--- /dev/null
+.\"
+.\" Copyright © 2009 Keith Packard <keithp@keithp.com>
+.\"
+.\" 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.,
+.\" 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA.
+.\"
+.\"
+.TH AO-DUMPLOG 1 "ao-dump-up" ""
+.SH NAME
+ao-dump-up \- Dump flight log from MicroPeak flight computer
+.SH SYNOPSIS
+.B "ao-dump-up"
+[\-T \fItty-device\fP]
+[\--tty \fItty-device\fP]
+[\-D \fIaltos-device\fP]
+[\--device \fIaltos-device\fP]
+.SH OPTIONS
+.TP
+\-T tty-device | --tty tty-device
+This selects which tty device ao-dump-up uses to communicate with
+the target device.
+.TP
+\-D AltOS-device | --device AltOS-device
+Search for a connected device. This forces the program to look
+for a specific USB device name.
+.SH DESCRIPTION
+.I ao-dump-up
+downloads a MicroPeak flight log from a connected MicroPeak USB adapter.
+.SH USAGE
+.I ao-dump-up
+connects to the specified target device and dumps the stored flight
+log.
+.SH AUTHOR
+Keith Packard
--- /dev/null
+/*
+ * Copyright © 2009 Keith Packard <keithp@keithp.com>
+ *
+ * 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.,
+ * 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA.
+ */
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <unistd.h>
+#include <getopt.h>
+#include <string.h>
+#include "cc-usb.h"
+#include "cc.h"
+
+#define NUM_BLOCK 512
+
+static const struct option options[] = {
+ { .name = "tty", .has_arg = 1, .val = 'T' },
+ { .name = "device", .has_arg = 1, .val = 'D' },
+ { 0, 0, 0, 0},
+};
+
+static void usage(char *program)
+{
+ fprintf(stderr, "usage: %s [--tty <tty-name>] [--device <device-name>]\n", program);
+ exit(1);
+}
+
+static uint8_t
+log_checksum(int d[8])
+{
+ uint8_t sum = 0x5a;
+ int i;
+
+ for (i = 0; i < 8; i++)
+ sum += (uint8_t) d[i];
+ return -sum;
+}
+
+static int get_nonwhite(struct cc_usb *cc, int timeout)
+{
+ int c;
+
+ for (;;) {
+ c = cc_usb_getchar_timeout(cc, timeout);
+ putchar(c);
+ if (!isspace(c))
+ return c;
+ }
+}
+
+static uint8_t
+get_hexc(struct cc_usb *cc)
+{
+ int c = get_nonwhite(cc, 1000);
+
+ if ('0' <= c && c <= '9')
+ return c - '0';
+ if ('a' <= c && c <= 'f')
+ return c - 'a' + 10;
+ if ('A' <= c && c <= 'F')
+ return c - 'A' + 10;
+ fprintf(stderr, "Non-hex char '%c'\n", c);
+ exit(1);
+}
+
+static int file_crc;
+
+static const int POLY = 0x8408;
+
+static int
+log_crc(int crc, int b)
+{
+ int i;
+
+ for (i = 0; i < 8; i++) {
+ if (((crc & 0x0001) ^ (b & 0x0001)) != 0)
+ crc = (crc >> 1) ^ POLY;
+ else
+ crc = crc >> 1;
+ b >>= 1;
+ }
+ return crc & 0xffff;
+}
+
+static uint8_t
+get_hex(struct cc_usb *cc)
+{
+ int a = get_hexc(cc);
+ int b = get_hexc(cc);
+ int h = (a << 4) + b;
+
+ file_crc = log_crc(file_crc, h);
+ return h;
+}
+
+static int get_32(struct cc_usb *cc)
+{
+ int v = 0;
+ int i;
+ for (i = 0; i < 4; i++) {
+ v += get_hex(cc) << (i * 8);
+ }
+ return v;
+}
+
+static int get_16(struct cc_usb *cc)
+{
+ int v = 0;
+ int i;
+ for (i = 0; i < 2; i++) {
+ v += get_hex(cc) << (i * 8);
+ }
+ return v;
+}
+
+static int swap16(int i)
+{
+ return ((i << 8) & 0xff00) | ((i >> 8) & 0xff);
+}
+
+static int find_header(struct cc_usb *cc)
+{
+ for (;;) {
+ if (get_nonwhite(cc, 0) == 'M' && get_nonwhite(cc, 1000) == 'P')
+ return 1;
+ }
+}
+
+static const char *state_names[] = {
+ "startup",
+ "idle",
+ "pad",
+ "boost",
+ "fast",
+ "coast",
+ "drogue",
+ "main",
+ "landed",
+ "invalid"
+};
+
+
+int
+main (int argc, char **argv)
+{
+ struct cc_usb *cc;
+ char *tty = NULL;
+ char *device = NULL;
+ int c;
+ char line[8192];
+ int nsamples;
+ int i;
+ int crc;
+ int current_crc;
+
+ while ((c = getopt_long(argc, argv, "T:D:", options, NULL)) != -1) {
+ switch (c) {
+ case 'T':
+ tty = optarg;
+ break;
+ case 'D':
+ device = optarg;
+ break;
+ default:
+ usage(argv[0]);
+ break;
+ }
+ }
+ if (!tty)
+ tty = cc_usbdevs_find_by_arg(device, "FT230X Basic UART");
+ if (!tty)
+ tty = getenv("ALTOS_TTY");
+ if (!tty)
+ tty="/dev/ttyUSB0";
+ cc = cc_usb_open(tty);
+ if (!cc)
+ exit(1);
+ find_header(cc);
+ file_crc = 0xffff;
+ get_32(cc); /* ground pressure */
+ get_32(cc); /* min pressure */
+ nsamples = get_16(cc); /* nsamples */
+ for (i = 0; i < nsamples; i++)
+ get_16(cc); /* sample i */
+ current_crc = swap16(~file_crc & 0xffff);
+ crc = get_16(cc); /* crc */
+ putchar ('\n');
+ if (crc == current_crc)
+ printf("CRC valid\n");
+ else
+ printf("CRC invalid\n");
+ cc_usb_close(cc);
+ exit (0);
+}
projects / fw / altos / commitdiff