Wavecom WMP100 - Using TCU Service (Open AT OS) - Need help

Code C++ - [expand]
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#include "adl_global.h"
#include "adl_irq.h"
#include "adl_tcu.h"
 
const u16 wm_apmCustomStackSize = 1024 * 3;
s32 TCUHandle;
s32 IRQHandle;
adl_tcuTimerSettings_t Config;
adl_tcuTimerDuration_t timerDurationConfig;
 
 
bool MyTCUHandler (adl_irqID_e Source, adl_irqNotificationLevel_e NotoficationLevel, adl_irqEventData_t * Data) {
    if (Source == ADL_IRQ_ID_TIMER) {
        TRACE (( 1, "Timer event"));
        adl_atSendResponse(ADL_AT_UNS, "Timer Event");
    }
    return TRUE;
}
 
void myFunction1(void) {
    timerDurationConfig.DurationUnit = ADL_TCU_TIMER_UNIT_MS;
    timerDurationConfig.DurationValue = 5;
    Config.Duration = timerDurationConfig;
    Config.Periodic = TRUE;
 
    adl_irqCapabilities_t Caps;
    adl_irqConfig_t IrqConfig;
    adl_irqGetCapabilities(&Caps);
 
    //Set configuration
    IrqConfig.PriorityLevel = Caps.PriorityLevelsCount-1;
    IrqConfig.Enable = TRUE;
    IrqConfig.Options = ADL_IRQ_OPTION_AUTO_READ;
 
    IRQHandle = adl_irqSubscribeExt(MyTCUHandler, ADL_IRQ_NOTIFY_LOW_LEVEL, &IrqConfig);
    TCUHandle = adl_tcuSubscribe(ADL_TCU_ACCURATE_TIMER, IRQHandle, 0, &Config, NULL);
    adl_tcuStart(TCUHandle);
}
 
void myFunction2() {
    ascii tekst[30] = { 0 };
    adl_tcuTimerDuration_t RemainingTimer;
    adl_tcuStop(TCUHandle, &RemainingTimer);
    adl_tcuUnsubscribe(TCUHandle);
    wm_sprintf(tekst, "\r\n Remaining time: %d\r\n",
                        RemainingTimer.DurationValue);
                adl_atSendResponse(ADL_AT_UNS, tekst);
}
 
void adl_main(adl_InitType_e InitType) {
    TRACE (( 1, "Embedded Application : Main" ));
    myFunction1();
}