add license file

1 files changed, 91 insertions, 0 deletions

diff --git a/LICENSE.md b/LICENSE.md
new file mode 100644
index 00000000..ed4138f1
--- /dev/null
+++ b/LICENSE.md
@@ -0,0 +1,91 @@
+Sensor Watch Licenses
+=====================
+
+Several different components of the project are licensed differently. In summary:
+
+* The PCB design files are provided under a copyleft-style Creative Commons Attribution-ShareAlike 4.0 license. Commercial use is explicitly permitted, but you must credit the author and share derivitave designs under a Creative Commons Attribution-ShareAlike 4.0 (or compatible) license.
+* For the most part, the sensor watch library code uses the permissive MIT license. Commercial use is explicitly permitted, and there is no requirement to share derivative works.
+* The debug UART setup is BSD licensed code from Alex Taradov's excellent [Bare-Metal MCU Starter Projects](https://github.com/ataradov/mcu-starter-projects) repository. I would like to refactor the debug UART to communicate over USB, however; once this UART code is removed, the whole watch library should be MIT-licensed.
+* The Microchip / Atmel Studio Framework support code is provided by Microchip for use with Microchip products. I have no idea how compatible this is with anything else, but this code is only required to interface with the SAM L22, which is a Microchip product.
+
+Sensor Watch PCB Designs
+------------------------
+
+This work is licensed under the Creative Commons Attribution 4.0 International License. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/ or send a letter to Creative Commons, PO Box 1866, Mountain View, CA 94042, USA.
+
+Sensor Watch Library
+--------------------
+
+MIT License
+
+Copyright (c) 2021 Joey Castillo
+
+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.
+
+UART Methods
+------------
+
+Copyright (c) 2014-2016, Alex Taradov <alex@taradov.com>
+All rights reserved.
+
+Redistribution and use in source and binary forms, with or without
+modification, are permitted provided that the following conditions are met:
+
+1. Redistributions of source code must retain the above copyright notice,
+   this list of conditions and the following disclaimer.
+2. Redistributions in binary form must reproduce the above copyright
+   notice, this list of conditions and the following disclaimer in the
+   documentation and/or other materials provided with the distribution.
+3. The name of the author may not be used to endorse or promote products
+   derived from this software without specific prior written permission.
+
+THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
+LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+POSSIBILITY OF SUCH DAMAGE.
+
+Atmel Studio Framework Code
+---------------------------
+
+Copyright (c) 2014-2018 Microchip Technology Inc. and its subsidiaries.
+
+Subject to your compliance with these terms, you may use Microchip
+software and any derivatives exclusively with Microchip products.
+It is your responsibility to comply with third party license terms applicable
+to your use of third party software (including open source software) that
+may accompany Microchip software.
+
+THIS SOFTWARE IS SUPPLIED BY MICROCHIP "AS IS". NO WARRANTIES,
+WHETHER EXPRESS, IMPLIED OR STATUTORY, APPLY TO THIS SOFTWARE,
+INCLUDING ANY IMPLIED WARRANTIES OF NON-INFRINGEMENT, MERCHANTABILITY,
+AND FITNESS FOR A PARTICULAR PURPOSE. IN NO EVENT WILL MICROCHIP BE
+LIABLE FOR ANY INDIRECT, SPECIAL, PUNITIVE, INCIDENTAL OR CONSEQUENTIAL
+LOSS, DAMAGE, COST OR EXPENSE OF ANY KIND WHATSOEVER RELATED TO THE
+SOFTWARE, HOWEVER CAUSED, EVEN IF MICROCHIP HAS BEEN ADVISED OF THE
+POSSIBILITY OR THE DAMAGES ARE FORESEEABLE.  TO THE FULLEST EXTENT
+ALLOWED BY LAW, MICROCHIP'S TOTAL LIABILITY ON ALL CLAIMS IN ANY WAY
+RELATED TO THIS SOFTWARE WILL NOT EXCEED THE AMOUNT OF FEES, IF ANY,
+THAT YOU HAVE PAID DIRECTLY TO MICROCHIP FOR THIS SOFTWARE.