Posted on May 17, 2011 at 12:49Dear all,
I'm Pleased to announce you the availability of a DSP library of our STM32 microcontrollers, allowing developers to take full advantage of the STM32 to host signal processing and control functions on the same core. ST is the first supplier of ARM Cortex-M3 based MCUs to provide an extensive DSP library, allowing developers to optimize application performance and reduce time to market.
The STM32 DSP library is license-free, royalty-free, and provides a large number of valuable functions coded in C or assembly language. These include a PID controller, Fourier transform functions, and a selection of digital filters such as 16-bit FIR, IIR direct-form, and IIR canonical-form filters. The functions are ready to use, easy to integrate, and are comprehensively documented to promote software maintainability and accelerate end-product development.
Taking advantage of the signal-processing capabilities of the ARM Cortex-M3 instruction set, the library functions achieve high execution speeds. Operations such as multiply-accumulate or hardware divide can be executed within only two cycles. Demonstrations running on the STM32F103 Performance Line MCU have performed a complex 256-point 16-bit radix-4 Fast Fourier Transform (FFT) in only 362µs.
Compared to alternative hybrid architectures such as digital signal controllers (DSC) with separate control- and signal-processing cores, the STM32 streamlines software development, enhances performance, and allows developers to use standard tools. The new DSP libraries can be used with the IAR, Keil and Raisonance tool-chains for the STM32. Developers will take advantage of these benefits to reduce cost and time-to-market for applications such as digital power conversion including solar-energy projects, closed-loop control of switched-mode power supplies, audio and speech processing, and digital image processing.
The STM32 DSP software library includes the following digital signal processing functions:
+ PID controller
+ FFT transform
The discrete Fourier transform uses complex radix-4 FFT and can transform 64, 256 and 1024 points.
+ FIR filter (number of taps and number of output samples must be a multiple of 4)
+ IIR filter
o Direct-form I IIR filter of order 4
o Canonical-form IIR filter of order 8, in 4 second order biquads
The STM32 DSP software library function-execution speed takes advantage of the STM32 microcontroller’s Cortex-M3 core instruction set including hardware divide executed in 2 cycles minimum and multiply and accumulate instruction being executed in 2 cycles.
http://www.st.com/mcu/inchtml-pages-stm32_dsp.html
Cheers,
STOne-32.
[ This message was edited by: STOne-32 on 28-10-2008 20:12 ]
