esp-idf/components/spi_flash/sim/SpiFlash.cpp

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// Copyright 2015-2017 Espressif Systems (Shanghai) PTE LTD
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
#include "SpiFlash.h"
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <fstream>
#include <iostream>
#include <vector>
#include <string>
#include "esp_flash_data_types.h"
using namespace std;
SpiFlash::SpiFlash()
{
return;
}
SpiFlash::~SpiFlash()
{
deinit();
}
void SpiFlash::init(size_t chip_size, size_t block_size, size_t sector_size, size_t page_size, const char* partitions_bin)
{
// De-initialize first
deinit();
this->chip_size = chip_size;
this->block_size = block_size;
this->sector_size = sector_size;
this->page_size = page_size;
this->memory = (uint8_t *) malloc(this->chip_size);
memset(this->memory, 0xFF, this->chip_size);
ifstream ifd(partitions_bin, ios::binary | ios::ate);
int size = ifd.tellg();
ifd.seekg(0, ios::beg);
vector<char> buffer;
buffer.resize(size);
ifd.read(buffer.data(), size);
memcpy(&this->memory[ESP_PARTITION_TABLE_ADDR], buffer.data(), buffer.size());
}
void SpiFlash::deinit()
{
if(inited)
{
free(this->memory);
}
}
size_t SpiFlash::get_chip_size()
{
return this->chip_size;
}
size_t SpiFlash::get_sector_size()
{
return this->sector_size;
}
esp_rom_spiflash_result_t SpiFlash::erase_block(uint32_t block)
{
memset(&this->memory[block * this->block_size], 0xFF, this->block_size);
return ESP_ROM_SPIFLASH_RESULT_OK;
}
esp_rom_spiflash_result_t SpiFlash::erase_sector(size_t sector)
{
memset(&this->memory[sector * this->sector_size], 0xFF, this->sector_size);
return ESP_ROM_SPIFLASH_RESULT_OK;
}
esp_rom_spiflash_result_t SpiFlash::erase_page(uint32_t page)
{
memset(&this->memory[page * this->page_size], 0xFF, this->page_size);
return ESP_ROM_SPIFLASH_RESULT_OK;
}
esp_rom_spiflash_result_t SpiFlash::write(size_t dest_addr, const void *src, size_t size)
{
// Emulate inability to set programmed bits without erasing
for(uint32_t ctr = 0; ctr < size; ctr++)
{
uint8_t data = ((uint8_t*)src)[ctr];
uint8_t written = this->memory[dest_addr + ctr];
data &= written;
this->memory[dest_addr + ctr] = data;
}
return ESP_ROM_SPIFLASH_RESULT_OK;
}
esp_rom_spiflash_result_t SpiFlash::read(size_t src_addr, void *dest, size_t size)
{
memcpy(dest, &this->memory[src_addr], size);
return ESP_ROM_SPIFLASH_RESULT_OK;
}
uint8_t* SpiFlash::get_memory_ptr(uint32_t src_address)
{
return &this->memory[src_address];
}