+++ /dev/null
-/*
- * This file is part of the sigrok project.
- *
- * Copyright (C) 2011 Uwe Hermann <uwe@hermann-uwe.de>
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2 of the License, or
- * (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
- */
-
-#include <stdlib.h>
-#include <fcntl.h>
-#include <unistd.h>
-#include <sys/stat.h>
-#include "libsigrok.h"
-#include "libsigrok-internal.h"
-
-/* Message logging helpers with driver-specific prefix string. */
-#define DRIVER_LOG_DOMAIN "input/chronovu-la8: "
-#define sr_log(l, s, args...) sr_log(l, DRIVER_LOG_DOMAIN s, ## args)
-#define sr_spew(s, args...) sr_spew(DRIVER_LOG_DOMAIN s, ## args)
-#define sr_dbg(s, args...) sr_dbg(DRIVER_LOG_DOMAIN s, ## args)
-#define sr_info(s, args...) sr_info(DRIVER_LOG_DOMAIN s, ## args)
-#define sr_warn(s, args...) sr_warn(DRIVER_LOG_DOMAIN s, ## args)
-#define sr_err(s, args...) sr_err(DRIVER_LOG_DOMAIN s, ## args)
-
-#define NUM_PACKETS 2048
-#define PACKET_SIZE 4096
-#define DEFAULT_NUM_PROBES 8
-
-/**
- * Convert the LA8 'divcount' value to the respective samplerate (in Hz).
- *
- * LA8 hardware: sample period = (divcount + 1) * 10ns.
- * Min. value for divcount: 0x00 (10ns sample period, 100MHz samplerate).
- * Max. value for divcount: 0xfe (2550ns sample period, 392.15kHz samplerate).
- *
- * @param divcount The divcount value as needed by the hardware.
- *
- * @return The samplerate in Hz, or 0xffffffffffffffff upon errors.
- */
-static uint64_t divcount_to_samplerate(uint8_t divcount)
-{
- if (divcount == 0xff)
- return 0xffffffffffffffffULL;
-
- return SR_MHZ(100) / (divcount + 1);
-}
-
-static int format_match(const char *filename)
-{
- struct stat stat_buf;
- int ret;
-
- if (!filename) {
- sr_err("%s: filename was NULL", __func__);
- // return SR_ERR; /* FIXME */
- return FALSE;
- }
-
- if (!g_file_test(filename, G_FILE_TEST_EXISTS)) {
- sr_err("%s: input file '%s' does not exist",
- __func__, filename);
- // return SR_ERR; /* FIXME */
- return FALSE;
- }
-
- if (!g_file_test(filename, G_FILE_TEST_IS_REGULAR)) {
- sr_err("%s: input file '%s' not a regular file",
- __func__, filename);
- // return SR_ERR; /* FIXME */
- return FALSE;
- }
-
- /* Only accept files of length 8MB + 5 bytes. */
- ret = stat(filename, &stat_buf);
- if (ret != 0) {
- sr_err("%s: Error getting file size of '%s'",
- __func__, filename);
- return FALSE;
- }
- if (stat_buf.st_size != (8 * 1024 * 1024 + 5)) {
- sr_dbg("%s: File size must be exactly 8388613 bytes ("
- "it actually is %d bytes in size), so this is not a "
- "ChronoVu LA8 file.", __func__, stat_buf.st_size);
- return FALSE;
- }
-
- /* TODO: Check for divcount != 0xff. */
-
- return TRUE;
-}
-
-static int init(struct sr_input *in)
-{
- struct sr_probe *probe;
- int num_probes, i;
- char name[SR_MAX_PROBENAME_LEN + 1];
- char *param;
-
- num_probes = DEFAULT_NUM_PROBES;
-
- if (in->param) {
- param = g_hash_table_lookup(in->param, "numprobes");
- if (param) {
- num_probes = strtoul(param, NULL, 10);
- if (num_probes < 1) {
- sr_err("%s: strtoul failed", __func__);
- return SR_ERR;
- }
- }
- }
-
- /* Create a virtual device. */
- in->sdi = sr_dev_inst_new(0, SR_ST_ACTIVE, NULL, NULL, NULL);
-
- for (i = 0; i < num_probes; i++) {
- snprintf(name, SR_MAX_PROBENAME_LEN, "%d", i);
- /* TODO: Check return value. */
- if (!(probe = sr_probe_new(i, SR_PROBE_LOGIC, TRUE, name)))
- return SR_ERR;
- in->sdi->probes = g_slist_append(in->sdi->probes, probe);
- }
-
- return SR_OK;
-}
-
-static int loadfile(struct sr_input *in, const char *filename)
-{
- struct sr_datafeed_packet packet;
- struct sr_datafeed_meta meta;
- struct sr_datafeed_logic logic;
- struct sr_config *src;
- uint8_t buf[PACKET_SIZE], divcount;
- int i, fd, size, num_probes;
- uint64_t samplerate;
-
- /* TODO: Use glib functions! GIOChannel, g_fopen, etc. */
- if ((fd = open(filename, O_RDONLY)) == -1) {
- sr_err("%s: file open failed", __func__);
- return SR_ERR;
- }
-
- num_probes = g_slist_length(in->sdi->probes);
-
- /* Seek to the end of the file, and read the divcount byte. */
- divcount = 0x00; /* TODO: Don't hardcode! */
-
- /* Convert the divcount value to a samplerate. */
- samplerate = divcount_to_samplerate(divcount);
- if (samplerate == 0xffffffffffffffffULL) {
- close(fd); /* FIXME */
- return SR_ERR;
- }
- sr_dbg("%s: samplerate is %" PRIu64, __func__, samplerate);
-
- /* Send header packet to the session bus. */
- std_session_send_df_header(in->sdi, DRIVER_LOG_DOMAIN);
-
- /* Send metadata about the SR_DF_LOGIC packets to come. */
- packet.type = SR_DF_META;
- packet.payload = &meta;
- src = sr_config_make(SR_CONF_SAMPLERATE, (const void *)&samplerate);
- meta.config = g_slist_append(NULL, src);
- sr_session_send(in->sdi, &packet);
-
- /* TODO: Handle trigger point. */
-
- /* Send data packets to the session bus. */
- sr_dbg("%s: sending SR_DF_LOGIC data packets", __func__);
- packet.type = SR_DF_LOGIC;
- packet.payload = &logic;
- logic.unitsize = (num_probes + 7) / 8;
- logic.data = buf;
-
- /* Send 8MB of total data to the session bus in small chunks. */
- for (i = 0; i < NUM_PACKETS; i++) {
- /* TODO: Handle errors, handle incomplete reads. */
- size = read(fd, buf, PACKET_SIZE);
- logic.length = size;
- sr_session_send(in->sdi, &packet);
- }
- close(fd); /* FIXME */
-
- /* Send end packet to the session bus. */
- sr_dbg("%s: sending SR_DF_END", __func__);
- packet.type = SR_DF_END;
- packet.payload = NULL;
- sr_session_send(in->sdi, &packet);
-
- return SR_OK;
-}
-
-SR_PRIV struct sr_input_format input_chronovu_la8 = {
- .id = "chronovu-la8",
- .description = "ChronoVu LA8",
- .format_match = format_match,
- .init = init,
- .loadfile = loadfile,
-};
projects / libsigrok.git / blobdiff