LongBoard and LongBoard II
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This task had originally been done by simple counting logic, a set of registers, and a numeric display. We replaced this with a sophisticated microcontroller on a GSM network. The new system benefits from the following functions and features: |
- ATMega8 - 8K FLASH controller, 32K Serial EEPROM for non-volatile data caching.
- RS232 Serial interface to a GM29 GSM cellphone modem provides bidirectional data transfer with a central server.
- Multiplexed infrared sensor inputs are configurable for up to eight bi-directional sensor pairs or up to sixteen unidirectional sensors.
- In-system firmware reprogrammability.
- Firmware is written in "C" for ease of maintainence.
- Innovative algorithms distribute the non-volatile storage load evenly throughout the serial EEPROM, maximizing the life of the device.
- Fail-safe data delivery is guaranteed.
LongBoard I has now been replaced with a second generation having vastly increased capabilities. LongBoard II adds the following substantially improved specifications:
- ATMega128 - 128K FLASH controller, 1.1Mb Serial EEPROM for non-volatile data caching, 3.3V low-power consumption.
- Dual RS232 Serial interface adds an auxilliary / diagnostic / maintenance port.
- ATMEL CPLD "glue" logic multiplexes serial ports and manages an onboard diagnostic display.
- Expanded I/O capability includes analog inputs and direct logic input and output.
- Full boot-loader capability for both microcontroller and glue logic enables remote firmware loading via the GSM network.
- New PWM audio capability provides for signaling, alarm tone, and even musical or speech outputs.
- Real-time clock hardware sustains time and date for up to one month, powered by a "SuperCap".
The new LongBoard II is now in production and being installed in new venues worldwide.
