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.
39 * @return The samplerate in Hz, or 0xffffffffffffffff upon errors.
41 static uint64_t divcount_to_samplerate(uint8_t divcount)
44 return 0xffffffffffffffffULL;
46 return SR_MHZ(100) / (divcount + 1);
49 static int format_match(const char *filename)
52 sr_warn("la8input: %s: filename was NULL", __func__);
53 // return SR_ERR; /* FIXME */
57 if (!g_file_test(filename, G_FILE_TEST_EXISTS)) {
58 sr_warn("la8input: %s: input file '%s' does not exist",
60 // return SR_ERR; /* FIXME */
64 if (!g_file_test(filename, G_FILE_TEST_IS_REGULAR)) {
65 sr_warn("la8input: %s: input file '%s' not a regular file",
67 // return SR_ERR; /* FIXME */
71 /* TODO: Only accept files of length 8MB + 5 bytes. */
73 /* TODO: Check for divcount != 0xff. */
78 static int init(struct sr_input *in)
82 if (in->param && in->param[0]) {
83 num_probes = strtoul(in->param, NULL, 10);
85 sr_warn("la8input: %s: strtoul failed", __func__);
89 num_probes = DEFAULT_NUM_PROBES;
92 /* Create a virtual device. */
93 in->vdevice = sr_device_new(NULL, 0, num_probes);
98 static int loadfile(struct sr_input *in, const char *filename)
100 struct sr_datafeed_header header;
101 struct sr_datafeed_packet packet;
102 uint8_t buf[PACKET_SIZE], divcount;
103 int i, fd, size, num_probes;
106 /* TODO: Use glib functions! GIOChannel, g_fopen, etc. */
107 if ((fd = open(filename, O_RDONLY)) == -1) {
108 sr_warn("la8input: %s: file open failed", __func__);
112 num_probes = g_slist_length(in->vdevice->probes);
114 /* Seek to the end of the file, and read the divcount byte. */
115 divcount = 0x00; /* TODO: Don't hardcode! */
117 /* Convert the divcount value to a samplerate. */
118 samplerate = divcount_to_samplerate(divcount);
119 if (samplerate == 0xffffffffffffffffULL) {
120 close(fd); /* FIXME */
123 sr_dbg("la8input: %s: samplerate is %" PRIu64, __func__, samplerate);
125 /* Send header packet to the session bus. */
126 sr_dbg("la8input: %s: sending SR_DF_HEADER packet", __func__);
127 packet.type = SR_DF_HEADER;
128 packet.length = sizeof(struct sr_datafeed_header);
130 packet.payload = &header;
131 header.feed_version = 1;
132 gettimeofday(&header.starttime, NULL);
133 header.num_logic_probes = num_probes;
134 header.num_analog_probes = 0;
135 header.protocol_id = SR_PROTO_RAW;
136 header.samplerate = samplerate;
137 sr_session_bus(in->vdevice, &packet);
139 /* TODO: Handle trigger point. */
141 /* Send data packets to the session bus. */
142 sr_dbg("la8input: %s: sending SR_DF_LOGIC data packets", __func__);
143 packet.type = SR_DF_LOGIC;
144 packet.unitsize = (num_probes + 7) / 8;
145 packet.payload = buf;
147 /* Send 8MB of total data to the session bus in small chunks. */
148 for (i = 0; i < NUM_PACKETS; i++) {
149 /* TODO: Handle errors, handle incomplete reads. */
150 size = read(fd, buf, PACKET_SIZE);
151 packet.length = PACKET_SIZE;
152 sr_session_bus(in->vdevice, &packet);
154 close(fd); /* FIXME */
156 /* Send end packet to the session bus. */
157 sr_dbg("la8input: %s: sending SR_DF_END", __func__);
158 packet.type = SR_DF_END;
161 packet.payload = NULL;
162 sr_session_bus(in->vdevice, &packet);
167 struct sr_input_format input_chronovu_la8 = {
168 .id = "chronovu-la8",
169 .description = "ChronoVu LA8",
170 .format_match = format_match,
172 .loadfile = loadfile,