90 lines
1.8 KiB
C
90 lines
1.8 KiB
C
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#include <stdint.h>
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#include <stddef.h>
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#pragma pack(push, 1)
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struct DeviceInfo {
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// The index where the measurement data starts in the eeprom storage
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uint16_t startIndex;
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// The time when the device was powered on (seconds since 1970)
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uint32_t deviceStartTime;
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};
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struct Measurement {
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uint16_t measurementIntervalsSinceDeviceStart;
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uint8_t temperature0;
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uint8_t temperature1;
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};
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#pragma pack(pop)
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constexpr size_t eepromTotalSize = 13350;
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constexpr uint16_t maxiumDeviceInfoCount = 10;
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constexpr uint16_t dataStorageStartIndex = sizeof(DeviceInfo) * maxiumDeviceInfoCount;
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constexpr uint16_t sizeOfMeasurement = sizeof(Measurement);
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class EEPROMInterface {
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public:
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bool isInitialized;
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/**
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* @brief Initialize the storage
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*
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*/
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EEPROMInterface();
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/**
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* @brief
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*
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*/
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uint8_t startNewDeviceSession();
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/**
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* @brief Remove all stored data
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*
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* @return true The data was deleted
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* @return false There was an error deleting the data
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*/
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bool clearAllData();
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bool writeData(uint8_t* data, uint16_t count);
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/**
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* @brief Free space in the buffer
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*
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* @param buffer
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* @param count
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* @return uint16_t The number
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*/
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uint16_t readData(uint8_t* buffer, uint16_t count);
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uint16_t getStoredByteCount();
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private:
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/**
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* @brief The index into the buffer where the next byte should be written
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*
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*/
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uint16_t writeIndex;
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/**
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* @brief The index into the buffer where the first byte is stored
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*
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*/
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uint16_t readIndex;
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/**
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* @brief Find the write index, the first zero byte after a non-zero byte
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*
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* @return uint16_t The write index
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*/
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uint16_t findEndIndex();
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uint16_t findStartIndex();
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};
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