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https://github.com/MarlinFirmware/Marlin.git
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66d2b48b59
- Clean up the API to use a `static` class instance to adhere to Marlin convention - Add `const` position data access for read/write - Add Storage capacity to the interface
61 lines
1.5 KiB
C++
61 lines
1.5 KiB
C++
#ifdef __AVR__
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#include "../../inc/MarlinConfig.h"
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#if ENABLED(EEPROM_SETTINGS)
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#include "../persistent_store_api.h"
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bool PersistentStore::access_start() { return true; }
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bool PersistentStore::access_finish() { return true; }
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bool PersistentStore::write_data(int &pos, const uint8_t *value, size_t size, uint16_t *crc) {
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while (size--) {
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uint8_t * const p = (uint8_t * const)pos;
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uint8_t v = *value;
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// EEPROM has only ~100,000 write cycles,
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// so only write bytes that have changed!
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if (v != eeprom_read_byte(p)) {
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eeprom_write_byte(p, v);
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if (eeprom_read_byte(p) != v) {
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SERIAL_ECHO_START();
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SERIAL_ECHOLNPGM(MSG_ERR_EEPROM_WRITE);
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return true;
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}
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}
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crc16(crc, &v, 1);
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pos++;
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value++;
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};
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return false;
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}
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bool PersistentStore::read_data(int &pos, uint8_t* value, size_t size, uint16_t *crc, const bool writing/*=true*/) {
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do {
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uint8_t c = eeprom_read_byte((unsigned char*)pos);
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if (writing) *value = c;
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crc16(crc, &c, 1);
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pos++;
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value++;
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} while (--size);
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return false; // always assume success for AVR's
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}
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bool PersistentStore::write_data(const int pos, uint8_t* value, size_t size) {
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int data_pos = pos;
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uint16_t crc = 0;
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return write_data(data_pos, value, size, &crc);
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}
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bool PersistentStore::read_data(const int pos, uint8_t* value, size_t size) {
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int data_pos = pos;
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uint16_t crc = 0;
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return read_data(data_pos, value, size, &crc);
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}
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const size_t PersistentStore::capacity() {
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return E2END + 1;
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}
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#endif // EEPROM_SETTINGS
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#endif // __AVR__
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