97 lines
2.3 KiB
C++
97 lines
2.3 KiB
C++
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#include <Arduino.h>
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#include <EEPROM.h>
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#include "cpu.h"
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#include "savestate.h"
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#include "hardcoded_state.h"
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void initEEPROM()
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{
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#if defined(ESP8266) || defined(ESP32)
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EEPROM.begin(1 + sizeof(cpu_state_t) + MEMORY_SIZE);
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#endif
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}
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bool validEEPROM()
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{
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return EEPROM.read(0) == EEPROM_MAGIC_NUMBER;
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}
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void loadStateFromEEPROM(cpu_state_t* cpuState)
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{
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cpu_get_state(cpuState);
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u4_t *memTemp = cpuState->memory;
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EEPROM.get(1, *cpuState);
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cpu_set_state(cpuState);
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uint32_t i = 0;
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for (i = 0; i < MEMORY_SIZE; i++)
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{
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memTemp[i] = EEPROM.read(1 + sizeof(cpu_state_t) + i);
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}
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#ifdef ENABLE_DUMP_STATE_TO_SERIAL_WHEN_START
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Serial.print(F("Loaded "));
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Serial.print(1 + sizeof(cpu_state_t) + MEMORY_SIZE);
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Serial.println(F(" bytes"));
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#endif
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}
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void eraseStateFromEEPROM() {
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for (uint32_t i = 0; i < EEPROM.length(); i++)
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EEPROM.write(i, 0);
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#if defined(ESP8266) || defined(ESP32)
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EEPROM.commit();
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#endif
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}
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void saveStateToEEPROM(cpu_state_t* cpuState)
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{
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uint32_t i = 0;
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if (EEPROM.read(0) != EEPROM_MAGIC_NUMBER)
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eraseStateFromEEPROM();
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#if defined(ESP8266) || defined(ESP32)
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EEPROM.write(0, EEPROM_MAGIC_NUMBER);
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#else
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EEPROM.update(0, EEPROM_MAGIC_NUMBER);
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#endif
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cpu_get_state(cpuState);
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EEPROM.put(1, *cpuState);
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for (i = 0; i < MEMORY_SIZE; i++)
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{
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#if defined(ESP8266) || defined(ESP32)
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EEPROM.write(1 + sizeof(cpu_state_t) + i, cpuState->memory[i]);
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#else
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EEPROM.update(1 + sizeof(cpu_state_t) + i, cpuState->memory[i]);
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#endif
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}
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#if defined(ESP8266) || defined(ESP32)
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EEPROM.commit();
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#endif
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#ifdef ENABLE_DUMP_STATE_TO_SERIAL_WHEN_START
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Serial.print(F("Saved "));
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Serial.print(1 + sizeof(cpu_state_t) + MEMORY_SIZE);
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Serial.println(F(" bytes"));
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#endif
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}
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void loadHardcodedState(cpu_state_t* cpuState)
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{
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cpu_get_state(cpuState);
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u4_t *memTemp = cpuState->memory;
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uint16_t i;
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uint8_t *cpuS = (uint8_t *)cpuState;
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for (i = 0; i < sizeof(cpu_state_t); i++)
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{
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cpuS[i] = pgm_read_byte_near(hardcodedState + i);
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}
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for (i = 0; i < MEMORY_SIZE; i++)
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{
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memTemp[i] = pgm_read_byte_near(hardcodedState + sizeof(cpu_state_t) + i);
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}
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cpuState->memory = memTemp;
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cpu_set_state(cpuState);
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Serial.println("Hardcoded");
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}
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