database_helper.c

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/**
 * @file    database_helper.c
 * @author  foxBMS Team
 * @date    2021-05-05 (date of creation)
 * @updated 2021-06-09 (date of last update)
 * @ingroup ENGINE
 * @prefix  DATA
 *
 * @brief   Database helper implementation
 *
 * @details Implementation of database helper function
 */
 
/*========== Includes =======================================================*/
#include "database_helper.h"
 
#include "battery_system_cfg.h"
 
#include "os.h"
 
/*========== Macros and Definitions =========================================*/
 
/*========== Static Constant and Variable Definitions =======================*/
 
/*========== Extern Constant and Variable Definitions =======================*/
 
/*========== Static Function Prototypes =====================================*/
 
/*========== Static Function Implementations ================================*/
 
/*========== Extern Function Implementations ================================*/
extern bool DATA_DatabaseEntryUpdatedAtLeastOnce(DATA_BLOCK_HEADER_s dataBlockHeader) {
    bool retval = false;
    if (!((dataBlockHeader.timestamp == 0u) && (dataBlockHeader.previousTimestamp == 0u))) {
        /* Only possibility for timestamp AND previous timestamp to be 0 is, if
           the database entry has never been updated. Thus if this is not the
           case the database entry must have been updated */
        retval = true;
    }
    return retval;
}
 
extern bool DATA_EntryUpdatedWithinInterval(DATA_BLOCK_HEADER_s dataBlockHeader, uint32_t timeInterval) {
    bool retval               = false;
    uint32_t currentTimestamp = OS_GetTickCount();
 
    /* Unsigned integer arithmetic also works correctly if currentTimestap is
       larger than pHeader->timestamp (timer overflow), thus no need to use abs() */
    const uint32_t timeDifferenceLastCall = currentTimestamp - dataBlockHeader.timestamp;
    const bool updatedAtLeastOnce         = DATA_DatabaseEntryUpdatedAtLeastOnce(dataBlockHeader);
    if ((timeDifferenceLastCall <= timeInterval) && (updatedAtLeastOnce == true)) {
        /* Difference between current timestamp and last update timestamp is
           smaller than passed time interval */
        retval = true;
    }
    return retval;
}
 
extern bool DATA_EntryUpdatedPeriodicallyWithinInterval(DATA_BLOCK_HEADER_s dataBlockHeader, uint32_t timeInterval) {
    bool retval                     = false;
    const uint32_t currentTimestamp = OS_GetTickCount();
 
    /* Unsigned integer arithmetic also works correctly if currentTimestap is
       smaller than dataBlockHeader.timestamp (timer overflow), thus no need to use abs() */
    const uint32_t timeDifferenceLastCall     = currentTimestamp - dataBlockHeader.timestamp;
    const uint32_t timeDifferenceBetweenCalls = dataBlockHeader.timestamp - dataBlockHeader.previousTimestamp;
 
    if ((timeDifferenceLastCall <= timeInterval) && (timeDifferenceBetweenCalls <= timeInterval) &&
        (DATA_DatabaseEntryUpdatedAtLeastOnce(dataBlockHeader) == true)) {
        /* Difference between timestamps is smaller than passed time interval */
        retval = true;
    }
    return retval;
}
 
extern uint8_t DATA_GetStringNumberFromVoltageIndex(uint16_t cellIndex) {
    FAS_ASSERT(cellIndex < (BS_NR_OF_BAT_CELLS * BS_NR_OF_STRINGS));
    return (uint8_t)(cellIndex / BS_NR_OF_BAT_CELLS);
}
 
extern uint8_t DATA_GetModuleNumberFromVoltageIndex(uint16_t cellIndex) {
    FAS_ASSERT(cellIndex < (BS_NR_OF_BAT_CELLS * BS_NR_OF_STRINGS));
    uint8_t stringNumber = DATA_GetStringNumberFromVoltageIndex(cellIndex);
    uint8_t moduleNumber = (uint8_t)((cellIndex / BS_NR_OF_CELLS_PER_MODULE) - (stringNumber * BS_NR_OF_MODULES));
    return moduleNumber;
}
 
extern uint8_t DATA_GetCellNumberFromVoltageIndex(uint16_t cellIndex) {
    FAS_ASSERT(cellIndex < (BS_NR_OF_BAT_CELLS * BS_NR_OF_STRINGS));
    return (uint8_t)(cellIndex % BS_NR_OF_CELLS_PER_MODULE);
}
 
extern uint8_t DATA_GetStringNumberFromTemperatureIndex(uint16_t sensorIndex) {
    FAS_ASSERT(sensorIndex < BS_NR_OF_TEMP_SENSORS);
    return (uint8_t)(sensorIndex / BS_NR_OF_TEMP_SENSORS_PER_STRING);
}
 
extern uint8_t DATA_GetModuleNumberFromTemperatureIndex(uint16_t sensorIndex) {
    FAS_ASSERT(sensorIndex < BS_NR_OF_TEMP_SENSORS);
    uint8_t stringNumber = DATA_GetStringNumberFromTemperatureIndex(sensorIndex);
    uint8_t moduleNumber =
        (uint8_t)((sensorIndex / BS_NR_OF_TEMP_SENSORS_PER_MODULE) - (stringNumber * BS_NR_OF_MODULES));
    return moduleNumber;
}
 
extern uint8_t DATA_GetSensorNumberFromTemperatureIndex(uint16_t sensorIndex) {
    FAS_ASSERT(sensorIndex < BS_NR_OF_TEMP_SENSORS);
    return (uint8_t)(sensorIndex % BS_NR_OF_TEMP_SENSORS_PER_MODULE);
}
 
/*========== Externalized Static Function Implementations (Unit Test) =======*/