DSP library for the ST10f269

patrick239955_stm1_stmicro · ‎2005-04-17

Posted on April 18, 2005 at 05:27

patrick239955_stm1_stmicro · ‎2005-04-07

Posted on April 07, 2005 at 10:08

Hello,

I don't know how to use the arithmetic functions of the DSP library for floating point operations. Is there a other way to realize floating point operations by the DSP library?

A software problem occurs when a floating point value in the C code is multiplied by 0 (without the DSP livbrary): then there is an exception, which is triggered by the ST10. Why is this happening?

Thank you for your support.

charles239955_st · ‎2005-04-14

Posted on April 15, 2005 at 08:04

Hello,

The DSP library is only handling fixed point variables. For floating point, for many functions there are either algorithms available, either tools to generate ANSI C code that can be compiled with a ST10 toolchain.

For the handling of the exceptions in floating point libraries, this is related to the compiler. There is an option to check or not for these exceptions.

patrick239955_stm1_stmicro · ‎2005-04-14

Posted on April 15, 2005 at 08:56

Hello,

I have to optimize a self-written C function, which uses floating point variables. Is this possible with the MAC unit of the ST10f269? How can I involve the MAC unit? Or are there other possibilities?

Where can I find these tools that generate ANSI C code for floating point operations? Is this code then already optimized?

Thank you for the information. :)

luca239955_st · ‎2005-04-17

Posted on April 18, 2005 at 05:27

Quote:

How can I involve the MAC unit?

With the Cosmic ST10 compiler, there is at least one way to ''force'' the use of the MAC with C Code. However I don't think that floating point stuff is the best candidate to achieve significant optimization when using the MAC.

If you want mor details you can contact me offline.

Regards,

Luca (Cosmic)