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ESP32 RMT Implementation#5184

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Commits on Nov 11, 2019

• First commit of RMT tx implementation

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• Add TODO, complete config init, add deinit method, tidy up resolution calculation.

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• Allow lists or tuple to be used to define tuples - throw exception if other type detected.

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• Improved some error handling

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• Make start_level an optional keyword argument.

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• The start of documentation for RMT

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• Updated quickref, incorporating mcauser's suggestion. Also updated quickref example code.

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• Set the idle output level of the RMT channel to zero.

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Commits on Nov 13, 2019

• Handle deinit correctly - when calling deinit on an RMT object and when soft resets occur.

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Commits on Nov 26, 2019

• RMT.send_pulses is now non-blocking. Also fewer memory allocations, since internal buffer is reused (and reallocated if necessary). Updated the way resources are freed - now simpler and more robust.

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Commits on Nov 28, 2019

• Remove remnants of start_level to start rename.

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Commits on Dec 5, 2019

• Tidy up the ESP32 RMT docs - a clearer description in the quickref

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Commits on Dec 6, 2019

• Add wait_done to allow user to query whether pulses are currently being transmitted

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• Added a simplistic way to enabled loop tx

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Commits on Dec 14, 2019

• Provide accessors for the clock divider and source clock. Remove resolution and maximum pulse length which can be inferred.

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Commits on Dec 16, 2019

• Update RMT documentation

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• Rename clock_divider->clock_div, make it an optional keyword parameter. Change pin to a required keyword parameter.

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• Provide more explanation of RMT in the reference documentation, moving it from the Quick Ref

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• Remove debug printf's

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Commits on Dec 18, 2019

• Prefer to use the non-legacy type checks

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