Getting Started: Running the “Device
– Composite – HID + MSD” demo
Configuration
1: PIC18F87J50 PIM + HPC Explorer
Configuration
1: PIC18F87J50 PIM + HPC Explorer
To run this project, you will need one of the
following sets of hardware:
PIC18F87J50
Plug-In-Module (PIM) (MA180021)
High
pin count (HPC) Explorer (DM183022)
SD Card
PICTail™ Plus Daughter Card (AC164122)
PIC24FJ256GB110
Plug-In-Module (PIM) (MA240014)
Explorer
16 (DM240001)
USB
PICtail Plus Daughter Card (AC164131)
SD
Card PICTail Plus Daughter Card (AC164122)
This
section describes how to set up the various configurations of hardware to run
this demo.
Configuration 1: PICDEM FS USB
Configuration 2: PIC18F87J50 PIM + HPC Explorer
Configuration 3: PIC24FJ256GB110 PIM + Explorer 16
1)
Before attaching the PIC18F87J50 PIM to the HPC Explorer board, insure that the
processor selector switch (S3) is in the “ICE” position as seen in the image
below. Failure to so will result in
difficulties in getting the PIC18F87J50 PIM to sit properly on the HPC
Explorer.
2)
Short JP4 on the PIC18F87J50 PIM. This
allows the demo board to be powered through bus power.
3)
Short JP1 such that the “R” and “U” options are shorted.
4)
Before connecting the PIC18F87J50 PIM to the HPC Explorer board, remove all
attached cables from both boards.
Connect the PIC18F87J50 PIM to the HPC Explorer board. Be careful when connecting the boards to
insure that no pins are bent or damaged during the process. Also insure that the PIM is not shifted in
any direction and that all of the headers are properly aligned.
5)
On the SD Card PICTail Plus board, short JP1, JP2, and JP3 on the side farthest
from the SD Card holder. Depending on
the revision of the board you have the silk-screen on the board may incorrectly
label the top as the “HPC-EXP” setting.
Please ignore this silk screen and place the jumpers as described above
and seen below.
6) Connect the SD Card PICTail Plus board to the
HPC Explorer board. This may require the
addition of female headers onto the HPC Explorer board and possibly male
headers on the SD Card PICTail Plus board.
Make sure when connecting the two boards together that the pin names as
printed on both boards match up as they are connected.
1)
Before attaching the PIC24FJ256GB110 PIM to the Explorer 16 board, insure that
the processor selector switch (S2) is in the “PIM” position as seen in the
image below.
2)
Short the J7 jumper to the “PIC24” setting
3)
Before connecting the PIC24FJ256GB110 PIM to the Explorer 16 board, remove all
attached cables from both boards.
Connect the PIC24FJ256GB110 PIM to the Explorer 16 board. Be careful when connecting the boards to
insure that no pins are bent or damaged during the process. Also insure that the PIM is not shifted in
any direction and that all of the headers are properly aligned.
4)
On the SD Card PICTail Plus board, short JP1, JP2, and JP3 on the side farthest
from the SD Card holder. Depending on
the revision of the board you have the silk-screen on the board may incorrectly
label the top as the “HPC-EXP” setting.
Please ignore this silk screen and place the jumpers as described above
and seen below.
5) Connect the SD Card PICTail Plus board to the
HPC Explorer board in either the female PICTail Plus connectors. Attach the board in the top bay of either of
the connectors.
6) On the USB PICTail Plus board, short jumper
JP1. Remove all other shorts on the
board.
7) Connect the USB PICTail Plus board to either
of the female PICTail Plus connectors or on the card edge connector (J9) at the
edge of the Explorer 16 board.
To
run this project, you will need to load the corresponding firmware into the
devices. There are two methods available
for loading the demos: Precompiled demos and source code projects.
Precompiled
Demos are available in the “<Install Directory>\USB – Precompiled Demos”
folders. Each demo should be prefaced
with the hardware platform it is compiled for.
Select the file that matches the hardware that you have and the demo
that you want to run. For more
information about how to load a precompiled project, please see the “Getting
Started – Loading a precompiled demo” guide.
The
source code for this demo is available in the “<Install Directory\USB Device
– Composite – HID + MSD” directory. In
this directory you will find all of the user level source and header files as
well as project and workspace files for each of the hardware platforms. Find the project (*.mcp) or workspace (*.mcw)
file that corresponds to the hardware platform you wish to test. Compile and program the demo code into the
hardware platform. For more help on how
to compile and program projects, please refer to the MPLAB® IDE help available
through the help menu of MPLAB (Help->Topics…->MPLAB IDE).
NOTE
WHEN USING THE HID BOOTLOADER (for PIC18F87J50 PIM): The “USB Device - Mass
Storage - SD Card reader”, “USB Device - Mass Storage - SD Card data logger”,
and “USB Device – Composite – HID + MSD” demos make use of the SD Card PICtail
Daughter Board (Microchip® Direct: AC164122).
This PICtail uses the RB4 I/O pin for the card detect (CD) signal, and
is actively driven by the PICtail. The
active drive overpowers the pull up resistor on the RB4 pushbutton (on the
PIC18F87J50 FS USB Plug-In Module board).
As a result, if the PIC18F87J50 is programmed with the HID bootloader,
and an SD Card is installed in the socket when the microcontroller comes out of
reset, the firmware will immediately enter the bootloader (irrespective of the
RB4 pushbutton state). To exit the
bootloader firmware, remove the SD Card from the SD Card socket, and tap the
MCLR button. When the SD Card is not
plugged in, the PICtail will drive the card detect signal (which is connected
to RB4) logic high, which will enable the bootloader to exit to the main
application after coming out of reset.
Once the main application firmware is operating, the SD Card can be
plugged in. The SD Card is
“hot-swappable” and should be recognized by the host upon insertion. To avoid this inconvenience when using the
bootloader with the PICtail, it is suggested to modify the bootloader firmware
to use some other I/O pin for bootloader entry, such as RB0 (which has a
pushbutton on it on the HPC Explorer board).
This demo uses the selected hardware platform as both and SD
card reader and a custom HID device. It
will appear to the computer as if two USB devices were attached.
For details how to run the demo for each of the functions
please see the respective getting started documents: “USB
Device – Mass Storage – SD Card Reader” and “USB
Device – HID – Simple Custom Demo”.
NOTE: the “USB Device
– HID – Simple Custom Demo” application is expecting a PID of 0x003F. Because these two different applications
can’t have the same PID, this demo uses PID 0x0054. The PC application that corresponds to this
application is only looking for devices with PID 0x003F so the PC application
will not be able connect to this demo without modification. Modify the MY_DEVICE_ID field to
"Vid_04d8&Pid_0054" and recompile
The Microchip name and logo, the Microchip logo,
MPLAB, and PIC are registered trademarks of Microchip Technology Incorporated
in the
PICDEM and PICTail are trademarks of Microchip
Technology Incorporated in the
Microsoft, Windows, and Windows Vista are either
registered trademarks or trademarks of Microsoft Corporation in the
SD is a trademark of the SD Association in the
U.S.A and other countries