Help.....DSP on ARM9 or ARM7!!!!
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From: jagdish.dsp on 30 Jan 2006 12:28 Dear Friends, In my design I need to develope a DSP algorithm on one DSP processor and then to interface same with ARM which is handling all the peripherals. I am thinking if my DSP algorithm can be implemented on ARM or not...so need you help. Right now I am using evaluation board of Texas DSK, so taking the input from microphone is given to CODEC(A to D conversion) whose sampling freq is 32KHz. I have to implement 8192 point FFT on real time sound data.... And also want to implement Low pass FIR filter on Real time sound data before doing FFT. So can this be implemented on ARM 9 platform?????? while pareallaly I want to interface one modem, IR receiver,key board, and external memory with ARM. If possible please let me know which will be the best ARM9 based chip to implement the same. So is it possible to implement all this on ARM7 or ARM9 platform so with one processor only I will have my solution. What chip should I use for A/D conversion with good sampling of sound. Please help me....... Thanks and Regards, Jagdish.
From: linnix on 30 Jan 2006 13:57 jagdish.dsp wrote: > Dear Friends, > > In my design I need to develope a DSP algorithm on one DSP processor and > then to interface same with ARM which is handling all the peripherals. > > I am thinking if my DSP algorithm can be implemented on ARM or not...so > need you help. Right now I am using evaluation board of Texas DSK, so > taking the input from microphone is given to CODEC(A to D conversion) > whose sampling freq is 32KHz. > > I have to implement 8192 point FFT on real time sound data.... You need 16 bits or 2x12bits A2D. I don't think there is 13 bits A2D. > And also want to implement Low pass FIR filter on Real time sound data > before doing FFT. So can this be implemented on ARM 9 platform?????? You need over 1GHz ARM, preferrable with muti-media instructions. > while pareallaly I want to interface one modem, IR receiver,key board, and > external memory with ARM. If possible please let me know which will be the > best ARM9 based chip to implement the same. > > So is it possible to implement all this on ARM7 or ARM9 platform so with > one processor only I will have my solution. What's wrong with DSP? > What chip should I use for A/D conversion with good sampling of sound. > > Please help me....... > Thanks and Regards, > > Jagdish.
From: Isaac Bosompem on 30 Jan 2006 16:53 I agree as well, a 8192 point FFT in realtime is going to need a lot of horsepower. It is probably best to leave it to the DSP and have the ARM7/9 control the DSP.
From: Wilco Dijkstra on 30 Jan 2006 17:24 "jagdish.dsp" <jagdish.dsp(a)gmail.com> wrote in message news:uuSdnROkSq5X0UPeRVn-uQ(a)giganews.com... > Dear Friends, > > In my design I need to develope a DSP algorithm on one DSP processor and > then to interface same with ARM which is handling all the peripherals. > > I am thinking if my DSP algorithm can be implemented on ARM or not...so > need you help. Right now I am using evaluation board of Texas DSK, so > taking the input from microphone is given to CODEC(A to D conversion) > whose sampling freq is 32KHz. > > I have to implement 8192 point FFT on real time sound data.... An ARM7 takes 2Mhz to perform a 8192 complex Q15 FFT. ARM9E is twice as fast. > And also want to implement Low pass FIR filter on Real time sound data > before doing FFT. So can this be implemented on ARM 9 platform?????? Your requirements add up to around 10Mhz on an ARM7. Unless power consumption is key, no need for a DSP. Wilco
From: linnix on 30 Jan 2006 18:36
Wilco Dijkstra wrote: > "jagdish.dsp" <jagdish.dsp(a)gmail.com> wrote in message > news:uuSdnROkSq5X0UPeRVn-uQ(a)giganews.com... > > Dear Friends, > > > > In my design I need to develope a DSP algorithm on one DSP processor and > > then to interface same with ARM which is handling all the peripherals. > > > > I am thinking if my DSP algorithm can be implemented on ARM or not...so > > need you help. Right now I am using evaluation board of Texas DSK, so > > taking the input from microphone is given to CODEC(A to D conversion) > > whose sampling freq is 32KHz. > > > > I have to implement 8192 point FFT on real time sound data.... > > An ARM7 takes 2Mhz to perform a 8192 complex Q15 FFT. ARM9E is twice as > fast. That's for doing one per second, which is unlikely for any reasonable algorithm. > > > And also want to implement Low pass FIR filter on Real time sound data > > before doing FFT. So can this be implemented on ARM 9 platform?????? > > Your requirements add up to around 10Mhz on an ARM7. Unless power > consumption is key, no need for a DSP. DSPs are designed exactly for these things. > > Wilco |