Programming and Web Development Forums - Digital Signal Processing - Digital Signal Processing using computers.
Hi, I was asked to do some research on this "hamming code" and compare its efficiency with huffman coding? But i remember from my class and context book, hamming code is some kind of error correction channel coding scheme. As I right? if yes, how can I compare the efficiency of a channel coding to source coding? I have already thrown away all my knowledge from classroom. Thanks
Hi, I am trying to setup a 2812 to take A to D readings. I have the ADC setup for 10 readings (MAXCONV=9), cascaded sequencer, continuous run, and to branch to the ADC interrupt at the EOS (end of sequence). When the program branches to the interrupt routine, I read and store the result registers to variables. My problem is that the result registers never change their value even when I vary the applied signal between 0V and 3V. Any suggestions? Also, I have the ADC set to suspend mode0 where an emulation suspend is ignored (i.e. the ADC continues to sample even when I hit a breakpoint?). Would this have anything to do with it? Alex
Hello ! Would someone be able to explain me how to calculate the execution time o a NOP instruction when it is executed into flash and into external ram of DSP TI 2812? Is it normal to have a time more important (2*) into ram than into flas ? Is it normal to see that a change into the configuration of XINTF doesn' change the execution time ? Thanks a lot for your answers
Hi all, This is regarding flashing a code in 2812 processor from TI. I tried flashing a sample code from spectrum digital using the SDFlash utility. I was able to flash it a couple of times, but after that it was consistently showing errors in flashing. Actually the probelm was with locking and unlocking the device using CSM. The important point to be noted as far as flashing is concerned is that the device has to be reset once ( soft reset thru the SDFlash utility ) and then flashed, but not the reverse. In case u accidently reset the device after flashing, it places 0000 in all the password locations and locks the device permanently and after that ur device cannot be debugged or reprogrammed. In case u r using an eZDSP kit from spectrum digital, u can download ur code through JTAG and continue working with onchip and off chip RAM, but secure RAM locations and FLASH memory cannot be touched. More information on the CSM can be obtained from the TI user guide SPRU078A.
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