Ceibo TCP/IP development tools allows connecting peripherals to the Internet using the standard 8051 family of microcontrollers. This is very useful for alarm systems, vending machines, toys and an endless number of applications. This Ceibo software package does not need a realtime operating system (RTOS) to use all the 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 using existing designs that just do not have the Internet connectivity. The software includes Internet Protocol routines implemented in C language. These routines are available as linkable object files or as source code. Software utilities for Modem and Ethernet 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 or Ethernet controller, RS232 interface, ISP programmer, power supply, cables and a complete documentation.
TCP/IP
The 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. The software is very compact in code size and it uses only 15 K code and 1 K data memory. This software does not use special libraries and so it can be compiled with any 8051 C-Compiler. The setup requiring specific 8051 resources are supplied as documented source code, so the code to hardware configuration is easily adaptable. Examples of various setup possibilities are also supplied.
The connection to the server uses Point-to-Point Protocol (PPP), including the Transmission Control Protocol (TCP), which is required for e-mail protocols. PPP connection implements Link Control Protocol (LCP), Password Authentication Protocol (PAP) and Internet Protocol Control Protocol (IPCP). After the TCP/IP connection is established, e-mails can be sent and received using Simple Mail Transfer Protocol (SMTP) and Post Office Protocol (POP3).
Development board
The Ceibo DB-TCP/IP is a kit with all the necessary elements for direct Internet connectivity. The development board is a 10 x 10 cm populated PCB with a 89C51RD2 microcontroller, which has 64K flash memory for the firmware. It is preprogrammed with the TCP/IP protocol and many routines. The crystal is installed in a socket, so it may be changed to any desired value. Two options are available: DB-TCP/IP-M (MODEM) and DB-TCP/IP-E (ETHERNET).
Because all the functions are implemented and can be tested with this working system, it may be used as a design reference.
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