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git-svn-id: svn://svn.code.sf.net/p/chibios/svn/trunk@1008 35acf78f-673a-0410-8e92-d51de3d6d3f4

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gdisirio 2009-06-01 20:54:39 +00:00
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@ -360,11 +360,14 @@
* @details This module defines an abstract interface for digital I/O ports. * @details This module defines an abstract interface for digital I/O ports.
* Note that no code is present, I/O ports are just a set of macros that must * Note that no code is present, I/O ports are just a set of macros that must
* be implemented by an @ref IOPortsLLD.<br> * be implemented by an @ref IOPortsLLD.<br>
* This system has the advantage to make the access to I/O ports platform
* independent from the implementation logic.<br>
* Currently the I/O ports interface does not handle physical port programming * Currently the I/O ports interface does not handle physical port programming
* like direction, pull up/down resistors etc. The interface only allows input * like direction, pull up/down resistors etc. The interface only allows input
* and output operations but this may change in future releases. * and output operations but this may change in future releases.<br>
* This system has the advantage to make the access to I/O ports platform * Note that the @ref IOPortsLLD may also offer non standard macro and
* independent from the implementation logic. * functions in order to support specific features but, of course, the use of
* such interfaces would not be portable.
* *
* <h2>Implementation Rules</h2> * <h2>Implementation Rules</h2>
* In implementing an @ref IOPortsLLD there are some rules/behaviors that * In implementing an @ref IOPortsLLD there are some rules/behaviors that