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RL-ARM User's Guide (MDK v4)

RL-RTX RL-FlashFS RL-TCPnet TCP Socket Opening TCP Connection TCP Active Open TCP Passive Open Sending TCP Data Example for Sending Data Multiple TCP Connections UDP Socket Opening UDP Connection Sending UDP Data When DHCP Enabled When ARP Cache Empty Example for Sending Data IP Multicasting Multiple UDP Connections Configuring RL-TCPnet Static Configuration System Definitions Ethernet Network Interface PPP Network Interface SLIP Network Interface UDP Socket TCP Socket BSD Socket HTTP Server Telnet Server TFTP Server TFTP Client FTP Server FTP Client DNS Client SMTP Client SNMP Agent SNTP Client Error Function Runtime Configuration Library Files Using RL-TCPnet Stand Alone With RTX Kernel Event Driven Operation IP Address Assignment Ethernet Interface PPP Interface SLIP Interface Localhost Applications HTTP Server Script Language CGI Functions Ajax Support Using XML XML Example How it works SOAP Support SOAP Interface Large POST Messages Web Pages Default Page Error Pages Web on SD Card Web Update File System Interface Http Caching How it works Internal Web External Web Multi-user Authentication Using RAM File System FCARM File Converter PRINT Directive NOPRINT Directive PAGEWIDTH Directive PAGELENGTH Directive ROOT Directive Telnet Server Command Line Interface Multi-user Authentication Sending Reply Message Short Reply Long Reply Continuous Screen Update TFTP Server File System Interface TFTP Client File System Interface FTP Server File System Interface Multi-user Authentication Supported Commands FTP Client File System Interface SMTP Client SNMP Agent MIB Database MIB Interface MIB Entry MIB Table DNS Resolver Starting DNS Device Drivers Ethernet Driver Interrupt Mode Modem Driver Serial Driver Using Serial Link Cable Connection Modem Connection Windows Dial-up Add Direct Serial Link New Dial-up Connection Configure PPP Dial-up Configure SLIP Dial-up Debugging Enabling Debug Debug Level Redirecting Output Function Overview BSD Routines CGI Routines Ethernet Routines FTP Routines HTTP Routines IGMP Routines Miscellaneous Routines Modem Routines PPP Routines Serial Routines SLIP Routines SMTP Routines SNMP Routines System Functions TCP Routines Telnet Routines TFTP Routines UDP Routines RL-CAN RL-USB Example Programs Library Reference Appendix

Web on SD Card

You can place the content of web pages also on SD Card, which is attached to the embedded system. This configuration is useful if you want to update or change the web content remotely. In this case, the RL-FlashFS system is used, which must be configured for a target device Memory Card Drive.

You can use any of the update methods to change the content of Embedded web pages:

  • HTTP File Upload
    The Web files are uploaded using a web browser. HTTP Server must be configured for the file upload. (See HTTP_Upload example for details).
  • FTP Server
    The Web files are uploaded and managed with the FTP Client, such as Windows Explorer. This might be easy, but the FTP Server must be correctly configured.
  • TFTP Server
    The TFTP Server allows only a limited functionality of the file manipulation. Again, the TFTP Server must be enabled for the embedded system and correctly configured.


  • To enable the SD-Card File System, you must copy the HTTP_uif.c user interface module to your project directory and add it to your project. This interface module is in the \Keil\ARM\RL\TCPnet\User folder. It is preconfigured for the RL-FlashFS system, so no modifications to this file are required.
  • The RL-FlashFS library code is not included in the project by default to reduce the application code size. You must include the file HTTP_uif.c, which contains the interface functions for the Flash File System and SD-Card.
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