Added sunxi fex

Author: KOLANICH

LICENSES/Unlicense.md

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+Unlicense (Public Domain)
+============================
+
+This is free and unencumbered software released into the public domain.
+
+Anyone is free to copy, modify, publish, use, compile, sell, or
+distribute this software, either in source code form or as a compiled
+binary, for any purpose, commercial or non-commercial, and by any
+means.
+
+In jurisdictions that recognize copyright laws, the author or authors
+of this software dedicate any and all copyright interest in the
+software to the public domain. We make this dedication for the benefit
+of the public at large and to the detriment of our heirs and
+successors. We intend this dedication to be an overt act of
+relinquishment in perpetuity of all present and future rights to this
+software under copyright law.
+
+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 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.
+
+For more information, please refer to &lt;<https://unlicense.org/>&gt;

firmware/sunxi_fex/ReadMe.md

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+<!--
+SPDX-FileCopyrightText: 2021 KOLANICH
+
+SPDX-License-Identifier: Unlicense
+-->
+
+## test.fex & test.fex.bin
+
+Example files of sunxi fex format.
+
+Source: own work

firmware/sunxi_fex/generate.sh

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+#!/usr/bin/env sh
+
+# SPDX-FileCopyrightText: 2021 KOLANICH
+# SPDX-License-Identifier: Unlicense
+
+./sunxi-fexc -I fex -O bin test.fex test.fex.bin

firmware/sunxi_fex/test.fex

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+[test]
+kaitai = "struct"
+version = 100500
+is_awesome =
+
+[ports]
+python = port:PA01<1><2><3><4>
+js = port:PB01<1><2><3><default>
+scala = port:PC01<1><2><default><default>
+java = port:PD01<1><default><default><default>
+rust = port:power1<default><default><default><default>
+

firmware/sunxi_fex/test.fex.bin

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+SPDX-FileCopyrightText: 2021 KOLANICH
+SPDX-License-Identifier: Unlicense

firmware/sunxi_fex/test.fex.bin.license

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+SPDX-FileCopyrightText: 2021 KOLANICH
+SPDX-License-Identifier: Unlicense