a8000_subboard_sdk/components/flash/znvs.cpp

#include "znvs.hpp"

#include <string.h>

#include "zsimple_flash.hpp"

using namespace iflytop;
using namespace std;

#define TAG    "ZNVS"
#define MARK_S 0x12345678
#define MARK_E 0x87654321

ZNVS& ZNVS::ins() {
  static ZNVS s_ins;
  return s_ins;
}

void ZNVS::initialize(int32_t flash_sector) { zsimple_flash_init(flash_sector); }
bool ZNVS::alloc_config(const char* key, uint8_t* data, size_t datalen) {
  ZASSERT(m_index_num < ZARRAY_SIZE(m_index));
  m_index[m_index_num].name       = key;
  m_index[m_index_num].len        = datalen;
  m_index[m_index_num].defaultval = data;
  m_index_num++;
  return true;
}
bool ZNVS::init_config() {
  int configtotallen = 0;
  for (int i = 0; i < m_index_num; i++) {
    configtotallen += m_index[i].len;
  }
  configtotallen = configtotallen + sizeof(config_t) /*head*/ + 4 /*tail*/;

  m_cfgcache = (config_t*)malloc(configtotallen);
  ZASSERT(m_cfgcache);
  m_cfgcachesize = configtotallen;

  zsimple_flash_read((uint8_t*)m_cfgcache, m_cfgcachesize);
  if (m_cfgcache->config_start != MARK_S || m_cfgcache->data_size != (m_cfgcachesize - sizeof(config_t))) {
    ZLOGW(TAG, "config uninitialized, initialize it");
    memset(m_cfgcache, 0, m_cfgcachesize);
    m_cfgcache->config_start = MARK_S;
    m_cfgcache->data_size    = m_cfgcachesize - sizeof(config_t);
    flush_all_to_configcache();
    zsimple_flash_write((uint8_t*)m_cfgcache, m_cfgcachesize);
  } else {
    ZLOGI(TAG, "config initialized successfully");
  }
  inited = true;
  return true;
}

void ZNVS::flush_all_to_configcache() {
  for (int i = 0; i < m_index_num; i++) {
    memcpy(m_cfgcache->data, m_index[i].defaultval, m_index[i].len);
  }
}

bool ZNVS::get_config(const char* key, uint8_t* data, size_t len) {
  ZASSERT(inited);
  int dataoffset = 0;
  for (int i = 0; i < m_index_num; i++) {
    if (strcmp(m_index[i].name, key) == 0) {
      ZASSERT(len == m_index[i].len);
      memcpy(data, m_cfgcache->data + dataoffset, m_index[i].len);
      return true;
    }
    dataoffset += m_index[i].len;
  }
  return false;
}
bool ZNVS::set_config(const char* key, uint8_t* data, size_t len) {
  ZASSERT(inited);
  int dataoffset = 0;
  for (int i = 0; i < m_index_num; i++) {
    if (strcmp(m_index[i].name, key) == 0) {
      memcpy(m_cfgcache->data + dataoffset, data, len);
      return true;
    }
    dataoffset += m_index[i].len;
  }
  return false;
}
void ZNVS::flush() {
  ZLOGI(TAG, "flush config to flash");
  zsimple_flash_write((uint8_t*)m_cfgcache, m_cfgcachesize);
  ZLOGI(TAG, "flush config to flash done");
}