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 "sdkconfig.h"
#include "esp_flash_partitions.h"
using namespace std;
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#define DIV_AND_CEIL(x, y) ((x) / (y) + ((x) % (y) > 0))
SpiFlash::SpiFlash()
{
return;
}
SpiFlash::~SpiFlash()
{
deinit();
}
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void SpiFlash::init(uint32_t chip_size, uint32_t block_size, uint32_t sector_size, uint32_t page_size, const char* partitions_bin)
{
// De-initialize first
deinit();
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// Initialize values and alloc memory
this->chip_size = chip_size;
this->block_size = block_size;
this->sector_size = sector_size;
this->page_size = page_size;
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this->blocks = DIV_AND_CEIL(this->chip_size, this->block_size);
this->sectors = DIV_AND_CEIL(this->chip_size, this->sector_size);
this->pages = DIV_AND_CEIL(this->chip_size, this->page_size);
this->erase_cycles = (uint32_t*) calloc(this->sectors, sizeof(uint32_t));
this->erase_states = (bool*) calloc(this->sectors, sizeof(bool));
memset(this->erase_states, 0xFF, this->sectors * sizeof(bool));
this->total_erase_cycles_limit = 0;
this->erase_cycles_limit = 0;
this->total_erase_cycles = 0;
// Load partitions table bin
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[CONFIG_PARTITION_TABLE_OFFSET], buffer.data(), buffer.size());
}
void SpiFlash::deinit()
{
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// Free all allocated memory
free(this->memory);
free(this->erase_cycles);
free(this->erase_states);
}
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uint32_t SpiFlash::get_chip_size()
{
return this->chip_size;
}
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uint32_t SpiFlash::get_block_size()
{
return this->block_size;
}
uint32_t SpiFlash::get_sector_size()
{
return this->sector_size;
}
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uint32_t SpiFlash::get_page_size()
{
return this->page_size;
}
esp_rom_spiflash_result_t SpiFlash::erase_block(uint32_t block)
{
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uint32_t sectors_per_block = (this->block_size / this->sector_size);
uint32_t start_sector = block * sectors_per_block;
for (int i = start_sector; i < start_sector + sectors_per_block; i++) {
this->erase_sector(i);
}
return ESP_ROM_SPIFLASH_RESULT_OK;
}
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esp_rom_spiflash_result_t SpiFlash::erase_sector(uint32_t sector)
{
if (this->total_erase_cycles_limit != 0 &&
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this->total_erase_cycles >= this->total_erase_cycles_limit) {
return ESP_ROM_SPIFLASH_RESULT_ERR;
}
if (this->erase_cycles_limit != 0 &&
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this->erase_cycles[sector] >= this->erase_cycles_limit) {
return ESP_ROM_SPIFLASH_RESULT_ERR;
}
uint32_t pages_per_sector = (this->sector_size / this->page_size);
uint32_t start_page = sector * pages_per_sector;
if (this->erase_states[sector]) {
goto out;
}
for (int i = start_page; i < start_page + pages_per_sector; i++) {
this->erase_page(i);
}
this->erase_cycles[sector]++;
this->total_erase_cycles++;
this->erase_states[sector] = true;
out:
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;
}
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esp_rom_spiflash_result_t SpiFlash::write(uint32_t dest_addr, const void *src, uint32_t size)
{
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// Update reset states and check for failure
int start = 0;
int end = 0;
if (this->total_erase_cycles_limit != 0 &&
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this->total_erase_cycles >= this->total_erase_cycles_limit) {
return ESP_ROM_SPIFLASH_RESULT_ERR;
}
start = dest_addr / this->get_sector_size();
end = size > 0 ? (dest_addr + size - 1) / this->get_sector_size() : start;
for (int i = start; i <= end; i++) {
if (this->erase_cycles_limit != 0 &&
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this->erase_cycles[i] >= this->erase_cycles_limit) {
return ESP_ROM_SPIFLASH_RESULT_ERR;
}
this->erase_states[i] = false;
}
// Do the write
for(uint32_t ctr = 0; ctr < size; ctr++)
{
uint8_t data = ((uint8_t*)src)[ctr];
uint8_t written = this->memory[dest_addr + ctr];
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// Emulate inability to set programmed bits without erasing
data &= written;
this->memory[dest_addr + ctr] = data;
}
return ESP_ROM_SPIFLASH_RESULT_OK;
}
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esp_rom_spiflash_result_t SpiFlash::read(uint32_t src_addr, void *dest, uint32_t size)
{
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// Check for failure
int start = 0;
int end = 0;
if (this->total_erase_cycles_limit != 0 &&
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this->total_erase_cycles >= this->total_erase_cycles_limit) {
return ESP_ROM_SPIFLASH_RESULT_ERR;
}
start = src_addr / this->get_sector_size();
end = size > 0 ? (src_addr + size - 1) / this->get_sector_size() : start;
for (int i = start; i <= end; i++) {
if (this->erase_cycles_limit != 0 &&
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this->erase_cycles[i] >= this->erase_cycles_limit) {
return ESP_ROM_SPIFLASH_RESULT_ERR;
}
}
// Do the read
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];
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}
uint32_t SpiFlash::get_erase_cycles(uint32_t sector)
{
return this->erase_cycles[sector];
}
uint32_t SpiFlash::get_total_erase_cycles()
{
return this->total_erase_cycles;
}
void SpiFlash::set_erase_cycles_limit(uint32_t limit)
{
this->erase_cycles_limit = limit;
}
void SpiFlash::set_total_erase_cycles_limit(uint32_t limit)
{
this->total_erase_cycles_limit = limit;
}
void SpiFlash::reset_erase_cycles()
{
memset(this->erase_cycles, 0, sizeof(this->sectors * sizeof(uint32_t)));
}
void SpiFlash::reset_total_erase_cycles()
{
this->total_erase_cycles = 0;
}