Avaraging unsigned integers

[oeliks]

Hi, Im searching way to avarage two unsigned 32 integers.

Is there any hardware help in doing this with stm?

[RMcCa]

Smells like a homework assignment. Division by powers of 2 with unsigned math is super easy. ​

[oeliks]

Man ... oh man =) Im not asking for software implementation but is there a hardware acceleration =) in stm32.

IThink I read that some stm's support hardware ADC avaraging (addind next measurments and bit schifting).

Its hobby, too old for homework :)​

​Im interested in stmf103 f303 h750 - playing with this micros :)

[S.Ma]

It already show that your question is not specific enough to get the anwer you look for.

Averaging 2 numbers by hardware... the core is not?

Well, at least look for FMAC CORDIC DFSDM peripiherals on the web to look for non core application specific accelerators.

[oeliks]

Well Yes, question was not specyfic enough :) I ment without core.​

Thanks :)​

[berendi]

The ADC averaging module is hardwired to average ADC values.

DMA2D can average 8 bit values, like blending two bitmaps.

DFSDM can do 16 bit averages, much like the one in the ADC, but it can take input data from DMA.

Nothing I know of can do 32 bit averages outside the CPU core.

[oeliks]

So I implemented it in software.

But is it super easy? If it would be super easy there wouldnt be us patents solving this problem :) I think. ​

[berendi]

Entertaining a cat with the shiny dot of a laser pointer must be a quite complicated task then, because there are no less than 5 patents covering it.

[RMcCa]

Cast them as floats and use the fpu?

That's some hardware.​

[Tesla DeLorean · Accepted solution]

unsigned 32-bit, the assembler would allow for a two register add with carry output, then rotate right to recover the overflow carry, and then decide if you need the low-order bit dropping into the carry should round up, or not, basically an ADC with zero immediate.

So 2 or 3 assembler instructions, all fast ones