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Sterny

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  1. Like
    Sterny reacted to spirilis in Questions on SFP transceivers in hobbyist projects.   
    Working on a DipTrace footprint & schematic component for the SFP cage and edge connector (going to combine them into the same part since the alignment between the two is supposed to be so tight).

  2. Like
    Sterny got a reaction from zeke in Questions on SFP transceivers in hobbyist projects.   
    @@spirilis
     
    Wow, how exciting it is that you decided to resurrect this thread.
     
    I had a quick look at your links.  So along with TI LVD driver chip, and the PHY you linked, is it essentially routing the control and signaling to some GPIOs on a launchpad MCU?  And with that, you'd be able to drive the SFP?
  3. Like
    Sterny reacted to spirilis in Questions on SFP transceivers in hobbyist projects.   
    I see SFP cage slots aren't hideous - http://www.mouser.com/ProductDetail/Amphenol-Commercial-Products/U77-A1114-100T/?qs=sGAEpiMZZMtLo%252bUrTGGA8Qu%252bjOiyxwrr - and the edge connectors - http://www.mouser.com/ProductDetail/Amphenol-Commercial-Products/UE75A206000T/?qs=sGAEpiMZZMvlX3nhDDO4ADdPO33nqrQcj0jVg%252b39E7Q%3d - also not too expensive.
     
    Damn.  I might have to get this rolling soon.
  4. Like
    Sterny reacted to spirilis in Questions on SFP transceivers in hobbyist projects.   
    Looking up the datasheet for some of the SFP's I have laying around (potentially bad)-
     
    https://www.finisar.com/sites/default/files/downloads/finisar_ftlf8524p2xny_4.25gbs_rohs_compliant_short-wavelength_sfp_transceiver_product_specification_1.pdf
     
    Finisar FTLF8524P2BNV (from a 4Gbps Brocade ED-48000 fiberchannel switch)
     

     
    Sounds like there are different speed-related modes that are switchable via I2C (OR a GPIO toggle) but there is no "Min" in the bitrate...
  5. Like
    Sterny reacted to chillyjee in Adafruit Bluefruit LE SPI friend with MSP432   
    I found the solution, the data wasn't transmitted correctly initially so there was nothing on the buffer and so the process was stuck in an available()==0 loop.
     
    I finished to code this driver completely (I think ?), here is a link for you folks :
    https://github.com/chillyjee/BluefruitSPI
     
    Developed for MSP432 but surely compatible with any MSP43x platform 
     
    Leave any questions.
  6. Like
    Sterny reacted to bluehash in TI Store - $10 - Audio Capacitive Touch BoosterPack   
    I think the kit ships with a pre-programmed MSP430G2553 to replace the one on the G2 Launchpad.
    The Launchpad does cap touch sensing and sends commands to the C5000 such as pause, stop, play and volume.
  7. Like
    Sterny got a reaction from energia in MSP432 LP with xbee devices not transmitting or receiving   
    I've only used the S2 parts, but think the S1 used the AT firmware - if it was a S2, I'd suggest making sure you have the appropriate firmware installed.
     
    Are you using the sparkfun explorers to connect to your PC?  Can you a use a serial terminal program like putty/screen and get the two chatting by connecting a terminal to comX and another instance to comY, where x and y are the comports of the FTDI on the sparkfun?
     
    I'm not clear what you mean when you say you can see failing show up on the comport - do you mean the MSPs com/serial port?
     
    I've only played with xbee's on Arduino, but there's a limitation on AVRs with only one hardware UART.  You needed to define two pins with software serial to bitbang the connection to the xbee.  You then can watch the MCUs serial connection, on say pins 0 and 1, and connect the xbee to software serial pins 2 and 3.  
     
    The fact that you can see 'Failing' somewhere means to me that you're not serial printing to the xbee - just the USB uart connected to the MSP432.
  8. Like
    Sterny reacted to pine in LaunchPad based TI Innovator System   
    https://education.ti.com/en/us/products/micro-controller/ti-innovator/tabs/overview

    A new dev kit with RGB LED, light sensor, talks to TI calculators, and a nice enclosure!
     
    Available Fall 2016
  9. Like
    Sterny got a reaction from Serginho in Questions on SFP transceivers in hobbyist projects.   
    I work in the storage industry, and my shop has a large amount of Fibre Channel and Gigabit Ethernet SFPs that are getting replaced and many are getting scrapped.  I was working in the lab today and started wondering if any could be adapted in someway to get a couple MCU dev boards talking.
     
    I did manage to find a datasheet after some quick googling - http://www.avagotech.com/docs/AV02-0671EN
     
    So it's clear to me that at my particular stage in learning, interfacing with the board is beyond my capability.  But as I continue my education, I think at some point I'd like to take a stab at it.
     
    I was wondering:
     
    1.  Have you come across any projects or libraries which attempt to interface older SFPs with more modern MCU dev boards?
     
    2.  What are your general thoughts about this?  Is this a fools errand? I understand it's not very practical, but I thought it would be pretty cool to get two MCUs talking to each other and being able to dig deep in how it's actually accomplished.  
     
    Working in the data storage industry, I'm used to looking at FC analyzer traces and working problems within the protocol, and dump data from the end device products.  But as I get more and more into the actual electronics involved, I start trying to come up with different avenues of exploration.
     
    Thanks for reading!
     
    Regards,
    Sterny
  10. Like
    Sterny got a reaction from zeke in Questions on SFP transceivers in hobbyist projects.   
    @@zeke,
     
    Thank you again.  I cannot express in a forum post how grateful and appreciative I am for you taking the time to point me in the right direction on how to begin my research on this project.  Awesome!!
     
    @@spirilis,
     
    Wow, after reading a lot of your posts, I had always assumed you were a design engineer at your day job.  Or, do you do storage admin work in addition to engineering there?
     
    I noticed that you've designed some boosterpack boards - based on the information @@zeke provided, how big of a lift would a SFP booster pack be?  I'm just curious about some context from someone who has actually gone through that process.
     
    Regards,
    Sterny.
  11. Like
    Sterny got a reaction from zeke in Questions on SFP transceivers in hobbyist projects.   
    @@spirilis,
     
    Heh - yeah, SFP Boosterpack's - for when you need to talk to a MCU 300 meters away!  
     
    I guess though, maybe one practical application would be a SFP tester, or maybe even a cable tester.  But of course there are many products already out there that do that.
     
    For me though, it's the journey I'm interested in, and as this technology is related to what I do for living, dipping my toe in a bit deeper couldn't hurt.  Plus, this type of media is where everything is at when it comes to device to device connectivity.  Copper throughput and distance limitations are pretty prohibitive unless you're attaching to the top of the rack.  
     
    v2 will support QSFP's.  
     
    Thanks again for all the response.
     
    -Sterny
  12. Like
    Sterny got a reaction from spirilis in Questions on SFP transceivers in hobbyist projects.   
    @@spirilis,
     
    Heh - yeah, SFP Boosterpack's - for when you need to talk to a MCU 300 meters away!  
     
    I guess though, maybe one practical application would be a SFP tester, or maybe even a cable tester.  But of course there are many products already out there that do that.
     
    For me though, it's the journey I'm interested in, and as this technology is related to what I do for living, dipping my toe in a bit deeper couldn't hurt.  Plus, this type of media is where everything is at when it comes to device to device connectivity.  Copper throughput and distance limitations are pretty prohibitive unless you're attaching to the top of the rack.  
     
    v2 will support QSFP's.  
     
    Thanks again for all the response.
     
    -Sterny
  13. Like
    Sterny got a reaction from spirilis in Questions on SFP transceivers in hobbyist projects.   
    I work in the storage industry, and my shop has a large amount of Fibre Channel and Gigabit Ethernet SFPs that are getting replaced and many are getting scrapped.  I was working in the lab today and started wondering if any could be adapted in someway to get a couple MCU dev boards talking.
     
    I did manage to find a datasheet after some quick googling - http://www.avagotech.com/docs/AV02-0671EN
     
    So it's clear to me that at my particular stage in learning, interfacing with the board is beyond my capability.  But as I continue my education, I think at some point I'd like to take a stab at it.
     
    I was wondering:
     
    1.  Have you come across any projects or libraries which attempt to interface older SFPs with more modern MCU dev boards?
     
    2.  What are your general thoughts about this?  Is this a fools errand? I understand it's not very practical, but I thought it would be pretty cool to get two MCUs talking to each other and being able to dig deep in how it's actually accomplished.  
     
    Working in the data storage industry, I'm used to looking at FC analyzer traces and working problems within the protocol, and dump data from the end device products.  But as I get more and more into the actual electronics involved, I start trying to come up with different avenues of exploration.
     
    Thanks for reading!
     
    Regards,
    Sterny
  14. Like
    Sterny reacted to Fmilburn in TI-PLABS-AMP-EVM - TI's OpAmp eval kit question   
    @@Sterny There is a tutorial on how to use your bench supply for +/- voltage here
     
    Thanks for the information on Mastech @@bluehash.  I have thinking about a bench supply and wasn't aware of them.
  15. Like
    Sterny got a reaction from Fmilburn in TI-PLABS-AMP-EVM - TI's OpAmp eval kit question   
    Hi Fmilburn,
     
    Thank you so VERY much for the link - this is exactly what I needed to know!
     
    I received a pm asking me for the coupon code to receive 80% off, bringing the 200 kit down to a more manageable $40.  For everyone's benefit that is interested, here's the code I used:
     
    ENLABS
     
    It says while supplies last, and limits it to quantity 1.
     
    Regards,
    Sterny
  16. Like
    Sterny got a reaction from phenyl in TI-PLABS-AMP-EVM - TI's OpAmp eval kit question   
    Hi Fmilburn,
     
    Thank you so VERY much for the link - this is exactly what I needed to know!
     
    I received a pm asking me for the coupon code to receive 80% off, bringing the 200 kit down to a more manageable $40.  For everyone's benefit that is interested, here's the code I used:
     
    ENLABS
     
    It says while supplies last, and limits it to quantity 1.
     
    Regards,
    Sterny
  17. Like
    Sterny got a reaction from phenyl in TI-PLABS-AMP-EVM - TI's OpAmp eval kit question   
    Hi bluehash,
     
    Thank you very much for your response.
     
    Also, thanks for the welcome.  I've been lurking here for a few months after getting turned on to the launchpad kits.  It's really made me a big fan of TI - the prices are great, and the documentation that TI provides seems to be first class as compared to the other ecosystems out there.  I also appreciate that they still make alot of PDIP basic logic gates - really helpful for me as I get more and more knowledge under my belt.
     
    This is a great forum and blog BTW - I appreciate your posts about bargains out there
     
    So as it turns out, after reading your comment, I did some research on my current bench power supply.  I have a Rigol DP832.
     
    A thread over at the eevblog mentions that I can use it to get negative voltages.   http://www.eevblog.com/forum/testgear/rigol-dp832-negative-voltages/
     
    Clearly I have some stuff to learn about the basics, which is partly why the opAmp kit appealed to me.
     
    While I believe I understand how I can wire the circuit to get +/- voltages, I'm not really clear about the ground connection.  Seems to me that it's referencing earth ground, but I'm missing some fundamentals on this part.
     
    Best regards,
    Sterny
  18. Like
    Sterny got a reaction from phenyl in TI-PLABS-AMP-EVM - TI's OpAmp eval kit question   
    TI sent me an email announcing 80% off their TI-PLABS-AMP-EVM kit.
     
    http://www.ti.com/tool/ti-plabs-amp-evm
     
    I decided to pick one up as I thought it would be a good opportunity to follow their course and have something to experiment with.  I have my own test equipment, so I'm not going to get National Instruments $2000 lab kit.
     
    Looking through the EVM user's guide (http://www.ti.com/lit/ug/sbou150a/sbou150a.pdf) I see that it has power connections that can be supplied by either the NI kit, or your own power supply.  It shows using a 20v positive, and a 20v negative rail along with ground.
     
    The reason for this post is to request a recommendation on what kind of power supply I should purchase to provide the board both positive and negative leads.
     
    Any thoughts?
     
    Keep in mind I'm just a hobbyist getting into this and have only been dealing with voltages from 0.
     
     
  19. Like
    Sterny got a reaction from bluehash in TI-PLABS-AMP-EVM - TI's OpAmp eval kit question   
    Hi Fmilburn,
     
    Thank you so VERY much for the link - this is exactly what I needed to know!
     
    I received a pm asking me for the coupon code to receive 80% off, bringing the 200 kit down to a more manageable $40.  For everyone's benefit that is interested, here's the code I used:
     
    ENLABS
     
    It says while supplies last, and limits it to quantity 1.
     
    Regards,
    Sterny
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