TMS320F280049C: 关于CLA的BackgroundTask和Task1的区别

我在使用CLA的过程中发现

CLA的初始化如下

void CLLLC_HAL_setupCLA(void)
{
    //
    // setup CLA to register an interrupt
    //
#if CLLLC_ISR1_RUNNING_ON == CLA_CORE

    memcpy((uint32_t *)&Cla1ProgRunStart, (uint32_t *)&Cla1ProgLoadStart,
            (uint32_t)&Cla1ProgLoadSize );

    //
    // first assign memory to CLA
    //
    MemCfg_setLSRAMMasterSel(MEMCFG_SECT_LS0, MEMCFG_LSRAMMASTER_CPU_CLA1);
    MemCfg_setLSRAMMasterSel(MEMCFG_SECT_LS1, MEMCFG_LSRAMMASTER_CPU_CLA1);
    MemCfg_setLSRAMMasterSel(MEMCFG_SECT_LS2, MEMCFG_LSRAMMASTER_CPU_CLA1);
    MemCfg_setLSRAMMasterSel(MEMCFG_SECT_LS3, MEMCFG_LSRAMMASTER_CPU_CLA1);
    MemCfg_setLSRAMMasterSel(MEMCFG_SECT_LS4, MEMCFG_LSRAMMASTER_CPU_CLA1);
    MemCfg_setLSRAMMasterSel(MEMCFG_SECT_LS5, MEMCFG_LSRAMMASTER_CPU_CLA1);
    MemCfg_setLSRAMMasterSel(MEMCFG_SECT_LS6, MEMCFG_LSRAMMASTER_CPU_CLA1);
    MemCfg_setLSRAMMasterSel(MEMCFG_SECT_LS7, MEMCFG_LSRAMMASTER_CPU_CLA1);

    MemCfg_setCLAMemType(MEMCFG_SECT_LS0, MEMCFG_CLA_MEM_DATA);
    MemCfg_setCLAMemType(MEMCFG_SECT_LS1, MEMCFG_CLA_MEM_DATA);
    MemCfg_setCLAMemType(MEMCFG_SECT_LS2, MEMCFG_CLA_MEM_DATA);
    MemCfg_setCLAMemType(MEMCFG_SECT_LS3, MEMCFG_CLA_MEM_DATA);
    MemCfg_setCLAMemType(MEMCFG_SECT_LS4, MEMCFG_CLA_MEM_PROGRAM);
    MemCfg_setCLAMemType(MEMCFG_SECT_LS5, MEMCFG_CLA_MEM_PROGRAM);
    MemCfg_setCLAMemType(MEMCFG_SECT_LS6, MEMCFG_CLA_MEM_PROGRAM);
    MemCfg_setCLAMemType(MEMCFG_SECT_LS7, MEMCFG_CLA_MEM_PROGRAM);

    //
    // Suppressing #770-D conversion from pointer to smaller integer
    // The CLA address range is 16 bits so the addresses passed to the MVECT
    // registers will be in the lower 64KW address space. Turn the warning
    // back on after the MVECTs are assigned addresses
    //
    #pragma diag_suppress = 770

    CLA_mapTaskVector(CLA1_BASE , CLA_MVECT_1, (uint16_t)&Cla1Task1);
    CLA_mapTaskVector(CLA1_BASE , CLA_MVECT_2, (uint16_t)&Cla1Task2);
    CLA_mapTaskVector(CLA1_BASE , CLA_MVECT_3, (uint16_t)&Cla1Task3);
    CLA_mapTaskVector(CLA1_BASE , CLA_MVECT_4, (uint16_t)&Cla1Task4);
    CLA_mapTaskVector(CLA1_BASE , CLA_MVECT_5, (uint16_t)&Cla1Task5);
    CLA_mapTaskVector(CLA1_BASE , CLA_MVECT_6, (uint16_t)&Cla1Task6);
    CLA_mapTaskVector(CLA1_BASE , CLA_MVECT_7, (uint16_t)&Cla1Task7);
    CLA_mapBackgroundTaskVector(CLA1_BASE, (uint16_t)&Cla1BackgroundTask);

    #pragma diag_warning = 770

    CLA_enableIACK(CLA1_BASE);
    CLA_enableTasks(CLA1_BASE, CLA_TASKFLAG_ALL);

    CLA_enableHardwareTrigger(CLA1_BASE);
    CLA_setTriggerSource(CLA_TASK_8, CLLLC_ISR2_TRIG_CLA);
    CLA_enableBackgroundTask(CLA1_BASE);

    CLA_setTriggerSource(CLA_TASK_1, CLLLC_ISR2_TRIG_CLA);//CLA_TRIGGER_ADCB1);//CLLLC_ISR1_TRIG_CLA);
#endif
}

当我使用BackgroundTask时

__attribute__((interrupt("background")))  void Cla1BackgroundTask ( void )
{


#ifdef BUCK_CONTROL_RUNNING_ON_CLA
    BUCK_runIsr();
#ifdef BUCK2_ENABLE
    BUCK2_runIsr();
#endif
#ifdef BUCK3_ENABLE
    BUCK3_runIsr();
#endif
#ifdef BUCK4_ENABLE
    BUCK4_runIsr();
#endif
#endif
    if(CLAtest == 1)
    {
        CLLLC_HAL_setProfilingGPIO2();//GPIO22置高
        CLAtest = 0;
    }
    else
    {
        CLLLC_HAL_resetProfilingGPIO2();//GPIO22置低
        CLAtest = 1;
    }
}

编译就会不通过，如图

但当我把相同的任务内容放在Task1时

__attribute__((interrupt))  void Cla1Task1 ( void )
{  
    #if(CLA_DEBUG == 1)
        __mdebugstop();
    #endif
#ifdef BUCK_CONTROL_RUNNING_ON_CLA
    BUCK_runIsr();
#ifdef BUCK2_ENABLE
    BUCK2_runIsr();
#endif
#ifdef BUCK3_ENABLE
    BUCK3_runIsr();
#endif
#ifdef BUCK4_ENABLE
    BUCK4_runIsr();
#endif
#endif
    if(CLAtest == 1)
    {
        CLLLC_HAL_setProfilingGPIO2();//GPIO22置高
        CLAtest = 0;
    }
    else
    {
        CLLLC_HAL_resetProfilingGPIO2();//GPIO22置低
        CLAtest = 1;
    }
}

程序就能编译通过并正常运行，这是什么原因？