Computers & Software
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Tuesday, May 15th, 2007Off-Road Navigation with GPS Fugawi Global Navigator 3.3.1
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On the Water
Fugawi also sells Marine ENC for marine navigation. The package provides a complete set of Navionics or NOAA charts, including depth soundings, navigational aids, hazards, restricted zones, maritime place names and landmarks. The charts are available for all major waterways throughout North America, South America, Central […]
Off-Road Navigation with GPS Fugawi Global Navigator 3.3.1(6)
Tuesday, May 15th, 2007Off-Road Navigation with GPS Fugawi Global Navigator 3.3.1
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Figure 10: An example track following along a street.
Then, once you’ve gone as far as you want, you can ask Global Navigator to run through through the route backwards and voila, you’re back at your starting point
On the Road
The Canada Data Pack which comes with the software […]
Off-Road Navigation with GPS Fugawi Global Navigator 3.3.1(5)
Tuesday, May 15th, 2007Off-Road Navigation with GPS Fugawi Global Navigator 3.3.1
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Be careful how much you zoom in, however, since the maps are raster versions and if you get in too close, they will become pixelized beyond usefulness.
Figure 8: Excessive zooming in can render the map useless, since the graphics are not ’scaled’ but simply bitmap pictures of the […]
Off-Road Navigation with GPS Fugawi Global Navigator 3.3.1(4)
Monday, May 14th, 2007Off-Road Navigation with GPS Fugawi Global Navigator 3.3.1
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Fugawi on the PPC
Once you have some maps downloaded to your PPC, you’re ready to roll. As mentioned earlier, functionality on the PPC is limited to a subset of the PC-based version.
Figure 5: Main screen of Global Navigator with a local topographic map loaded.
As you can see […]
Off-Road Navigation with GPS Fugawi Global Navigator 3.3.1(3)
Monday, May 14th, 2007Off-Road Navigation with GPS Fugawi Global Navigator 3.3.1
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Installing Maps
Unfortunately, installing maps to the PPC is a little cumbersome, since, again, they must be installed from the PC-based program. Northstar, the vendor/manufacturer in Canada, provides complete coverage of Canada using NRC maps at 1:250,000 (for an entire province) and 1:50,000 for specific sections. 1:50,000 is OK […]
USB - Signaling
Sunday, April 29th, 2007USB Signaling:
Pin numbers (looking as a socket):
Pin assignments
Pin
Function
1
Vbus (4.75 - 5.25 V)
2
[…]
USB - Packet Format
Sunday, April 29th, 2007USB packets have a format very similar to the packets used on the very early internet. It is nearly impossible to clearly understand USB connectivity without understanding the structure of the USB packet.
USB Packet Format:
OFFSET
TYPE
SIZE
[…]
USB - Transfer Speeds
Saturday, April 28th, 2007USB supports three data rates.
A Low Speed rate of 1.5 Mbit/s (183 KiB/s) that is mostly used for Human Interface Devices (HID) such as keyboards, mice, and joysticks.
A Full Speed rate of 12 Mbit/s (1.5 MiB/s). Full Speed was the fastest rate before the USB 2.0 specification and many devices fall back to Full Speed. […]
USB - Error Handling
Saturday, April 28th, 2007Considerable error checking and error handling features have been built in to the USB to ensure that it is a reliable method of connecting peripherals to a PC. Data integrity should be comparable to that of an internal expansion bus.
Immunity from data corruption by noise and spikes has been provided by the use of differential […]
USB - Bus Protocol
Friday, April 27th, 2007Information transfers over the bus are called transactions. At any time the host controller may have a list of transactions that are waiting to be actioned. A transaction begins when the controller sends a packet describing the type and direction of the transaction, the 7-bit USB device address and the endpoint number. This packet is […]
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