Software and Firmware Description
The software architecture can be described through
the multi-layer mode containing two major layers—
host-based software and MFC1000-based firmware
(Figure 3).
Host-Based Software
The Host-based firmware data flow architecture is
shown in Figure 4. The firmware system control
architecture is shown in Figure 5.
Host-based software consists of the following major
components.
Fax Application
Firmware that implements the T.30, T.4, and T.6
protocols with the assistance of the MFC1000’s
hardware MH/MR/MMR compressor/decompressor.
Document Scan Application
Scans documents into page memory.
Document Print Application
Prints documents from page memory.
Document Copy Application
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Coordinates scan-to-page memory and print from
page memory operations. This is used for multiple or
collated copying, or it can transfers scanner data to
the printer if only one copy is required.
PC Print Application
Uses the 1284 driver to get print data from the PC,
then formats it for printing and passes print-ready
data to the printer driver.
PC Scan Application
MFC1000 Firmware
The MFC1000 firmware implements all free-standing
MFP operations and communicates with host-based
software to implement PC operations. The major
firmware components are grouped in four levels—
System Control, Firmware Application, Hardware
Drivers, and System Services. Each of these
components are described in the paragraphs that
follow.
System Control
The system control module provides the user and the
PC with full control of all MFP functions.
Control Program
Uses the scanner driver to acquire a bitmap image of
a page and sends the bitmap to the PC via the Host
I/O driver.
Class 1 Application
Uses the modem driver and the host I/O driver to
present a Class 1 modem interface to PC fax
applications that communicate with the MFP via a
virtual serial port.
Phone Application
Dials and answers the telephone, implements speed
dialing, one-touch dialing, and group dialing.
TAM Application
The firmware control program coordinates
simultaneous operations and inter-module
communication throughout the system.
Local Control Panel
Records and plays incoming and outgoing voice
messages.
Report Generator Application
This module implements the user interface at the
front panel of the MFP device.
SMFPI Module
Generates reports in the form of text files in page
memory. These files are converted to bitmaps as they
are printed.
Hardware Drivers
The hardware drivers are a firmware layer between
the application code and the hardware itself. This
layer of code changes when the designer ports the
MFC1000 firmware from the evaluation system to a
MFC1000 based hardware platform. The application
code does not require changes for hardware
differences. The major hardware drivers are:
Printer Mechanism Driver
Communicates with control software on the PC to
integrate control of free-standing operations with
control of the PC operations.
Firmware Application
Firmware applications run in response to user, PC,
telephone, and timer requests for user-level
operations. Each application is responsible for
implementing its functions using hardware drivers and
system services as necessary.
Controls carrier and paper feed motors for the printer,
along with inkjet nozzle firing.
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