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FIX: Library does not work with small (2-16Kbits) eeprom devices #11

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Merged
merged 1 commit into from
Jan 7, 2022
Merged

FIX: Library does not work with small (2-16Kbits) eeprom devices #11

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6 changes: 4 additions & 2 deletions src/SparkFun_External_EEPROM.cpp
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Original file line number Diff line number Diff line change
Expand Up @@ -161,7 +161,8 @@ void ExternalEEPROM::read(uint32_t eepromLocation, uint8_t *buff, uint16_t buffe
delayMicroseconds(100); //This shortens the amount of time waiting between writes but hammers the I2C bus

settings.i2cPort->beginTransmission(i2cAddress);
settings.i2cPort->write((uint8_t)((eepromLocation + received) >> 8)); // MSB
if(getMemorySize() > 2048)
settings.i2cPort->write((uint8_t)((eepromLocation + received) >> 8)); // MSB
settings.i2cPort->write((uint8_t)((eepromLocation + received) & 0xFF)); // LSB
settings.i2cPort->endTransmission();

Expand Down Expand Up @@ -225,7 +226,8 @@ void ExternalEEPROM::write(uint32_t eepromLocation, const uint8_t *dataToWrite,
delayMicroseconds(100); //This shortens the amount of time waiting between writes but hammers the I2C bus

settings.i2cPort->beginTransmission(i2cAddress);
settings.i2cPort->write((uint8_t)((eepromLocation + recorded) >> 8)); // MSB
if(getMemorySize() > 2048)
settings.i2cPort->write((uint8_t)((eepromLocation + recorded) >> 8)); // MSB
settings.i2cPort->write((uint8_t)((eepromLocation + recorded) & 0xFF)); // LSB
for (uint8_t x = 0; x < amtToWrite; x++)
settings.i2cPort->write(dataToWrite[recorded + x]);
Expand Down