2 * This file is part of the sigrok project.
4 * Copyright (C) 2011 Uwe Hermann <uwe@hermann-uwe.de>
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.
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.
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
25 #include "sigrok-internal.h"
27 #define NUM_PACKETS 2048
28 #define PACKET_SIZE 4096
29 #define DEFAULT_NUM_PROBES 8
32 * Convert the LA8 'divcount' value to the respective samplerate (in Hz).
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).
38 * @param divcount The divcount value as needed by the hardware.
40 * @return The samplerate in Hz, or 0xffffffffffffffff upon errors.
42 static uint64_t divcount_to_samplerate(uint8_t divcount)
45 return 0xffffffffffffffffULL;
47 return SR_MHZ(100) / (divcount + 1);
50 static int format_match(const char *filename)
53 sr_err("la8 in: %s: filename was NULL", __func__);
54 // return SR_ERR; /* FIXME */
58 if (!g_file_test(filename, G_FILE_TEST_EXISTS)) {
59 sr_err("la8 in: %s: input file '%s' does not exist",
61 // return SR_ERR; /* FIXME */
65 if (!g_file_test(filename, G_FILE_TEST_IS_REGULAR)) {
66 sr_err("la8 in: %s: input file '%s' not a regular file",
68 // return SR_ERR; /* FIXME */
72 /* TODO: Only accept files of length 8MB + 5 bytes. */
74 /* TODO: Check for divcount != 0xff. */
79 static int init(struct sr_input *in)
82 char name[SR_MAX_PROBENAME_LEN + 1];
84 if (in->param && in->param[0]) {
85 num_probes = strtoul(in->param, NULL, 10);
87 sr_err("la8 in: %s: strtoul failed", __func__);
91 num_probes = DEFAULT_NUM_PROBES;
94 /* Create a virtual device. */
95 in->vdevice = sr_dev_new(NULL, 0);
97 for (i = 0; i < num_probes; i++) {
98 snprintf(name, SR_MAX_PROBENAME_LEN, "%d", i);
99 /* TODO: Check return value. */
100 sr_dev_probe_add(in->vdevice, name);
106 static int loadfile(struct sr_input *in, const char *filename)
108 struct sr_datafeed_header header;
109 struct sr_datafeed_packet packet;
110 struct sr_datafeed_logic logic;
111 uint8_t buf[PACKET_SIZE], divcount;
112 int i, fd, size, num_probes;
115 /* TODO: Use glib functions! GIOChannel, g_fopen, etc. */
116 if ((fd = open(filename, O_RDONLY)) == -1) {
117 sr_err("la8 in: %s: file open failed", __func__);
121 num_probes = g_slist_length(in->vdevice->probes);
123 /* Seek to the end of the file, and read the divcount byte. */
124 divcount = 0x00; /* TODO: Don't hardcode! */
126 /* Convert the divcount value to a samplerate. */
127 samplerate = divcount_to_samplerate(divcount);
128 if (samplerate == 0xffffffffffffffffULL) {
129 close(fd); /* FIXME */
132 sr_dbg("la8 in: %s: samplerate is %" PRIu64, __func__, samplerate);
134 /* Send header packet to the session bus. */
135 sr_dbg("la8 in: %s: sending SR_DF_HEADER packet", __func__);
136 packet.type = SR_DF_HEADER;
137 packet.payload = &header;
138 header.feed_version = 1;
139 gettimeofday(&header.starttime, NULL);
140 header.num_logic_probes = num_probes;
141 header.samplerate = samplerate;
142 sr_session_bus(in->vdevice, &packet);
144 /* TODO: Handle trigger point. */
146 /* Send data packets to the session bus. */
147 sr_dbg("la8 in: %s: sending SR_DF_LOGIC data packets", __func__);
148 packet.type = SR_DF_LOGIC;
149 packet.payload = &logic;
150 logic.unitsize = (num_probes + 7) / 8;
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);
157 logic.length = PACKET_SIZE;
158 sr_session_bus(in->vdevice, &packet);
160 close(fd); /* FIXME */
162 /* Send end packet to the session bus. */
163 sr_dbg("la8 in: %s: sending SR_DF_END", __func__);
164 packet.type = SR_DF_END;
165 packet.payload = NULL;
166 sr_session_bus(in->vdevice, &packet);
171 SR_PRIV struct sr_input_format input_chronovu_la8 = {
172 .id = "chronovu-la8",
173 .description = "ChronoVu LA8",
174 .format_match = format_match,
176 .loadfile = loadfile,