EXOS 2.1 Serial/Network Driver Specification

1. Introduction

The serial interface and network are provided as two separate EXOS device drivers as far as the user is concerned, with device names "SERIAL:" and "NET:" respectively. However since they share the same hardware only one of the devices can be supported at a time. So if the user wishes to open a channel to the serial device he must first close any channels open to the network, and vice versa.

Only one serial channel may exist at a time, while any number of channels may be opened to the network device provided there is sufficient RAM for the 512 bytes of buffer for each channel. All channels opened to the network or the serial device support both input and output.

Next Chapter: Hardware.

David Bouman. (dsbouma@cs.vu.nl)