Henry Engineering DigiStor MP - Manual (Page 5)

7.0 CONTROL VIA RS-232: DigiStor-MP can be controlled via RS-232. Using this protocol permits direct access
to all 99 messages. Messages can be played, recorded, and downloaded from a PC into DigiStor-MP.
RS-232 connection is made via the three-terminal euroblock connector. This 1K-X-Modem communication port
operates at 9600 baud with 8 data bits, 1 stop bit and no parity. The port is designed for communication with a
local user or controller over a short reliable interface. No error detection scheme is implemented over this interface.
All command characters and returned information are in ASCII format. When connected properly, the system
prompt MFI> will be returned. The most common interface to a PC is via a COM port, usually a 9-pin D connector.
Interface details are as follows:
Function
DigiStor-MP PC Com Port
Receive Pin 1 Pin 3
Transmit Pin 2 Pin 2
Ground Pin 3 Pin 5
7.1 COMMANDS: At the MFI> prompt, various commands may be issued to control record, playback and other
functions of the DigiStor-MP. Commands are 3-letter codes, some followed by a numeric argument (xx) to
specify a Message #, number of plays, etc. When entering commands, keep these rules in mind:
1. Use all CAPS for alpha characters
2. Insert a comma between multiple arguments (if applicable)
3. Do NOT insert spaces in the command string.
4. Do NOT insert “leading zeros” in numerical arguments, eg, use PLY6, not PLY06.
5. Follow each command with ENTER (equivalent to Control, then Line Feed) to execute the command.
The most common commands are summarized below:
Function
Command String Example Notes
DOWNLOAD
DLDxx 1-99 DLD6 Downloads Msg #6 from a PC
PLAY PLYxx 1-99 PLY6 Plays Msg #6 one time
REPEAT PLAY PLYxx,xx 1-99, 1-15 PLY6,15 Plays Msg #6 15 times
RECORD RECxx 1-99 REC6 Records Msg #6
STOP STP (none) STP Stops playback
A detailed list of all commands follows below.
7.1.1 BASS LEVEL – BAS: Sets bass level of audio playback.
Syntax: BASxx, where xx is -12 thru +12. Default value is 0.
Example: BAS+6 sets bass level to “plus 6”.
7.1.2 BAD BLOCKS TEST – BBT: FLASH memories have the slight possibility of developing errors. When this
occurs, the user may hear a slight click in the audio where the error occurred. Generally this will not
happen for at least 250,000 write / erase cycles. If this happens, the bad blocks can be mapped out by
using this command. The bad blocks will be stored and not used by the recording process.
Example: BBT
This command requires about 20 minutes to complete and the system cannot perform any other function
while the bad block test is operating. The user test is completed when the MFI> prompt is given to the
user. All audio memory will be erased by performing this function.
7.1.3 RESTORE DEFAULT CONFIGURATION SETTINGS – CFG: Restores all default settings.
Example: CFG
7.1.4 DIRECTORY – DIR: The configuration of each memory location will be displayed to the user when this
command is issued. The display will show each of the eight available message locations with either a
number in the location, “XX” in the location or a “DD” in the location.
Example: DIR