HylianSavior 37 Posted August 23, 2011 Share Posted August 23, 2011 After reading some of the Launchpad shield discussion here and while I'm waiting around for my Chronos, I figured I would design a nice Arduino-style "shield" to go on the Launchpad that uses the CC1100 sub-1GHz RF chips to interface with the Chronos. The CC1100 only uses SPI, so the shield should be stackable (in theory). Here's an initial schematic I whipped up- Edit: Gah, I screwed up with the left side headers. No biggie. zborgerd, kenemon, lvagasi and 2 others 5 Quote Link to post Share on other sites
zborgerd 62 Posted August 25, 2011 Share Posted August 25, 2011 Cool!. I have a few of these chips and was thinking about building a prototype. I'd gladly buy a few boards. They should be pretty easy to build with minimal parts. The official modules from TI are overpriced. Quote Link to post Share on other sites
kenemon 29 Posted August 25, 2011 Share Posted August 25, 2011 has anyone seen PCB's that will acomodate the transceivers? I would work on one, but i am not sure how to import the footprint library from the eagle files. Quote Link to post Share on other sites
HylianSavior 37 Posted August 26, 2011 Author Share Posted August 26, 2011 Cool!. I have a few of these chips and was thinking about building a prototype. I'd gladly buy a few boards. They should be pretty easy to build with minimal parts. The official modules from TI are overpriced. I have to order in a batch of 10 if I want these professionally made. I'd be willing to send people some if they pay a few bucks for the board/shipping. The CC1101 can be gotten as a sample from TI. It turns out there's a lot of room left over after putting the chip on... Maybe I'll put on an LCD or some buttons as well. Quote Link to post Share on other sites
kenemon 29 Posted August 26, 2011 Share Posted August 26, 2011 that is a kind offer, but I am looking for/designing a mount for the flex module from LS Research, or similairily the MChip module. Have a look at the deals section, you may want to get yourself a demo of the flex for the price of shipping. KB Quote Link to post Share on other sites
RobG 1,892 Posted August 26, 2011 Share Posted August 26, 2011 has anyone seen PCB's that will acomodate the transceivers? I would work on one, but i am not sure how to import the footprint library from the eagle files. Once I get mine, I will create lbr for it and include in deals thread. Quote Link to post Share on other sites
HylianSavior 37 Posted August 26, 2011 Author Share Posted August 26, 2011 that is a kind offer, but I am looking for/designing a mount for the flex module from LS Research, or similairily the MChip module. Have a look at the deals section, you may want to get yourself a demo of the flex for the price of shipping. KB I already ordered a bunch. Quote Link to post Share on other sites
HylianSavior 37 Posted August 27, 2011 Author Share Posted August 27, 2011 Looks like the CC1100 is depreciated by TI and not recommended for new products. Although I could only find Eagle libraries for the CC1100, I checked and the CC1101 has the exact same pin out and footprint. Quote Link to post Share on other sites
HylianSavior 37 Posted August 27, 2011 Author Share Posted August 27, 2011 Here's an initial layout of what it might look like: Quote Link to post Share on other sites
HylianSavior 37 Posted August 27, 2011 Author Share Posted August 27, 2011 Currently trying to work out how to put in connectivity to the Fraunchpad. It'll probably be through the "RF" connectors. Quote Link to post Share on other sites
HylianSavior 37 Posted September 6, 2011 Author Share Posted September 6, 2011 Found some time to figure out the RF connectors on the Fraunchpad. I couldn't make any sense of the RF1/RF2 connectors, so I ended up using the ezRF (RF3) connector, which isn't broken out on the board. For reference: ezRF on the Fraunchpad: RFPWR - GND P1.0 - P2.0 P1.1 - P2.6 (eUSCI_A1 SOMI / SDO) P1.2 - P2.5 (eUSCI_A1 SIMO / SDI) P2.3 (eUSCI_A1 slave /cs) - P2.7 GND - P4.0 P2.4 (eUSCI_A1 clock) - P4.1 P2.2 - P1.7 P1.6 - P1.3 Fraunchpad: http://www.ti.com/tool/msp-exp430fr5739 ... 57xx-pr-tf Datasheet: http://www.ti.com/lit/ug/slau343/slau343.pdf The Fraunchpad page says it has 1 USCI block, which I'm assuming means it has eUSCI_A0 and eUSCI_A1. Still new to this stuff, so not quite sure. Quote Link to post Share on other sites
HylianSavior 37 Posted September 10, 2011 Author Share Posted September 10, 2011 Possibly the final version of the board, unless I find some glaring issues: I dropped the Fraunchpad idea because there was no good way to attach it to the board... zborgerd 1 Quote Link to post Share on other sites
zborgerd 62 Posted September 10, 2011 Share Posted September 10, 2011 Possibly the final version of the board, unless I find some glaring issues:I dropped the Fraunchpad idea because there was no good way to attach it to the board... [attachment=0]cc1101.png[/attachment] This is a great idea. I have a few of thee chips and can't wait to see the final product. Quote Link to post Share on other sites
RobG 1,892 Posted September 10, 2011 Share Posted September 10, 2011 You may want to make your board little more compressed and use ground planes (on the RF side.) At those frequencies long tracks act as inductors. http://www.ti.com/graphics/tool/CC1101DK868-915.jpg HylianSavior 1 Quote Link to post Share on other sites
HylianSavior 37 Posted September 10, 2011 Author Share Posted September 10, 2011 You may want to make your board little more compressed and use ground planes (on the RF side.)At those frequencies long tracks act as inductors. http://www.ti.com/graphics/tool/CC1101DK868-915.jpg OK, I'll keep that in mind. I haven't done any RF stuff before. Quote Link to post Share on other sites
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