ESPTerm - ESP8266 terminal emulator. Branches: [master] patches, [work] next release
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espterm-firmware/user/persist.c

227 lines
5.8 KiB

//
// Created by MightyPork on 2017/07/09.
//
#include "persist.h"
#include <esp8266.h>
#include "wifimgr.h"
#include "screen.h"
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PersistBlock persist;
#define PERSIST_SECTOR_ID 0x3D
//region Persist and restore individual modules
static void ICACHE_FLASH_ATTR
apply_live_settings(void)
{
persist_dbg("[Persist] Applying live settings...");
persist_dbg("[Persist] > system");
sysconf_apply_settings();
persist_dbg("[Persist] > wifi");
wifimgr_apply_settings();
persist_dbg("[Persist] > terminal");
terminal_apply_settings();
persist_dbg("[Persist] Live settings applied.");
// ...
}
static void ICACHE_FLASH_ATTR
restore_live_settings_to_hard_defaults(void)
{
persist_dbg("[Persist] Restore to hard defaults...");
persist_dbg("[Persist] > system");
sysconf_restore_defaults();
persist_dbg("[Persist] > wifi");
wifimgr_restore_defaults();
persist_dbg("[Persist] > terminal");
terminal_restore_defaults();
persist_dbg("[Persist] Restored to hard defaults.");
// ...
}
//endregion
const u32 wconf_at = (u32)&persist.defaults.wificonf - (u32)&persist.defaults;
const u32 tconf_at = (u32)&persist.defaults.termconf - (u32)&persist.defaults;
const u32 sconf_at = (u32)&persist.defaults.sysconf - (u32)&persist.defaults;
const u32 cksum_at = (u32)&persist.defaults.checksum - (u32)&persist.defaults;
/**
* Compute CRC32. Adapted from https://github.com/esp8266/Arduino
* @param data
* @param length
* @return crc32
*/
static uint32_t ICACHE_FLASH_ATTR
calculateCRC32(const uint8_t *data, size_t length)
{
// the salt here should ensure settings are wiped when the structure changes
// CHECKSUM_SALT can be adjusted manually to force a reset.
uint32_t crc = 0xffffffff + CHECKSUM_SALT + ((wconf_at << 16) ^ (tconf_at << 10) ^ (sconf_at << 5));
while (length--) {
uint8_t c = *data++;
for (uint32_t i = 0x80; i > 0; i >>= 1) {
bool bit = (bool) (crc & 0x80000000UL);
if (c & i) {
bit = !bit;
}
crc <<= 1;
if (bit) {
crc ^= 0x04c11db7UL;
}
}
}
return crc;
}
/**
* Compute a persist bundle checksum
*
* @param bundle
* @return
*/
static uint32_t ICACHE_FLASH_ATTR
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compute_checksum(AppConfigBundle *bundle)
{
// this should be the bundle without the checksum
return calculateCRC32((uint8_t *) bundle, sizeof(AppConfigBundle) - 4);
}
static void ICACHE_FLASH_ATTR
set_admin_block_defaults(void)
{
persist_info("[Persist] Initing admin config block");
strcpy(persist.admin.pw, STR(ADMIN_PASSWORD));
persist.admin.version = ADMINCONF_VERSION;
}
/**
* Load, verify and apply persistent config
*/
void ICACHE_FLASH_ATTR
persist_load(void)
{
persist_info("[Persist] Loading settings from FLASH...");
persist_dbg("Persist memory map:");
persist_dbg("> wifi at %4d (error %2d)", wconf_at, wconf_at - 0);
persist_dbg("> sys at %4d (error %2d)", sconf_at, sconf_at - WIFICONF_SIZE);
persist_dbg("> term at %4d (error %2d)", tconf_at, tconf_at - WIFICONF_SIZE - SYSCONF_SIZE);
persist_dbg("> cksum at %4d (error %2d)", cksum_at, cksum_at - (APPCONF_SIZE - 4));
persist_dbg("> Total size = %d bytes (error %d)", sizeof(AppConfigBundle), APPCONF_SIZE - sizeof(AppConfigBundle));
bool hard_reset = false;
// Try to load
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hard_reset |= !system_param_load(PERSIST_SECTOR_ID, 0, &persist, sizeof(PersistBlock));
// Verify checksums
if (hard_reset ||
(compute_checksum(&persist.defaults) != persist.defaults.checksum) ||
(compute_checksum(&persist.current) != persist.current.checksum) ||
(persist.admin.version != 0 && (calculateCRC32((uint8_t *) &persist.admin, sizeof(AdminConfigBlock) - 4) != persist.admin.checksum))) {
error("[Persist] Checksum verification: FAILED");
hard_reset = true;
} else {
persist_info("[Persist] Checksum verification: PASSED");
}
if (hard_reset) {
// Zero all out
memset(&persist, 0, sizeof(PersistBlock));
persist_load_hard_default();
// write them also as defaults
memcpy(&persist.defaults, &persist.current, sizeof(AppConfigBundle));
// reset admin pw
set_admin_block_defaults();
persist_store();
// this also stores them to flash and applies to modules
} else {
if (persist.admin.version == 0) {
set_admin_block_defaults();
persist_store();
}
apply_live_settings();
}
persist_info("[Persist] All settings loaded and applied.");
}
void ICACHE_FLASH_ATTR
persist_store(void)
{
persist_info("[Persist] Storing all settings to FLASH...");
// Update checksums before write
persist.current.checksum = compute_checksum(&persist.current);
persist.defaults.checksum = compute_checksum(&persist.defaults);
persist.admin.checksum = calculateCRC32((uint8_t *) &persist.admin, sizeof(AdminConfigBlock) - 4);
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if (!system_param_save_with_protect(PERSIST_SECTOR_ID, &persist, sizeof(PersistBlock))) {
error("[Persist] Store to flash failed!");
}
persist_info("[Persist] All settings persisted.");
}
/**
* Restore to built-in defaults
*/
void ICACHE_FLASH_ATTR
persist_load_hard_default(void)
{
persist_info("[Persist] Restoring live settings to hard defaults...");
// Set live config to default values
restore_live_settings_to_hard_defaults();
persist_store();
persist_info("[Persist] Settings restored to hard defaults.");
apply_live_settings(); // apply
}
/**
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* Restore default settings & apply. also persists.
*/
void ICACHE_FLASH_ATTR
persist_restore_default(void)
{
persist_info("[Persist] Restoring live settings to stored defaults...");
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memcpy(&persist.current, &persist.defaults, sizeof(AppConfigBundle));
apply_live_settings();
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persist_store();
persist_info("[Persist] Settings restored to stored defaults.");
}
/**
* Store current settings as defaults & write to flash
*/
void ICACHE_FLASH_ATTR
persist_set_as_default(void)
{
persist_info("[Persist] Storing live settings as defaults..");
// current -> defaults
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memcpy(&persist.defaults, &persist.current, sizeof(AppConfigBundle));
persist_store();
persist_info("[Persist] Default settings updated.");
}