124 lines
3.2 KiB
C++
124 lines
3.2 KiB
C++
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/**
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*
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* @license MIT License
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*
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* Copyright (c) 2024 lewis he
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*
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* Permission is hereby granted, free of charge, to any person obtaining a copy
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* of this software and associated documentation files (the "Software"), to deal
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* in the Software without restriction, including without limitation the rights
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* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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* copies of the Software, and to permit persons to whom the Software is
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* furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be included in all
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* copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
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* SOFTWARE.
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*
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* @file ExtensionSPI.hpp
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* @author Lewis He (lewishe@outlook.com)
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* @date 2024-01-19
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*
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*/
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#pragma once
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#include "SensorLib.h"
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template <class chipType>
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class ExtensionSPI
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{
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public:
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void beginSPI(int mosi,
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int miso,
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int sck,
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int cs
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)
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{
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_mosi = mosi;
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_miso = miso;
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_sck = sck;
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_cs = cs;
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thisChip().pinMode(_mosi, OUTPUT);
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thisChip().pinMode(_sck, OUTPUT);
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if (_cs != -1) {
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thisChip().pinMode(_cs, OUTPUT);
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thisChip().digitalWrite(_cs, HIGH);
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}
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if (_miso != -1) {
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thisChip().pinMode(_miso, INPUT);
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}
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thisChip().digitalWrite(_mosi, HIGH);
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thisChip().digitalWrite(_sck, HIGH);
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}
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void setBitOrder(uint8_t order)
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{
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_order = order & 1;
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}
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uint8_t transfer8(uint8_t val)
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{
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return transferDataBits(val, 8);
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}
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uint16_t transfer9(uint16_t val)
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{
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return transferDataBits(val, 9);
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}
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uint32_t transferDataBits(uint32_t val, uint32_t bits)
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{
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uint32_t mask = _BV(bits - 1);
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uint8_t out = 0;
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if (_cs != -1) {
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thisChip().digitalWrite(_cs, LOW);
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}
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for (int i = 0; i < bits ; i++) {
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thisChip().digitalWrite(_sck, LOW);
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out <<= 1;
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if (_miso != -1) {
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if (thisChip().digitalRead(_miso)) {
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out |= 0x01;
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}
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}
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thisChip().digitalWrite(_mosi, val & mask ? HIGH : LOW);
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val <<= 1;
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thisChip().digitalWrite(_sck, HIGH);
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}
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if (_cs != -1) {
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thisChip().digitalWrite(_cs, HIGH);
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}
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return out;
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}
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protected:
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inline const chipType &thisChip() const
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{
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return static_cast<const chipType &>(*this);
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}
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inline chipType &thisChip()
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{
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return static_cast<chipType &>(*this);
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}
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private:
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int _mosi;
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int _sck;
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int _miso;
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int _order;
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int _cs;
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};
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