Clarify licences

4 files changed, 254 insertions, 4 deletions

diff --git a/MIT.txt b/MIT.txt
new file mode 100644
index 0000000..06ef205
--- /dev/null
+++ b/MIT.txt
@@ -0,0 +1,21 @@
+The MIT License (MIT)
+
+Copyright (c) 2020 Matthias P. Braendli
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in all
+copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+SOFTWARE.
diff --git a/README.md b/README.md
index 6e71480..6e9a6b6 100644
--- a/README.md
+++ b/README.md
@@ -3,10 +3,16 @@ Picardy 2020
 
 A reinterpretation of the [Picardy 2m SSB transceiver](http://f6feo.homebuilder.free.fr/transceiver_PICARDY.html) by F6FEO
 combined with the [Anglian 3L transverter](http://www.g4ddk.com/Products.html).
+Additional inspirations: uBitx, the KN-Q7, LimeRFE and EI9GQ's "Building a Transceiver" book. Many thanks to all the
+designers behind these projects.
+
+The hardware design is licenced under the "CERN Open Hardware Licence Version 2 - Permissive", see *cern_ohl_p_v2.txt*.
+The firmware is MIT-licenced.
 
 * Designed in KiCad
 * Meant to be used with a microwave transverter
   * But also stand-alone 28MHz and 144MHz (The IF bands)
+  * Offer plug-in band-filters for other HF bands
 * Using a STM32F103C8T6 controller
   * Si5351 clock source (generates 3 clocks)
   * An LCD display
@@ -15,10 +21,8 @@ combined with the [Anglian 3L transverter](http://www.g4ddk.com/Products.html).
   * Offer a 10MHz output refclk for a transverter
   * Instead, have a 25MHz ref input, and use a LeoBodnar reference
 
-* Very good [explanations](https://groups.io/g/BITX20/topic/si5351a_facts_and_myths/5430607) about DDS vs DPLL from Hans Summers
-
-TODO before ordering the PCB
-============================
+Open questions
+==============
 
 * CW
   * Does the trick with the DC bias to leak the LO work ?
@@ -70,6 +74,8 @@ PCB Assembly Plan
 Additional remarks
 ==================
 
+* Very good [explanations](https://groups.io/g/BITX20/topic/si5351a_facts_and_myths/5430607) about DDS vs DPLL from Hans Summers
+
 * Si5153 test before PCB fab:
   * It seems the desired frequency plan can be achieved:
     * clk0: LO1 = 28 - 4.9152 + VFO, i.e. from 23 to 25
diff --git a/cern_ohl_p_v2.txt b/cern_ohl_p_v2.txt
new file mode 100644
index 0000000..f19d2b7
--- /dev/null
+++ b/cern_ohl_p_v2.txt
@@ -0,0 +1,199 @@
+CERN Open Hardware Licence Version 2 - Permissive
+
+
+Preamble
+
+CERN has developed this licence to promote collaboration among
+hardware designers and to provide a legal tool which supports the
+freedom to use, study, modify, share and distribute hardware designs
+and products based on those designs. Version 2 of the CERN Open
+Hardware Licence comes in three variants: this licence, CERN-OHL-P
+(permissive); and two reciprocal licences: CERN- OHL-W (weakly
+reciprocal) and CERN-OHL-S (strongly reciprocal).
+
+The CERN-OHL-P is copyright CERN 2020. Anyone is welcome to use it, in
+unmodified form only.
+
+Use of this Licence does not imply any endorsement by CERN of any
+Licensor or their designs nor does it imply any involvement by CERN in
+their development.
+
+
+1 Definitions
+
+  1.1 'Licence' means this CERN-OHL-P.
+
+  1.2 'Source' means information such as design materials or digital
+      code which can be applied to Make or test a Product or to
+      prepare a Product for use, Conveyance or sale, regardless of its
+      medium or how it is expressed. It may include Notices.
+
+  1.3 'Covered Source' means Source that is explicitly made available
+      under this Licence.
+
+  1.4 'Product' means any device, component, work or physical object,
+      whether in finished or intermediate form, arising from the use,
+      application or processing of Covered Source.
+
+  1.5 'Make' means to create or configure something, whether by
+     manufacture, assembly, compiling, loading or applying Covered
+     Source or another Product or otherwise.
+
+  1.6 'Notice' means copyright, acknowledgement and trademark notices,
+      references to the location of any Notices, modification notices
+      (subsection 3.3(b)) and all notices that refer to this Licence
+      and to the disclaimer of warranties that are included in the
+      Covered Source.
+
+  1.7 'Licensee' or 'You' means any person exercising rights under
+      this Licence.
+
+  1.8 'Licensor' means a person who creates Source or modifies Covered
+      Source and subsequently Conveys the resulting Covered Source
+      under the terms and conditions of this Licence. A person may be
+      a Licensee and a Licensor at the same time.
+
+  1.9 'Convey' means to communicate to the public or distribute.
+
+
+2 Applicability
+
+  2.1 This Licence governs the use, copying, modification, Conveying
+      of Covered Source and Products, and the Making of Products. By
+      exercising any right granted under this Licence, You irrevocably
+      accept these terms and conditions.
+
+  2.2 This Licence is granted by the Licensor directly to You, and
+      shall apply worldwide and without limitation in time.
+
+  2.3 You shall not attempt to restrict by contract or otherwise the
+      rights granted under this Licence to other Licensees.
+
+  2.4 This Licence is not intended to restrict fair use, fair dealing,
+      or any other similar right.
+
+
+3 Copying, modifying and Conveying Covered Source
+
+  3.1 You may copy and Convey verbatim copies of Covered Source, in
+      any medium, provided You retain all Notices.
+
+  3.2 You may modify Covered Source, other than Notices.
+
+      You may only delete Notices if they are no longer applicable to
+      the corresponding Covered Source as modified by You and You may
+      add additional Notices applicable to Your modifications.
+
+  3.3 You may Convey modified Covered Source (with the effect that You
+      shall also become a Licensor) provided that You:
+
+       a) retain Notices as required in subsection 3.2; and
+
+       b) add a Notice to the modified Covered Source stating that You
+          have modified it, with the date and brief description of how
+          You have modified it.
+
+  3.4 You may Convey Covered Source or modified Covered Source under
+      licence terms which differ from the terms of this Licence
+      provided that:
+
+       a) You comply at all times with subsection 3.3; and
+
+       b) You provide a copy of this Licence to anyone to whom You
+          Convey Covered Source or modified Covered Source.
+
+
+4 Making and Conveying Products
+
+You may Make Products, and/or Convey them, provided that You ensure
+that the recipient of the Product has access to any Notices applicable
+to the Product.
+
+
+5 DISCLAIMER AND LIABILITY
+
+  5.1 DISCLAIMER OF WARRANTY -- The Covered Source and any Products
+      are provided 'as is' and any express or implied warranties,
+      including, but not limited to, implied warranties of
+      merchantability, of satisfactory quality, non-infringement of
+      third party rights, and fitness for a particular purpose or use
+      are disclaimed in respect of any Source or Product to the
+      maximum extent permitted by law. The Licensor makes no
+      representation that any Source or Product does not or will not
+      infringe any patent, copyright, trade secret or other
+      proprietary right. The entire risk as to the use, quality, and
+      performance of any Source or Product shall be with You and not
+      the Licensor. This disclaimer of warranty is an essential part
+      of this Licence and a condition for the grant of any rights
+      granted under this Licence.
+
+  5.2 EXCLUSION AND LIMITATION OF LIABILITY -- The Licensor shall, to
+      the maximum extent permitted by law, have no liability for
+      direct, indirect, special, incidental, consequential, exemplary,
+      punitive or other damages of any character including, without
+      limitation, procurement of substitute goods or services, loss of
+      use, data or profits, or business interruption, however caused
+      and on any theory of contract, warranty, tort (including
+      negligence), product liability or otherwise, arising in any way
+      in relation to the Covered Source, modified Covered Source
+      and/or the Making or Conveyance of a Product, even if advised of
+      the possibility of such damages, and You shall hold the
+      Licensor(s) free and harmless from any liability, costs,
+      damages, fees and expenses, including claims by third parties,
+      in relation to such use.
+
+
+6 Patents
+
+  6.1 Subject to the terms and conditions of this Licence, each
+      Licensor hereby grants to You a perpetual, worldwide,
+      non-exclusive, no-charge, royalty-free, irrevocable (except as
+      stated in this section 6, or where terminated by the Licensor
+      for cause) patent license to Make, have Made, use, offer to
+      sell, sell, import, and otherwise transfer the Covered Source
+      and Products, where such licence applies only to those patent
+      claims licensable by such Licensor that are necessarily
+      infringed by exercising rights under the Covered Source as
+      Conveyed by that Licensor.
+
+  6.2 If You institute patent litigation against any entity (including
+      a cross-claim or counterclaim in a lawsuit) alleging that the
+      Covered Source or a Product constitutes direct or contributory
+      patent infringement, or You seek any declaration that a patent
+      licensed to You under this Licence is invalid or unenforceable
+      then any rights granted to You under this Licence shall
+      terminate as of the date such process is initiated.
+
+
+7 General
+
+  7.1 If any provisions of this Licence are or subsequently become
+      invalid or unenforceable for any reason, the remaining
+      provisions shall remain effective.
+
+  7.2 You shall not use any of the name (including acronyms and
+      abbreviations), image, or logo by which the Licensor or CERN is
+      known, except where needed to comply with section 3, or where
+      the use is otherwise allowed by law. Any such permitted use
+      shall be factual and shall not be made so as to suggest any kind
+      of endorsement or implication of involvement by the Licensor or
+      its personnel.
+
+  7.3 CERN may publish updated versions and variants of this Licence
+      which it considers to be in the spirit of this version, but may
+      differ in detail to address new problems or concerns. New
+      versions will be published with a unique version number and a
+      variant identifier specifying the variant. If the Licensor has
+      specified that a given variant applies to the Covered Source
+      without specifying a version, You may treat that Covered Source
+      as being released under any version of the CERN-OHL with that
+      variant. If no variant is specified, the Covered Source shall be
+      treated as being released under CERN-OHL-S. The Licensor may
+      also specify that the Covered Source is subject to a specific
+      version of the CERN-OHL or any later version in which case You
+      may apply this or any later version of CERN-OHL with the same
+      variant identifier published by CERN.
+
+  7.4 This Licence shall not be enforceable except by a Licensor
+      acting as such, and third party beneficiary rights are
+      specifically excluded.
diff --git a/sw/demo1/src/main.rs b/sw/demo1/src/main.rs
index 093df4f..3f98295 100644
--- a/sw/demo1/src/main.rs
+++ b/sw/demo1/src/main.rs
@@ -1,3 +1,27 @@
+/*
+    The MIT License (MIT)
+
+    Copyright (c) 2020 Matthias P. Braendli
+
+    Permission is hereby granted, free of charge, to any person obtaining a copy
+    of this software and associated documentation files (the "Software"), to deal
+    in the Software without restriction, including without limitation the rights
+    to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+    copies of the Software, and to permit persons to whom the Software is
+    furnished to do so, subject to the following conditions:
+
+    The above copyright notice and this permission notice shall be included in all
+    copies or substantial portions of the Software.
+
+    THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+    IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+    FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+    AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+    LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+    OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+    SOFTWARE.
+*/
+
 #![no_main]
 #![no_std]