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Re: Re: ISR Overrun

Started by Jeff Brower in TMS320c6x17 years ago 2 replies

Kamran- > i am using a very simple simulink model to generate code for > CCS. Configuration consist of a sin wave of 1 Khz > frequency...

Kamran- > i am using a very simple simulink model to generate code for > CCS. Configuration consist of a sin wave of 1 Khz > frequency directly connected with DAC with sampling frequency > 32 Khz. The program is successfully downloaded to > TMS320C6713 kit and there are no errors in building of program > but upon execution it gives a message in the stdout > window (window tab is presen


Help for FFT point on C6713 platform

Started by suman_urfeeling in TMS320c6x17 years ago 1 reply

Dear All I am using c6713 dsk with CCS software. it's sampling frequency minimum 8KHz , max 99KHz & 256 FFT point. I want to process real signal...

Dear All I am using c6713 dsk with CCS software. it's sampling frequency minimum 8KHz , max 99KHz & 256 FFT point. I want to process real signal 0.5Hz to 10 Hz. Is it possible to process or do FFT for this frequency band ? If not, how can i do it ... Your kind help will be highly appreciated. Regards Gopal Sarkar, Kolkata _____________________________________


Generating square waveform of 40kHz (problem)

Started by angr...@hotmail.co.uk in TMS320c6x17 years ago 4 replies

Hi all I am trying to generate a square wave on TIDSKC6713 (CCS) by modifying a code from Chassaing book (chapter 2). I want to generate the...

Hi all I am trying to generate a square wave on TIDSKC6713 (CCS) by modifying a code from Chassaing book (chapter 2). I want to generate the square wave with variable frequency fo upto 40kHz (by using 96kHz sampling frequency). I am using a buffer of 128 values with half for positive and half for negative amplitudes. I have used two slider GEL; one for variable gain and other for variable frequen...


Re:Unable to perform adaptive filtering in C6713

Started by sham...@yahoo.co.uk in TMS320c6x16 years ago

The most common cause is that your sampling frequency is too high and the > DSP isn't fast enough to keep up. Specially if you use NLMS,...

The most common cause is that your sampling frequency is too high and the > DSP isn't fast enough to keep up. Specially if you use NLMS, which involoves > division by a variable, DSP just hasn't enough computation power. Estimate > the MIPS required by your algorithm first or do LMS first. > > Wei Hi, do you still have your program code for the nlms algorithm. I am trying to modify the syst


RE: C64x+: GSM Receiver Implementation on C64x+

Started by Richard Williams in TMS320c6x16 years ago 1 reply

Manimaran, I'm not familiar with the 'rapid IO' process... For 28 channels, I would have the fpga do all the sampling and have the fpga...

Manimaran, I'm not familiar with the 'rapid IO' process... For 28 channels, I would have the fpga do all the sampling and have the fpga present the data to the DSP. I'm not sure if the selected DSP has an external interface,? if it does, then the DSP can read the finished data as a regular memory access. however, If the selected DSP does not have an external interface, then I would use t...


Verifying FFT Result

Started by B S in TMS320c6x16 years ago 19 replies

Hi Guys, I have computed FFT of 1 KHz sine wave with 1 Vp_p using C6713 DSK, to be sure that FFT algorithm is working fine, I want to verify my...

Hi Guys, I have computed FFT of 1 KHz sine wave with 1 Vp_p using C6713 DSK, to be sure that FFT algorithm is working fine, I want to verify my result. Can you please tell me how can I do this. Sampling frequency used is 8KHz and no. of FFT points are 256. Waiting for your quick response. BR, BS


C6713 MIPS Measurement Issue

Started by xiyo...@yahoo.com in TMS320c6x16 years ago 4 replies

Hi C6x Group members, I'm trying testing the MIPS of C6713 on DSK6713. I have a simple loop-back program to get an audio sample from A/D then...

Hi C6x Group members, I'm trying testing the MIPS of C6713 on DSK6713. I have a simple loop-back program to get an audio sample from A/D then output to D/A. There is some delay between input and output so I can figure out the MIPS. Why can I only execute maximum 3000 times of (a+b) for this delay? So for 8kHz sampling rate, the MIPS is only 3000*8000=24MIPS. Anything wrong with my program? ...


Eb_N0 vs ber for BPSK demodulation

Started by muhammad avais in TMS320c6x15 years ago 2 replies

Dear everybody, I want to plot Eb/N0 vs BER bpsk demodulation in Matlab. I am using BPSK modulated signal @ carrier...

Dear everybody, I want to plot Eb/N0 vs BER bpsk demodulation in Matlab. I am using BPSK modulated signal @ carrier frequencey 8KHz, data rate 1KHz. Sampling rate is set to 96000Hz. I have tried to use 'awgn function' for adding noise. This signal accepts Signal to noise ratio (SNR)in parameters. In order to convert into Eb/N0 for BPSK signal. I have used following relat...


smallest DSP package

Started by Jeff Brower in TMS320c6x15 years ago 5 replies

All- Does anyone know the smallest DSP or microcontroller package that TI has? The algorithm complexity is not high, some 22 kHz sampling...

All- Does anyone know the smallest DSP or microcontroller package that TI has? The algorithm complexity is not high, some 22 kHz sampling rate, some averaging, and some FFTs. -Jeff _____________________________________


External Flash to save big amount of data - C6713

Started by B S in TMS320c6x14 years ago

Hi Guys, I need your help. I have a C6713 DSK connected with ADC via 5-6 Interface Board, the system is sampling time domain signal,...

Hi Guys, I need your help. I have a C6713 DSK connected with ADC via 5-6 Interface Board, the system is sampling time domain signal, performing FFT and saving few values after every 10 ms. At this point, I am using function generator to generate time domain signal and CCS to see the waveform and some C code is writing the required values into text file so I am not running out of memory. But...


interrupt programming in c6713

Started by nikita iyer in TMS320c6x14 years ago 1 reply

Hi all, Is it possible to declare multiple interrupts in 6713. I have been reading about interrupts from Chassings book and according to their...

Hi all, Is it possible to declare multiple interrupts in 6713. I have been reading about interrupts from Chassings book and according to their example of int11 this interrupt will occur at every sampling period. I do not wish these interrupts to occur infinitely. How can I do that. Also I wish to have three different types of interrupts for taking in and out data from mic and line. Any sugge...


Re: AIC23 CODEC sample rates

Started by Jeff Brower in TMS320c6x20 years ago

Rajeshwar- This is a good question for the C6x group, so I have posted for you. -Jeff > I apologize for contacting you directly. > > I...

Rajeshwar- This is a good question for the C6x group, so I have posted for you. -Jeff > I apologize for contacting you directly. > > I request you to answer my following question and I will be obliged to > receive an answer. > > DSK6713 Comes with the AIC23 Codec. The data sheet of this codec gives > the possible sampling rates as 8,8.021,32,44.117,48,88.235,96 kHz. M


About CCS V2.0 error message!

Started by fjulink in TMS320c6x23 years ago 1 reply

Hi all: In my program, I use C call assembly . The function of assembly is control my Analog/Digtal circuit by EMIF. ...

Hi all: In my program, I use C call assembly . The function of assembly is control my Analog/Digtal circuit by EMIF. Those sampling data will be saved at 0x0000 4000~ 0x0000 5000, then the program back to C. Sometimes the program is ok, but so


Pb with PCM3003

Started by nadbret in TMS320c6x23 years ago 2 replies

Hello, I use the C6711DSK and the PCM3003 audiocard. I want to do a FIR filter with a sampling frequency=48 Khz. I use an...

Hello, I use the C6711DSK and the PCM3003 audiocard. I want to do a FIR filter with a sampling frequency=48 Khz. I use an hardware interrupt each time the serial port Mcbsp1 receives a data. Between 2 samples, I do my process (read data from the codec, FIR & wr


asking for RTDX example

Started by piopioi in TMS320c6x23 years ago

Hi, Does anyone have RTDX example for audio signal sampling? I want to use c6711 DSK to sample the input audio from Microphone...

Hi, Does anyone have RTDX example for audio signal sampling? I want to use c6711 DSK to sample the input audio from Microphone and save the sampled data to host PC. Are there such examples or similar stuff? Thank you very much. pio


Playing PCM audio samples

Started by melaniesaayman in TMS320c6x23 years ago 2 replies

Hello all, I am using the 6711 DSK to do mp3 decoding. I want to know how to play the PCM samples. Can I use the ...

Hello all, I am using the 6711 DSK to do mp3 decoding. I want to know how to play the PCM samples. Can I use the TLC320AD535 on the board? I see it has a 8kHz sampling frequency, will this be a problem to play music? Will the sound quality be bad? Or


FFT Spurs

Started by Vetter, Kurt in TMS320c6x23 years ago 1 reply

I have a system where I am sampling at 2.5MHz, and in order to achieve a spectral resolution of 100Hz I am accumulating 25,000...

I have a system where I am sampling at 2.5MHz, and in order to achieve a spectral resolution of 100Hz I am accumulating 25,000 samples. I am transferring the samples via a FIFO in lengths of 1024. After accumulating frames in real time "continuous" I then filter, dec


Sampling Issues

Started by Eric Cheng in TMS320c6x23 years ago

Hi, In regards to a TMS320C6701 EVM/THS1209 daughterboard setup C6701 EVM: ...

Hi, In regards to a TMS320C6701 EVM/THS1209 daughterboard setup C6701 EVM: http://focus.ti.com/docs/pro d/folders/print/tms320c6701.html THS1209 EVM:


2 single input simultaneous sampling

Started by Eric Cheng in TMS320c6x23 years ago

Hi, Using the THS12082, how does this work? I have signals being sampled from AINP and AINM. Register is set to auto read ...

Hi, Using the THS12082, how does this work? I have signals being sampled from AINP and AINM. Register is set to auto read from the 2 channels. I have tried plotting my buffer contents and it corresponds with the 2 signals that are coming in. However, I wish


C6711 external clock

Started by pckashikar in TMS320c6x22 years ago 1 reply

Hi... I am using a 150 MHz C6711 DSP eval. board ... i am trying to interface a TI ADC with it, with sampling freq. of 52 MHz...

Hi... I am using a 150 MHz C6711 DSP eval. board ... i am trying to interface a TI ADC with it, with sampling freq. of 52 MHz ... Does the DSP eval. board give out an external clock and if so @ what frequency ? ... i understand there is a pin on DSP with named ECLKOUT bu