RobG 1,892 Posted July 21, 2012 Share Posted July 21, 2012 MSP430F5510 development board, inspired by xpg, with LaunchPad compatible headers. pine, Automate, SirZusa and 9 others 12 Quote Link to post Share on other sites
xpg 127 Posted July 21, 2012 Share Posted July 21, 2012 That looks really sweet. Quote Link to post Share on other sites
GeekDoc 226 Posted July 22, 2012 Share Posted July 22, 2012 That's dead sexy, Rob. Where do you find the time to do all these amazing boards!? Quote Link to post Share on other sites
RobG 1,892 Posted July 25, 2012 Author Share Posted July 25, 2012 USB tests completed. Should I make this board available bare or preassembled? Quote Link to post Share on other sites
rbasoalto 10 Posted July 25, 2012 Share Posted July 25, 2012 Looks like an amazing alternative to LP when you need USB or more pins, flash, ram. Nice work! Just noticed you criss-cross the USB D+/D- lines with a via. It has been discussed elsewhere in this forum that it's better not to (although I don't know if it's a real problem or just exaggeration). One solution is to enter through the corner and connect to the pads from the "inside" of the chip. EDIT: Maybe a CCW 45 Quote Link to post Share on other sites
RobG 1,892 Posted July 25, 2012 Author Share Posted July 25, 2012 This way, they are (almost) identical in length and I don't think crossing them is that bad, think of it as a twisted pair. Quote Link to post Share on other sites
rbasoalto 10 Posted July 25, 2012 Share Posted July 25, 2012 I found the discussion, in SA's F5529 breakout thread: http://www.43oh.com/forum/viewtopic.php?p=11400#p11400 I think the bigger issue is with vias killing the impedance-controlled closely-routed tracks. It probably will work just like that, but it's worth taking a look at. Quote Link to post Share on other sites
Automate 69 Posted July 25, 2012 Share Posted July 25, 2012 Should I make this board available bare or preassembled? My vote is for preassembled. Quote Link to post Share on other sites
SugarAddict 227 Posted July 25, 2012 Share Posted July 25, 2012 Yeah, there's some nice tidbits in that 5529 thread on usb traces. I managed to meet all the guidelines on the 5529 board... wasn't too hard. You might be more constrained with board size limitations though, still worth a shot if you feel like trying Quote Link to post Share on other sites
RobG 1,892 Posted July 25, 2012 Author Share Posted July 25, 2012 The design guide tells you to limit the number of vias, but they are OK. Route the high-speed USB signals using a minimum of vias and corners. This reduces signal reflections and impedance changes. I did consider doing something like below, but I am not sure if this will be any better. Placing 5510 or USB on the bottom layer would probably be the best solution here. Are there any software USB diagnostic tools I could use that will show mi transfer errors? Also, relative to some other designs out there, I don't think my design is that problematic. rbasoalto 1 Quote Link to post Share on other sites
rbasoalto 10 Posted July 25, 2012 Share Posted July 25, 2012 Yeah, I guess it's okay. As for assembly, I'd say partially assembled. Better leave the headers unpopulated, for those opting for male or female headers. LDO is not always necessary (when usign internal LDO), but since it can be jumper-disabled, better put it there Quote Link to post Share on other sites
RobG 1,892 Posted July 25, 2012 Author Share Posted July 25, 2012 I was thinking of assembling SMD parts only, no headers and probably no switches. Rickta59 1 Quote Link to post Share on other sites
xpg 127 Posted July 25, 2012 Share Posted July 25, 2012 USB tests completed. Should I make this board available bare or preassembled? I vote for bare board. But I will get a couple anyways :-) Quote Link to post Share on other sites
RobG 1,892 Posted July 25, 2012 Author Share Posted July 25, 2012 USB to UART example with 5110 Booster Pack Programming using LaunchPad bluehash and Nytblade 2 Quote Link to post Share on other sites
rbasoalto 10 Posted July 26, 2012 Share Posted July 26, 2012 Good work! Do you have the USB-UART code in hand? I'm intending to learn to use the USB peripheral in F5510/5529 BTW Nice sawn off LP Ever thought on putting female headers on the underside of the LP for programming boards like this? Quote Link to post Share on other sites
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