summaryrefslogtreecommitdiff
path: root/olsndot
diff options
context:
space:
mode:
Diffstat (limited to 'olsndot')
-rw-r--r--olsndot/firmware/LICENSE661
-rw-r--r--olsndot/firmware/main.c387
2 files changed, 901 insertions, 147 deletions
diff --git a/olsndot/firmware/LICENSE b/olsndot/firmware/LICENSE
new file mode 100644
index 0000000..be3f7b2
--- /dev/null
+++ b/olsndot/firmware/LICENSE
@@ -0,0 +1,661 @@
+ GNU AFFERO GENERAL PUBLIC LICENSE
+ Version 3, 19 November 2007
+
+ Copyright (C) 2007 Free Software Foundation, Inc. <https://fsf.org/>
+ Everyone is permitted to copy and distribute verbatim copies
+ of this license document, but changing it is not allowed.
+
+ Preamble
+
+ The GNU Affero General Public License is a free, copyleft license for
+software and other kinds of works, specifically designed to ensure
+cooperation with the community in the case of network server software.
+
+ The licenses for most software and other practical works are designed
+to take away your freedom to share and change the works. By contrast,
+our General Public Licenses are intended to guarantee your freedom to
+share and change all versions of a program--to make sure it remains free
+software for all its users.
+
+ When we speak of free software, we are referring to freedom, not
+price. Our General Public Licenses are designed to make sure that you
+have the freedom to distribute copies of free software (and charge for
+them if you wish), that you receive source code or can get it if you
+want it, that you can change the software or use pieces of it in new
+free programs, and that you know you can do these things.
+
+ Developers that use our General Public Licenses protect your rights
+with two steps: (1) assert copyright on the software, and (2) offer
+you this License which gives you legal permission to copy, distribute
+and/or modify the software.
+
+ A secondary benefit of defending all users' freedom is that
+improvements made in alternate versions of the program, if they
+receive widespread use, become available for other developers to
+incorporate. Many developers of free software are heartened and
+encouraged by the resulting cooperation. However, in the case of
+software used on network servers, this result may fail to come about.
+The GNU General Public License permits making a modified version and
+letting the public access it on a server without ever releasing its
+source code to the public.
+
+ The GNU Affero General Public License is designed specifically to
+ensure that, in such cases, the modified source code becomes available
+to the community. It requires the operator of a network server to
+provide the source code of the modified version running there to the
+users of that server. Therefore, public use of a modified version, on
+a publicly accessible server, gives the public access to the source
+code of the modified version.
+
+ An older license, called the Affero General Public License and
+published by Affero, was designed to accomplish similar goals. This is
+a different license, not a version of the Affero GPL, but Affero has
+released a new version of the Affero GPL which permits relicensing under
+this license.
+
+ The precise terms and conditions for copying, distribution and
+modification follow.
+
+ TERMS AND CONDITIONS
+
+ 0. Definitions.
+
+ "This License" refers to version 3 of the GNU Affero General Public License.
+
+ "Copyright" also means copyright-like laws that apply to other kinds of
+works, such as semiconductor masks.
+
+ "The Program" refers to any copyrightable work licensed under this
+License. Each licensee is addressed as "you". "Licensees" and
+"recipients" may be individuals or organizations.
+
+ To "modify" a work means to copy from or adapt all or part of the work
+in a fashion requiring copyright permission, other than the making of an
+exact copy. The resulting work is called a "modified version" of the
+earlier work or a work "based on" the earlier work.
+
+ A "covered work" means either the unmodified Program or a work based
+on the Program.
+
+ To "propagate" a work means to do anything with it that, without
+permission, would make you directly or secondarily liable for
+infringement under applicable copyright law, except executing it on a
+computer or modifying a private copy. Propagation includes copying,
+distribution (with or without modification), making available to the
+public, and in some countries other activities as well.
+
+ To "convey" a work means any kind of propagation that enables other
+parties to make or receive copies. Mere interaction with a user through
+a computer network, with no transfer of a copy, is not conveying.
+
+ An interactive user interface displays "Appropriate Legal Notices"
+to the extent that it includes a convenient and prominently visible
+feature that (1) displays an appropriate copyright notice, and (2)
+tells the user that there is no warranty for the work (except to the
+extent that warranties are provided), that licensees may convey the
+work under this License, and how to view a copy of this License. If
+the interface presents a list of user commands or options, such as a
+menu, a prominent item in the list meets this criterion.
+
+ 1. Source Code.
+
+ The "source code" for a work means the preferred form of the work
+for making modifications to it. "Object code" means any non-source
+form of a work.
+
+ A "Standard Interface" means an interface that either is an official
+standard defined by a recognized standards body, or, in the case of
+interfaces specified for a particular programming language, one that
+is widely used among developers working in that language.
+
+ The "System Libraries" of an executable work include anything, other
+than the work as a whole, that (a) is included in the normal form of
+packaging a Major Component, but which is not part of that Major
+Component, and (b) serves only to enable use of the work with that
+Major Component, or to implement a Standard Interface for which an
+implementation is available to the public in source code form. A
+"Major Component", in this context, means a major essential component
+(kernel, window system, and so on) of the specific operating system
+(if any) on which the executable work runs, or a compiler used to
+produce the work, or an object code interpreter used to run it.
+
+ The "Corresponding Source" for a work in object code form means all
+the source code needed to generate, install, and (for an executable
+work) run the object code and to modify the work, including scripts to
+control those activities. However, it does not include the work's
+System Libraries, or general-purpose tools or generally available free
+programs which are used unmodified in performing those activities but
+which are not part of the work. For example, Corresponding Source
+includes interface definition files associated with source files for
+the work, and the source code for shared libraries and dynamically
+linked subprograms that the work is specifically designed to require,
+such as by intimate data communication or control flow between those
+subprograms and other parts of the work.
+
+ The Corresponding Source need not include anything that users
+can regenerate automatically from other parts of the Corresponding
+Source.
+
+ The Corresponding Source for a work in source code form is that
+same work.
+
+ 2. Basic Permissions.
+
+ All rights granted under this License are granted for the term of
+copyright on the Program, and are irrevocable provided the stated
+conditions are met. This License explicitly affirms your unlimited
+permission to run the unmodified Program. The output from running a
+covered work is covered by this License only if the output, given its
+content, constitutes a covered work. This License acknowledges your
+rights of fair use or other equivalent, as provided by copyright law.
+
+ You may make, run and propagate covered works that you do not
+convey, without conditions so long as your license otherwise remains
+in force. You may convey covered works to others for the sole purpose
+of having them make modifications exclusively for you, or provide you
+with facilities for running those works, provided that you comply with
+the terms of this License in conveying all material for which you do
+not control copyright. Those thus making or running the covered works
+for you must do so exclusively on your behalf, under your direction
+and control, on terms that prohibit them from making any copies of
+your copyrighted material outside their relationship with you.
+
+ Conveying under any other circumstances is permitted solely under
+the conditions stated below. Sublicensing is not allowed; section 10
+makes it unnecessary.
+
+ 3. Protecting Users' Legal Rights From Anti-Circumvention Law.
+
+ No covered work shall be deemed part of an effective technological
+measure under any applicable law fulfilling obligations under article
+11 of the WIPO copyright treaty adopted on 20 December 1996, or
+similar laws prohibiting or restricting circumvention of such
+measures.
+
+ When you convey a covered work, you waive any legal power to forbid
+circumvention of technological measures to the extent such circumvention
+is effected by exercising rights under this License with respect to
+the covered work, and you disclaim any intention to limit operation or
+modification of the work as a means of enforcing, against the work's
+users, your or third parties' legal rights to forbid circumvention of
+technological measures.
+
+ 4. Conveying Verbatim Copies.
+
+ You may convey verbatim copies of the Program's source code as you
+receive it, in any medium, provided that you conspicuously and
+appropriately publish on each copy an appropriate copyright notice;
+keep intact all notices stating that this License and any
+non-permissive terms added in accord with section 7 apply to the code;
+keep intact all notices of the absence of any warranty; and give all
+recipients a copy of this License along with the Program.
+
+ You may charge any price or no price for each copy that you convey,
+and you may offer support or warranty protection for a fee.
+
+ 5. Conveying Modified Source Versions.
+
+ You may convey a work based on the Program, or the modifications to
+produce it from the Program, in the form of source code under the
+terms of section 4, provided that you also meet all of these conditions:
+
+ a) The work must carry prominent notices stating that you modified
+ it, and giving a relevant date.
+
+ b) The work must carry prominent notices stating that it is
+ released under this License and any conditions added under section
+ 7. This requirement modifies the requirement in section 4 to
+ "keep intact all notices".
+
+ c) You must license the entire work, as a whole, under this
+ License to anyone who comes into possession of a copy. This
+ License will therefore apply, along with any applicable section 7
+ additional terms, to the whole of the work, and all its parts,
+ regardless of how they are packaged. This License gives no
+ permission to license the work in any other way, but it does not
+ invalidate such permission if you have separately received it.
+
+ d) If the work has interactive user interfaces, each must display
+ Appropriate Legal Notices; however, if the Program has interactive
+ interfaces that do not display Appropriate Legal Notices, your
+ work need not make them do so.
+
+ A compilation of a covered work with other separate and independent
+works, which are not by their nature extensions of the covered work,
+and which are not combined with it such as to form a larger program,
+in or on a volume of a storage or distribution medium, is called an
+"aggregate" if the compilation and its resulting copyright are not
+used to limit the access or legal rights of the compilation's users
+beyond what the individual works permit. Inclusion of a covered work
+in an aggregate does not cause this License to apply to the other
+parts of the aggregate.
+
+ 6. Conveying Non-Source Forms.
+
+ You may convey a covered work in object code form under the terms
+of sections 4 and 5, provided that you also convey the
+machine-readable Corresponding Source under the terms of this License,
+in one of these ways:
+
+ a) Convey the object code in, or embodied in, a physical product
+ (including a physical distribution medium), accompanied by the
+ Corresponding Source fixed on a durable physical medium
+ customarily used for software interchange.
+
+ b) Convey the object code in, or embodied in, a physical product
+ (including a physical distribution medium), accompanied by a
+ written offer, valid for at least three years and valid for as
+ long as you offer spare parts or customer support for that product
+ model, to give anyone who possesses the object code either (1) a
+ copy of the Corresponding Source for all the software in the
+ product that is covered by this License, on a durable physical
+ medium customarily used for software interchange, for a price no
+ more than your reasonable cost of physically performing this
+ conveying of source, or (2) access to copy the
+ Corresponding Source from a network server at no charge.
+
+ c) Convey individual copies of the object code with a copy of the
+ written offer to provide the Corresponding Source. This
+ alternative is allowed only occasionally and noncommercially, and
+ only if you received the object code with such an offer, in accord
+ with subsection 6b.
+
+ d) Convey the object code by offering access from a designated
+ place (gratis or for a charge), and offer equivalent access to the
+ Corresponding Source in the same way through the same place at no
+ further charge. You need not require recipients to copy the
+ Corresponding Source along with the object code. If the place to
+ copy the object code is a network server, the Corresponding Source
+ may be on a different server (operated by you or a third party)
+ that supports equivalent copying facilities, provided you maintain
+ clear directions next to the object code saying where to find the
+ Corresponding Source. Regardless of what server hosts the
+ Corresponding Source, you remain obligated to ensure that it is
+ available for as long as needed to satisfy these requirements.
+
+ e) Convey the object code using peer-to-peer transmission, provided
+ you inform other peers where the object code and Corresponding
+ Source of the work are being offered to the general public at no
+ charge under subsection 6d.
+
+ A separable portion of the object code, whose source code is excluded
+from the Corresponding Source as a System Library, need not be
+included in conveying the object code work.
+
+ A "User Product" is either (1) a "consumer product", which means any
+tangible personal property which is normally used for personal, family,
+or household purposes, or (2) anything designed or sold for incorporation
+into a dwelling. In determining whether a product is a consumer product,
+doubtful cases shall be resolved in favor of coverage. For a particular
+product received by a particular user, "normally used" refers to a
+typical or common use of that class of product, regardless of the status
+of the particular user or of the way in which the particular user
+actually uses, or expects or is expected to use, the product. A product
+is a consumer product regardless of whether the product has substantial
+commercial, industrial or non-consumer uses, unless such uses represent
+the only significant mode of use of the product.
+
+ "Installation Information" for a User Product means any methods,
+procedures, authorization keys, or other information required to install
+and execute modified versions of a covered work in that User Product from
+a modified version of its Corresponding Source. The information must
+suffice to ensure that the continued functioning of the modified object
+code is in no case prevented or interfered with solely because
+modification has been made.
+
+ If you convey an object code work under this section in, or with, or
+specifically for use in, a User Product, and the conveying occurs as
+part of a transaction in which the right of possession and use of the
+User Product is transferred to the recipient in perpetuity or for a
+fixed term (regardless of how the transaction is characterized), the
+Corresponding Source conveyed under this section must be accompanied
+by the Installation Information. But this requirement does not apply
+if neither you nor any third party retains the ability to install
+modified object code on the User Product (for example, the work has
+been installed in ROM).
+
+ The requirement to provide Installation Information does not include a
+requirement to continue to provide support service, warranty, or updates
+for a work that has been modified or installed by the recipient, or for
+the User Product in which it has been modified or installed. Access to a
+network may be denied when the modification itself materially and
+adversely affects the operation of the network or violates the rules and
+protocols for communication across the network.
+
+ Corresponding Source conveyed, and Installation Information provided,
+in accord with this section must be in a format that is publicly
+documented (and with an implementation available to the public in
+source code form), and must require no special password or key for
+unpacking, reading or copying.
+
+ 7. Additional Terms.
+
+ "Additional permissions" are terms that supplement the terms of this
+License by making exceptions from one or more of its conditions.
+Additional permissions that are applicable to the entire Program shall
+be treated as though they were included in this License, to the extent
+that they are valid under applicable law. If additional permissions
+apply only to part of the Program, that part may be used separately
+under those permissions, but the entire Program remains governed by
+this License without regard to the additional permissions.
+
+ When you convey a copy of a covered work, you may at your option
+remove any additional permissions from that copy, or from any part of
+it. (Additional permissions may be written to require their own
+removal in certain cases when you modify the work.) You may place
+additional permissions on material, added by you to a covered work,
+for which you have or can give appropriate copyright permission.
+
+ Notwithstanding any other provision of this License, for material you
+add to a covered work, you may (if authorized by the copyright holders of
+that material) supplement the terms of this License with terms:
+
+ a) Disclaiming warranty or limiting liability differently from the
+ terms of sections 15 and 16 of this License; or
+
+ b) Requiring preservation of specified reasonable legal notices or
+ author attributions in that material or in the Appropriate Legal
+ Notices displayed by works containing it; or
+
+ c) Prohibiting misrepresentation of the origin of that material, or
+ requiring that modified versions of such material be marked in
+ reasonable ways as different from the original version; or
+
+ d) Limiting the use for publicity purposes of names of licensors or
+ authors of the material; or
+
+ e) Declining to grant rights under trademark law for use of some
+ trade names, trademarks, or service marks; or
+
+ f) Requiring indemnification of licensors and authors of that
+ material by anyone who conveys the material (or modified versions of
+ it) with contractual assumptions of liability to the recipient, for
+ any liability that these contractual assumptions directly impose on
+ those licensors and authors.
+
+ All other non-permissive additional terms are considered "further
+restrictions" within the meaning of section 10. If the Program as you
+received it, or any part of it, contains a notice stating that it is
+governed by this License along with a term that is a further
+restriction, you may remove that term. If a license document contains
+a further restriction but permits relicensing or conveying under this
+License, you may add to a covered work material governed by the terms
+of that license document, provided that the further restriction does
+not survive such relicensing or conveying.
+
+ If you add terms to a covered work in accord with this section, you
+must place, in the relevant source files, a statement of the
+additional terms that apply to those files, or a notice indicating
+where to find the applicable terms.
+
+ Additional terms, permissive or non-permissive, may be stated in the
+form of a separately written license, or stated as exceptions;
+the above requirements apply either way.
+
+ 8. Termination.
+
+ You may not propagate or modify a covered work except as expressly
+provided under this License. Any attempt otherwise to propagate or
+modify it is void, and will automatically terminate your rights under
+this License (including any patent licenses granted under the third
+paragraph of section 11).
+
+ However, if you cease all violation of this License, then your
+license from a particular copyright holder is reinstated (a)
+provisionally, unless and until the copyright holder explicitly and
+finally terminates your license, and (b) permanently, if the copyright
+holder fails to notify you of the violation by some reasonable means
+prior to 60 days after the cessation.
+
+ Moreover, your license from a particular copyright holder is
+reinstated permanently if the copyright holder notifies you of the
+violation by some reasonable means, this is the first time you have
+received notice of violation of this License (for any work) from that
+copyright holder, and you cure the violation prior to 30 days after
+your receipt of the notice.
+
+ Termination of your rights under this section does not terminate the
+licenses of parties who have received copies or rights from you under
+this License. If your rights have been terminated and not permanently
+reinstated, you do not qualify to receive new licenses for the same
+material under section 10.
+
+ 9. Acceptance Not Required for Having Copies.
+
+ You are not required to accept this License in order to receive or
+run a copy of the Program. Ancillary propagation of a covered work
+occurring solely as a consequence of using peer-to-peer transmission
+to receive a copy likewise does not require acceptance. However,
+nothing other than this License grants you permission to propagate or
+modify any covered work. These actions infringe copyright if you do
+not accept this License. Therefore, by modifying or propagating a
+covered work, you indicate your acceptance of this License to do so.
+
+ 10. Automatic Licensing of Downstream Recipients.
+
+ Each time you convey a covered work, the recipient automatically
+receives a license from the original licensors, to run, modify and
+propagate that work, subject to this License. You are not responsible
+for enforcing compliance by third parties with this License.
+
+ An "entity transaction" is a transaction transferring control of an
+organization, or substantially all assets of one, or subdividing an
+organization, or merging organizations. If propagation of a covered
+work results from an entity transaction, each party to that
+transaction who receives a copy of the work also receives whatever
+licenses to the work the party's predecessor in interest had or could
+give under the previous paragraph, plus a right to possession of the
+Corresponding Source of the work from the predecessor in interest, if
+the predecessor has it or can get it with reasonable efforts.
+
+ You may not impose any further restrictions on the exercise of the
+rights granted or affirmed under this License. For example, you may
+not impose a license fee, royalty, or other charge for exercise of
+rights granted under this License, and you may not initiate litigation
+(including a cross-claim or counterclaim in a lawsuit) alleging that
+any patent claim is infringed by making, using, selling, offering for
+sale, or importing the Program or any portion of it.
+
+ 11. Patents.
+
+ A "contributor" is a copyright holder who authorizes use under this
+License of the Program or a work on which the Program is based. The
+work thus licensed is called the contributor's "contributor version".
+
+ A contributor's "essential patent claims" are all patent claims
+owned or controlled by the contributor, whether already acquired or
+hereafter acquired, that would be infringed by some manner, permitted
+by this License, of making, using, or selling its contributor version,
+but do not include claims that would be infringed only as a
+consequence of further modification of the contributor version. For
+purposes of this definition, "control" includes the right to grant
+patent sublicenses in a manner consistent with the requirements of
+this License.
+
+ Each contributor grants you a non-exclusive, worldwide, royalty-free
+patent license under the contributor's essential patent claims, to
+make, use, sell, offer for sale, import and otherwise run, modify and
+propagate the contents of its contributor version.
+
+ In the following three paragraphs, a "patent license" is any express
+agreement or commitment, however denominated, not to enforce a patent
+(such as an express permission to practice a patent or covenant not to
+sue for patent infringement). To "grant" such a patent license to a
+party means to make such an agreement or commitment not to enforce a
+patent against the party.
+
+ If you convey a covered work, knowingly relying on a patent license,
+and the Corresponding Source of the work is not available for anyone
+to copy, free of charge and under the terms of this License, through a
+publicly available network server or other readily accessible means,
+then you must either (1) cause the Corresponding Source to be so
+available, or (2) arrange to deprive yourself of the benefit of the
+patent license for this particular work, or (3) arrange, in a manner
+consistent with the requirements of this License, to extend the patent
+license to downstream recipients. "Knowingly relying" means you have
+actual knowledge that, but for the patent license, your conveying the
+covered work in a country, or your recipient's use of the covered work
+in a country, would infringe one or more identifiable patents in that
+country that you have reason to believe are valid.
+
+ If, pursuant to or in connection with a single transaction or
+arrangement, you convey, or propagate by procuring conveyance of, a
+covered work, and grant a patent license to some of the parties
+receiving the covered work authorizing them to use, propagate, modify
+or convey a specific copy of the covered work, then the patent license
+you grant is automatically extended to all recipients of the covered
+work and works based on it.
+
+ A patent license is "discriminatory" if it does not include within
+the scope of its coverage, prohibits the exercise of, or is
+conditioned on the non-exercise of one or more of the rights that are
+specifically granted under this License. You may not convey a covered
+work if you are a party to an arrangement with a third party that is
+in the business of distributing software, under which you make payment
+to the third party based on the extent of your activity of conveying
+the work, and under which the third party grants, to any of the
+parties who would receive the covered work from you, a discriminatory
+patent license (a) in connection with copies of the covered work
+conveyed by you (or copies made from those copies), or (b) primarily
+for and in connection with specific products or compilations that
+contain the covered work, unless you entered into that arrangement,
+or that patent license was granted, prior to 28 March 2007.
+
+ Nothing in this License shall be construed as excluding or limiting
+any implied license or other defenses to infringement that may
+otherwise be available to you under applicable patent law.
+
+ 12. No Surrender of Others' Freedom.
+
+ If conditions are imposed on you (whether by court order, agreement or
+otherwise) that contradict the conditions of this License, they do not
+excuse you from the conditions of this License. If you cannot convey a
+covered work so as to satisfy simultaneously your obligations under this
+License and any other pertinent obligations, then as a consequence you may
+not convey it at all. For example, if you agree to terms that obligate you
+to collect a royalty for further conveying from those to whom you convey
+the Program, the only way you could satisfy both those terms and this
+License would be to refrain entirely from conveying the Program.
+
+ 13. Remote Network Interaction; Use with the GNU General Public License.
+
+ Notwithstanding any other provision of this License, if you modify the
+Program, your modified version must prominently offer all users
+interacting with it remotely through a computer network (if your version
+supports such interaction) an opportunity to receive the Corresponding
+Source of your version by providing access to the Corresponding Source
+from a network server at no charge, through some standard or customary
+means of facilitating copying of software. This Corresponding Source
+shall include the Corresponding Source for any work covered by version 3
+of the GNU General Public License that is incorporated pursuant to the
+following paragraph.
+
+ Notwithstanding any other provision of this License, you have
+permission to link or combine any covered work with a work licensed
+under version 3 of the GNU General Public License into a single
+combined work, and to convey the resulting work. The terms of this
+License will continue to apply to the part which is the covered work,
+but the work with which it is combined will remain governed by version
+3 of the GNU General Public License.
+
+ 14. Revised Versions of this License.
+
+ The Free Software Foundation may publish revised and/or new versions of
+the GNU Affero General Public License from time to time. Such new versions
+will be similar in spirit to the present version, but may differ in detail to
+address new problems or concerns.
+
+ Each version is given a distinguishing version number. If the
+Program specifies that a certain numbered version of the GNU Affero General
+Public License "or any later version" applies to it, you have the
+option of following the terms and conditions either of that numbered
+version or of any later version published by the Free Software
+Foundation. If the Program does not specify a version number of the
+GNU Affero General Public License, you may choose any version ever published
+by the Free Software Foundation.
+
+ If the Program specifies that a proxy can decide which future
+versions of the GNU Affero General Public License can be used, that proxy's
+public statement of acceptance of a version permanently authorizes you
+to choose that version for the Program.
+
+ Later license versions may give you additional or different
+permissions. However, no additional obligations are imposed on any
+author or copyright holder as a result of your choosing to follow a
+later version.
+
+ 15. Disclaimer of Warranty.
+
+ THERE IS NO WARRANTY FOR THE PROGRAM, TO THE EXTENT PERMITTED BY
+APPLICABLE LAW. EXCEPT WHEN OTHERWISE STATED IN WRITING THE COPYRIGHT
+HOLDERS AND/OR OTHER PARTIES PROVIDE THE PROGRAM "AS IS" WITHOUT WARRANTY
+OF ANY KIND, EITHER EXPRESSED OR IMPLIED, INCLUDING, BUT NOT LIMITED TO,
+THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
+PURPOSE. THE ENTIRE RISK AS TO THE QUALITY AND PERFORMANCE OF THE PROGRAM
+IS WITH YOU. SHOULD THE PROGRAM PROVE DEFECTIVE, YOU ASSUME THE COST OF
+ALL NECESSARY SERVICING, REPAIR OR CORRECTION.
+
+ 16. Limitation of Liability.
+
+ IN NO EVENT UNLESS REQUIRED BY APPLICABLE LAW OR AGREED TO IN WRITING
+WILL ANY COPYRIGHT HOLDER, OR ANY OTHER PARTY WHO MODIFIES AND/OR CONVEYS
+THE PROGRAM AS PERMITTED ABOVE, BE LIABLE TO YOU FOR DAMAGES, INCLUDING ANY
+GENERAL, SPECIAL, INCIDENTAL OR CONSEQUENTIAL DAMAGES ARISING OUT OF THE
+USE OR INABILITY TO USE THE PROGRAM (INCLUDING BUT NOT LIMITED TO LOSS OF
+DATA OR DATA BEING RENDERED INACCURATE OR LOSSES SUSTAINED BY YOU OR THIRD
+PARTIES OR A FAILURE OF THE PROGRAM TO OPERATE WITH ANY OTHER PROGRAMS),
+EVEN IF SUCH HOLDER OR OTHER PARTY HAS BEEN ADVISED OF THE POSSIBILITY OF
+SUCH DAMAGES.
+
+ 17. Interpretation of Sections 15 and 16.
+
+ If the disclaimer of warranty and limitation of liability provided
+above cannot be given local legal effect according to their terms,
+reviewing courts shall apply local law that most closely approximates
+an absolute waiver of all civil liability in connection with the
+Program, unless a warranty or assumption of liability accompanies a
+copy of the Program in return for a fee.
+
+ END OF TERMS AND CONDITIONS
+
+ How to Apply These Terms to Your New Programs
+
+ If you develop a new program, and you want it to be of the greatest
+possible use to the public, the best way to achieve this is to make it
+free software which everyone can redistribute and change under these terms.
+
+ To do so, attach the following notices to the program. It is safest
+to attach them to the start of each source file to most effectively
+state the exclusion of warranty; and each file should have at least
+the "copyright" line and a pointer to where the full notice is found.
+
+ <one line to give the program's name and a brief idea of what it does.>
+ Copyright (C) <year> <name of author>
+
+ This program is free software: you can redistribute it and/or modify
+ it under the terms of the GNU Affero General Public License as published by
+ the Free Software Foundation, either version 3 of the License, or
+ (at your option) any later version.
+
+ This 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 Affero General Public License for more details.
+
+ You should have received a copy of the GNU Affero General Public License
+ along with this program. If not, see <https://www.gnu.org/licenses/>.
+
+Also add information on how to contact you by electronic and paper mail.
+
+ If your software can interact with users remotely through a computer
+network, you should also make sure that it provides a way for users to
+get its source. For example, if your program is a web application, its
+interface could display a "Source" link that leads users to an archive
+of the code. There are many ways you could offer source, and different
+solutions will be better for different programs; see section 13 for the
+specific requirements.
+
+ You should also get your employer (if you work as a programmer) or school,
+if any, to sign a "copyright disclaimer" for the program, if necessary.
+For more information on this, and how to apply and follow the GNU AGPL, see
+<https://www.gnu.org/licenses/>.
diff --git a/olsndot/firmware/main.c b/olsndot/firmware/main.c
index 5d6c2be..a7cbbef 100644
--- a/olsndot/firmware/main.c
+++ b/olsndot/firmware/main.c
@@ -1,82 +1,83 @@
+/* OpenStep 2
+ * Copyright (C) 2017 Sebastian Götte <code@jaseg.net>
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Affero General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This 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 Affero General Public License for more details.
+ *
+ * You should have received a copy of the GNU Affero General Public License
+ * along with this program. If not, see <https://www.gnu.org/licenses/>.
+ */
+
+/* Preliminary remarks.
+ *
+ * This code is intended to run on an ARM Cortex-M0 microcontroller made by ST, part number STM32F030F4C6
+ *
+ * Some terminology:
+ *
+ * * The term "raw channel" refers to a single output of the 32 outputs provided by the driver board. It corresponds to
+ * a single color sub-channel of one RGBW output. One RGBW output consists of four raw channels.
+ *
+ * * The term "logical channel" refers to one RGBW output of four individual colors handled by a group of four raw
+ * channels.
+ */
#include <stm32f0xx.h>
#include <stdint.h>
#include <system_stm32f0xx.h>
#include <stm32f0xx_ll_utils.h>
#include <math.h>
-/*
- * Part number: STM32F030F4C6
+
+/* Bit count of this device. Note that to change this you will also have to adapt the per-bit timer period lookup table
+ * below.
*/
+#define NBITS 14
-#define NBITS 12
-void do_transpose(void);
-uint32_t brightness[32];
-uint32_t sys_time = 0;
-uint32_t sys_time_seconds = 0;
-volatile uint32_t brightness_by_bit[NBITS];
+/* Maximum bit count supported by serial command protocol. The brightness data is assumed to be of this bit width, but
+ * only the uppermost NBITS bits are used. */
+#define MAX_BITS 16
-unsigned int stk_start(void) {
- return SysTick->VAL;
-}
+void do_transpose(void);
-unsigned int stk_end(unsigned int start) {
- return (start - SysTick->VAL) & 0xffffff;
-}
+/* Right-aligned integer raw channel brightness values like so:
+ *
+ * bit index 31 ... 16 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0
+ * | (MSB) serial data put *here* (LSB) |
+ * |<-utterly ignored->| |<-----------------MAX_BITS------------------>|
+ * |<----------------NBITS---------------->| |<>|--ignored
+ * | (MSB) brightness data (LSB) | |<>|--ignored
+ */
+uint32_t brightness[32] = { 0 };
-unsigned int stk_microseconds(void) {
- return sys_time*1000 + (1000 - (SysTick->VAL / (SystemCoreClock/1000000)));
-}
+/* Bit-golfed modulation data generated from the above values by the main loop, ready to be sent out to the shift
+ * registers.
+ */
+volatile uint32_t brightness_by_bit[NBITS] = { 0 };
-void hsv_set(int idx, int hue, int white) {
- int i = hue>>NBITS;
- int j = hue & (~(-1<<NBITS));
- int r=0, g=0, b=0;
- switch (i) {
- case 0:
- r = (1<<NBITS)-1;
- g = 0;
- b = j;
- break;
- case 1:
- r = (1<<NBITS)-1-j;
- g = 0;
- b = (1<<NBITS)-1;
- break;
- case 2:
- r = 0;
- g = j;
- b = (1<<NBITS)-1;
- break;
- case 3:
- r = 0;
- g = (1<<NBITS)-1;
- b = (1<<NBITS)-1-j;
- break;
- case 4:
- r = j;
- g = (1<<NBITS)-1;
- b = 0;
- break;
- case 5:
- r = (1<<NBITS)-1;
- g = (1<<NBITS)-1-j;
- b = 0;
- break;
- }
- brightness[idx*4 + 0] = white;
- brightness[idx*4 + 1] = r;
- brightness[idx*4 + 2] = g;
- brightness[idx*4 + 3] = b;
-}
+/* Global systick timing variables */
+uint32_t sys_time = 0;
+uint32_t sys_time_seconds = 0;
-int hue;
int main(void) {
+ /* Get all the good clocks and PLLs on this thing up and running. We're running from an external 16MHz crystal,
+ * which we're first dividing down by 2 to get 8MHz, then PLL'ing up by 4 to get 32MHz as our main system clock.
+ *
+ * The busses are all run directly from these 32MHz because why not.
+ *
+ * Be careful in mucking around with this code since you can kind of semi-brick the chip if you do it wrong.
+ */
RCC->CR |= RCC_CR_HSEON;
while (!(RCC->CR&RCC_CR_HSERDY));
RCC->CFGR &= ~RCC_CFGR_PLLMUL_Msk & ~RCC_CFGR_SW_Msk & ~RCC_CFGR_PPRE_Msk & ~RCC_CFGR_HPRE_Msk;
- RCC->CFGR |= (2<<RCC_CFGR_PLLMUL_Pos) | RCC_CFGR_PLLSRC_HSE_PREDIV; /* PLL x4 -> 50.0MHz */
+ RCC->CFGR |= (2<<RCC_CFGR_PLLMUL_Pos) | RCC_CFGR_PLLSRC_HSE_PREDIV; /* PLL x4 -> 32.0MHz */
RCC->CFGR2 &= ~RCC_CFGR2_PREDIV_Msk;
- RCC->CFGR2 |= RCC_CFGR2_PREDIV_DIV2; /* prediv :2 -> 12.5MHz */
+ RCC->CFGR2 |= RCC_CFGR2_PREDIV_DIV2; /* prediv :2 -> 8.0MHz */
RCC->CR |= RCC_CR_PLLON;
while (!(RCC->CR&RCC_CR_PLLRDY));
RCC->CFGR |= (2<<RCC_CFGR_SW_Pos);
@@ -84,10 +85,12 @@ int main(void) {
SysTick_Config(SystemCoreClock/1000); /* 1ms interval */
+ /* Enable all the periphery we need */
RCC->AHBENR |= RCC_AHBENR_GPIOAEN | RCC_AHBENR_GPIOBEN;
RCC->APB2ENR |= RCC_APB2ENR_SPI1EN | RCC_APB2ENR_TIM1EN | RCC_APB2ENR_USART1EN | RCC_APB2ENR_ADCEN;
RCC->APB1ENR |= RCC_APB1ENR_TIM3EN;
+ /* Configure all the GPIOs */
GPIOA->MODER |=
(3<<GPIO_MODER_MODER0_Pos) /* PA0 - Current measurement analog input */
| (1<<GPIO_MODER_MODER1_Pos) /* PA1 - RS485 TX enable */
@@ -114,6 +117,7 @@ int main(void) {
GPIOB->OSPEEDR |=
(3<<GPIO_OSPEEDR_OSPEEDR1_Pos); /* Clear */
+ /* Alternate function settings */
GPIOA->AFR[0] |=
(1<<GPIO_AFRL_AFRL2_Pos) /* USART1_TX */
| (1<<GPIO_AFRL_AFRL3_Pos) /* USART1_RX */
@@ -125,35 +129,42 @@ int main(void) {
(2<<GPIO_AFRL_AFRL1_Pos); /* TIM1_CH3N */
/* Configure SPI controller */
- /* CPOL=0, CPHA=0, prescaler=8 -> 1MBd */
+ /* CPOL=0, CPHA=0, prescaler=2 -> 16MBd */
SPI1->CR1 = SPI_CR1_BIDIMODE | SPI_CR1_BIDIOE | SPI_CR1_SSM | SPI_CR1_SSI | SPI_CR1_SPE | (0<<SPI_CR1_BR_Pos) | SPI_CR1_MSTR;
SPI1->CR2 = (0xf<<SPI_CR2_DS_Pos);
/* Configure TIM1 for display strobe generation */
- TIM1->CR1 = TIM_CR1_ARPE; // | TIM_CR1_OPM; // | TIM_CR1_URS;
+ TIM1->CR1 = TIM_CR1_ARPE;
- TIM1->PSC = 1; // debug
+ TIM1->PSC = 1; /* Prescale by 2, resulting in a 16MHz timer frequency and 62.5ns timer step size. */
/* CH2 - clear/!MR, CH3 - strobe/STCP */
- TIM1->CCMR2 = (6<<TIM_CCMR2_OC3M_Pos); // | TIM_CCMR2_OC3PE;
+ TIM1->CCMR2 = (6<<TIM_CCMR2_OC3M_Pos) | TIM_CCMR2_OC3PE;
TIM1->CCER |= TIM_CCER_CC3E | TIM_CCER_CC3NE | TIM_CCER_CC3P | TIM_CCER_CC3NP;
- TIM1->BDTR = TIM_BDTR_MOE | (8<<TIM_BDTR_DTG_Pos); /* 1us dead time */
- TIM1->DIER = TIM_DIER_UIE;
+ TIM1->BDTR = TIM_BDTR_MOE | (1<<TIM_BDTR_DTG_Pos); /* really short dead time */
+ TIM1->DIER = TIM_DIER_UIE; /* Enable update (overrun) interrupt */
TIM1->ARR = 1;
TIM1->CR1 |= TIM_CR1_CEN;
+ /* Configure Timer 1 update (overrun) interrupt on NVIC.
+ * Used only for update (overrun) for strobe timing. */
NVIC_EnableIRQ(TIM1_BRK_UP_TRG_COM_IRQn);
NVIC_SetPriority(TIM1_BRK_UP_TRG_COM_IRQn, 2);
+ /* Pre-load initial values, kick of first interrupt */
TIM1->EGR |= TIM_EGR_UG;
+ /* Configure TIM3 for USART timeout handing */
TIM3->CR1 = TIM_CR1_OPM;
TIM3->DIER = TIM_DIER_UIE;
TIM3->PSC = 31;
TIM3->ARR = 1000;
+ /* Configure Timer 3 update (overrun) interrupt on NVIC.
+ * Used only for update (overrun) for USART timeout handling. */
NVIC_EnableIRQ(TIM3_IRQn);
NVIC_SetPriority(TIM3_IRQn, 2);
+ /* Pre-load initial values */
TIM3->EGR |= TIM_EGR_UG;
/* Configure UART for RS485 comm */
@@ -169,47 +180,34 @@ int main(void) {
/* other interrupts clear */
| USART_CR1_TE
| USART_CR1_RE;
- //USART1->CR2 = USART_CR2_RTOEN; /* Timeout enable */
USART1->CR3 = USART_CR3_DEM; /* RS485 DE enable (output on RTS) */
USART1->BRR = 32;
USART1->CR1 |= USART_CR1_UE;
- //NVIC_EnableIRQ(USART1_IRQn);
+ /* Configure USART1 interrupt on NVIC. Used only for RX. */
+ NVIC_EnableIRQ(USART1_IRQn);
NVIC_SetPriority(USART1_IRQn, 2);
+ /* Idly loop around, occassionally disfiguring some integers. */
while (42) {
-#define HUE_MAX ((1<<NBITS)*6)
-#define HUE_OFFX 0.15F /* 0-1 */
-#define HUE_AMPLITUDE 0.05F /* 0-1 */
-#define CHANNEL_SPACING 1.5F /* in radians */
-#define WHITE 0.2F /* 0-1 */
- for (float v=0; v<8*M_PI; v += 0.01F) {
- GPIOA->ODR ^= GPIO_ODR_6;
- /* generate hsv fade */
- for (int ch=0; ch<8; ch++) {
- hue = HUE_MAX * (HUE_OFFX + HUE_AMPLITUDE*sinf(v + ch*CHANNEL_SPACING));
- hue %= HUE_MAX;
- //hsv_set(ch, hue, WHITE*(1<<NBITS));
- brightness[ch*4+0] = 128;
- brightness[ch*4+1] = 0;
- brightness[ch*4+2] = 128;
- brightness[ch*4+3] = 0;
- }
- do_transpose();
- for (int k=0; k<10000; k++) {
- asm volatile("nop");
- }
- }
+ /* Debug output on LED. */
+ GPIOA->ODR ^= GPIO_ODR_6;
+
+ /* Bit-mangle the integer brightness data to produce raw modulation data */
+ do_transpose();
+
+ /* Wait a moment */
+ for (int k=0; k<10000; k++)
+ asm volatile("nop");
}
}
-uint32_t brightness[32] = {0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00};
-volatile uint32_t brightness_by_bit[NBITS] = { 0 };
-
+/* Modulation data bit golfing routine */
void do_transpose(void) {
+ /* For each bit value */
for (uint32_t i=0; i<NBITS; i++) {
- uint32_t bv = 0;
- uint32_t mask = 1<<i<<(16-NBITS);
+ uint32_t mask = 1<<i<<(MAX_BITS-NBITS); /* Bit mask for this bit value. */
+ uint32_t bv = 0; /* accumulator thing */
for (uint32_t j=0; j<32; j++) {
if (brightness[j] & mask)
bv |= 1<<j;
@@ -218,45 +216,115 @@ void do_transpose(void) {
}
}
+/* Bit timing base value. This is the lowes bit interval used */
+#define PERIOD_BASE 4
+
+/* This value is a constant offset added to every bit period to allow for the timer IRQ handler to execute. This is set
+ * empirically using a debugger and a logic analyzer. */
+#define TIMER_CYCLES_FOR_SPI_TRANSMISSIONS 120
+/* This is the same as above, but for the reset cycle of the bit period. */
+#define RESET_PERIOD_LENGTH 40
+
+/* Defines for brevity */
+#define A TIMER_CYCLES_FOR_SPI_TRANSMISSIONS
+#define B PERIOD_BASE
+
+/* This is a constant offset containing some empirically determined correction values */
+#define C (1 /* reset pulse comp */ - 3 /* analog snafu comp */)
+
+/* This lookup table maps bit positions to timer period values. This is a lookup table to allow for the compensation for
+ * non-linear effects of ringing at lower bit durations.
+ */
+static uint16_t timer_period_lookup[NBITS] = {
+ /* LSB here */
+ A - C + (B<< 0),
+ A - C + (B<< 1),
+ A - C + (B<< 2),
+ A - C + (B<< 3),
+ A - C + (B<< 4),
+ A - C + (B<< 5),
+ A - C + (B<< 6),
+ A - C + (B<< 7),
+ A - C + (B<< 8),
+ A - C + (B<< 9),
+ A - C + (B<<10),
+ A - C + (B<<11),
+ A - C + (B<<12),
+ A - C + (B<<13),
+ /* MSB here */
+};
+
+/* Don't pollute the global namespace */
+#undef A
+#undef B
+#undef C
+
+/* Timer 1 main IRQ handler. This is used only for overflow ("update" or UP event in ST's terminology). */
void TIM1_BRK_UP_TRG_COM_IRQHandler(void) {
/* The index of the currently active bit. On entry of this function, this is the bit index of the upcoming period.
* On exit it is the index of the *next* period. */
- static uint32_t idx = 0;
-
- /* Access bits offset by one as we are setting the *next* period based on idx below. */
- uint32_t val = brightness_by_bit[idx];
-
- idx++;
- if (idx >= NBITS)
- idx = 0;
-
- GPIOA->ODR ^= GPIO_ODR_6; /* LED1 */
-
- /* Shift out the current period's data. The shift register clear and strobe lines are handled by the timers
- * capture/compare channel 3 complementary outputs. The dead-time generator is used to sequence the clear and strobe
- * edges one after another. Since there may be small variations in IRQ service latency it is critical to allow for
- * some leeway between the end of this data transmission and strobe and clear. */
- SPI1->DR = (val&0xffff);
- while (SPI1->SR & SPI_SR_BSY);
- SPI1->DR = (val>>16);
- while (SPI1->SR & SPI_SR_BSY);
-
- /* Set up everything for the *next* period. The timer is set to count from 0 to ARR. ARR and CCR3 are pre-loaded, so
- * the values written above will only be latched on timer overrun at the end of this period. This is a little
- * complicated, but doing it this way has the advantage of keeping both duty cycle and frame rate precisely
- * constant. */
- const int period_base = 4; /* 1us */
- const int period = (period_base<<idx) + 4 /* 1us dead time */;
- const int timer_cycles_for_spi_transmissions = 128;
- TIM1->ARR = period + timer_cycles_for_spi_transmissions;
- TIM1->CCR3 = timer_cycles_for_spi_transmissions;
+ static int idx = 0;
+ /* We modulate all outputs simultaneously in n periods, with n being the modulation depth (the number of bits).
+ * Each period is split into two timer cycles. First, a long one during which the data for the current period is
+ * shifted out and subsequently latched to the outputs. Then, a short one that is used to reset all outputs in time
+ * for the next period.
+ *
+ * bit value: | <-- least significant, shortest period / most significant, longest period --> |
+ * bit number: | b0 | b1 | ... | b10 | b11 |
+ * name: | data cycle | reset cycle | | | | |
+ * function: | shift data <strobe> wait | | ... | ... | ... | ... |
+ * duration: | fixed variable | fixed | | | | |
+ *
+ * Now, alternate between the two cycles in one phase.
+ */
+ static int clear = 0;
+ if ((clear = !clear)) {
+ /* Access bits offset by one as we are setting the *next* period based on idx below. */
+ uint32_t val = brightness_by_bit[idx];
+
+ /* Shift out the current period's data. The shift register clear and strobe lines are handled by the timers
+ * capture/compare channel 3 complementary outputs. The dead-time generator is used to sequence the clear and strobe
+ * edges one after another. Since there may be small variations in IRQ service latency it is critical to allow for
+ * some leeway between the end of this data transmission and strobe and clear. */
+ SPI1->DR = (val&0xffff);
+ while (SPI1->SR & SPI_SR_BSY);
+ SPI1->DR = (val>>16);
+ while (SPI1->SR & SPI_SR_BSY);
+
+ /* Increment the bit index for the next cycle */
+ idx++;
+ if (idx >= NBITS)
+ idx = 0;
+
+ /* Set up the following reset pulse cycle. This cycle is short as it only needs to be long enough for the below
+ * part of this ISR handler routine to run. */
+ TIM1->ARR = RESET_PERIOD_LENGTH;
+ TIM1->CCR3 = 1; /* This value is fixed to produce a very short reset pulse. IOs, PCB and shift registers all can
+ easily handle this. */
+ } else {
+ /* Set up everything for the data cycle of the *next* period. The timer is set to count from 0 to ARR. ARR and
+ * CCR3 are pre-loaded, so the values written above will only be latched on timer overrun at the end of this
+ * period. This is a little complicated, but doing it this way has the advantage of keeping both duty cycle and
+ * frame rate precisely constant. */
+ TIM1->CCR3 = TIMER_CYCLES_FOR_SPI_TRANSMISSIONS;
+ TIM1->ARR = timer_period_lookup[idx];
+ }
+ /* Reset the update interrupt flag. This ISR handler routine is only used for timer update events. */
TIM1->SR &= ~TIM_SR_UIF_Msk;
}
+/* The data format of the serial command interface.
+ *
+ * The serial interface uses short packets. Currently, there is only one packet type defined: a "set RGBW" packet, using
+ * command ID 0x23. The packet starts with the command ID, followed by the addressed channel group, followed by four
+ * times two bytes of big-endian RGBW channel data.
+ *
+ *
+ */
union packet {
struct {
uint8_t cmd; /* 0x23 */
- uint8_t step; /* 0-12, numbered from bottom */
+ uint8_t step; /* logical channel. The USART_CHANNEL_OFFX is applied on this number below. */
union {
uint16_t rgbw[4];
struct {
@@ -276,9 +344,33 @@ void TIM3_IRQHandler(void) {
rxpos = 0;
}
-#define USART_OFFX 8
+/* This macro defines the lowest channel number of this board on the serial command bus. On a shared bus with several
+ * boards, you would generally assign increasing USART_CHANNEL_OFFX values to each one (0, 8, 16, 24, ...).
+ *
+ * Example: Let USART_CHANNEL_OFFX be 8.
+ *
+ * /--Command channel number received in command packet (packet.set_step.step)
+ * | /--USART_OFFX
+ * | | /--4 raw channels per logical channel (step): R, G, B, W
+ * | | | /--Raw channel offset for R, G, B, W
+ * | | | | /--Resulting raw channels for R, G, B, W data received in command packet
+ * | | | | |
+ * v v v v v
+ *
+ * (8 - 8) * 4 + {0, 1, 2, 3} = {0, 1, 2, 3}
+ * (9 - 8) * 4 + {0, 1, 2, 3}
+ * (10 - 8) * 4 + {0, 1, 2, 3}
+ * (11 - 8) * 4 + {0, 1, 2, 3}
+ * (12 - 8) * 4 + {0, 1, 2, 3}
+ * (13 - 8) * 4 + {0, 1, 2, 3}
+ * (14 - 8) * 4 + {0, 1, 2, 3}
+ * (15 - 8) * 4 + {0, 1, 2, 3}
+ */
+#ifndef USART_CHANNEL_OFFX
+#define USART_CHANNEL_OFFX 8
+#endif//USART_CHANNEL_OFFX
+
#define NCHANNELS (sizeof(brightness)/sizeof(brightness[0]))
-int last_step = NCHANNELS/4;
void USART1_IRQHandler() {
static union packet rxbuf;
@@ -287,36 +379,34 @@ void USART1_IRQHandler() {
/* Overrun detected? */
if (isr & USART_ISR_ORE) {
USART1->ICR = USART_ICR_ORECF; /* Acknowledge overrun */
- //asm("bkpt"); FIXME
+ //asm("bkpt"); /* uncomment for debug */
return;
}
if (!(isr & USART_ISR_RXNE)) {
- //asm("bkpt"); FIXME
+ //asm("bkpt"); /* uncomment for debug */
return;
}
+ /* Store received data */
uint8_t data = USART1->RDR;
rxbuf.data[rxpos] = data;
rxpos++;
+ /* If we finished receiving a packet, deal with it. */
if (rxpos == sizeof(union packet)) {
+ /* Check packet header */
if (rxbuf.set_step.cmd == 0x23 &&
- rxbuf.set_step.step >= USART_OFFX &&
- rxbuf.set_step.step < USART_OFFX+NCHANNELS) {
- if (rxbuf.set_step.step != last_step+1)
- if (last_step != USART_OFFX+(NCHANNELS/4)-1 && rxbuf.set_step.step != 0) {
- //asm("bkpt");
- }
- last_step = rxbuf.set_step.step;
-
- /*
- if (rxbuf.set_step.step == 8 && last_step != 15)
- asm("bkpt");
- */
-
- uint32_t *out = &brightness[(rxbuf.set_step.step - USART_OFFX)*4];
- /* (matti) (treppe)
+ /* bounds-check received channel number. This allows several driver boards to share one common serial bus */
+ rxbuf.set_step.step >= USART_CHANNEL_OFFX &&
+ rxbuf.set_step.step < USART_CHANNEL_OFFX+NCHANNELS) {
+
+ /* Calculate raw channel brightness value base address for logical channel */
+ uint32_t *out = &brightness[(rxbuf.set_step.step - USART_CHANNEL_OFFX)*4];
+
+ /* Correct RGBW raw channel ordering per logical channel according to SUB-D pinout used.
+ *
+ * (matti) (treppe)
* weiß blau
* rot weiß
* grün rot
@@ -327,13 +417,16 @@ void USART1_IRQHandler() {
out[3] = rxbuf.set_step.rgbw[2];
out[0] = rxbuf.set_step.rgbw[3];
}
+ /* Reset receive data counter */
rxpos = 0;
}
+ /* Reset usart timeout handler */
TIM3->CNT = 0;
TIM3->CR1 |= TIM_CR1_CEN;
}
+/* Misc IRQ handlers */
void NMI_Handler(void) {
}
@@ -357,9 +450,9 @@ void SysTick_Handler(void) {
}
}
-/* FIXME */
+/* Misc stuff for nostdlib linking */
void _exit(int status) { while (23); }
void *__bss_start__;
void *__bss_end__;
-
int __errno;
+