TMS570LS1227: Replacement for delay()

Suyog Mahajan

Part Number: TMS570LS1227

Hello,

I'm newbie to microcontroller. I'm having the implementation problem in my code. I am varying the duty cycle for each new iteration in for loop. When I set the breakpoint at any line inside the 'for' loop(iteration =x), it won't jump to 'x+1'th next iteration. It will directly go to 'x+~20'th iteration. In short, I think it's not waiting till it writes the register. Simply it's skipping. When I inserted blank 'for' loop having 4000+ iterations at end of the loop. It's working fine.

Is there any module to work that it will generate the interrupt after writing and will wait till it completes? or any other suggestions are welcome.

for (i=0;i<62;i++)
{
if (hetREG1->FLG == 0x00001ffe)
{
hetRAM1->Instruction[L14].Data = ((uint32) a_max[i] << 7)

hetREG1->FLG = 0x00001ffe;
}
}

Regards,

Suyog

over 8 years ago

0 QJ Wang over 8 years ago

TI__Guru**** 197356 points

Hello Suyog,

Do you enable the interrupt (IRQ=ON) in your NHET instructions?

If you want to change the duty cycle, just call this:

hetRAM->Instruction[x].Data = ((pwmPeriod * pwmDuty) / 100 << 7U) + 128U;

I don't understand your code. Are you going to update the duty cycle whenever your get an interrupt from those 12 instructions (0x1FFE)?

0 Suyog Mahajan over 8 years ago in reply to QJ Wang

Intellectual 520 points

Do you enable the interrupt (IRQ=ON) in your NHET instructions?

Yes

If you want to change the duty cycle, just call this:

hetRAM->Instruction[x].Data = ((pwmPeriod * pwmDuty) / 100 << 7U) + 128U;

Ok, I will try with this also. If I'm not wrong, pwmDuty is in % ?

I don't understand your code. Are you going to update the duty cycle whenever your get an interrupt from those 12 instructions (0x1FFE)?

Basically, I've to write when all PWMs with their periods are completed. Earlier, it was randomly updating when I was not using intterupt. I wanted to update all instructions at the same time.