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Hi, I am currently trying to implement a band pass filter to filter out specific frequencies from input data from the microphone. I have visited the sample in the codec.c program ( in TMS3205402 kit). The code to get the data from the microphone is data=*(volatile u 16*)DRR1_ADDR(HANDSET_CODEC); and to convert it back to send to codec is (volatile u 16*)DXR1_ADDR(HANDSET_CODEC)a; But I have problems in : doing a filter function on data. COuld anyone please give any solutions or ideas to a simple band pass filter transfer function I could try out. Thank you. |
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Simple Band Pass Filter Transfer Function
Started by ●December 6, 2001
Reply by ●December 7, 20012001-12-07
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Hello, The CD ROM with your DSK comes with the TI DSP Library Programmer's reference routines installed in a directory called DSPLIB (you'll probably need to download updates via the web (as my DSPLIB on the CD ROMs I got were one rev old). Look at SPRU518 which has a description of each routine, there are several filters. I have used iircas51 and got correct frequency bandpass results on my 5402 DSKs. Beware however that SPRU518 has many (MANY!!) typographical errors. Regards, -Todd Todd Goldsmith Principal Engineer Acoustic Technologies, Inc. 1620 South Stapley Drive, Suite 201 Mesa, Arizona 85204 Ph (480)507-4378 Fax (480)507-4399 -----Original Message----- From: shoveyourass [mailto:] Sent: Thursday, December 06, 2001 3:19 PM To: Subject: [c54x] Simple Band Pass Filter Transfer Function Hi, I am currently trying to implement a band pass filter to filter out specific frequencies from input data from the microphone. I have visited the sample in the codec.c program ( in TMS3205402 kit). The code to get the data from the microphone is data=*(volatile u 16*)DRR1_ADDR(HANDSET_CODEC); and to convert it back to send to codec is (volatile u 16*)DXR1_ADDR(HANDSET_CODEC)a; But I have problems in : doing a filter function on data. COuld anyone please give any solutions or ideas to a simple band pass filter transfer function I could try out. Thank you. _____________________________________ 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/c54x Other Groups: http://www.dsprelated.com ">http://docs.yahoo.com/info/terms/ |
