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Frequencies of interest

Weather Fax

Nominal freq	USB Freq	Station name
2618.50	2616.60	GYA Northwood
3585.00	3583.10	HLL Seoul
3622.50	3620.60	JMH Tokyo
3855.00	3853.10	DDH3 Hamburg

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# http://adamsblog.aperturelabs.com/2013/02/atmel-sam7xc-crypto-co-processor-key.html
# https://ridrix.wordpress.com/2009/09/19/mifare-desfire-communication-example/#comment-27

from binascii import hexlify, unhexlify
from Crypto.Cipher import DES3

def xor(a, b):
    x = ''
    for i in xrange(8):
        x += chr(ord(a[i]) ^ ord(b[i]))

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Proxmark3:
proxmark3> hf 14a reader
 UID : de ad ba be 11 22 33
ATQA : 03 44
 SAK : 20 [1]
TYPE : NXP MIFARE DESFire 4k | DESFire EV1 2k/4k/8k | Plus 2k/4k SL3 | JCOP 31/41
MANUFACTURER : no tag-info available
 ATS : 06 75 00 81 02 00 6e 79
       -  TL : length is 6 bytes
       -  T0 : TA1 is present, TB1 is present, TC1 is present, FSCI is 5 (FSC = 64)

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 UID : 39 66 b0 1f
ATQA : 00 04
 SAK : 20 [1]
TYPE : NXP MIFARE DESFire 4k | DESFire EV1 2k/4k/8k | Plus 2k/4k SL3 | JCOP 31/41
 ATS : 13 78 80 72 02 80 31 80 66 b1 84 0c 01 6e 01 83 00 90 00 11 d8
       -  TL : length is 19 bytes
       -  T0 : TA1 is present, TB1 is present, TC1 is present, FSCI is 8 (FSC = 256)
       - TA1 : different divisors are NOT supported, DR: [], DS: []
       - TB1 : SFGI = 2 (SFGT = 16384/fc), FWI = 7 (FWT = 524288/fc)
       - TC1 : NAD is NOT supported, CID is supported

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Getting it to work

The device is shipped with test firmware installed. To burn a proper firmware, you will need:

• Atmel USB DFU Programmer from https://sourceforge.net/projects/dfu-programmer/
• Actual firmware files, which in worst case scenario you have to build yourself
• Incorrect instructions from https://store.ryscc.com/blogs/news/upgrading-the-firmware-on-a-chameleonmini
• Correct instructions (and a .bat file) in the firmware documentation

The instructions on the blog page are incorrect because Rev G hardware uses ATxmega128A4U instead of ATxmega32A4U. Why? Probably an outdated version of hardware.

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"""
A set of simple DSP utilities with abysmal performance
"""

import math
import cmath
import struct
import util

#

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"""A simple test for presence of a WCF net.tcp handler on a port"""

import sys
import socket
import struct

def hexdump(data):
    """Pretty print a hex dump of data, similar to xxd"""
    lines = []
    offset = 0

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import socket
import time
import sys

import http
import magneto

def run_test(target, id):
    print
    print "* * * * * Starting next test"

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Air band receiver

The main reuiqrements are:

• Simultaneous reception and demodulation of multiple channels
• Coverage of the VHF aircraft band, 118.000 through 136.975 MHz (19 MHz bandwidth), channel spacing 25 kHz
• Demodulation of voice AM, ACARS, and VDL mode 2

Design

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void matrix_multiply(const data_t *M, const data_t *x, data_t *y, size_t width, size_t height)
{
    // assert(height > 0);
    // assert(width >= 4);
    // assert((width & 3) == 0);

    IACA_START;

#if 1
    if (height >= 4) {