Keil Logo

Technical Support

On-Line Manuals

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

TFTP Client

The Trivial File Transfer Protocol (TFTP) is a very simple protocol used to transfer files. Using this protocol, you can send files to the System or read files from it. This protocol can be used, for example, for Firmware Upgrade.

The following TFTP Client options are configurable from the Net_Config.c configuration file:

  • TFTP Client switch enables or disables the TFTP Client service in your application. It is enabled when this value is set to 1. It should be set to 0 when TFTP client is not used in your application.
    #define TFTPC_ENABLE   1
  • Block Size specifies the size of transfer block in bytes. Values can be selected from a list. The default value is 512 bytes.
    #define TFTPC_BLOCKSZ  512
  • Number of Retries specifies how many times the TFTP Client tries to retransmit the data before giving up. The default value is 4.
    #define TFTPC_MAXRETRY 4
  • Retry Timeout is the timeout, after which the TFTP Client retransmits the data. Values, specified in milliseconds, can be selected from a list. The default value is 500 ms, represented as #define TFTPC_RETRYTO 5
    #define TFTPC_RETRYTO  5


  • You also need to add the TFTPC_uif.c user interface module to your project and customize it. This file is in the \Keil\ARM\RL\TCPnet\User folder.
  • When the TFTP client is not enabled, the ARM linker does not link the TFTP support modules to your application and thus reduces the code size and memory usage.
  Arm logo
Important information

This site uses cookies to store information on your computer. By continuing to use our site, you consent to our cookies.

Change Settings

Privacy Policy Update

Arm’s Privacy Policy has been updated. By continuing to use our site, you consent to Arm’s Privacy Policy. Please review our Privacy Policy to learn more about our collection, use and transfers
of your data.