Why was the GPS Cube GPS datalogger changed to stopping logging when full?
This was done for technical reasons because the FLASH memory must be cycled for maximum life, while the queue pointers used to keep track of the data in a circular queue fashion had to be updated too often to give good FLASH memory endurance. For this reason EEPROM memory on the CPU chip was used because of its greater number of possible write cycles. However this meant writes to memory weren’t ‘atomic’ – they weren’t performed in a single operation so under unusual circumstances the EEPROM and FLASH could get out of sync causing data to be lost.
