TMS570 Timer Interrupts

Dave Saggs

Other Parts Discussed in Thread: TMS570LS20216, NOWECC, HALCOGEN

Hi,

I am using the TMS570 Microcontroller Development Stick, with a TMS570LS20216 MCU (ASPGEQQ1). I would like to be able to use a timer, such as timer 0 to generate regular interrupt ticks, that can be used to perform time critical tasks.

I have used timer 0 previously on a project using a TMS320, which used the interrupt _c_int99. I have looked at the code that comes with the development stick, which mentions timer 0. But the only reference to timer 0 is as follows:

/* Timer 0 Configuration                                                     */
/* 0x44 */
union t0c
{
unsigned long T0C_UL;
struct
    {
      unsigned           : 2;
      unsigned t0mo_B14 : 14;
      unsigned           : 1;
      unsigned t0cc_B7   : 7;
      unsigned           : 6;
      unsigned t0ms_B1   : 1;
      unsigned t0rc_B1   : 1;
    } T0C_ST;
} T0C_UN;

Can I use this timer to generate regular interrupts?

Is there any sample code available that could help me generate regular timer interrupts using timer 0 or any other timer?

Or can anyone point me in the right direction?

Regards,

Dave

over 14 years ago

0 Haixiao Weng over 14 years ago

TI__Genius 13810 points

Dave,

Here is an application note about RTI in TMS570.

http://focus.ti.com/general/docs/lit/getliterature.tsp?literatureNumber=SPNA123&fileType=pdf

At the end of the application note, there is example code.

Regards,

Haixiao

0 Dave Saggs over 14 years ago in reply to Haixiao Weng

Intellectual 720 points

Haixiao,

Thank you for your reply.

I will try to integrate the file into my project.

Regards,

Dave

0 Dave Saggs over 14 years ago in reply to Dave Saggs

Intellectual 720 points

Haixiao,

I had a look at the application note and tried the example code. Unfortunately I do not have the include files (for the example code) necessary for the following:

SYSTEM_ST,
PCR_ST,
VIM_ST,
VIM_RAM_ST,
RTI_ST
GIO_ST

so the pointers (*SYS_Ptr, *PCR_Ptr *VIM_Ptr and so on) are not initialised.

Please could you tell me where I might find the required include files?

Regards,
Dave

0 Haixiao Weng over 14 years ago in reply to Dave Saggs

TI__Genius 13810 points

I will connect the author to find the source code.

If you doesn't hear any response from me by the end of the coming Monday, send me email. Haixiao.weng@ti.com.

Regards,

Haixiao

0 Haixiao Weng over 14 years ago in reply to Haixiao Weng

TI__Genius 13810 points

I can not reach the author. I wrote an example to blink the LED (HET0-2). Please note that, in theory, all the 2 Mega byte Flash area should be programmed with ECC. In the example, to speed the process, I only programmed those ECC area that has code. In your application, please fill all the 2 Mega Flash and ECC.

After you build the file in CCS, run the create_ECC.bat file to generate the ECC. Then, programming the TMS570_RTI.out to your USB stick using nowECC.

The project was built in CCS3.3. If you use CCS4, you need to 'import legacy projects'.

6607.TMS570_RTI.zip

Regards,

Haixiao

0 Dave Saggs over 14 years ago in reply to Haixiao Weng

Intellectual 720 points

Haixiao,

I have created some code that works, by using the HalCoGen utility. I set it up to use FIQ interrupts, but I noticed that the address of rtiCompareInterrupt0 was coming up in the IRQ register. So I had to enable IRQ interrupts in order to get the interrupts to work.

Thank you very much for your help. The application report spna123.pdf was particularly useful, in terms of understanding how the system works.

Regards,

Dave

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TMS570 Timer Interrupts