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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
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XML Example
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SOAP Support
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Large POST Messages
Web Pages
Default Page
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Web on SD Card
Web Update
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How it works
Internal Web
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Multi-user Authentication
Using RAM File System
FCARM File Converter
PRINT Directive
NOPRINT Directive
PAGEWIDTH Directive
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ROOT Directive
Telnet Server
Command Line Interface
Multi-user Authentication
Sending Reply Message
Short Reply
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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
Interrupt Mode
The Interrupt Device Driver gives you better performance and eliminates the risk of losing a packet when the system reaction time is slow. This can happen if the ethernet traffic is high and the user event function takes very long to process.
When the ethernet controller integrates a small memory buffer (for example a couple of kilobytes), the interrupt mode is necessary to prevent possible packet reception problems.
The required functions for implementation of the driver are:
- init_ethernet() - initializes the ethernet controller
- interrupt_ethernet() - interrupt service routine that reads the packet out of the ethernet controller's buffer and stores it to the RAM buffer
- send_frame() - writes a packet to the ethernet controller
- int_disable_eth() - disables the interrupts of the ethernet controller
- int_enable_eth() - enables the interrupts of the ethernet controller.
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