4d Systems 7.0” LCD CAPE for beaglebone black 4DCAPE-70T 4DCAPE-70T データシート
製品コード
4DCAPE-70T
4D SYSTEMS 4D 7.0” LCD CAPE – BEAGLE BONE BLACK
© 2014 4D SYSTEMS Page 5 of 11 www.4dsystems.com.au
Changing the brightness (Android)
Changing the brightness on Android is simple.
Navigate to the Settings menu, and to the Display
option, and then to Brightness. Slide the slider to
the desired position.
Calibrating resistive touch (Angstrom)
When a distribution is used for the first time with a
4DCAPE-70T, the default calibration application
that comes with the Angstrom distribution is
started automatically (Refer to section 3.2) on
startup of Angstrom. If the calibration is however
input incorrectly and it is required to be set again, a
file must be deleted manually in order to then
recalibrate the display.
Note, this may change as newer distributions of
Angstrom become available, or if different
distributions are used, so these instructions may
become obsolete or inaccurate.
One method is to SSH into the BBB using your PC,
navigate to the following folder and delete the
specified file. Another is to connect a USB Mouse to
navigate around using the 4DCAPE-70T, and delete
the file that way.
/etc/pointercal.xinput
One this file has been deleted, the calibration utility
can be run again.
Android Information
The 4DCAPE-70T is compatible with Android 4.2.2
and has been tested with an image from TI (see
section 3.2).
It has been noticed however that the EEPROM
Jumpers both need to be connected/closed
otherwise the CAPE may not be detected by the
Android OS.
Secondary Headers
The 4DCAPE-70T features secondary headers (P2_A
and P2_B) for another cape to be attached. Please
refer to the schematic at the end of this datasheet
in Section 7 to see which pins/IO from the BBB
feature on the secondary headers.
It is up to the user to determine which capes are
compatible based on which I/O is available.
4. EEPROM Details
On the 4D 7.0” LCD CAPE there is an EEPROM which
is used to configure the Beagle Bone Black with the
appropriate configuration in order to use the Cape.
Please note: some EEPROM content refers to the
LCD7 00A3 which is made by CircuitCo. This is the
case due to how the BBB identifies the CAPE and
what drivers to apply to it. Since the 4DCAPE-70T
utilises the LCD7 drivers, this must be the case.
4DCAPE-70T EEPROM
EEPROM Support: YES
Board Name: 4D 7.0 LCD CAPE - 4DCAPE-70T
Manufacturer: 4D Systems
Note (*): The Beaglebone, Beaglebone Black and
Beagleboard
remains
the
property
of
beaglebone.org. All references to the words
Beaglebone, Beaglebone Black, Beagleboard are
licensed under a Creative Commons Attribution-
Share Alike 3.0 license.
All references to CircuitCo and LCD7 remain the
property of CircuitCo and beagleboardtoys.org and
are not affiliated to 4D Systems in any way.
Beaglebone, Beaglebone Black, Beagleboard are
licensed under a Creative Commons Attribution-
Share Alike 3.0 license.
All references to CircuitCo and LCD7 remain the
property of CircuitCo and beagleboardtoys.org and
are not affiliated to 4D Systems in any way.