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63 lines
2.1 KiB
63 lines
2.1 KiB
//
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// Created by MightyPork on 2017/07/09.
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//
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// There are 4 sets of settings.
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// - hard defaults - hardcoded in firmware, used for init defaults after flash or if stored data are corrupt
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// - defaults - persisted by privileged user
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// - current - persistent current config state, can be restored to defaults any time
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// - live - non-persistent settings valid only for the current runtime
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#ifndef ESP_VT100_FIRMWARE_PERSIST_H
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#define ESP_VT100_FIRMWARE_PERSIST_H
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#include "wifimgr.h"
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#include "screen.h"
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#include "syscfg.h"
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// Changing this could be used to force-erase the config area
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// after a firmware upgrade
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#define CHECKSUM_SALT 2
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#define APPCONF_SIZE 2048
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/** Struct for current or default settings */
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typedef struct { // the entire block should be 1024 bytes long (for compatibility across upgrades)
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WiFiConfigBundle wificonf;
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TerminalConfigBundle termconf;
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SystemConfigBundle sysconf;
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// --- Space for future settings ---
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// The size must be appropriately reduced each time something is added,
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// and boolean flags defaulting to 0 should be used to detect unpopulated
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// sections that must be restored to defaults on load.
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//
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// This ensures user settings are not lost each time they upgrade the firmware,
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// which would lead to a checksum mismatch if the structure was changed and
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// it grew to a different memory area.
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uint8_t filler[
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APPCONF_SIZE
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- sizeof(uint32_t) // checksum
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- sizeof(WiFiConfigBundle)
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- sizeof(TerminalConfigBundle)
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- sizeof(SystemConfigBundle)
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];
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uint32_t checksum; // computed before write and tested on load. If it doesn't match, values are reset to hard defaults.
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} AppConfigBundle;
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/** This is the entire data block stored in FLASH */
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typedef struct {
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AppConfigBundle defaults; // defaults are stored here
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AppConfigBundle current; // active settings adjusted by the user
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} PersistBlock;
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// Persist holds the data currently loaded from the flash
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extern PersistBlock persist;
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void persist_load(void);
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void persist_load_hard_default(void);
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void persist_restore_default(void);
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void persist_set_as_default(void);
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void persist_store(void);
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#endif //ESP_VT100_FIRMWARE_PERSIST_H
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