Can interrupt number assigned by Timer_create be configured?

Geraldine Maclear

Other Parts Discussed in Thread: SYSBIOS

Hello,

I posted the following question to the Multicore forum (http://e2e.ti.com/support/dsp/c6000_multi-core_dsps/f/639/p/285187/995065.aspx#995065) and was advised that I would probably get a better response here. I was also told to look at this post for help: http://e2e.ti.com/support/embedded/bios/f/355/t/94262.aspx

I have looked at that post but it talks about changing the field timerParams.intNum.

This is after declaring this: var Timer = xdc.useModule('ti.sysbios.hal.Timer'); var timerParams = new Timer.Params();

I cannot do that because there is no "intNum" field available for timerParams as far as I can tell. This is from the file MCSDK\bios_6_33_04_39\packages\ti\sysbios\hal\Timer.h

struct ti_sysbios_hal_Timer_Params {
    size_t __size;
    const void* __self;
    void* __fxns;
    xdc_runtime_IInstance_Params* instance;
    ti_sysbios_interfaces_ITimer_RunMode runMode;
    ti_sysbios_interfaces_ITimer_StartMode startMode;
    xdc_UArg arg;
    xdc_UInt32 period;
    ti_sysbios_interfaces_ITimer_PeriodType periodType;
    xdc_runtime_Types_FreqHz extFreq;
    xdc_runtime_IInstance_Params __iprms;
};

There is no intNum field.

Also in the CCS Help system when I search for Timer_create, it shows me this for the module ti.sysbios.hal.Timer:

typedef struct Timer_Params {

// Instance config-params structure

IInstance_Params *instance;

// Common per-instance configs

UArg arg;

// Argument for tick function

Types_FreqHz extFreq;

// Timer frequency

UInt32 period;

// Period of a tick

ITimer_PeriodType periodType;

// Period type

ITimer_RunMode runMode;

// Timer run mode

ITimer_StartMode startMode;

// Timer start mode

} Timer_Params;

There is no intNum field.

So I'm copying my original post below and I'd like to know how to control the interrupt number used by the timer. Thanks.

ORIGINAL POST:

I am working with a C6670. I want a 10mS timer to trigger periodic processing so I have set up a timer as follows:

   Error_Block eb;
   Timer_Params timerParams;
   Timer_Handle timerHandle = 0;
   SSP_RESULT ret = SSP_OK;

   Error_init(&eb);
   Timer_Params_init(&timerParams);
   timerParams.period = 10000; /* 10 ms */
   timerHandle = Timer_create(Timer_ANY, TimerTickFunction, &timerParams, &eb);
   if (timerHandle == NULL)
   {
      PRINT_ERROR("Timer create failed\n");
      ret = TARGET_INTERRUPT_MANAGER_TIMER_CREATE_FAIL;
      TARGET_HLL_SetErrorEvent(&ret);
      return ret;
   }

   return ret;

The call to Timer_create was failing. Debugging showed that another interrupt assigned to interrupt number 4 was causing this problem:

Hwi_create(4, TempAlarmIsrHandler, &hwiParams, &eb);

If the interrupt number in this call to Hwi_create was changed from 4 to 6 then the timer was successfully created. After the call to Timer_create, this new field appeared in the ROV Hwi view: IntNum = 4, fxn = TImerTickFunction, eventId = 65 (Data manual shows that event 65 is TINTHn6 Local Timer interrupt high).

My question is why Timer_create uses IntNum = 4. Is this configurable? I haven't been able to find a description of the default interrupt number in the timer documentation which I have looked through.

Thanks,
Geraldine

over 12 years ago