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kseng2002
Joined: 27 Aug 2004
Posts: 690
Helped: 418
Location: Malaysia
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 03 Sep 2004 17:25 How to link a ADC to DSP unit ? |
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Hi, regarding to the topic, i have no idea at all .... Can give me some idea how to do it ? Thank you very much ~ ! ! ! 
Last edited by kseng2002 on 08 Oct 2004 13:32; edited 1 time in total |
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Fish4Fun
Joined: 27 Feb 2004
Posts: 21
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| 03 Sep 2004 21:40 How to link a ADC to a DSP unit ? |
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I am working on an ADC project as well. It appears that you may need to give a little more information before anyone can help you. A lot depends on the type of ADC and the type of Digital Signal Processor you are using, and what your ultimate goal is. In my case I want to use an ADC to monitor an input voltage and ultimately represent this voltage as a function of time on a computer monitor (ie a PC DSO). For this project I will buffer the ADC digital outputs into RAM and then send them to a PC via a standard comm interface, but this is only one possible use of an ADC being used to process an analog signal into a digital format. Without having more information on your project it is very difficult to answer your "topic".
Cheers
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kseng2002
Joined: 27 Aug 2004
Posts: 690
Helped: 418
Location: Malaysia
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| 04 Sep 2004 2:39 Re: How to link a ADC to a DSP unit ? |
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| Yaya~! Fish4Fun, i'm doing the same project with you ! =) I'm using TLC549 ADC (TI company) & my ultimate goal also is to monitor an input voltage & display it on time in the PC. Can give me some idea what DSP system is freindly using & what's the technique to link the ADC with a DSP unit ? Thx~ !
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dinolin
Joined: 19 Jul 2002
Posts: 39
Helped: 1
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| 04 Sep 2004 8:18 Re: How to link a ADC to a DSP unit ? |
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| for audio adc, you can use i2s interface
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Fish4Fun
Joined: 27 Feb 2004
Posts: 21
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| 05 Sep 2004 20:12 How to link a ADC to a DSP unit ? |
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kseng2002,
What frequency domain are you interested in? It appears from your ADC selection that you are interested in 8 bit resolution audio frequency. If I might suggest, you can achieve this quite easily with your PC's sound card. Simply "record" your wave form and then "display" it in any one of a number of available freeware/shareware apps. This will only allow you two channels, but the sample depth is limted only by your PC's memory resources.
If you decide you want to build an external ADC, you could use up to 8 of the chips you selected and send the output from each to one PortPin of an 8 bit MCU register then echo these bytes to your PC through either a USART or Parallel interface and allow your PC to parse the bits back together, but this is just one idea.
It does not sound like what you are doing is going to justify a full blown Digital Signal Processor unless this is a small part of a larger project. IMHO the more you can do on the PC and the less you have to build from discrete components the better off you will be.
Hunter
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gooodman
Joined: 18 Nov 2004
Posts: 42
Helped: 1
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| 29 Nov 2004 15:50 Re: How to link a ADC to DSP unit ? |
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Hi,
There are many application note in TI web site.
Why don't you just go to ti.com and search what you want.
You will find every thing what you want
I do that same work.
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jetset
Joined: 17 Jun 2004
Posts: 145
Helped: 10
Location: Panama
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| 02 Dec 2004 3:28 Re: How to link a ADC to DSP unit ? |
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| Hum you should rather use a PCM codec.
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nj_jack
Joined: 09 Nov 2004
Posts: 90
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| 15 Dec 2004 7:47 How to link a ADC to DSP unit ? |
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| you can link them through FIFO or CPLD, etc.
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lalu281276
Joined: 22 Nov 2004
Posts: 8
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| 15 Dec 2004 8:31 Re: How to link a ADC to a DSP unit ? |
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Dear Fish4Fun,
I'm also doing same type of project, can U send some stuff for help.
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rongli
Joined: 13 Dec 2004
Posts: 35
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| 16 Dec 2004 5:57 How to link a ADC to DSP unit ? |
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| using mcu?
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