Datatype declaration for variables in F2812

Hi all,

Can any one tell me how do we declare data type for the variables having a fractional value

float n=0.2;
int16 AT0;
float BPe-06;
float C=2.109375e-06;,

i have assigned n,B,C as float. but DSP working in Fixed point.Should i mention the above as frac? how many bits whether it will take float as 16bit or 32 bit? or frac as 16bit or 32bit?

if i give float16 it gives error. My question seems to be silly to many of you, but i don't have any programming experience.

can any one answer me?

thanks in advance.

regards


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hi, datatype are standards from Ainsi C.

Float is a floating point representation, so your declaration are right.
DSP have no FPU (floating point unit), so all computation will be emulated
by DSP, very slow !

Fixed points means working with float as integer. See IQ library for the
DSP. It allows you to compute very fast, with the precision you want.

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Objet : [c28x] Datatype declaration for variables in F2812

Hi all,

Can any one tell me how do we declare data type for the variables having a
fractional value

float n=0.2;
int16 A=540;
float B=50e-06;
float C=2.109375e-06;,

i have assigned n,B,C as float. but DSP working in Fixed point.Should i
mention the above as frac? how many bits whether it will take float as
16bit or 32 bit? or frac as 16bit or 32bit?

if i give float16 it gives error. My question seems to be silly to many of
you, but i don't have any programming experience.

can any one answer me?

thanks in advance.

regards


Check Out Industry's First Single-Chip, Multi-Format, Real-Time HD Video Transcoding Solution for Commercial & Consumer End Equipment: www.ti.com/dm6467 Start a New Thread