mxm_registry.c

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/**
 * @file    mxm_registry.c
 * @author  foxBMS Team
 * @date    2020-07-16 (date of creation)
 * @updated 2021-12-06 (date of last update)
 * @ingroup DRIVERS
 * @prefix  MXM
 *
 * @brief   Functions in order to have a registry of monitoring ICs
 *
 * @details Monitoring registry stores information about the connected ICs.
 *
 */
 
/*========== Includes =======================================================*/
#include "mxm_registry.h"
 
#include "foxmath.h"
 
/*========== Macros and Definitions =========================================*/
 
/** default value for status and fmea registers (for initialization) */
#define MXM_MON_REGISTRY_STATUS_FMEA_DEFAULT (0xFFFFu)
 
/** shift distance for one byte */
#define MXM_REGISTRY_SHIFT_ONE_BYTE (8u)
 
/*========== Static Constant and Variable Definitions =======================*/
 
/*========== Extern Constant and Variable Definitions =======================*/
 
/*========== Static Function Prototypes =====================================*/
 
/*========== Static Function Implementations ================================*/
 
/*========== Extern Function Implementations ================================*/
extern void MXM_MonRegistryInit(MXM_MONITORING_INSTANCE_s *pState) {
    FAS_ASSERT(pState != NULL_PTR);
    for (uint8_t i = 0; i < MXM_MAXIMUM_NR_OF_MODULES; i++) {
        MXM_REGISTRY_ENTRY_s *entry = &pState->registry[i];
        entry->connected            = false;
        entry->deviceAddress        = 0u;
        entry->deviceID             = 0u;
        entry->model                = MXM_MODEL_ID_NONE;
        entry->siliconVersion       = MXM_siliconVersion_0;
        entry->registerStatus1      = MXM_MON_REGISTRY_STATUS_FMEA_DEFAULT;
        entry->registerStatus2      = MXM_MON_REGISTRY_STATUS_FMEA_DEFAULT;
        entry->registerStatus3      = MXM_MON_REGISTRY_STATUS_FMEA_DEFAULT;
        entry->registerFmea1        = MXM_MON_REGISTRY_STATUS_FMEA_DEFAULT;
        entry->registerFmea2        = MXM_MON_REGISTRY_STATUS_FMEA_DEFAULT;
    }
}
 
extern STD_RETURN_TYPE_e MXM_MonRegistryConnectDevices(MXM_MONITORING_INSTANCE_s *pState, uint8_t numberOfDevices) {
    FAS_ASSERT(pState != NULL_PTR);
    STD_RETURN_TYPE_e retval = STD_OK;
    if (numberOfDevices > MXM_MAXIMUM_NR_OF_MODULES) {
        retval = STD_NOT_OK;
    } else {
        for (uint8_t i = 0; i < numberOfDevices; i++) {
            pState->registry[i].connected     = true;
            pState->registry[i].deviceAddress = HELLOALL_START_SEED + i;
            pState->highest5xDevice           = HELLOALL_START_SEED + i;
        }
    }
 
    return retval;
}
 
/* AXIVION Next Line Style MisraC2012-8.7: this function is API of the registry and should therefore be extern */
extern uint8_t MXM_MonRegistryGetHighestConnected5XDevice(const MXM_MONITORING_INSTANCE_s *const kpkState) {
    FAS_ASSERT(kpkState != NULL_PTR);
    /* return highest connected device */
    return kpkState->highest5xDevice;
}
 
extern void MXM_MonRegistryParseIdIntoDevices(
    MXM_MONITORING_INSTANCE_s *pState,
    uint8_t rxBufferLength,
    MXM_REG_NAME_e type) {
    FAS_ASSERT(pState != NULL_PTR);
    FAS_ASSERT(rxBufferLength <= MXM_RX_BUFFER_LENGTH);
    /* only ID1 or ID2 are valid */
    FAS_ASSERT((type == MXM_REG_ID1) || (type == MXM_REG_ID2));
 
    /* find highest connected device */
    const uint8_t highestConnectedDevice =
        MATH_MinimumOfTwoUint8_t(MXM_MonRegistryGetHighestConnected5XDevice(pState), MXM_MAXIMUM_NR_OF_MODULES);
 
    const uint8_t startBytes = 2u;
 
    for (uint8_t i = 0; i <= highestConnectedDevice; i++) {
        const uint8_t bufferPosition        = startBytes + (i * 2u);
        MXM_REGISTRY_ENTRY_s *currentDevice = &pState->registry[highestConnectedDevice - i];
        FAS_ASSERT((bufferPosition + 1u) <= rxBufferLength);
        uint16_t id = 0;
        MXM_ExtractValueFromRegister(
            pState->rxBuffer[bufferPosition], pState->rxBuffer[bufferPosition + 1u], MXM_BM_WHOLE_REG, &id);
        if (type == MXM_REG_ID1) {
            currentDevice->deviceID = id;
        } else {
            /* intended condition: type is MXM_REG_ID2 */
            currentDevice->deviceID = ((uint32_t)id << 16u) | currentDevice->deviceID;
        }
    }
}
 
extern void MXM_MonRegistryParseVersionIntoDevices(MXM_MONITORING_INSTANCE_s *pState, uint8_t rxBufferLength) {
    FAS_ASSERT(pState != NULL_PTR);
    FAS_ASSERT(pState->rxBuffer != NULL_PTR);
    FAS_ASSERT(rxBufferLength <= MXM_RX_BUFFER_LENGTH);
 
    /* find highest connected device */
    const uint8_t highestConnectedDevice =
        MATH_MinimumOfTwoUint8_t(MXM_MonRegistryGetHighestConnected5XDevice(pState), MXM_MAXIMUM_NR_OF_MODULES);
 
    for (uint8_t i = 0; i <= highestConnectedDevice; i++) {
        const uint8_t startBytes            = 2u;
        const uint8_t bufferPosition        = startBytes + (i * 2u);
        MXM_REGISTRY_ENTRY_s *currentDevice = &pState->registry[highestConnectedDevice - i];
        FAS_ASSERT((bufferPosition + 1u) <= rxBufferLength);
        uint16_t model = 0;
        MXM_ExtractValueFromRegister(
            pState->rxBuffer[bufferPosition], pState->rxBuffer[bufferPosition + 1u], MXM_REG_VERSION_MOD, &model);
        if (model >= (uint16_t)MXM_MODEL_ID_invalid) {
            currentDevice->model = MXM_MODEL_ID_invalid;
        } else if (
            (model != (uint16_t)MXM_MODEL_ID_MAX17852) && (model != (uint16_t)MXM_MODEL_ID_MAX17853) &&
            (model != (uint16_t)MXM_MODEL_ID_MAX17854)) {
            currentDevice->model = MXM_MODEL_ID_invalid;
        } else {
            /* AXIVION Next Line Style MisraC2012-10.5: All invalid values have been cleared. */
            currentDevice->model = (MXM_MODEL_ID_e)model;
        }
 
        uint16_t version = 0;
        MXM_ExtractValueFromRegister(
            pState->rxBuffer[bufferPosition], pState->rxBuffer[bufferPosition + 1u], MXM_REG_VERSION_VER, &version);
        if (version >= (uint16_t)MXM_siliconVersion_invalid) {
            currentDevice->siliconVersion = MXM_siliconVersion_invalid;
        } else {
            /* AXIVION Next Line Style MisraC2012-10.5: All invalid values have been cleared. */
            currentDevice->siliconVersion = (MXM_siliconVersion_e)version;
        }
    }
}
 
extern void MXM_MonRegistryParseStatusFmeaIntoDevices(MXM_MONITORING_INSTANCE_s *pState, uint8_t rxBufferLength) {
    FAS_ASSERT(pState != NULL_PTR);
    FAS_ASSERT(pState->rxBuffer != NULL_PTR);
    FAS_ASSERT(rxBufferLength <= MXM_RX_BUFFER_LENGTH);
 
    /* find highest connected device */
    const uint8_t highestConnectedDevice =
        MATH_MinimumOfTwoUint8_t(MXM_MonRegistryGetHighestConnected5XDevice(pState), MXM_MAXIMUM_NR_OF_MODULES);
 
    /* detect which register has been read */
    const uint8_t currentRegister = pState->rxBuffer[1u];
 
    for (uint8_t i = 0; i <= highestConnectedDevice; i++) {
        const uint8_t startBytes            = 2u;
        const uint8_t bufferPosition        = startBytes + (i * 2u);
        MXM_REGISTRY_ENTRY_s *currentDevice = &pState->registry[highestConnectedDevice - i];
        FAS_ASSERT((bufferPosition + 1u) <= rxBufferLength);
        uint16_t registerValue = 0u;
        MXM_ExtractValueFromRegister(
            pState->rxBuffer[bufferPosition], pState->rxBuffer[bufferPosition + 1u], MXM_BM_WHOLE_REG, &registerValue);
 
        switch (currentRegister) {
            case (uint8_t)MXM_REG_STATUS1:
                currentDevice->registerStatus1 = registerValue;
                break;
            case (uint8_t)MXM_REG_STATUS2:
                currentDevice->registerStatus2 = registerValue;
                break;
            case (uint8_t)MXM_REG_STATUS3:
                currentDevice->registerStatus3 = registerValue;
                break;
            case (uint8_t)MXM_REG_FMEA1:
                currentDevice->registerFmea1 = registerValue;
                break;
            case (uint8_t)MXM_REG_FMEA2:
                currentDevice->registerFmea2 = registerValue;
                break;
            default:
                /* unknown register, just discard */
                break;
        }
    }
}
 
extern bool MXM_CheckIfADeviceHasBeenReset(const MXM_MONITORING_INSTANCE_s *const kpkState) {
    FAS_ASSERT(kpkState != NULL_PTR);
 
    /* find highest connected device */
    const uint8_t highestConnectedDevice =
        MATH_MinimumOfTwoUint8_t(MXM_MonRegistryGetHighestConnected5XDevice(kpkState), MXM_MAXIMUM_NR_OF_MODULES);
 
    bool deviceReset = false;
 
    for (uint8_t i = 0; i <= highestConnectedDevice; i++) {
        const uint16_t status1 = kpkState->registry[i].registerStatus1;
        const uint8_t lsb      = (uint8_t)(status1 & MXM_BM_LSB);
        const uint8_t msb      = (uint8_t)((status1 & MXM_BM_MSB) >> MXM_REGISTRY_SHIFT_ONE_BYTE);
        uint16_t alertReset    = 0u;
        MXM_ExtractValueFromRegister(lsb, msb, MXM_REG_STATUS1_ALRTRST, &alertReset);
        if (alertReset == 1u) {
            deviceReset = true;
        }
    }
 
    return deviceReset;
}
 
extern bool MXM_CheckIfADeviceIsConnected(const MXM_MONITORING_INSTANCE_s *const kpkState, uint8_t device) {
    FAS_ASSERT(kpkState != NULL_PTR);
    FAS_ASSERT(device < MXM_MAXIMUM_NR_OF_MODULES);
    return kpkState->registry[device].connected;
}
 
/*========== Externalized Static Function Implementations (Unit Test) =======*/