Add General Call addressing to AVR8Bit TWI - Define backward compatible API to be used for other cores #1

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edbaafi wants to merge 1 commit intoWiringProject:masterfrom

Commits on Nov 12, 2011

Added ability for an AVR8Bit TWI slave to respond to general call address (broadcast) in addition to its own address. TwoWire::onReceive is overridden with a second function pointer to a general c…
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