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Bit banging allows a device to implement different protocols with minimal or no hardware changes. In some cases, bit banging is made feasible by newer, faster processors because more recent hardware operates much more quickly than hardware did when standard communications protocols were created.
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The question whether to deploy bit banging or not is a trade-off between load, performance and reliability on one hand, and the availability of a hardware alternative on the other. The software emulation process consumes more processing power than does supporting dedicated hardware. The
538:(a DOS driver by Ciriaco García de Celis utilizing bit-banging to support non-standard ultra-high capacity floppy disk formats "bypassing" the normal floppy controller logic, a similar program for Amiga floppies is Vincent Joguin's Disk2FDI)
183:) to transmit and receive, respectively, and is responsible for meeting all timing requirements and protocol sequencing of the signals. In contrast to bit banging, dedicated hardware (e.g.,
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microcontroller spends much of its time sending or receiving samples to and from the pins, at the expense of other tasks. The signal produced usually has more
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are available. The implementation in software can be a solution when specific hardware support is not available or requires a more expensive microcontroller.
550:(VM) (implementing virtual device drivers emulating actual hardware controllers sometimes involves utilizing programming techniques similar to bit banging)
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that employs software as a substitute for dedicated hardware to generate transmitted signals or process received signals. Such software directly sets and
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544:(on MDA, HGC, CGA and EGA PC-compatible graphics cards the sensor of an optional light pen could be read in a fashion similar to bit banging)
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to relax software timing requirements. Bit banging can be implemented at very low cost, and is commonly used in
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Using software instead of dedicated hardware to process and make use of signals
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387:// pulse the clock state to indicate that bit value should be read
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Programming and customizing PICmicro microcontrollers
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SPI bus - simultaneously transmit and receive a byte
75:. Unsourced material may be challenged and removed.
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659:Efficient bit-banged SPI for 8051 microcontroller
420:// shift byte left so next bit will be leftmost
339:// set line high if bit is 1, low if bit is 0
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231:code example transmits a byte of data on an
630:Bit banging for Async Serial Communication
135:Learn how and when to remove this message
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240:// transmit byte serially, MSB first
73:adding citations to reliable sources
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625:Notes on bit-banging async serial
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60:needs additional citations for
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504:Bit twiddler (disambiguation)
276:// select device (active low)
647:I2C on AVR using bit banging
619:Asynchronous serial (RS-232)
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560:Polling (computer science)
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589:McGraw-Hill Professional
579:Predko, Michael (2000).
336:// consider leftmost bit
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30:Not to be confused with
509:Bit-serial architecture
635:Bit banging for RS-232
554:Software-defined radio
524:Integrated Woz Machine
153:electrical engineering
246:send_8bit_serial_data
149:computer engineering
69:improve this article
514:1-bit architecture
438:// deselect device
167:for any method of
679:Signal processing
674:Data transmission
602:978-0-07-136172-9
291:// send bits 7..0
179:(e.g., pins on a
169:data transmission
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84:"Bit banging"
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80:Find sources:
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32:Bit-twiddling
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67:Please help
62:verification
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591:. pp.
519:Fast loader
441:output_high
408:output_high
360:output_high
197:data buffer
165:term of art
161:bit bashing
157:bit banging
40:Bit-banding
36:Bit-slicing
18:Bit-banging
668:Categories
566:References
499:Bit stream
390:output_low
375:output_low
279:output_low
229:C language
221:See also:
215:See also:
95:newspapers
542:Light pen
474:interrupt
426:<<=
125:July 2014
488:See also
478:RTS, CTS
470:glitches
252:unsigned
653:SPI bus
641:I²C bus
173:samples
109:scholar
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466:jitter
414:SD_CLK
396:SD_CLK
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595:–12.
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447:SD_CS
402:delay
381:SD_DI
366:SD_DI
351:&
285:SD_CS
235:bus.
177:GPIOs
163:is a
116:JSTOR
102:books
38:, or
597:ISBN
530:FTDI
423:data
372:else
354:0x80
348:data
315:<
258:data
255:char
243:void
185:UART
151:and
88:news
482:DCD
468:or
405:();
294:for
267:int
233:SPI
193:I²C
189:SPI
159:or
147:In
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