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Hello all: I have been observing very random memory errors in the data I am writing out of a 6711-DSP's (external) SDRAM. The few culprits that I can shortlist are: * EDMA transfers into circular buffer (in SDRAM) holding data for the PCI bus to take * Board-to-host transfer * EDMA transfers writing/reading data to/from process memory (L2 cache). There is a huge number of them. Has anyone faced similar problems with memory in such an environment ? I would really appreciate it if someone can point me to the most likely cause of this corruption. I have a few more symptoms that I can link to your suggestion to see where it takes me. Thank you very much in advance, Regards Anand |
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Memory problems
Started by ●May 7, 2003
Reply by ●May 8, 20032003-05-08
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Akalya, I assume you are using Cache_flush() correctly ? Be sure you understand what it does and why you need to use it. - Andrew E. At 09:10 PM 5/7/2003 +0000, akalya wrote: >Hello all: > >I have been observing very random memory errors in the data I am >writing out of a 6711-DSP's (external) SDRAM. The few culprits that I >can shortlist are: > * EDMA transfers into circular buffer (in SDRAM) holding data for >the PCI bus to take > * Board-to-host transfer > * EDMA transfers writing/reading data to/from process memory (L2 >cache). There is a huge number of them. > >Has anyone faced similar problems with memory in such an >environment ? I would really appreciate it if someone can point me to >the most likely cause of this corruption. I have a few more symptoms >that I can link to your suggestion to see where it takes me. > >Thank you very much in advance, > >Regards >Anand > >_____________________________________ >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 >">http://docs.yahoo.com/info/terms/ |
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Reply by ●May 11, 20032003-05-11
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Hello All! Just for interest: can anyone explain how Code Composer puts breakpoints, i.e. what feature of the architecture does it use to do it? -- Best regards, Michael Kapralov mailto: |
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Reply by ●May 12, 20032003-05-12
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wrote: >Hello All! > > Just for interest: can anyone explain how Code Composer puts > breakpoints, i.e. what feature of the architecture does it use to do > it? That is not docummented by TI. If you set a breakpoint on an instruction in CCS and then view the corresponding memory as data there will be no visible difference. However, if you set a breakpoint , have some different code copy the memory with the breakpoint in it to a different memory location and then view it you will find that the most significant bit of the instruction is set. If you set this bit yourself to hardcode a breakpoint CCS will be confused and possibly crash. /Regards, P Ligander |
