Dash Express

The Dash Express (HXD8) is a networked collaborative automotive GPS unit from http://dash.net/ which was developped by Openmoko.

The FCC ID is: EUNHXD8V2. It does have a debug port that is compatible with the Openmoko Debug Board v3. It is fairly hard to get to (for a FR). It sits underneath the screen.

It has 3GB of internal flash. The DFU map is below:

Found DFU: [0x1cd8:0x511a] devnum=13, cfg=0, intf=0, alt=1, name="u-boot"
Found DFU: [0x1cd8:0x511a] devnum=13, cfg=0, intf=0, alt=2, name="u-boot_env"
Found DFU: [0x1cd8:0x511a] devnum=13, cfg=0, intf=0, alt=3, name="config"
Found DFU: [0x1cd8:0x511a] devnum=13, cfg=0, intf=0, alt=4, name="factory"
Found DFU: [0x1cd8:0x511a] devnum=13, cfg=0, intf=0, alt=5, name="splash"
Found DFU: [0x1cd8:0x511a] devnum=13, cfg=0, intf=0, alt=6, name="kernel"
Found DFU: [0x1cd8:0x511a] devnum=13, cfg=0, intf=0, alt=7, name="alt_kernel"
Found DFU: [0x1cd8:0x511a] devnum=13, cfg=0, intf=0, alt=8, name="rootfs"
Found DFU: [0x1cd8:0x511a] devnum=13, cfg=0, intf=0, alt=9, name="alt_rootfs"
Found DFU: [0x1cd8:0x511a] devnum=13, cfg=0, intf=0, alt=10, name="dash_app"
Found Runtime: [0x0a5c:0x2110] devnum=5, cfg=0, intf=3, alt=0, name="UNDEFINED"

The serial interface is available only for u-boot. You can put it into DFU mode, and change the authorized_keys file to log into the unit.

Hardware

From the information found in the hardware documentation and kernel patches parts of the subversion repositories, the following specifications can be predicted. The HXD8v2 has shipped under the FCC ID EUNHXD8V2

Processor

According to https://svn.openmoko.org/trunk/src/target/kernel/patches/s3c2440-nand-disable-hwecc.patch the HXD8 will feature an S3C2440, capable of running up to 400MHz. The features are the same as the S3C2410 plus a camera interface.

• GPIO Assignments: https://svn.openmoko.org/trunk/doc/hardware/HXD8v011/gpio.txt

Flash

According to a currently available hardware patch, the device supports 1 NAND Flash device of up to 4G. (uncertain about what kind of G that is. Could be 4Gb (which makes about 0,5GB), could be 4GB).

The DE has 3G of Flash, and there is no NOR.

Some other patch implies that there is the possibility of connecting 3 NAND Flash chips.

RAM

128MB Random Access Memory, of which 2MB is used as a Framebuffer. https://svn.openmoko.org/trunk/src/target/u-boot/patches/uboot-hxd8.patch

GSM/GPRS

Using same GSM modem on GTA01 and GTA02, TI Calypso with 850/1800/1900 configuration.

SD-Card

The HXD8 features either an SD, miniSD or microSD-card slot.

• Connected to: S3C2410 MMC/SD controller
• Driver: https://svn.openmoko.org/trunk/src/target/kernel/patches/s3c_mci.patch

LCD Module (LCM)

The HXD8 features a 480x272 pixel LCD (which is a widescreen (16:9) ratio) with PWM-controlled backlight.

Light Sensor

The HXD8 features a light sensor by TAOS Inc. (Texas Advanced Optoelectronic Solutions). It's either a TLS2560 or a TLS2561. This light sensor will be included to measure ambient illuminance to control the LCM backlight illumination, or for exposure control for the camera (depends on location of the chip).

• Datasheet: tsl2560-e53.pdf

Power Management

A Philips PCF50606 is used for power management.

• Data Sheet: PCF50606/605
• User Manual: pcf50606.pdf
• Connected to: S3C2440 via I2C.

WiFi

HXD8 features an SPI-connected Marvell 8686 based WiFi module.

GPS

The PMU chip's config contains a voltage group called GPS_3V3, and the gpio.txt a set of GPS UART data pins. HXD8 using SirfSTAR III based module solution