mirror of
https://github.com/RobTillaart/Arduino.git
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52 lines
1.8 KiB
Markdown
52 lines
1.8 KiB
Markdown
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[](https://github.com/marketplace/actions/arduino_ci)
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[](https://github.com/RobTillaart/ShiftOutSlow/blob/master/LICENSE)
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[](https://github.com/RobTillaart/ShiftOutSlow/releases)
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# ShiftOutSlow
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Arduino library for shiftOut with build-in delay - e.g. for 74HC595
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A library for shiftInSlow also exist.
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## Description
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ShiftOutSlow is an experimental library that has a build in delay (in microseconds) that allows tuning the time per bit.
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This allows one to improve reliability e.g. when using longer lines.
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The datapin and clockpin are set in the constructor, the delay is settable per byte send to be able to optimize runtime.
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ShiftOutSlow implements the print interface.
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## Performance
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The performance of **write()** with a delay of 0 microseconds is slower than the default Arduino
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**shiftOut()** due to some overhead.
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The delay requested is split in two (expect rounding errors) to have "nice" looking pulses.
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## Interface
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The interface exists of the following functions:
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- **ShiftOutSlow(datapin, clockpin, bitorder = LSBFIRST)** constructor.
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- **size_t write(uint8_t data)** writes a new value
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- **uint8_t lastWritten()** returns last value written
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- **void setDelay(uint16_t microseconds)** set delay per bit from 0 .. 65535 microseconds.
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- **uint16_t getDelay()** returns the set delay in microseconds.
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- **bool setBitOrder(bitOrder)** set LSBFIRST or MSBFIRST. Returns false for other values.
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- **uint8_t getBitOrder(void)** returns LSBFIRST or MSBFIRST
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## Notes
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- to be tested
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## Operation
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See examples
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