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EtherCAT master TODO

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$Id$

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Version 1.5.0:

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* Distributed clocks:

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    - Delay calculation.

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    - Use common application time offset when setting start times.

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    - Check 32/64 bit operations.

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    - Set system time offset only when application time available.

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* Fix unloading problem of ec_e100 driver.

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* Use ec_datagram_zero() where possible.

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* Fix arguments of reg_read.

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* Sign/Abs type for reg_ commands?

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* Number layout for reg_read.

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* Show Record / Array / List type of SDOs.

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* Limit bandwidth of state machine datagram.

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* Read alias from register 0x0012 instead of SII.

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* Finish library implementation.

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* Re-work EoE code.

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* Replace locking callbacks.

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* Implement EoE callbacks for library.

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* Rescan command.

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* Override sync manager size?

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* Remove ecrt_domain_state()?

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* Check force_config flag before error.

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* Remove allow_scanning flag.

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* Test File access over EtherCAT (FoE) reading.

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* Implement ecrt_master_slave() in kernel space.

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* Check for ioctl() interface version.

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* Improve application-triggered SDO transfers by moving the statemachine into

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  the SDO handlers.

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* Apply watchdog patches from J. Mohre.

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Future issues:

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* Segmented SDO downloads.

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* External memory for SDO transfers.

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* Bus information via userspace library (slaves, sync managers, PDOs, entries).

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* C++ implementation of the library.

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* Bus simulator interface.

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* Move master threads, slave handlers and state machines into a user

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  space daemon.

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* Allow master requesting when in ORPHANED phase

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* Mailbox protocol handlers.

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* Mailbox state machine using toggle bits.

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* Mailbox gateway.

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* Separate CoE debugging.

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* Evaluate EEPROM contents after writing.

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* Optimize alignment of process data.

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* Redundancy with 2 network adapters.

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* Interface/buffers for asynchronous domain IO.

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* Make scanning and configuration run parallel (each).

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* ethercat tool:

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    - Data type abbreviations.

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    - Add a -n (numeric) switch.

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	- Check for unwanted options.

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* Simplify master fsm by introducing a common request state to handle external

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  requests (replace write_sii, sdo_request, etc).

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Smaller issues:

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* Stop master thread at ecrt_master_request() to get rid of allow_* flags?

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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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* Fix datagram errors on application loading/unloading.

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Less important issues:

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* Allow VLAN tagging.

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* Determine number of frames, the NIC can handle.

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