |
80 | } |
81 | ||
82 | return TRUE; | |
83 | } | |
e0b7d23c ML |
84 | |
85 | SR_PRIV int rigol_ds1xx2_send_data(int fd, const char *format, ...) | |
86 | { | |
87 | va_list args; | |
88 | char buf[256]; | |
a3df166f | 89 | int len, out, ret; |
29d957ce | 90 | |
e0b7d23c | 91 | va_start(args, format); |
29d957ce | 92 | len = vsprintf(buf, format, args); |
e0b7d23c | 93 | va_end(args); |
a3df166f BV |
94 | strcat(buf, "\n"); |
95 | len++; | |
96 | out = write(fd, buf, len); | |
97 | buf[len - 1] = '\0'; | |
98 | if (out != len) { | |
99 | sr_dbg("Only sent %d/%d bytes of '%s'.", out, len, buf); | |
100 | ret = SR_ERR; | |
101 | } else { | |
102 | sr_dbg("Sent '%s'.", buf); | |
103 | ret = SR_OK; | |
104 | } | |
29d957ce | 105 | |
a3df166f | 106 | return ret; |
e0b7d23c | 107 | } |