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_err("la8input: %s: filename was NULL", __func__);
53 // return SR_ERR; /* FIXME */
57 if (!g_file_test(filename, G_FILE_TEST_EXISTS)) {
58 sr_err("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_err("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)
81 char name[SR_MAX_PROBENAME_LEN + 1];
83 if (in->param && in->param[0]) {
84 num_probes = strtoul(in->param, NULL, 10);
86 sr_err("la8input: %s: strtoul failed", __func__);
90 num_probes = DEFAULT_NUM_PROBES;
93 /* Create a virtual device. */
94 in->vdevice = sr_device_new(NULL, 0);
96 for (i = 0; i < num_probes; i++) {
97 snprintf(name, SR_MAX_PROBENAME_LEN, "%d", i);
98 /* TODO: Check return value. */
99 sr_device_probe_add(in->vdevice, name);
105 static int loadfile(struct sr_input *in, const char *filename)
107 struct sr_datafeed_header header;
108 struct sr_datafeed_packet packet;
109 struct sr_datafeed_logic logic;
110 uint8_t buf[PACKET_SIZE], divcount;
111 int i, fd, size, num_probes;
114 /* TODO: Use glib functions! GIOChannel, g_fopen, etc. */
115 if ((fd = open(filename, O_RDONLY)) == -1) {
116 sr_err("la8input: %s: file open failed", __func__);
120 num_probes = g_slist_length(in->vdevice->probes);
122 /* Seek to the end of the file, and read the divcount byte. */
123 divcount = 0x00; /* TODO: Don't hardcode! */
125 /* Convert the divcount value to a samplerate. */
126 samplerate = divcount_to_samplerate(divcount);
127 if (samplerate == 0xffffffffffffffffULL) {
128 close(fd); /* FIXME */
131 sr_dbg("la8input: %s: samplerate is %" PRIu64, __func__, samplerate);
133 /* Send header packet to the session bus. */
134 sr_dbg("la8input: %s: sending SR_DF_HEADER packet", __func__);
135 packet.type = SR_DF_HEADER;
136 packet.payload = &header;
137 header.feed_version = 1;
138 gettimeofday(&header.starttime, NULL);
139 header.num_logic_probes = num_probes;
140 header.samplerate = samplerate;
141 sr_session_bus(in->vdevice, &packet);
143 /* TODO: Handle trigger point. */
145 /* Send data packets to the session bus. */
146 sr_dbg("la8input: %s: sending SR_DF_LOGIC data packets", __func__);
147 packet.type = SR_DF_LOGIC;
148 packet.payload = &logic;
149 logic.unitsize = (num_probes + 7) / 8;
152 /* Send 8MB of total data to the session bus in small chunks. */
153 for (i = 0; i < NUM_PACKETS; i++) {
154 /* TODO: Handle errors, handle incomplete reads. */
155 size = read(fd, buf, PACKET_SIZE);
156 logic.length = PACKET_SIZE;
157 sr_session_bus(in->vdevice, &packet);
159 close(fd); /* FIXME */
161 /* Send end packet to the session bus. */
162 sr_dbg("la8input: %s: sending SR_DF_END", __func__);
163 packet.type = SR_DF_END;
164 packet.payload = NULL;
165 sr_session_bus(in->vdevice, &packet);
170 SR_PRIV struct sr_input_format input_chronovu_la8 = {
171 .id = "chronovu-la8",
172 .description = "ChronoVu LA8",
173 .format_match = format_match,
175 .loadfile = loadfile,