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OMAPL137 integration of eHRPWM with DSPBIOS

Dmitry K
Prodigy 230 points

Hi, everyone

My target is continuously generating sin on eHRPWM, while communication with DSP from ARM

I wrote pwm_isr() which plays with dirty cycle.

My question is how configure ECM to make the pwm_isr() be called for eHRPWM  event  (while  i2c/McASP/DMA/UART also in use)

my current ECM configuration in tci file looks like that (similar to any BIOS example) :

/* ECM configuration */
bios.HWI.instance("HWI_INT7").interruptSelectNumber = 0;
bios.HWI.instance("HWI_INT8").interruptSelectNumber = 1;
bios.HWI.instance("HWI_INT9").interruptSelectNumber = 2;
bios.HWI.instance("HWI_INT10").interruptSelectNumber = 3;

/* Enable ECM Handler */
bios.ECM.ENABLE = 1;

/* SOME OTHER McASP related taks*/

Ive tried to use another HWI_INT6 object with following properties:

bios.HWI.instance("HWI_INT6").interruptSelectNumber = 7;
bios.HWI.instance("HWI_INT6").fxn = prog.extern("pwm_isr");
bios.HWI.instance("HWI_INT6").useDispatcher = 1;

But the isr is not called :(

Any suggestions?

Thanks a lot

Dmitry

 

  • 0
    Prodigy 230 points

    Hello all,

    I've figured out on this page: http://processors.wiki.ti.com/index.php/Setting_up_interrupts_in_DSP_BIOS

    that interrupt should be enabled by calling:

    C64_enableIER(C64_EINT6);

    For some reason this sequence does not work if instead of HWI_INT6 I use HWI_INT5 or HWI_INT4 (without visible error) and HWI_INT11 is not usable also since read only.

    Are  HWI_INT5, HWI_INT4, HWI_INT11 used for something else? Can anybody point me to the doc?

    For a while i setup HWI_INT6 for eHRPWM0 and HWI_INT14 for eHRPWM1 with appropriate  C64_enableIER() calls

     

    Dmitry

     

  • 0 in reply to Dmitry K
    TI__Expert 7250 points
    Glad to see this was resolved