€• /Œsphinx.addnodes”Œdocument”“”)”}”(Œ rawsource”Œ”Œchildren”]”(Œ translations”Œ LanguagesNode”“”)”}”(hhh]”(hŒ pending_xref”“”)”}”(hhh]”Œdocutils.nodes”ŒText”“”ŒChinese (Simplified)”…””}”Œparent”hsbaŒ attributes”}”(Œids”]”Œclasses”]”Œnames”]”Œdupnames”]”Œbackrefs”]”Œ refdomain”Œstd”Œreftype”Œdoc”Œ reftarget”Œ-/translations/zh_CN/driver-api/gpio/bt8xxgpio”Œmodname”NŒ classname”NŒ refexplicit”ˆuŒtagname”hhh ubh)”}”(hhh]”hŒChinese (Traditional)”…””}”hh2sbah}”(h]”h ]”h"]”h$]”h&]”Œ refdomain”h)Œreftype”h+Œ reftarget”Œ-/translations/zh_TW/driver-api/gpio/bt8xxgpio”Œmodname”NŒ classname”NŒ refexplicit”ˆuh1hhh ubh)”}”(hhh]”hŒItalian”…””}”hhFsbah}”(h]”h ]”h"]”h$]”h&]”Œ refdomain”h)Œreftype”h+Œ reftarget”Œ-/translations/it_IT/driver-api/gpio/bt8xxgpio”Œmodname”NŒ classname”NŒ refexplicit”ˆuh1hhh ubh)”}”(hhh]”hŒJapanese”…””}”hhZsbah}”(h]”h ]”h"]”h$]”h&]”Œ refdomain”h)Œreftype”h+Œ reftarget”Œ-/translations/ja_JP/driver-api/gpio/bt8xxgpio”Œmodname”NŒ classname”NŒ refexplicit”ˆuh1hhh ubh)”}”(hhh]”hŒKorean”…””}”hhnsbah}”(h]”h ]”h"]”h$]”h&]”Œ refdomain”h)Œreftype”h+Œ reftarget”Œ-/translations/ko_KR/driver-api/gpio/bt8xxgpio”Œmodname”NŒ classname”NŒ refexplicit”ˆuh1hhh ubh)”}”(hhh]”hŒSpanish”…””}”hh‚sbah}”(h]”h ]”h"]”h$]”h&]”Œ refdomain”h)Œreftype”h+Œ reftarget”Œ-/translations/sp_SP/driver-api/gpio/bt8xxgpio”Œmodname”NŒ classname”NŒ refexplicit”ˆuh1hhh ubeh}”(h]”h ]”h"]”h$]”h&]”Œcurrent_language”ŒEnglish”uh1h hhŒ _document”hŒsource”NŒline”NubhŒsection”“”)”}”(hhh]”(hŒtitle”“”)”}”(hŒCA driver for a selfmade cheap BT8xx based PCI GPIO-card (bt8xxgpio)”h]”hŒCA driver for a selfmade cheap BT8xx based PCI GPIO-card (bt8xxgpio)”…””}”(hh¨hžhhŸNh Nubah}”(h]”h ]”h"]”h$]”h&]”uh1h¦hh£hžhhŸŒG/var/lib/git/docbuild/linux/Documentation/driver-api/gpio/bt8xxgpio.rst”h KubhŒ paragraph”“”)”}”(hŒLFor advanced documentation, see https://bues.ch/cms/unmaintained/btgpio.html”h]”(hŒ For advanced documentation, see ”…””}”(hh¹hžhhŸNh NubhŒ reference”“”)”}”(hŒ,https://bues.ch/cms/unmaintained/btgpio.html”h]”hŒ,https://bues.ch/cms/unmaintained/btgpio.html”…””}”(hhÃhžhhŸNh Nubah}”(h]”h ]”h"]”h$]”h&]”Œrefuri”hÅuh1hÁhh¹ubeh}”(h]”h ]”h"]”h$]”h&]”uh1h·hŸh¶h Khh£hžhubh¸)”}”(hXA generic digital 24-port PCI GPIO card can be built out of an ordinary Brooktree bt848, bt849, bt878 or bt879 based analog TV tuner card. The Brooktree chip is used in old analog Hauppauge WinTV PCI cards. You can easily find them used for low prices on the net.”h]”hXA generic digital 24-port PCI GPIO card can be built out of an ordinary Brooktree bt848, bt849, bt878 or bt879 based analog TV tuner card. The Brooktree chip is used in old analog Hauppauge WinTV PCI cards. You can easily find them used for low prices on the net.”…””}”(hhØhžhhŸNh Nubah}”(h]”h ]”h"]”h$]”h&]”uh1h·hŸh¶h Khh£hžhubh¸)”}”(hŒoThe bt8xx chip does have 24 digital GPIO ports. These ports are accessible via 24 pins on the SMD chip package.”h]”hŒoThe bt8xx chip does have 24 digital GPIO ports. These ports are accessible via 24 pins on the SMD chip package.”…””}”(hhæhžhhŸNh Nubah}”(h]”h ]”h"]”h$]”h&]”uh1h·hŸh¶h K hh£hžhubh¢)”}”(hhh]”(h§)”}”(hŒ&How to physically access the GPIO pins”h]”hŒ&How to physically access the GPIO pins”…””}”(hh÷hžhhŸNh Nubah}”(h]”h ]”h"]”h$]”h&]”uh1h¦hhôhžhhŸh¶h Kubh¸)”}”(hX%The are several ways to access these pins. One might unsolder the whole chip and put it on a custom PCI board, or one might only unsolder each individual GPIO pin and solder that to some tiny wire. As the chip package really is tiny there are some advanced soldering skills needed in any case.”h]”hX%The are several ways to access these pins. One might unsolder the whole chip and put it on a custom PCI board, or one might only unsolder each individual GPIO pin and solder that to some tiny wire. As the chip package really is tiny there are some advanced soldering skills needed in any case.”…””}”(hjhžhhŸNh Nubah}”(h]”h ]”h"]”h$]”h&]”uh1h·hŸh¶h Khhôhžhubh¸)”}”(hŒbThe physical pinouts are drawn in the following ASCII art. The GPIO pins are marked with G00-G23::”h]”hŒaThe physical pinouts are drawn in the following ASCII art. The GPIO pins are marked with G00-G23:”…””}”(hjhžhhŸNh Nubah}”(h]”h ]”h"]”h$]”h&]”uh1h·hŸh¶h KhhôhžhubhŒ literal_block”“”)”}”(hXa G G G G G G G G G G G G G G G G G G 0 0 0 0 0 0 0 0 0 0 1 1 1 1 1 1 1 1 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | --------------------------------------------------------------------------- --| ^ ^ |-- --| pin 86 pin 67 |-- --| |-- --| pin 61 > |-- G18 --| |-- G19 --| |-- G20 --| |-- G21 --| |-- G22 --| pin 56 > |-- G23 --| |-- --| Brooktree 878/879 |-- --| |-- --| |-- --| |-- --| |-- --| |-- --| |-- --| |-- --| |-- --| |-- --| |-- --| |-- --| |-- --| |-- --| O |-- --| |-- --------------------------------------------------------------------------- | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | ^ This is pin 1”h]”hXa G G G G G G G G G G G G G G G G G G 0 0 0 0 0 0 0 0 0 0 1 1 1 1 1 1 1 1 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | --------------------------------------------------------------------------- --| ^ ^ |-- --| pin 86 pin 67 |-- --| |-- --| pin 61 > |-- G18 --| |-- G19 --| |-- G20 --| |-- G21 --| |-- G22 --| pin 56 > |-- G23 --| |-- --| Brooktree 878/879 |-- --| |-- --| |-- --| |-- --| |-- --| |-- --| |-- --| |-- --| |-- --| |-- --| |-- --| |-- --| |-- --| |-- --| O |-- --| |-- --------------------------------------------------------------------------- | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | ^ This is pin 1”…””}”hj#sbah}”(h]”h ]”h"]”h$]”h&]”Œ xml:space”Œpreserve”uh1j!hŸh¶h Khhôhžhubeh}”(h]”Œ&how-to-physically-access-the-gpio-pins”ah ]”h"]”Œ&how to physically access the gpio pins”ah$]”h&]”uh1h¡hh£hžhhŸh¶h Kubeh}”(h]”ŒAa-driver-for-a-selfmade-cheap-bt8xx-based-pci-gpio-card-bt8xxgpio”ah ]”h"]”ŒCa driver for a selfmade cheap bt8xx based pci gpio-card (bt8xxgpio)”ah$]”h&]”uh1h¡hhhžhhŸh¶h Kubeh}”(h]”h ]”h"]”h$]”h&]”Œsource”h¶uh1hŒcurrent_source”NŒ current_line”NŒsettings”Œdocutils.frontend”ŒValues”“”)”}”(h¦NŒ generator”NŒ datestamp”NŒ source_link”NŒ source_url”NŒ toc_backlinks”Œentry”Œfootnote_backlinks”KŒ sectnum_xform”KŒstrip_comments”NŒstrip_elements_with_classes”NŒ strip_classes”NŒ report_level”KŒ halt_level”KŒexit_status_level”KŒdebug”NŒwarning_stream”NŒ traceback”ˆŒinput_encoding”Œ utf-8-sig”Œinput_encoding_error_handler”Œstrict”Œoutput_encoding”Œutf-8”Œoutput_encoding_error_handler”jfŒerror_encoding”Œutf-8”Œerror_encoding_error_handler”Œbackslashreplace”Œ language_code”Œen”Œrecord_dependencies”NŒconfig”NŒ id_prefix”hŒauto_id_prefix”Œid”Œ dump_settings”NŒdump_internals”NŒdump_transforms”NŒdump_pseudo_xml”NŒexpose_internals”NŒstrict_visitor”NŒ_disable_config”NŒ_source”h¶Œ _destination”NŒ _config_files”]”Œ7/var/lib/git/docbuild/linux/Documentation/docutils.conf”aŒfile_insertion_enabled”ˆŒ raw_enabled”KŒline_length_limit”M'Œpep_references”NŒ pep_base_url”Œhttps://peps.python.org/”Œpep_file_url_template”Œpep-%04d”Œrfc_references”NŒ rfc_base_url”Œ&https://datatracker.ietf.org/doc/html/”Œ tab_width”KŒtrim_footnote_reference_space”‰Œsyntax_highlight”Œlong”Œ smart_quotes”ˆŒsmartquotes_locales”]”Œcharacter_level_inline_markup”‰Œdoctitle_xform”‰Œ docinfo_xform”KŒsectsubtitle_xform”‰Œ image_loading”Œlink”Œembed_stylesheet”‰Œcloak_email_addresses”ˆŒsection_self_link”‰Œenv”NubŒreporter”NŒindirect_targets”]”Œsubstitution_defs”}”Œsubstitution_names”}”Œrefnames”}”Œrefids”}”Œnameids”}”(j@j=j8j5uŒ nametypes”}”(j@‰j8‰uh}”(j=h£j5hôuŒ footnote_refs”}”Œ citation_refs”}”Œ autofootnotes”]”Œautofootnote_refs”]”Œsymbol_footnotes”]”Œsymbol_footnote_refs”]”Œ footnotes”]”Œ citations”]”Œautofootnote_start”KŒsymbol_footnote_start”KŒ id_counter”Œ collections”ŒCounter”“”}”…”R”Œparse_messages”]”Œtransform_messages”]”Œ transformer”NŒ include_log”]”Œ decoration”Nhžhub.