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I've been evaluating the Blackfin using the EZ-KIT and a JTAG ICE.
Looks good on paper, but I have run into a problem. MemDMA to L2 SRAM doesn't seem to work. DMA to other destinations works, but not L2. It partially completes and then locks up the DMA engine. Is this a known problem ? That would be a bummer since the application more or less hinges on the DMA working. Anyone else find the USB debugger that comes with the EZ-KIT is ridiculously slow ? _________________________________________________________________ Add photos to your messages with MSN 8. Get 2 months FREE*. http://join.msn.com/?pageatures/featuredemail |
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MemDMA Problem in Blackfin 21535 ?
Started by ●January 24, 2003
Reply by ●January 24, 20032003-01-24
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--On Friday, January 24, 2003 2:39 AM +0000 Honathon Tuttle <> wrote: > MemDMA to L2 SRAM doesn't seem to work. DMA to other destinations works, > but not L2. > It partially completes and then locks up the DMA engine. > Is this a known problem ? That would be a bummer since the application > more or less hinges on the DMA working. Don't know about the Blackfin, but the 21065L was full of silicon bugs when first released. Check the errata for the Blackfin version on your EZ-Kit. It should be somewhere on ADI's website. > Anyone else find the USB debugger that comes with the EZ-KIT is > ridiculously slow ? Haven't tried it yet. I suppose they're trying to encourage you to buy one of their "real" debuggers. ;) FWIW, I just got the new high-speed PCI ICE today and am seeing a 30% improvement in download speed over the Summit-ICE for 21065L code (about 32k instruction words, mostly in external SDRAM.) |
Reply by ●January 24, 20032003-01-24
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Hai, May I know from where you are transfering the Data to L2 SRAM. Is it from External Memory? What is the Size of Data that you transfer at a time? We had tried it, I could see no problem. Trasnsferred the data from External SDRAM to L2 SRAM. Buffer Size is 512. Regards, Kums -----Original Message----- From: Honathon Tuttle [mailto:] Sent: Friday, January 24, 2003 8:09 AM To: Subject: [adsp] MemDMA Problem in Blackfin 21535 ? I've been evaluating the Blackfin using the EZ-KIT and a JTAG ICE. Looks good on paper, but I have run into a problem. MemDMA to L2 SRAM doesn't seem to work. DMA to other destinations works, but not L2. It partially completes and then locks up the DMA engine. Is this a known problem ? That would be a bummer since the application more or less hinges on the DMA working. Anyone else find the USB debugger that comes with the EZ-KIT is ridiculously slow ? _________________________________________________________________ Add photos to your messages with MSN 8. Get 2 months FREE*. http://join.msn.com/?pageatures/featuredemail _____________________________________ 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://groups.yahoo.com/group/adsp Other Groups: http://www.dsprelated.com/groups.php3 ">http://docs.yahoo.com/info/terms/ |
