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✨ Ender 3 S1 Pro/Plus stock touchscreen (#25905)
Co-authored-by: Scott Lahteine <[email protected]>
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/** | ||
* Marlin 3D Printer Firmware | ||
* Copyright (c) 2023 MarlinFirmware [https://github.com/MarlinFirmware/Marlin] | ||
* | ||
* Based on Sprinter and grbl. | ||
* Copyright (c) 2011 Camiel Gubbels / Erik van der Zalm | ||
* | ||
* This 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 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 General Public License for more details. | ||
* | ||
* You should have received a copy of the GNU General Public License | ||
* along with this program. If not, see <https://www.gnu.org/licenses/>. | ||
* | ||
*/ | ||
#pragma once | ||
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#include "../core/types.h" | ||
#include "../core/macros.h" | ||
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#ifdef __cplusplus | ||
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namespace Endianness { | ||
static constexpr uint32_t _dword = 0x01020304; | ||
static constexpr uint8_t _lsb = (const uint8_t&)_dword; | ||
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static constexpr bool cpuIsLittleEndian = _lsb == 0x04; | ||
static constexpr bool cpuIsBigEndian = _lsb == 0x01; | ||
static_assert(cpuIsLittleEndian ^ cpuIsBigEndian, "Unknown CPU endianness"); | ||
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// constexpr byte swapping for integral types | ||
template<typename T> static constexpr typename Private::enable_if<Private::is_integral<T>::value, T>::type swap(T V, T swappedV=(T)0, size_t byteIndex=0) { | ||
return byteIndex == sizeof(T) | ||
? swappedV | ||
: swap<T>((T)(V >> 8), (swappedV << 8) | (V & (T)0xFF), byteIndex + 1); | ||
} | ||
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// constexpr byte swapping for types derived from integral types (e.g. enums) | ||
template<typename T> static constexpr typename Private::enable_if< | ||
Private::is_same<uint16_t, typename Private::underlying_type<T>::type>::value, T>::type swap(T V) { return (T)swap<uint16_t>((uint16_t)V); } | ||
template<typename T> static constexpr typename Private::enable_if< | ||
Private::is_same<uint32_t, typename Private::underlying_type<T>::type>::value, T>::type swap(T V) { return (T)swap<uint32_t>((uint32_t)V); } | ||
template<typename T> static constexpr typename Private::enable_if< | ||
Private::is_same<uint64_t, typename Private::underlying_type<T>::type>::value, T>::type swap(T V) { return (T)swap<uint64_t>((uint64_t)V); } | ||
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// Generic byte swapping | ||
// CANNOT be used to initialize constexpr declarations | ||
template<typename T> static constexpr typename Private::enable_if<!Private::is_integral<T>::value && !Private::is_enum<T>::value, T>::type swap(T V) { | ||
union { | ||
T val; | ||
char byte[sizeof(T)]; | ||
} src{}, dst{}; | ||
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src.val = V; | ||
for (uint8_t i = 0; i < sizeof(T); ++i) dst.byte[i] = src.byte[sizeof(T) - i - 1]; | ||
return dst.val; | ||
} | ||
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// Convert to / from known endianness, depending on the host endianness | ||
template<typename T> static constexpr T toBE(T V) { return cpuIsLittleEndian ? swap(V) : V; } | ||
template<typename T> static constexpr T toLE(T V) { return cpuIsLittleEndian ? V : swap(V); } | ||
template<typename T> static constexpr T fromBE(T V) { return cpuIsLittleEndian ? swap(V) : V; } | ||
template<typename T> static constexpr T fromLE(T V) { return cpuIsLittleEndian ? V : swap(V); } | ||
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// Reads a big/little endian from a pointer and converts it to the host endianness | ||
template<typename T> static constexpr T fromBE_P(void* V) { return fromBE(*(T*)V); } | ||
template<typename T> static constexpr T fromLE_P(void* V) { return fromLE(*(T*)V); } | ||
}; | ||
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#endif // __cplusplus |
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