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EtherCAT master TODO

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$Id$

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Version 1.4.0:

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* Remove the end state of the master state machine.

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* Supply new ec_master_state_t.

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* Implement ecrt_slave_config_state().

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* Make ecrt_master_slave_config() return no error when slave is not present

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  or invalid.

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* Remove get_cycles() calls and references to cpu_khz to increase

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  portability.

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* Adapt remaining examples.

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* READMEs for examples.

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* Separate Pdo and Pdo entry classes.

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* Add something like lsec -n to show numeric vendor IDs.

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* Separate CoE debugging.

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* Evaluate EEPROM contents after writing.

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Future issues:

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* Distributed clocks.

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* Move slave handlers and state machines, etc. into a user space daemon (move

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  kernel threads to user space daemon with a TCP interface replacing the

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  cdev).

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* Mailbox gateway.

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* Redundancy with 2 network adapters.

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* Interface/buffers for asynchronous domain IO.

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Smaller issues:

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* Evaluate SII Size field (0x003E) to determine maximum SII memory size.

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* Unite fsm_pdo_mapping, fsm_pdo_config and fsm_coe_map.

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* Clear sync managers in INIT.

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* Read out CRC counters.

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* Configure slave ports to automatically open on link detection.

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* Only execute one EoE handler per EoE cycle.

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Less important issues:

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* File access over EtherCAT (FoE).

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* Allow VLAN tagging.

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* Determine number of frames, the NIC can handle.

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