81 lines
1.9 KiB
C++
81 lines
1.9 KiB
C++
/*
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Copyright 2018 Sam Stevens
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Licensed under the Apache License, Version 2.0 (the "License");
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you may not use this file except in compliance with the License.
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You may obtain a copy of the License at
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http://www.apache.org/licenses/LICENSE-2.0
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Unless required by applicable law or agreed to in writing, software
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distributed under the License is distributed on an "AS IS" BASIS,
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WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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See the License for the specific language governing permissions and
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limitations under the License.
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*/
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#ifndef UVM_MEMORY_H
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#define UVM_MEMORY_H
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#include <SPI.h>
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enum MemoryMode_t {
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MODE_BYTE = 0x00,
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MODE_PAGE = 0x80,
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MODE_SEQ = 0x40
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};
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typedef enum MemoryMode_t MemoryMode;
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enum MemoryInstruction_t {
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INSTR_READ = 0x03,
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INSTR_WRITE = 0x02,
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INSTR_EDIO = 0x3B,
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INSTR_RESIO = 0xFF,
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INSTR_RDMR = 0x05,
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INSTR_WRMR = 0x01
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};
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typedef enum MemoryInstruction_t MemoryInstruction;
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class Memory {
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SPISettings setting;
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uint8_t csPin;
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uint16_t memSize;
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void start();
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void end();
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public:
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Memory(uint8_t csPin);
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uint16_t getSize();
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void setSize(uint16_t memSize);
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void setMode(MemoryMode mode);
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MemoryMode readMode();
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bool init();
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uint8_t read(uint16_t addr);
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void write(uint16_t addr, uint8_t data);
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void writeRange(uint8_t data, uint16_t from, uint16_t to) ;
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bool verifyRange(uint8_t data, uint16_t from, uint16_t to);
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bool test();
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};
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struct MemoryCacheItem_t {
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uint16_t addr;
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uint8_t data;
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uint8_t ttl;
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bool valid;
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};
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typedef struct MemoryCacheItem_t MemoryCacheItem;
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class MemoryCache {
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MemoryCacheItem *cache = NULL;
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Memory *memory = NULL;
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uint8_t cacheElements = 0;
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public:
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MemoryCache(uint8_t cacheElements, Memory& memory);
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uint8_t getSize();
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MemoryCacheItem* getItem(uint8_t index);
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uint8_t read(uint16_t addr);
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void update(uint16_t addr, uint8_t data);
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void clear();
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};
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#endif //UVM_MEMORY_H
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