can_cbs_tx_voltage.c

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/**
 * @file    can_cbs_tx_voltage.c
 * @author  foxBMS Team
 * @date    2021-04-20 (date of creation)
 * @updated 2021-07-29 (date of last update)
 * @ingroup DRIVER
 * @prefix  CAN
 *
 * @brief   CAN driver Tx callback implementation
 * @details CAN Tx callback for cell voltages
 */
 
/*========== Includes =======================================================*/
#include "can_cbs.h"
#include "can_helper.h"
 
/*========== Macros and Definitions =========================================*/
 
/*========== Static Constant and Variable Definitions =======================*/
/** the number of voltages per message-frame */
#define NUMBER_OF_MUX_VOLTAGES_PER_MESSAGE (4u)
 
/**
 * CAN signals used in this message
 * Parameters:
 * bit start, bit length, factor, offset, minimum value, maximum value
 */
static const CAN_SIGNAL_TYPE_s cellVoltageMultiplexer  = {7u, 8u, 1.0f, 0.0f, 0.0f, 1.0f};
static const CAN_SIGNAL_TYPE_s cellVoltage0InvalidFlag = {12u, 1u, 1.0f, 0.0f, 0.0f, 1.0f};
static const CAN_SIGNAL_TYPE_s cellVoltage1InvalidFlag = {13u, 1u, 1.0f, 0.0f, 0.0f, 1.0f};
static const CAN_SIGNAL_TYPE_s cellVoltage2InvalidFlag = {14u, 1u, 1.0f, 0.0f, 0.0f, 1.0f};
static const CAN_SIGNAL_TYPE_s cellVoltage3InvalidFlag = {15u, 1u, 1.0f, 0.0f, 0.0f, 1.0f};
static const CAN_SIGNAL_TYPE_s cellVoltage0_mV         = {11u, 13u, 1.0f, 0.0f, 0.0f, 8192.0f};
static const CAN_SIGNAL_TYPE_s cellVoltage1_mV         = {30u, 13u, 1.0f, 0.0f, 0.0f, 8192.0f};
static const CAN_SIGNAL_TYPE_s cellVoltage2_mV         = {33u, 13u, 1.0f, 0.0f, 0.0f, 8192.0f};
static const CAN_SIGNAL_TYPE_s cellVoltage3_mV         = {52u, 13u, 1.0f, 0.0f, 0.0f, 8192.0f};
 
/*========== Extern Constant and Variable Definitions =======================*/
 
/*========== Static Function Prototypes =====================================*/
/**
 * @brief Helper function for CAN_TxVoltage()
 *
 * Used in the CAN_TxVoltage() callback to set
 * invalid flag data and voltage data
 * in the CAN frame.
 *
 * @param[in] muxId                          multiplexer value
 * @param[in] pMessage                       pointer to CAN frame data
 * @param[in] cellVoltageSignal              signal characteristics for voltage data
 * @param[in] cellVoltageInvalidFlagSignal   signal characteristics for invalid flag data
 * @param[in] endianness                     big or little endianness of data
 * @param[in] kpkCanShim                     shim to the database entries
 */
static void CAN_TxVoltageSetData(
    uint8_t muxId,
    uint64_t *pMessage,
    CAN_SIGNAL_TYPE_s cellVoltageSignal,
    CAN_SIGNAL_TYPE_s cellVoltageInvalidFlagSignal,
    CAN_ENDIANNESS_e endianness,
    const CAN_SHIM_s *const kpkCanShim);
 
/*========== Static Function Implementations ================================*/
 
static void CAN_TxVoltageSetData(
    uint8_t muxId,
    uint64_t *pMessage,
    CAN_SIGNAL_TYPE_s cellVoltageSignal,
    CAN_SIGNAL_TYPE_s cellVoltageInvalidFlagSignal,
    CAN_ENDIANNESS_e endianness,
    const CAN_SHIM_s *const kpkCanShim) {
    /* cell index must not be greater than the number of cells */
    if (muxId < (BS_NR_OF_BAT_CELLS * BS_NR_OF_STRINGS)) {
        /* Get string, module and cell number */
        const uint8_t stringNumber = DATA_GetStringNumberFromVoltageIndex(muxId);
        const uint8_t moduleNumber = DATA_GetModuleNumberFromVoltageIndex(muxId);
        const uint8_t cellNumber   = DATA_GetCellNumberFromVoltageIndex(muxId);
 
        uint32_t signalData_valid = 0u;
        /* Valid bits data */
        if ((kpkCanShim->pTableCellVoltage->invalidCellVoltage[stringNumber][moduleNumber] & (0x01u << cellNumber)) ==
            0u) {
            signalData_valid = 0u;
        } else {
            signalData_valid = 1u;
        }
        /* Set valid bit data in CAN frame */
        CAN_TxSetMessageDataWithSignalData(
            pMessage,
            cellVoltageInvalidFlagSignal.bitStart,
            cellVoltageInvalidFlagSignal.bitLength,
            signalData_valid,
            endianness);
 
        /*Voltage data */
        float signalData_mV =
            (float)(kpkCanShim->pTableCellVoltage
                        ->cellVoltage_mV[stringNumber][(moduleNumber * BS_NR_OF_CELLS_PER_MODULE) + cellNumber]);
        /* Apply offset and factor */
        CAN_TxPrepareSignalData(&signalData_mV, cellVoltageSignal);
        /* Set voltage data in CAN frame */
        CAN_TxSetMessageDataWithSignalData(
            pMessage, cellVoltageSignal.bitStart, cellVoltageSignal.bitLength, (uint32_t)signalData_mV, endianness);
    }
}
 
/*========== Extern Function Implementations ================================*/
extern uint32_t CAN_TxVoltage(
    uint32_t id,
    uint8_t dlc,
    CAN_ENDIANNESS_e endianness,
    uint8_t *pCanData,
    uint8_t *pMuxId,
    const CAN_SHIM_s *const kpkCanShim) {
    FAS_ASSERT(id < CAN_MAX_11BIT_ID); /* Currently standard ID, 11 bit */
    FAS_ASSERT(dlc <= CAN_MAX_DLC);    /* Currently max 8 bytes in a CAN frame */
    FAS_ASSERT(pCanData != NULL_PTR);
    FAS_ASSERT(pMuxId != NULL_PTR);
    FAS_ASSERT(kpkCanShim != NULL_PTR);
    uint64_t message = 0;
 
    /* Reset mux if maximum was reached */
    if (*pMuxId >= (BS_NR_OF_STRINGS * BS_NR_OF_BAT_CELLS)) {
        *pMuxId = 0u;
    }
    /* First signal to transmit cell voltages: get database values */
    if (*pMuxId == 0u) {
        DATA_READ_DATA(kpkCanShim->pTableCellVoltage);
    }
 
    /* Set mux signal in CAN frame */
    uint32_t signalData = *pMuxId / NUMBER_OF_MUX_VOLTAGES_PER_MESSAGE;
    CAN_TxSetMessageDataWithSignalData(
        &message, cellVoltageMultiplexer.bitStart, cellVoltageMultiplexer.bitLength, (uint32_t)signalData, endianness);
 
    /* Set other signals in CAN frame */
    CAN_TxVoltageSetData(*pMuxId, &message, cellVoltage0_mV, cellVoltage0InvalidFlag, endianness, kpkCanShim);
    /* Increment multiplexer for next cell */
    (*pMuxId)++;
    CAN_TxVoltageSetData(*pMuxId, &message, cellVoltage1_mV, cellVoltage1InvalidFlag, endianness, kpkCanShim);
    /* Increment multiplexer for next cell */
    (*pMuxId)++;
    CAN_TxVoltageSetData(*pMuxId, &message, cellVoltage2_mV, cellVoltage2InvalidFlag, endianness, kpkCanShim);
    /* Increment multiplexer for next cell */
    (*pMuxId)++;
    CAN_TxVoltageSetData(*pMuxId, &message, cellVoltage3_mV, cellVoltage3InvalidFlag, endianness, kpkCanShim);
    /* Increment multiplexer for next cell */
    (*pMuxId)++;
 
    /* All signal data copied in CAN frame, now copy data in the buffer that will be use to send the frame */
    CAN_TxSetCanDataWithMessageData(message, pCanData, endianness);
 
    return 0;
}
 
/*========== Externalized Static Function Implementations (Unit Test) =======*/
#ifdef UNITY_UNIT_TEST
 
#endif