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Coefficient calculation of bandpessfilter in SIGMA STUDIO

Started by ramm...@ymail.com in Analog Devices DSPs14 years ago 1 reply

hi everybody.. i have some queries regarding the coefficient calculation of filter in SIGMA STUDIO software.. in the software they had...

hi everybody.. i have some queries regarding the coefficient calculation of filter in SIGMA STUDIO software.. in the software they had provided equation to calculate the coefficients but there is some mistakes please help me to get correct equations ie:in 2nd order band pass filter design in the calculation of alpha they didn't provide the closing braces of SINH part eqation is like ...


EBIU DMA Transfer Querry for BLACKFIN BF561

Started by isni...@gmail.com in Analog Devices DSPs14 years ago

Hello All, I have developed a custom Board from Blackfin BF-561 processor. I am interfacing DSP with FPGA. I have interfaced the...

Hello All, I have developed a custom Board from Blackfin BF-561 processor. I am interfacing DSP with FPGA. I have interfaced the DSP to FPGA using EBIU Interface. I want to read the data from FPGA RAM though EBIU interface. I was able to successfully read the data from FPGA RAM using Core EBIU data transfer. But the read is quite slow, Hence I want to perform the DMA transfer...


unknown exception occurred after data structure modifed in BF561

Started by wzgllc in Analog Devices DSPs14 years ago 3 replies

Hi all, I want to modify a data structure for a BF561 application based on current stable version. What I found is everything goes well as long...

Hi all, I want to modify a data structure for a BF561 application based on current stable version. What I found is everything goes well as long as the size of the structure is the same but if I increase the size even one byte, two cores are halted because of 'unknown exception occurred'. I checked the LDF file and the structure objects are defined in L1_data_B for each core. I don't see why DS...


SDRAM - file Initialization problem

Started by neha d in Analog Devices DSPs14 years ago

Hi, I am using SDRAM to store an array[320][240]. I am declaring array as: #pragma section("sdram0") unsigned int...

Hi, I am using SDRAM to store an array[320][240]. I am declaring array as: #pragma section("sdram0") unsigned int frame_buffer[2][320][24]; I have loaded the initialization file SDRAMInit.dxe. Problem is my application does not run after loading this initialization file. If I remove this initialization file I get Warning ld0151. (initialixation file warning) If I remove the sdram opt...


Analog Device AD6654 in SPI Mode with Differential Inputs

Started by tanw...@stee.stengg.com in Analog Devices DSPs14 years ago 2 replies

Hi, I'm using Altera Stratix II to control the analog Device Part number AD6654(A mixed-signal IF-to-baseband receiver consisting of a 14-bit,...

Hi, I'm using Altera Stratix II to control the analog Device Part number AD6654(A mixed-signal IF-to-baseband receiver consisting of a 14-bit, 92.16 MSPS analog-to-digital converter (ADC) and a 4-/6-channel, multimode digital down-converter chip). I'm using VHDL to program the registers settings in SPI mode for this chip. I'm only able to program on its internal test signal (pseudo random test ...


maximum sequence size to compute FFT using BF535

Started by abhi...@gmail.com in Analog Devices DSPs14 years ago 3 replies

Hello I am trying to compute DFT using FFT in BF535. My need is to compute DFT of about 1 megasamples(1 million points). But since I'm very new...

Hello I am trying to compute DFT using FFT in BF535. My need is to compute DFT of about 1 megasamples(1 million points). But since I'm very new to the field and am using a DSP for the first time, I do not know whether this is possible. If it is possible using BF535, how much time does it take to do it? Thank you.


interfacing of three adau1701

Started by ramm...@ymail.com in Analog Devices DSPs14 years ago 1 reply

hi.. i have some doubts regarding interfacing of three adau1701. -whether same clock(crystal circuit can be applied to three of them) -we...

hi.. i have some doubts regarding interfacing of three adau1701. -whether same clock(crystal circuit can be applied to three of them) -we know for operating in self boot mode EEPROM is needed. do we need to use three EEPROM for three ic. In my project i want to save last settings, ie when i switch ON my device it should work with previous values for that i need an EEPROM. -please give ...


regarding QMF

Started by manisha pratihast in Analog Devices DSPs14 years ago 2 replies

hii i m m.tech student n doing rearch on this topic.plz tell me which project can i make on this topic. n? tell me about its practical...

hii i m m.tech student n doing rearch on this topic.plz tell me which project can i make on this topic. n? tell me about its practical application. which book or sites are better for this ? ? The INTERNET now has a personality. YOURS! See your Yahoo! Homepage. http://in.yahoo.com/


Correction in previous query

Started by ramm...@ymail.com in Analog Devices DSPs14 years ago 1 reply

hi.. i made mistake in post in the last part *We know w0 = 2*pi*f0/Fs *-what is the value of pi(180 0r 3.14) *-w0 is the angular...

hi.. i made mistake in post in the last part *We know w0 = 2*pi*f0/Fs *-what is the value of pi(180 0r 3.14) *-w0 is the angular representation of requency i think it will be 180 *-then in above value of alpha will be zero always. *-it means Q doesnt have any importantce in filter design *-please suggest a good book which describe in detail about filter design what i mea...


Filter coefficient calculation in Sigma studio

Started by ramm...@ymail.com in Analog Devices DSPs14 years ago 4 replies

hi.... i'm currently working on Analog Devices Dsp processor ADAU 1701.. Sigma studio is the software we are now on,in that i have some queries...

hi.... i'm currently working on Analog Devices Dsp processor ADAU 1701.. Sigma studio is the software we are now on,in that i have some queries in the way you people calculate filter coefficient. - main specification we needed to design a filter 1)Type[LPF,HPF, etc] 2)frequency 3)Q 4)Gain I want a 2nd order LPF with Frequency= 1000 Q=0.5 Gain=1 The given below derivation is ...


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