Project:Nanode/Applications: Difference between revisions
From London Hackspace Wiki
→Tuxgraphics I/O Web Server
No edit summary |
|||
| Line 635: | Line 635: | ||
===Tuxgraphics I/O Web Server=== | ===Tuxgraphics I/O Web Server=== | ||
Tuxgraphics were the first company to produce a board based on the combination of the ATmega and the ENC28J60. In fact most of the library was written originally by Guido Socher and Pascal Stang. | Tuxgraphics were the first company to produce a board based on the combination of the ATmega and the ENC28J60. In fact, most of the library was written originally by Guido Socher and Pascal Stang working for Tuxgraphics. | ||
The | Whilst the original library has been updated and modified by others, much of the basic ENC28J60 low level driver code has remained and is common across any device using the ENC28J60. | ||
The Tuxgraphics web server is not a normal web server. It is an IO-web server. It reads sensor values or IO-pins and it controls digital output lines or relays. It is as well possible to have analog output lines providing arbitary voltages between 0V and 3.3V by using a R2R-ladder DAC. | |||
Sometimes you want to have more digital output pins than the microcontroller you are using provides. You can either switch to a bigger microcontroller chip or use a 74hc595 port expander. This article focuses on the 74hc595. Using multiple 74hc595 chips you could in theory have an infinite amount of output lines on a single ethernet board. | Sometimes you want to have more digital output pins than the microcontroller you are using provides. You can either switch to a bigger microcontroller chip or use a 74hc595 port expander. This article focuses on the 74hc595. Using multiple 74hc595 chips you could in theory have an infinite amount of output lines on a single ethernet board. | ||
