DSP

HICE-218x: new ADSP-218x family DSP emulator
Postponed for several months, HCIE-218x is finished at last. http://energy.51.net/hice218x/index.htm HICE-218x is another emulator for ADSP-218x family fixed-point DSPs. It's compatible with EZ-ICE-218x, but with a few improvements: * USB2.0 interface, powered by USB, no AC adapter needed * Working at 46080... 2 Sep 2005 14:48

Undersampling of a clean carrier
Hi, I have just been doing some test and I noticed a concerning problem that I may be having with the undersampling design (for FM demod). I basically set up my board so that the adc input (which is clocked at 80MHz) feeds directly into a DAC also clocked at 80MHz. If I put a 20MHz tone (clean sine wave CW... 16 Sep 2005 07:54

filter design
Hi, Suppose I want to design a digital filter for some application. There are some options to do this: - weighted least squares design - minimax design - filter design based on 'windows' (fir1, fir2) - equiripple design (remez) Which method is the most used (in education, in industry)? Which method result... 1 Sep 2005 09:43

PWM generation using TMS320F2812
Dear all, Is there anybody can help me out on how to generate a programmed PWM signal using F2812DSP board. It has been suggested that I may set-up one of the PWM outputs such that is has a frequency of say 2^14*50 = 819.2 KHz. Next, quantize your waveform into 2^14 time slices. Set up the Timer ISR on the DSP to lo... 1 Sep 2005 08:10

How to design a graphic equalizer
I am doing a software project about a ten-band graphic equalizer. Is there any solutions about how to design it? Currently, I have the following ideas: 1.Use FFT, apply different gains to each frequency bin. But for low frequency band like 31.25Hz, 62.5Hz, 125Hz, there are few frequency bins even using large l... 29 Aug 2005 00:54

SPI to USB
Hello everbody I'm new in this group! I've got a few questions to this group. 1. Is it possible to convert SPI to USB with a data transfer rate of 2 Mbitps? And the same back USB to SPI. If it is not possible there is my second question. Can I save data on an external HardDisk. I want to develop a "Stand-Alone-Modu... 25 Aug 2005 13:22

Unsigned Fixed Point Long Division Fractional Divide Function (32 bit/ 32 bit)
Hello all, I am looking for an unsigned long division C or C55x assembly function (i.e., a 32 bit dividend and a 32-bit divisor, yielding a 32-bit quotient) for a TI C5500 DSP. I would like to get a quotient data format of 16.16 (16 bits integer, 16 bits fractional) from a 32 bit dividend (uint) and 32-... 10 Aug 2005 09:37

Decoding DTMF
hi all, i need to write an application that listen for DTMF tones from standard audio input (from the mic) and execute an action depending on the digit extracted from the DTMF tone. Unfortunaly i have short time to set up this application and i'm really new to this kind of problem (sound analisys). I take a look a... 10 Aug 2005 09:37

c/c++ source code needed
I've been scowering the net (i.e., musicdsp.org, google, etc) for full source code implementations of these effects: reverb, echo/delay, distortion and chorus. Any implementations will do as long as they have at least 2 or 3 parameters that I can change. What I'm looking for basically is a function that takes an... 10 Aug 2005 09:37

Gaussian Filter
Hi everyone, I am studying an implementation of a Canny Edge Detection algorithm. The algorithm convolves a Gaussian mask with an image data. The code actually calculates a mean gaussian value as follows: float gauss(float x, float sigma) { float xx; if (sigma == 0) return 0.0; xx = (float)e... 31 Jul 2005 13:11