+++ /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 "sigrok.h"
-#include "sigrok-internal.h"
-
-#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)
-{
- if (!filename) {
- sr_err("la8input: %s: filename was NULL", __func__);
- // return SR_ERR; /* FIXME */
- return FALSE;
- }
-
- if (!g_file_test(filename, G_FILE_TEST_EXISTS)) {
- sr_err("la8input: %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("la8input: %s: input file '%s' not a regular file",
- __func__, filename);
- // return SR_ERR; /* FIXME */
- return FALSE;
- }
-
- /* TODO: Only accept files of length 8MB + 5 bytes. */
-
- /* TODO: Check for divcount != 0xff. */
-
- return TRUE;
-}
-
-static int init(struct sr_input *in)
-{
- int num_probes, i;
- char name[SR_MAX_PROBENAME_LEN + 1];
-
- if (in->param && in->param[0]) {
- num_probes = strtoul(in->param, NULL, 10);
- if (num_probes < 1) {
- sr_err("la8input: %s: strtoul failed", __func__);
- return SR_ERR;
- }
- } else {
- num_probes = DEFAULT_NUM_PROBES;
- }
-
- /* Create a virtual device. */
- in->vdevice = sr_device_new(NULL, 0);
-
- for (i = 0; i < num_probes; i++) {
- snprintf(name, SR_MAX_PROBENAME_LEN, "%d", i);
- /* TODO: Check return value. */
- sr_device_probe_add(in->vdevice, name);
- }
-
- return SR_OK;
-}
-
-static int loadfile(struct sr_input *in, const char *filename)
-{
- struct sr_datafeed_header header;
- struct sr_datafeed_packet packet;
- struct sr_datafeed_logic logic;
- 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("la8input: %s: file open failed", __func__);
- return SR_ERR;
- }
-
- num_probes = g_slist_length(in->vdevice->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("la8input: %s: samplerate is %" PRIu64, __func__, samplerate);
-
- /* Send header packet to the session bus. */
- sr_dbg("la8input: %s: sending SR_DF_HEADER packet", __func__);
- packet.type = SR_DF_HEADER;
- packet.payload = &header;
- header.feed_version = 1;
- gettimeofday(&header.starttime, NULL);
- header.num_logic_probes = num_probes;
- header.samplerate = samplerate;
- sr_session_bus(in->vdevice, &packet);
-
- /* TODO: Handle trigger point. */
-
- /* Send data packets to the session bus. */
- sr_dbg("la8input: %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 = PACKET_SIZE;
- sr_session_bus(in->vdevice, &packet);
- }
- close(fd); /* FIXME */
-
- /* Send end packet to the session bus. */
- sr_dbg("la8input: %s: sending SR_DF_END", __func__);
- packet.type = SR_DF_END;
- packet.payload = NULL;
- sr_session_bus(in->vdevice, &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