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[STM32F1] Simpler Flash EEPROM (#14829)

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This commit is contained in:
Eric Ptak
2019-08-11 02:14:31 +02:00
committed by Scott Lahteine
parent 0745d48993
commit 9c5086e6af
3 changed files with 21 additions and 48 deletions
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36
Marlin/src/HAL/HAL_STM32F1/persistent_store_flash.cpp
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@ -42,7 +42,6 @@
// Store settings in the last two pages
// Flash pages must be erased before writing, so keep track.
bool firstWrite = false;
uint32_t pageBase = EEPROM_START_ADDRESS;
bool PersistentStore::access_start() {
firstWrite = true;
@ -67,42 +66,27 @@ bool PersistentStore::write_data(int &pos, const uint8_t *value, size_t size, ui
firstWrite = false;
}
// First write full words
int i = 0;
int wordsToWrite = size / sizeof(uint16_t);
uint16_t* wordBuffer = (uint16_t *)value;
while (wordsToWrite) {
status = FLASH_ProgramHalfWord(pageBase + pos + (i * 2), wordBuffer[i]);
if (status != FLASH_COMPLETE) return true;
wordsToWrite--;
i++;
}
// Now, write any remaining single byte
const uint16_t odd = size & 1;
if (odd) {
uint16_t temp = value[size - 1];
status = FLASH_ProgramHalfWord(pageBase + pos + i, temp);
if (status != FLASH_COMPLETE) return true;
for (size_t i = 0; i < size; i++) {
if (FLASH_ProgramHalfWord(EEPROM_PAGE0_BASE + (pos + i) * 2, value[i]) != FLASH_COMPLETE)
return true;
}
crc16(crc, value, size);
pos += size + odd;
pos += size;
return false;
}
bool PersistentStore::read_data(int &pos, uint8_t* value, const size_t size, uint16_t *crc, const bool writing/*=true*/) {
for (uint16_t i = 0; i < size; i++) {
byte* accessPoint = (byte*)(pageBase + pos + i);
uint8_t c = *accessPoint;
if (writing) value[i] = c;
crc16(crc, &c, 1);
for (size_t i = 0; i < size; i++) {
uint8_t v = *(uint16_t *)(EEPROM_PAGE0_BASE + (pos + i) * 2);
if (writing) value[i] = v;
crc16(crc, &v, 1);
}
pos += ((size + 1) & ~1); // i.e., size+(size&1), round up odd values
pos += size;
return false;
}
size_t PersistentStore::capacity() { return E2END + 1; }
size_t PersistentStore::capacity() { return size_t(E2END + 1); }
#endif // EEPROM_SETTINGS && EEPROM FLASH
#endif // __STM32F1__