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Hi all, I was interested to read about the DSP system that hangs waiting for serial port data. I have had similar hassles with an ADSP-2181 based system that we are designing here. Sometimes it freezes completely, other times it keeps going, but the incoming serial data turns into garbage and it needs a reset to get the SPORT working again. I thought it was a bug in my code, but it always happened whenever the motor in the fridge turned off :-0 so it had to be interference getting into my mess of lashed together breadboards. I am revising the power supply and grounding just now, which ought to fix it. The 21161 was one of the chips I looked at, but in the end I decided the BGA package was just too much trouble for us to deal with. Plus we didn't really feel like paying $$$ for the VisualDSP software, when we could get all the 21xx tools free. lurk mode on :) Steve Conner Electronic Engineer OptoSci Ltd. http://www.optosci.com/ |
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serial port hang
Started by ●September 25, 2003
Reply by ●September 25, 20032003-09-25
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On Thu, 25 Sep 2003, Steve Conner wrote: > The 21161 was one of the chips I looked at, but in the end I decided the BGA > package was just too much trouble for us to deal with. Plus we didn't really > feel like paying $$$ for the VisualDSP software, when we could get all the > 21xx tools free. I can't do much about the BGA, but the cost of BeastRider tools is a lot lower than VDSP. You can also get OEM boards from a few places, then you don't have to deal with fabbing your own board. > lurk mode on :) Thanks for the story about interference. I think we all get into the "quick and dirty" mode sometimes, and it turns out to be just a touch too dirty :-) Patience, persistence, truth, Dr. mike |
Reply by ●September 25, 20032003-09-25
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At 04:30 AM 9/25/2003, Steve Conner wrote: >Hi all, > >I was interested to read about the DSP system that hangs waiting for serial >port data. I have had similar hassles with an ADSP-2181 based system that we >are designing here. Sometimes it freezes completely, other times it keeps >going, but the incoming serial data turns into garbage and it needs a reset >to get the SPORT working again. > >I thought it was a bug in my code, but it always happened whenever the motor >in the fridge turned off :-0 so it had to be interference getting into my >mess of lashed together breadboards. I am revising the power supply and >grounding just now, which ought to fix it. > >The 21161 was one of the chips I looked at, but in the end I decided the BGA >package was just too much trouble for us to deal with. Plus we didn't really >feel like paying $$$ for the VisualDSP software, when we could get all the >21xx tools free. We have a product that you may be interested in. Our dspblok 21161sm is a small module that includes the ADSP-21161, SDRAM, Flash, EE and a 1.8V switching supply for the core voltage. All connections are made via 2mm headers. You avoid all the BGA difficulties. We also have our dspstak line which support the ADI ADSP-21262, ADSP-21161 & ADSP -2191. dspstak systems separate the I/O functions from the DSP engine (two boards make a "stack"). Details are on our web site. Al Clark Danville Signal Processing, Inc. -------------------------------- Purveyors of Fine DSP Hardware and other Cool Stuff Available at http://www.danvillesignal.com |
