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RL-ARM User's Guide
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RL-TCPnet
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Configuring RL-TCPnet
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Appendix
RL-ARM User's Guide
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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