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| [[File:Buspirate v3 front.jpg|thumb|right|<small>Bus Pirate v3, front</small>]]
| | {{#externalredirect: https://www.flashrom.org/supported_hw/supported_prog/buspirate.html }} |
| [[File:Buspirate v3 back.jpg|thumb|right|<small>Bus Pirate v3, back</small>]]
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| [[File:Lycom-pe115-flashrom-buspirate-2.jpg|thumb|right|<small>Recovering a bricked SPI based device using a Bus Pirate</small>]]
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| The [http://dangerousprototypes.com/docs/Bus_Pirate Bus Pirate] is an open source design for a multi-purpose chip-level serial protocol transceiver and debugger. Flashrom supports the Bus Pirate for [http://dangerousprototypes.com/bus-pirate-manual/bus-pirate-spi-guide/ SPI programming]. It also has [http://dangerousprototypes.com/docs/Bus_Pirate_binary_SPI_sniffer_utility SPI sniffing] functionality, which may come in useful for analysing chip or programmer behaviour.
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| They are available for around US$30 from various sources.
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| == Usage ==
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| $ '''flashrom -p buspirate_spi:dev=''/dev/device'',spispeed=''frequency'' '''
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| Example:
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| $ '''flashrom -p buspirate_spi:dev=/dev/ttyUSB0,spispeed=1M'''
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| == Trouble Shooting ==
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| The Bus Pirate has various options for SPI communication. Many SPI chips support the JEDEC standard identify command, which can be issued from the Bus Pirate prompt like this:
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| [0x9f r:4]
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| You'll need to refer to the flash chip datasheet to see how it should respond to this.
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| In circuit programming it often possible, '''so long as no other devices on the SPI bus are trying to access the device'''.
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| See also [[ISP]] for more details about in-system flashing in general.
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| == Speedup ==
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| A beta firmware build exists, to speed up the buspirate. See this post on dangerousprototypes.com:
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| http://dangerousprototypes.com/forum/viewtopic.php?f=40&t=3864&start=15#p41505
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| http://dangerousprototypes.com/docs/Bus_Pirate#Firmware_upgrades
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