OMAP35x EVM jump-starts low-power apps
The modular and extensible OMAP35x Evaluation Module (EVM) enables developers to
start building applications based on the OMAP35x architecture:
http://www.DSPRelated.com/omap35x
Reply by naayagi●June 11, 20082008-06-11
Have you defined the global Q value, which has to be set in IQmathLib.h
file. Is your global Q is 29?
On Wed, Jun 11, 2008 at 12:31 PM, wrote:
> Hello Everybody,
>
> I am a newbie in DSP. I have a project that i am using the TMS320F2812
> processor. I need to use _IQsin function therefore i saw in IQmath.pdf, a
> example with this function. But i can't get the same results of the
example.
>
> The example project include this source file (*.c) :
>
> #include
> #include "IQmathLib.h"
>
> // Define constants used:
>
> #define PI 3.141592654
>
> //--------
> // Main code:
> //--------
>
> _iq in1, out1;
>
> void main(void )
> {
> in1=_IQ(0.25*PI);
> out1=_IQsin(_IQ(0.25*PI));
> }
> Results with the Watch Window :
>
> in1 = 0.7853981853 (Qvalue(29))
> out1 = -1.862645149e-09 (Qvalue(29)) WRONG Value!!
> I have include this linker file in my project (*.cmd):
>
/****************************************************************************/
> /* Sample Link Command File For, Target Processor(s): F2812 EzDSP
>
>
/****************************************************************************/
>
> MEMORY
> {
> PAGE 0 : RAMH0 (RW) : origin = 0x3f8000, length = 0x002000
> BOOTROM (RW) : origin = 0x3ff000, length = 0x000fc0
> VECTORS (RW) : origin = 0x3fffc2, length = 0x00003e
> RESET (RW) : origin = 0x3fffc0, length = 0x000002
>
> PAGE 1 : RAMM0M1 (RW) : origin = 0x000000, length = 0x000800
> RAML0L1 (RW) : origin = 0x008000, length = 0x002000
> }
>
> SECTIONS
> {
> .reset : load = RESET, type = DSECT, PAGE = 0
>
> /* .text needs to be the first section into RAMH0 for */
> /* boot to H0 to work properly. */
>
> .text : load = RAMH0, PAGE = 0
> .cinit : load = RAMH0, PAGE = 0
> .econst : load = RAMH0, PAGE = 0
> .bss : load = RAML0L1, PAGE = 1
> .ebss : load = RAML0L1, PAGE = 1
> .data : load = RAML0L1, PAGE = 1
> .const : load = RAML0L1, PAGE = 1
> .stack : load = RAMM0M1, PAGE = 1
> .sysmem : load = RAML0L1, PAGE = 1
>
> /*
OMAP35x EVM jump-starts low-power apps
The modular and extensible OMAP35x Evaluation Module (EVM) enables developers to
start building applications based on the OMAP35x architecture:
http://www.DSPRelated.com/omap35x
Reply by ruim...@yahoo.com●June 11, 20082008-06-11
Hello Everybody,
I am a newbie in DSP. I have a project that i am using the TMS320F2812
processor. I need to use _IQsin function therefore i saw in IQmath.pdf, a
example with this function. But i can't get the same results of the
example.
The example project include this source file (*.c) :
/*==========================================================*/
/* Tables for IQ math functions: */
/*==========================================================*/
/* For K1 device (no tables in boot ROM), use this: */
/*
IQmathTables : load = BOOTROM, PAGE = 0
*/
/* For F2810/12 devices (with tables in Boot ROM) use this: */
/*==========================================================*/
/* IQ math functions: */
/*==========================================================*/
IQmath : load = RAMH0, PAGE = 0
}
I canĀ“t understand what is wrong. I hope you can give me any clue to solve
it.
Thanks,
Rui Machado
OMAP35x EVM jump-starts low-power apps
The modular and extensible OMAP35x Evaluation Module (EVM) enables developers to
start building applications based on the OMAP35x architecture:
http://www.DSPRelated.com/omap35x