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initial commit of save/load slot

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This commit is contained in:
Adam Wonak
2025-07-03 12:55:25 -07:00
parent d21c0a810f
commit c9c85e64ec
6 changed files with 160 additions and 90 deletions
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20
examples/Gravity/save_state.h
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@ -11,6 +11,9 @@ struct AppState;
const char SKETCH_NAME[] = "Gravity";
const byte SKETCH_VERSION = 6;
// Number of available save slots.
const byte MAX_SAVE_SLOTS = 16;
// Define the minimum amount of time between EEPROM writes.
static const unsigned long SAVE_DELAY_MS = 2000;
@ -23,6 +26,10 @@ class StateManager {
// Populate the AppState instance with values from EEPROM if they exist.
bool initialize(AppState& app);
// Load data from specified slot.
bool loadData(AppState& app, byte slot_index);
// Save data to specified slot.
void saveData(const AppState& app, byte slot_index);
// Reset AppState instance back to default values.
void reset(AppState& app);
// Call from main loop, check if state has changed and needs to be saved.
@ -30,11 +37,12 @@ class StateManager {
// Indicate that state has changed and we should save.
void markDirty();
private:
// This struct holds the data that identifies the firmware version.
struct Metadata {
char sketch_name[16];
byte version;
byte active_slot;
char sketch_name[16];
};
struct ChannelState {
byte base_clock_mod_index;
@ -57,11 +65,11 @@ class StateManager {
byte selected_pulse;
ChannelState channel_data[Gravity::OUTPUT_COUNT];
};
void _save(const AppState& app);
private:
bool _isDataValid();
void _saveState(const AppState& app);
void _saveMetadata();
void _save(const AppState& app, byte slot_index);
void _saveState(const AppState& app, byte slot_index);
void _saveMetadata(byte active_slot);
bool _isDirty;
unsigned long _lastChangeTime;