Matthieu <nospam@nospam.com> wrote in
news:434523f2$0$12623$636a15ce@news.free.fr: 

> Hello,
> 
> I just received my EZ-Kit 21364 evaluation board.
> I've runned some examples provided with VDSP 4.0, and I looked to the
> source code, etc. I'm also currently reading the hardware reference
> of the 21364 processor.
> I want to write a simple LPF/HPF to get my hands on with the processor
> and board, but I have a few questions :
> 
> - I tried the basic analog audio talktrough C example (which just copy
> the input of the ADC to the DAC), but the 3 buffers are unsigned int,
> so I got ugly clicks and distortion when trying to code the simpliest
> LP filter. I'd like to set the data format to 32-bit float, anyone
> could give me a reference or tips ? I think I need to setup correctly
> the MODE1 register.
> 
> - Does anyone has good resources for audio filtering examples with
> 213xx ? 
> 
> Many thanks,
> Regards,
> 
> Matthieu.

We manufacture Sharc based DSP boards. We have boards that include an EZ-
KIt style debugger and look just klike an EZ-Kit to VDSP.

To convert from fixed to float:

	r1 = -31;
	f4 = FLOAT r4 BY r1;
  
To convert from fixed to float:

	r1 = 31;
	r0 = FIX f4 BY r1;

(Or something similiar)

This assumes 1.31 fixed format and that the float value is -1 to almost 
1.  




-- 
Al Clark
Danville Signal Processing, Inc.
--------------------------------------------------------------------
Purveyors of Fine DSP Hardware and other Cool Stuff
Available at http://www.danvillesignal.com

Hi,

Look in the installation subfolders, and see how is it managed with the 
other DSPs, in case that there is no example already for the '364.

-- 
------------------------------
Jaime Andr�s Aranguren Cardona
jaac@sanjaac.com
SanJaaC Electronics
Soluciones en DSP
www.sanjaac.com

"Matthieu" <nospam@nospam.com> escribi&#4294967295; en el mensaje 
news:434523f2$0$12623$636a15ce@news.free.fr...
> Hello,
>
> I just received my EZ-Kit 21364 evaluation board.
> I've runned some examples provided with VDSP 4.0, and I looked to the
> source code, etc. I'm also currently reading the hardware reference
> of the 21364 processor.
> I want to write a simple LPF/HPF to get my hands on with the processor and 
> board, but I have a few questions :
>
> - I tried the basic analog audio talktrough C example (which just copy the 
> input of the ADC to the DAC), but the 3 buffers are unsigned int, so I got 
> ugly clicks and distortion when trying to code the simpliest LP filter. 
> I'd like to set the data format to 32-bit float, anyone could give me a 
> reference or tips ? I think I need to setup correctly the MODE1 register.
>
> - Does anyone has good resources for audio filtering examples with 213xx ?
>
> Many thanks,
> Regards,
>
> Matthieu. 

Hello,

I just received my EZ-Kit 21364 evaluation board.
I've runned some examples provided with VDSP 4.0, and I looked to the
source code, etc. I'm also currently reading the hardware reference
of the 21364 processor.
I want to write a simple LPF/HPF to get my hands on with the processor 
and board, but I have a few questions :

- I tried the basic analog audio talktrough C example (which just copy 
the input of the ADC to the DAC), but the 3 buffers are unsigned int, so 
I got ugly clicks and distortion when trying to code the simpliest LP 
filter. I'd like to set the data format to 32-bit float, anyone could 
give me a reference or tips ? I think I need to setup correctly the 
MODE1 register.

- Does anyone has good resources for audio filtering examples with 213xx ?

Many thanks,
Regards,

Matthieu.