Installation and Operation
©
2006 Microchip Technology Inc.
DS51571B-page 17
FIGURE 2-4:
SYSTEM BLOCK DIAGRAM
2.4.1
The PICDEM™ Demo Board Firmware Overview
Two firmware programs are supplied with this board.
00063 - HPC.asm
is for the
PICDEM™ HPC Explorer Demo Board, while
00063 - FS USB.asm
is for the
PICDEM™ FS USB Demo Board.
The PICDEM™ HPC Explorer Demo Board supports two modes of operation:
the Direct-to-PC and Echo modes.
In Direct-to-PC mode, the data byte communicates between the MCP2120 and the
PICDEM™ HPC Explorer Demo Board’s DB-9 connector (does not communicate with
the PIC18F8722). The PIC18F8722 is only used for the 16XCLK signal (for the
specified baud rate).
In Echo mode, the data byte that is received is “echoed” in the opposite case
(lowercase
→
uppercase and uppercase
→
lowercase).
The PICDEM™ FS USB Demo Board only supports Echo mode.
The source code for these programs are available for download from the Microchip web
site (www.microchip.com), as well as being available on the CD-ROM supplied with the
MCP212X Developer’s Daughter Board.
To use these programs, it is required that the MPLAB
®
IDE be installed on a computer
and that one of Microchip’s development tools are available to program the board (such
as MPLAB
®
ICD 2).
HyperTerminal
®
Program Window A
(Com 1)
(Com 2)
(1)
Com 1
Com 2
(1)
System #1
System #2
PICDEM™ HPC
Explorer Demo Board plus
MCP212X Daughter Boards
PICDEM™ HPC
Explorer Demo Board plus
MCP212X Daughter Boards
Note 1:
Only required if data is
communicated with the PC.
Some program modes “respond” to
received data (data not sent to PC).
HyperTerminal
Program Window B
