Prof. Chassaing: Thanks for your help. I was able to get the 48 kHz sampling rate :) . I have a small question concerning the other jumpers on the daughter card. I read in the Audio_Daughter_Card_Users_Guide that jumpers JP7, JP8, JP9, and JP10 should not be connected. Is this remark also misleading or should they also be connected? What are they used for? Any help will be greatly appreciated. Att., Juan Torres --- chassaing <> wrote: > Trutano: > > Try the following settings: > > JP11(3-4), JP12(1-2), JP4(5-6), JP5(3-4), JP6(3-4). > Pin 1 is on the upper > left of JP4, but on the lower right of JP5,6,11, > and12. Default settings > are generalyy not correct. > > JP5(1-2) for variable rate, JP5(3-4) for the fixed > rate of 48kHz (see page > 310). Good luck. > > Rulph Chassaing > > ----- Original Message ----- > From: "trutano" <> > To: <> > Sent: Tuesday, April 13, 2004 12:12 AM > Subject: [c6x] Problems and Questions with PCM3003 > > Hi, > > > > I am currently working with the C6711 DSK and the > PCM3003 Daughter > > Card. I am using Chassaing's Code "loop_intr_pcm" > located on his > > book "DSP Applications using C and the TMS3206x > DSK" as reference. My > > questions > > are: > > > > 1) I have tried to get 48kHz sampling frequency > for an application > > with one input and one output and when my Daughter > Board is in Fixed > > Sampling Frequency Mode (JP5), the sampling > frequency I get is 24kHz. > > Is it possible to get 48kHz sampling frequency per > channel using > > the "loop_intr_pcm" code or do I need to make some > modifications to > > the code? > > My jumper settings on the PCM3003 daughter card > are: > > JP11: 1-2, JP12:1-2, JP6:5-6, JP7:ON, JP8:ON > > > > 2) When I put JP5 in 3-4, I get 24kHz sampling > frequency. If I put it > > on 1-2, I get half the sampling frequency of the > Fs variable defined > > in my code. I read the > Audio_Daughter_Card_User_Guide, and it seems > > to me that it doesn't match with the results I > have found. Is there > > anything wrong with the diagram or do I have a > problem with my > > Daughter Card? (I know the sampling frequency > because I can measure > > the folding frequency (Fs/2) of the ADC with the > help of an > > ocsilloscope.) > > > > 3) I need to work on an application where the > output sampling > > frequency needs to be about 16 smaller than the > input sampling > > frequency (Finput > Foutput). Does the PCM3003 > support different > > sampling frequencies between the input channel and > output channel? > > > > Any help will be greatly appreciated. > > > > Att., > > > > Juan A. Torres > > > > > > > > > > > > _____________________________________ > > Note: If you do a simple "reply" with your email > client, only the author > of this message will receive your answer. You need > to do a "reply all" if > you want your answer to be distributed to the entire > group. > > > > _____________________________________ > > About this discussion group: > > > > To Join: Send an email to > > > > > To Post: Send an email to > > > > To Leave: Send an email to > > > > > Archives: http://www.yahoogroups.com/group/c6x > > > > Other Groups: http://www.dsprelated.com > > > > Yahoo! Groups Links > > > > > > > > > > > > _____________________________________ > Note: If you do a simple "reply" with your email > client, only the author of this message will receive > your answer. You need to do a "reply all" if you > want your answer to be distributed to the entire > group. > > _____________________________________ > About this discussion group: > > To Join: Send an email to > To Post: Send an email to > > To Leave: Send an email to > Archives: http://www.yahoogroups.com/group/c6x > > Other Groups: http://www.dsprelated.com > > Yahoo! Groups Links > __________________________________ |