Black Cat Systems


Follow our tweets!

Home
Lost Reg Code?
News
Online KiwiSDRs
macOS Software
Windows Software
Ham Radio iPhone/iPad
Linux Software
Support/FAQ
Update Policy

USB Icom CI-V Interface

Radio Hobbyist Products

  22m Programmable Beacon Kit
  22m Part 15 Beacon Kit
  CW Keyer For Beacons Kit
  Jellyfish Transformer
  Cyclops Antenna Transformer

General Interest Programs

  Atomic Mac/PC
  Audiocorder
  Audio Toolbox
  Black Cat Timer
  Diet Sleuth
  iUnit
  Graffikon
  Graph Paper Maker
  Health Tracker
  Image Resizer
  Knitting Wizard
  Label Wizard
  Prog Audio Gen
  Sound Byte
  Synth 76477

Amateur Radio Programs
  AirSpyHF+ Server
  Audiocorder
  Black Cat Absolute ACARS
  Black Cat ACARS
  Black Cat ALE
  Black Cat ALE Vacuum Cleaner
  Black Cat NetFinder
  Black Cat GMDSS
  Black Cat HF Fax
  Black Cat SSTV
  Black Cat NAVTEX SITOR-B
  Carrier Sleuth
  Cocoa 1090
  Cocoa RTL Server
  DGPS Decoding
  DX Toolbox
  Elmer
  eQSL Factory
  MatchMaker
  KiwiKonnect
  KiwiSDR Monitor
  KiwiSDR Sound Client
  MININEC Pro
  Morse Mania
  MultiMode
  sdrRewind
  RF Toolbox
  SDRuno Plugin
  SDRuno Equalizer Plugin
  SelCall
  Sonde

iPhone/iPad Apps
  ALE
  Atoms To Go
  dB Calc
  Clik Trak
  DGPS Decoder
  Drill Calc
  DX Toolbox
  Elmer Extra
  Elmer General
  Elmer Tech
  Feld Hellschreiber
  Field Strength Calc
  Function Generator Pad
  GMDSS
  Godafoss
  HF Weather Fax
  iAttenuate
  iFunctionGenerator
  iSoundex
  iSoundByte
  iSweep
  iUnit
  Morse Mania
  ACARS Pad
  Morse Pad
  NAVTEX Pad
  Packet Pad
  PSK31 Pad
  SSTV Pad
  Photon Calc
  Rad Map Tracker
  RF Link Calc
  SelCall Tone Gen
  Sound Byte
  Sound Byte Control
  Spectrum Pad
  SWBC Schedules
  Synth 76477
  Synth Motion
  Transmission Line Calc
  Weather Calc
  Wire Calc

iPhone/iPad Bundles
  RF Calculator Apps
  Ham Radio Decoder Apps
  Audio Utility Apps
  Shortwave Weather Apps
  Ham Radio Exam Study Apps
  Shortwave Decoder Apps

Android Apps
  ACARS
  Audio Function Generator
  
Audio Spectrum Analyzer
  
DGPS Decoder
  HF Weather Fax
  NAVTEX
  Rad Map Tracker
  SelCall Tone Gen
  Sound Byte Control
  SWBC Schedules
  Wire Calc

About Black Cat Systems
Site Map
Our software for Mac OSX
Privacy Policy
Press/Media
HFunderground
Apple /// Emulator

Macintosh Links
Shortwave Radio
Pirate Radio
Spy Numbers Stations
Science and Electronics
Ham Radio Software


   

MIL-STD-188
USB Synchronous to Asynchronous Interface


USB Sync Interface

The USB Synchronous to Asynchronous Interface accepts synchronous RS-232 level clock and data signals on a DB-25 connector, such as those defined in MIL-188C or MIL-114, and sends the data bits through the USB bus. Data bits are packaged eight per byte, with the LSB representing the first bit, and the MSB the last. Clock rates up to 9,600 baud are supported, and may be any value as the data is captured on edge of the clock signal. The unit is for reception of data from a modem, not transmitting.

The following pinout on the DB-25 connector is used:

Pin		Function
4		Data
7		Ground
20		Clock

A "data slicer" mode is also available, where the data line is sampled at a fixed rate, and the bits are packaged as above and sent over the USB link.

The unit is configured by sending bytes to it over the USB link. The high nibble of a byte represents the command, the low nibble is the data. The following commands are supported:

CMD		Function
0		Reset bit counter to zero
1		Sets the edge from the LSB of the data, 1 means falling, 0 means rising
2		Sets the polarity from the LSB of the data, 0 means inverted, 1 means normal
3		Sets slicer mode if LSB is 1, turns slicer mode off if LSB is 0
4		Sets low nibble of slicer divisor (16 bits total)
5		Sets second nibble of slicer divisor
6		Sets third nibble of slicer divisor
7		Sets high nibble of slicer divisor and latches new rate
8		Sets slicer rate prescaler: 0=1, 1=2, 2=4, 3=8
9		Reserved
A		Reserved
B		Reserved
C		Reserved
D		Reserved
E		Reserved
F		Reserved

The slicer rate is computed by dividing 2,000,000 by the prescaler (1, 2, 4, or 8) and by the divisor (1 to 65535). For example, With a prescaler of 8 and a divisor of 125, the slicer rate is 2000 Hz.

The USB driver makes the unit emulate a normal serial port, so that the usual operating system functions work as usual, as per the operating system.

Communications over the emulated (USB) serial port should be 38,400 baud, 8 data bits, 1 stop bit, no parity.

The DTR line over the USB link should be asserted for normal operation, it can be momentarily de-asserted to reset the microcontroller in the unit. The RTS line is ignored.

Please contact us regarding availability of this product.

Looking for a way to connect your computer to your Icom rig? Take a look at the Black Cat Systems USB Icom CI-V Interface


Application Notes for interfacing to specific equipment:

HALComm ST-8000 HF modem

Rockwell MDM-2001 HF modem Download Area:

USB Drivers (note the FTDI driver is built into Linux kernel 2.4.20 or greater):

Windows 2000/XP FTDI USB Driver

Windows 98/ME FTDI USB Driver

Mac OS X FTDI USB Driver Version 2.1.0

Intel Mac OS X FTDI USB Driver - Requires 10.4 (Tiger) Version 2.2.0

Mac OS 8/9 FTDI USB Driver

These test programs let you send commands to the interface, as well as view data coming back. They are purely meant for diagnostics purposes, to verify the unit is functional and receiving data and clock signals.

Windows Sync program - Talks to the unit over the USB bus for basic testing purposes.

Mac OS X Sync program - Talks to the unit over the USB bus for basic testing purposes.

Mac OS Sync program - Talks to the unit over the USB bus for basic testing purposes.

Linux Sync program - Talks to the unit over the USB bus for basic testing purposes.

The following program lets you use a PC running under DOS (not a DOS window in Windows but really in DOS) to send synchronous data to the unit for testing purposes. A com port at 0x3bc is assumed.

SYNCTEST program - Runs on a PC in DOS mode to test the unit via the RTS and DTR handshake lines.

Email your comments and questions to info@blackcatsystems.com

Last modified February 8, 2008