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YEN SIGN h]h¥}hj8sbah}(h]h ]h"]yenah$]h&]uh1hhhhKRhhhhubhsection)}(hhh](htitle)}(hC2 port supporth]hC2 port support}(hjNhhhNhNubah}(h]h ]h"]h$]h&]uh1jLhjIhhhhhKubhenumerated_list)}(hhh]h list_item)}(h8Copyright 2007 Rodolfo Giometti h]h paragraph)}(h7Copyright 2007 Rodolfo Giometti h](h!Copyright 2007 Rodolfo Giometti <}(hjihhhNhNubh reference)}(hgiometti@enneenne.comh]hgiometti@enneenne.com}(hjshhhNhNubah}(h]h ]h"]h$]h&]refurimailto:giometti@enneenne.comuh1jqhjiubh>}(hjihhhNhNubeh}(h]h ]h"]h$]h&]uh1jghhhKhjcubah}(h]h ]h"]h$]h&]uh1jahj^hhhhhNubah}(h]h ]h"]h$]h&]enumtype upperalphaprefix(suffix)startKuh1j\hjIhhhhhKubjh)}(hThis program is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation; either version 2 of the License, or (at your option) any later version.h]hThis program is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation; either version 2 of the License, or (at your option) any later version.}(hjhhhNhNubah}(h]h ]h"]h$]h&]uh1jghhhK hjIhhubjh)}(hThis program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details.h]hThis program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details.}(hjhhhNhNubah}(h]h ]h"]h$]h&]uh1jghhhKhjIhhubjH)}(hhh](jM)}(hOverviewh]hOverview}(hjhhhNhNubah}(h]h ]h"]h$]h&]uh1jLhjhhhhhKubjh)}(hThis driver implements the support for Linux of Silicon Labs (Silabs) C2 Interface used for in-system programming of micro controllers.h]hThis driver implements the support for Linux of Silicon Labs (Silabs) C2 Interface used for in-system programming of micro controllers.}(hjhhhNhNubah}(h]h ]h"]h$]h&]uh1jghhhKhjhhubjh)}(hBy using this driver you can reprogram the in-system flash without EC2 or EC3 debug adapter. This solution is also useful in those systems where the micro controller is connected via special GPIOs pins.h]hBy using this driver you can reprogram the in-system flash without EC2 or EC3 debug adapter. This solution is also useful in those systems where the micro controller is connected via special GPIOs pins.}(hjhhhNhNubah}(h]h ]h"]h$]h&]uh1jghhhKhjhhubeh}(h]overviewah ]h"]overviewah$]h&]uh1jGhjIhhhhhKubjH)}(hhh](jM)}(h Referencesh]h References}(hjhhhNhNubah}(h]h ]h"]h$]h&]uh1jLhjhhhhhK!ubjh)}(haThe C2 Interface main references are at (https://www.silabs.com) Silicon Laboratories site], see:h](h)The C2 Interface main references are at (}(hjhhhNhNubjr)}(hhttps://www.silabs.comh]hhttps://www.silabs.com}(hj hhhNhNubah}(h]h ]h"]h$]h&]refurij uh1jqhjubh") Silicon Laboratories site], see:}(hjhhhNhNubeh}(h]h ]h"]h$]h&]uh1jghhhK#hjhhubh bullet_list)}(hhh](jb)}(hrAN127: FLASH Programming via the C2 Interface at https://www.silabs.com/Support Documents/TechnicalDocs/an127.pdf h]jh)}(hqAN127: FLASH Programming via the C2 Interface at https://www.silabs.com/Support Documents/TechnicalDocs/an127.pdfh](h1AN127: FLASH Programming via the C2 Interface at }(hj,hhhNhNubjr)}(hhttps://www.silabs.com/Supporth]hhttps://www.silabs.com/Support}(hj4hhhNhNubah}(h]h ]h"]h$]h&]refurij6uh1jqhj,ubh" Documents/TechnicalDocs/an127.pdf}(hj,hhhNhNubeh}(h]h ]h"]h$]h&]uh1jghhhK&hj(ubah}(h]h ]h"]h$]h&]uh1jahj%hhhhhNubjb)}(hC2 Specification at https://www.silabs.com/pages/DownloadDoc.aspx?FILEURL=Support%20Documents/TechnicalDocs/an127.pdf&src=SearchResults h]jh)}(hC2 Specification at https://www.silabs.com/pages/DownloadDoc.aspx?FILEURL=Support%20Documents/TechnicalDocs/an127.pdf&src=SearchResultsh](hC2 Specification at }(hjWhhhNhNubjr)}(hshttps://www.silabs.com/pages/DownloadDoc.aspx?FILEURL=Support%20Documents/TechnicalDocs/an127.pdf&src=SearchResultsh]hshttps://www.silabs.com/pages/DownloadDoc.aspx?FILEURL=Support%20Documents/TechnicalDocs/an127.pdf&src=SearchResults}(hj_hhhNhNubah}(h]h ]h"]h$]h&]refurijauh1jqhjWubeh}(h]h ]h"]h$]h&]uh1jghhhK)hjSubah}(h]h ]h"]h$]h&]uh1jahj%hhhhhNubeh}(h]h ]h"]h$]h&]bullet-uh1j#hhhK&hjhhubjh)}(hXhowever it implements a two wire serial communication protocol (bit banging) designed to enable in-system programming, debugging, and boundary-scan testing on low pin-count Silicon Labs devices. Currently this code supports only flash programming but extensions are easy to add.h]hXhowever it implements a two wire serial communication protocol (bit banging) designed to enable in-system programming, debugging, and boundary-scan testing on low pin-count Silicon Labs devices. Currently this code supports only flash programming but extensions are easy to add.}(hjhhhNhNubah}(h]h ]h"]h$]h&]uh1jghhhK,hjhhubeh}(h] referencesah ]h"] referencesah$]h&]uh1jGhjIhhhhhK!ubjH)}(hhh](jM)}(hUsing the driverh]hUsing the driver}(hjhhhNhNubah}(h]h ]h"]h$]h&]uh1jLhjhhhhhK3ubjh)}(hhOnce the driver is loaded you can use sysfs support to get C2port's info or read/write in-system flash::h]hiOnce the driver is loaded you can use sysfs support to get C2port’s info or read/write in-system flash:}(hjhhhNhNubah}(h]h ]h"]h$]h&]uh1jghhhK5hjhhubh literal_block)}(h# ls /sys/class/c2port/c2port0/ access flash_block_size flash_erase rev_id dev_id flash_blocks_num flash_size subsystem/ flash_access flash_data reset ueventh]h# ls /sys/class/c2port/c2port0/ access flash_block_size flash_erase rev_id dev_id flash_blocks_num flash_size subsystem/ flash_access flash_data reset uevent}hjsbah}(h]h ]h"]h$]h&]hhuh1jhhhK8hjhhubjh)}(hInitially the C2port access is disabled since you hardware may have such lines multiplexed with other devices so, to get access to the C2port, you need the command::h]hInitially the C2port access is disabled since you hardware may have such lines multiplexed with other devices so, to get access to the C2port, you need the command:}(hjhhhNhNubah}(h]h ]h"]h$]h&]uh1jghhhK=hjhhubj)}(h+# echo 1 > /sys/class/c2port/c2port0/accessh]h+# echo 1 > /sys/class/c2port/c2port0/access}hjsbah}(h]h ]h"]h$]h&]hhuh1jhhhKAhjhhubjh)}(h\after that you should read the device ID and revision ID of the connected micro controller::h]h[after that you should read the device ID and revision ID of the connected micro controller:}(hjhhhNhNubah}(h]h ]h"]h$]h&]uh1jghhhKChjhhubj)}(hQ# cat /sys/class/c2port/c2port0/dev_id 8 # cat /sys/class/c2port/c2port0/rev_id 1h]hQ# cat /sys/class/c2port/c2port0/dev_id 8 # cat /sys/class/c2port/c2port0/rev_id 1}hjsbah}(h]h ]h"]h$]h&]hhuh1jhhhKFhjhhubjh)}(hmHowever, for security reasons, the in-system flash access in not enabled yet, to do so you need the command::h]hlHowever, for security reasons, the in-system flash access in not enabled yet, to do so you need the command:}(hjhhhNhNubah}(h]h ]h"]h$]h&]uh1jghhhKKhjhhubj)}(h1# echo 1 > /sys/class/c2port/c2port0/flash_accessh]h1# echo 1 > /sys/class/c2port/c2port0/flash_access}hj sbah}(h]h ]h"]h$]h&]hhuh1jhhhKNhjhhubjh)}(h)After that you can read the whole flash::h]h(After that you can read the whole flash:}(hjhhhNhNubah}(h]h ]h"]h$]h&]uh1jghhhKPhjhhubj)}(h2# cat /sys/class/c2port/c2port0/flash_data > imageh]h2# cat /sys/class/c2port/c2port0/flash_data > image}hj)sbah}(h]h ]h"]h$]h&]hhuh1jhhhKRhjhhubjh)}(h erase it::h]h erase it:}(hj7hhhNhNubah}(h]h ]h"]h$]h&]uh1jghhhKThjhhubj)}(h0# echo 1 > /sys/class/c2port/c2port0/flash_eraseh]h0# echo 1 > /sys/class/c2port/c2port0/flash_erase}hjEsbah}(h]h ]h"]h$]h&]hhuh1jhhhKVhjhhubjh)}(hand write it::h]h and write it:}(hjShhhNhNubah}(h]h ]h"]h$]h&]uh1jghhhKXhjhhubj)}(h2# cat image > /sys/class/c2port/c2port0/flash_datah]h2# cat image > /sys/class/c2port/c2port0/flash_data}hjasbah}(h]h ]h"]h$]h&]hhuh1jhhhKZhjhhubjh)}(hDafter writing you have to reset the device to execute the new code::h]hCafter writing you have to reset the device to execute the new code:}(hjohhhNhNubah}(h]h ]h"]h$]h&]uh1jghhhK\hjhhubj)}(h*# echo 1 > /sys/class/c2port/c2port0/reseth]h*# echo 1 > /sys/class/c2port/c2port0/reset}hj}sbah}(h]h ]h"]h$]h&]hhuh1jhhhK^hjhhubeh}(h]using-the-driverah ]h"]using the driverah$]h&]uh1jGhjIhhhhhK3ubeh}(h]c2-port-supportah ]h"]c2 port supportah$]h&]uh1jGhhhhhhhKubeh}(h]h ]h"]h$]h&]sourcehuh1hcurrent_sourceN current_lineNsettingsdocutils.frontendValues)}(jLN generatorN datestampN source_linkN source_urlN toc_backlinksentryfootnote_backlinksK sectnum_xformKstrip_commentsNstrip_elements_with_classesN strip_classesN report_levelK halt_levelKexit_status_levelKdebugNwarning_streamN tracebackinput_encoding utf-8-siginput_encoding_error_handlerstrictoutput_encodingutf-8output_encoding_error_handlerjerror_encodingutf-8error_encoding_error_handlerbackslashreplace language_codeenrecord_dependenciesNconfigN id_prefixhauto_id_prefixid dump_settingsNdump_internalsNdump_transformsNdump_pseudo_xmlNexpose_internalsNstrict_visitorN_disable_configN_sourceh _destinationN _config_files]7/var/lib/git/docbuild/linux/Documentation/docutils.confafile_insertion_enabled raw_enabledKline_length_limitM'pep_referencesN pep_base_urlhttps://peps.python.org/pep_file_url_templatepep-%04drfc_referencesN rfc_base_url&https://datatracker.ietf.org/doc/html/ tab_widthKtrim_footnote_reference_spacesyntax_highlightlong smart_quotessmartquotes_locales]character_level_inline_markupdoctitle_xform docinfo_xformKsectsubtitle_xform image_loadinglinkembed_stylesheetcloak_email_addressessection_self_linkenvNubreporterNindirect_targets]substitution_defs}(hhhhhhj jjjj*jj9j-jHj<jWjKjfjZjujijjxjjjjjjjjjjjjjjjjj jjjj)jj8j,jGj;jVjJjejYjtjhjjwjjjjjjjjjjjjjjjjj jjj j(jj7j+jFj:jUjIjdjXjsjgjjvjjjjjjjjjjjjjjjjj jjj j'jj6j*jEj9jTjHjcjWjrjfjjujjjjjjjjjjjjjjjjjjjj j&jj5j)jDj8usubstitution_names}(amphߌaposhasthbrvbarj bsoljcentj*colonj9commajHcommatjWcopyjfcurrenjudarrjdegjdividejdollarjequalsjexcljfrac12jfrac14jfrac18jfrac34j frac38jfrac58j)frac78j8gtjGhalfjVhorbarjehyphenjtiexcljiquestjlaquojlarrjlcubjldquojlowbarjlparjlsqbjlsquoj ltjmicroj(middotj7nbspjFnotjUnumjdohmjsordfjordmjparajpercntjperiodjplusjplusmnjpoundjquestjquotj raquojrarrj'rcubj6rdquojEregjTrparjcrsqbjrrsquojsectjsemijshyjsoljsungjsup1jsup2jsup3jtimesjtradejuarrj&verbarj5yenjDurefnames}refids}nameids}(jjjjjjjju nametypes}(jjjjuh}(jjIjjjjjju footnote_refs} citation_refs} autofootnotes]autofootnote_refs]symbol_footnotes]symbol_footnote_refs] footnotes] citations]autofootnote_startKsymbol_footnote_startK id_counter collectionsCounter}Rparse_messages]hsystem_message)}(hhh]jh)}(h:Enumerated list start value not ordinal-1: "C" (ordinal 3)h]h>Enumerated list start value not ordinal-1: “C” (ordinal 3)}(hjqhhhNhNubah}(h]h ]h"]h$]h&]uh1jghjnubah}(h]h ]h"]h$]h&]levelKtypeINFOsourcehlineKuh1jlhjIhhhhhKubatransform_messages] transformerN include_log]%Documentation/misc-devices/c2port.rst(NNNNta decorationNhhub.