]>
Commit | Line | Data |
---|---|---|
83e9d586 UH |
1 | /* |
2 | * This file is part of the sigrok project. | |
3 | * | |
4 | * Copyright (C) 2011 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 | |
17 | * along with this program; if not, write to the Free Software | |
18 | * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA | |
19 | */ | |
20 | ||
21 | #include <stdlib.h> | |
22 | #include <fcntl.h> | |
23 | #include <unistd.h> | |
cd315a80 UH |
24 | #include "sigrok.h" |
25 | #include "sigrok-internal.h" | |
83e9d586 UH |
26 | |
27 | #define NUM_PACKETS 2048 | |
28 | #define PACKET_SIZE 4096 | |
29 | #define DEFAULT_NUM_PROBES 8 | |
30 | ||
31 | /** | |
32 | * Convert the LA8 'divcount' value to the respective samplerate (in Hz). | |
33 | * | |
34 | * LA8 hardware: sample period = (divcount + 1) * 10ns. | |
35 | * Min. value for divcount: 0x00 (10ns sample period, 100MHz samplerate). | |
36 | * Max. value for divcount: 0xfe (2550ns sample period, 392.15kHz samplerate). | |
37 | * | |
38 | * @param divcount The divcount value as needed by the hardware. | |
44dae539 | 39 | * |
83e9d586 UH |
40 | * @return The samplerate in Hz, or 0xffffffffffffffff upon errors. |
41 | */ | |
42 | static uint64_t divcount_to_samplerate(uint8_t divcount) | |
43 | { | |
44 | if (divcount == 0xff) | |
45 | return 0xffffffffffffffffULL; | |
46 | ||
47 | return SR_MHZ(100) / (divcount + 1); | |
48 | } | |
49 | ||
50 | static int format_match(const char *filename) | |
51 | { | |
52 | if (!filename) { | |
7b48d6e1 | 53 | sr_err("la8 in: %s: filename was NULL", __func__); |
83e9d586 UH |
54 | // return SR_ERR; /* FIXME */ |
55 | return FALSE; | |
56 | } | |
57 | ||
58 | if (!g_file_test(filename, G_FILE_TEST_EXISTS)) { | |
7b48d6e1 | 59 | sr_err("la8 in: %s: input file '%s' does not exist", |
133a37bf | 60 | __func__, filename); |
83e9d586 UH |
61 | // return SR_ERR; /* FIXME */ |
62 | return FALSE; | |
63 | } | |
64 | ||
65 | if (!g_file_test(filename, G_FILE_TEST_IS_REGULAR)) { | |
7b48d6e1 | 66 | sr_err("la8 in: %s: input file '%s' not a regular file", |
133a37bf | 67 | __func__, filename); |
83e9d586 UH |
68 | // return SR_ERR; /* FIXME */ |
69 | return FALSE; | |
70 | } | |
71 | ||
72 | /* TODO: Only accept files of length 8MB + 5 bytes. */ | |
73 | ||
74 | /* TODO: Check for divcount != 0xff. */ | |
75 | ||
76 | return TRUE; | |
77 | } | |
78 | ||
79 | static int init(struct sr_input *in) | |
80 | { | |
464d12c7 | 81 | int num_probes, i; |
c37d2b1b | 82 | char name[SR_MAX_PROBENAME_LEN + 1]; |
83e9d586 UH |
83 | |
84 | if (in->param && in->param[0]) { | |
85 | num_probes = strtoul(in->param, NULL, 10); | |
86 | if (num_probes < 1) { | |
7b48d6e1 | 87 | sr_err("la8 in: %s: strtoul failed", __func__); |
83e9d586 UH |
88 | return SR_ERR; |
89 | } | |
90 | } else { | |
91 | num_probes = DEFAULT_NUM_PROBES; | |
92 | } | |
93 | ||
94 | /* Create a virtual device. */ | |
bb7ef793 | 95 | in->vdev = sr_dev_new(NULL, 0); |
464d12c7 KS |
96 | |
97 | for (i = 0; i < num_probes; i++) { | |
98 | snprintf(name, SR_MAX_PROBENAME_LEN, "%d", i); | |
c37d2b1b | 99 | /* TODO: Check return value. */ |
bb7ef793 | 100 | sr_dev_probe_add(in->vdev, name); |
464d12c7 | 101 | } |
83e9d586 UH |
102 | |
103 | return SR_OK; | |
104 | } | |
105 | ||
106 | static int loadfile(struct sr_input *in, const char *filename) | |
107 | { | |
108 | struct sr_datafeed_header header; | |
109 | struct sr_datafeed_packet packet; | |
9c939c51 | 110 | struct sr_datafeed_logic logic; |
83e9d586 UH |
111 | uint8_t buf[PACKET_SIZE], divcount; |
112 | int i, fd, size, num_probes; | |
113 | uint64_t samplerate; | |
114 | ||
115 | /* TODO: Use glib functions! GIOChannel, g_fopen, etc. */ | |
116 | if ((fd = open(filename, O_RDONLY)) == -1) { | |
7b48d6e1 | 117 | sr_err("la8 in: %s: file open failed", __func__); |
83e9d586 UH |
118 | return SR_ERR; |
119 | } | |
120 | ||
bb7ef793 | 121 | num_probes = g_slist_length(in->vdev->probes); |
83e9d586 UH |
122 | |
123 | /* Seek to the end of the file, and read the divcount byte. */ | |
124 | divcount = 0x00; /* TODO: Don't hardcode! */ | |
125 | ||
126 | /* Convert the divcount value to a samplerate. */ | |
127 | samplerate = divcount_to_samplerate(divcount); | |
128 | if (samplerate == 0xffffffffffffffffULL) { | |
129 | close(fd); /* FIXME */ | |
130 | return SR_ERR; | |
131 | } | |
7b48d6e1 | 132 | sr_dbg("la8 in: %s: samplerate is %" PRIu64, __func__, samplerate); |
83e9d586 UH |
133 | |
134 | /* Send header packet to the session bus. */ | |
7b48d6e1 | 135 | sr_dbg("la8 in: %s: sending SR_DF_HEADER packet", __func__); |
83e9d586 | 136 | packet.type = SR_DF_HEADER; |
83e9d586 UH |
137 | packet.payload = &header; |
138 | header.feed_version = 1; | |
139 | gettimeofday(&header.starttime, NULL); | |
140 | header.num_logic_probes = num_probes; | |
83e9d586 | 141 | header.samplerate = samplerate; |
31ccebc4 | 142 | sr_session_send(in->vdev, &packet); |
83e9d586 UH |
143 | |
144 | /* TODO: Handle trigger point. */ | |
145 | ||
146 | /* Send data packets to the session bus. */ | |
7b48d6e1 | 147 | sr_dbg("la8 in: %s: sending SR_DF_LOGIC data packets", __func__); |
83e9d586 | 148 | packet.type = SR_DF_LOGIC; |
9c939c51 BV |
149 | packet.payload = &logic; |
150 | logic.unitsize = (num_probes + 7) / 8; | |
151 | logic.data = buf; | |
83e9d586 UH |
152 | |
153 | /* Send 8MB of total data to the session bus in small chunks. */ | |
154 | for (i = 0; i < NUM_PACKETS; i++) { | |
155 | /* TODO: Handle errors, handle incomplete reads. */ | |
156 | size = read(fd, buf, PACKET_SIZE); | |
2285cf9b | 157 | logic.length = size; |
31ccebc4 | 158 | sr_session_send(in->vdev, &packet); |
83e9d586 UH |
159 | } |
160 | close(fd); /* FIXME */ | |
161 | ||
162 | /* Send end packet to the session bus. */ | |
7b48d6e1 | 163 | sr_dbg("la8 in: %s: sending SR_DF_END", __func__); |
83e9d586 | 164 | packet.type = SR_DF_END; |
83e9d586 | 165 | packet.payload = NULL; |
31ccebc4 | 166 | sr_session_send(in->vdev, &packet); |
83e9d586 UH |
167 | |
168 | return SR_OK; | |
169 | } | |
170 | ||
7c1d391c | 171 | SR_PRIV struct sr_input_format input_chronovu_la8 = { |
83e9d586 UH |
172 | .id = "chronovu-la8", |
173 | .description = "ChronoVu LA8", | |
174 | .format_match = format_match, | |
175 | .init = init, | |
176 | .loadfile = loadfile, | |
177 | }; |