adsp 21992 | Analog Devices DSPs

Technical discussions related to Analog Devices DSPs (including Blackfin, TigerSHARC, SHARC and ADSP-21xx DSPs).

hi all I am working on a project "Data Acquisition Using ADSP 21992" in which i want to acquire a signal in the range of 1 MHz.after acquisition we need to do multirate sampling i.e downsampling & upsampling of the acquired signal. Can anybody tell me how to change the sampling rate in ADSP 21992 ,its specification are that it samples at 20 MSPS. it will be realy helpful if any of you can provide the code for downsampling & upsampling--------or some relevant link on the web. which processor best suits for data acquisition purpose? where can we store such a huge data & how do we access the acquired signal Any relevant starting help in this regard is highly appreciable. thanks in advance. -----dhanraj bansal

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Hi, You can get your own copy of the "ADSP-2199x Mixed Signal DSP Controller Hardware Reference", which besides the datasheet, is the documentation set you need for working with this DSP. Specifically, you'll need to pay attention to Chapter 19: Analog To Digital Converter System. From there, page 19-6 you can read: "The ADC of the ADSP-2199x is clocked at a rate that is divided down from the peripheral clock, HCLK, of the ADSP-2199x. The ADCCLK is programmable by the user via the 4-bit field ADCCLKSEL in register ADCCTRL[11:8]. It is related to the peripheral clock by: ADCCLOCK = HCLOCK/(2 x ADCCLKSEL), ADCCLKSEL = 2,3,...,15" I hope this helps. JaaC --- dhan raj <> wrote: > hi all > I am working on a project "Data Acquisition Using > ADSP 21992" in which i want to acquire a signal in > the range of 1 MHz.after acquisition we need to do > multirate sampling i.e downsampling & upsampling of > the acquired signal. > Can anybody tell me how to change the sampling rate > in ADSP 21992 ,its specification are that it samples > at 20 MSPS. it will be realy helpful if any of you > can provide the code for downsampling & > upsampling--------or some relevant link on the web. > which processor best suits for data acquisition > purpose? > where can we store such a huge data & how do we > access the acquired signal > > Any relevant starting help in this regard is highly > appreciable. > thanks in advance. > -----dhanraj bansal ===== Jaime Andr�s Aranguren Cardona __________________________________

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Discussion Groups | Analog Devices DSPs | adsp 21992

adsp 21992 - dhan raj - Jan 30 3:18:00 2005

Re: adsp 21992 - Jaime Andres Aranguren Cardona - Jan 30 14:21:00 2005