Design Automation


Embedded Internet TCP/IP for the 8051

25 April 2001 Design Automation

Ceibo is offering TCP/IP development tools that allow Internet connection for peripherals with standard 8051 microcontroller families. This suits a variety of applications such as alarm systems, vending machines, toys etc.

This software package does not require a realtime operating system to use all its protocol capabilities. Any software environment is acceptable. The system consists of a working package which includes both software and hardware used to develop Internet applications with the minimum effort, as well as developing existing designs that do not have Internet connectivity, says Ceibo.

The software includes Internet Protocol routines implemented in C language. These are available as linkable object files or as source code. Software utilities for modem operations as well as definition of timers, interrupts, RAM locations and many others are supplied as source code. In addition to this software, Ceibo offers a development board that contains the 80C51 basic circuits, a modem, RS232 interface, ISP programmer, power supply, cables and complete documentation.

TCP/IP protocol is used to send and receive e-mails or files. The protocol employs the 8051 internal UART and one timer for baud rate generator. It dials, sends and receives e-mails. Ceibo says that the software is very compact in code size and it uses only 15K code and 1K data memory. This software does not use special libraries and so it can be compiled with any 8051 C-compiler.

The Ceibo DB-TCP/IP is a kit with all the necessary elements for direct Internet connectivity. Because all the functions are implemented and can be tested with this working system, it may be used as a design reference. The development board is a 100 x 100 mm populated PCB with supplied 89C51RD2 microcontroller which has 64K flash memory for the firmware. A 32K SRAM is also connected to the microcontroller for applications which require more memory than that provided on-chip.



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