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see "help with data loger" — Parallax Forums

see "help with data loger"

max21max21 Posts: 6
edited 2009-11-15 18:13 in Propeller 1

Hello to all,
·
I am not sure if this is the place to do this, and if not I sincerely apologize.

I am a small (micro) business that is currently developing products for the US Forestry Service, and I am in need of help. One·of the projects is a stand alone data recorder that utilizes the Propeller Chip. My business partner·has·been·programming it with only pervious experience from SX·Stamp projects.·
·
I am looking for an imbedded systems·programmer with instrumentation experience,·who can assist us in·bringing the operating level of the Data recorder up to where it should be·via efficient code, calibration corrections, and user interface friendliness.

We have the compiler for C as well.

Compensation would be dependent on knowledge and participation level.

Any direction would be·appreciated.··
·


Post Edited (max21) : 11/15/2009 6:24:02 PM GMT

Comments

  • SRLMSRLM Posts: 5,045
    edited 2009-11-04 22:53
    If you post your code and a schematic on the forums with a question, you can get help for free...
  • Steph LindsaySteph Lindsay Posts: 767
    edited 2009-11-05 00:03
    Hello Max21,

    You might also refer to the list of Parallax Authorized Consultants on our website. There is a section specifically for Propeller consultants.

    -Stephanie Lindsay
    Editor, Parallax Inc.
  • max21max21 Posts: 6
    edited 2009-11-15 05:35
    Many thanks for the replys.

    We are currently trying to get the 2nd·version of the Flight Data Recorder to operate properly.

    Attached is the code that has been tried to date with limited sucess. We are·updating the schematics to reflect the latest changes to the design and will post them asap.

    We·are recording the data from 5 instruments·to on-board memory, and then transferring it to a memory stick via the Parallax memory dataloger.·This process·is currently giving us the most trouble. It seems to·run fine for a short while and then it slows to a crawl. The·baud rate seems to·influence the·condition. We are monitoring the data with a two·channel oscilloscope. The data waves look good when it is communicating, it just won’t work consistently.
    ·
    Another issue·we are·having is, if the speed of the ADC·changes (sample rate and/or the clock delay), the bit value of the·analog sensors·change·greatly.
    ·
    We are using·an·15lb absolute pressure sensor for altitude (MPX4115A), the air speed is sensor is (1Mbar-D-4V), the ADC we are·using is a (MAX1416EPE), the 3 axis accelerometer is (LIS3LV02DQ) on a brake out board from sparkfun.com, the tilt compensated compass is (HMC6343) also from SparkFun,·finally a·Temp/Humid sensor (SHT-15) from sensirion.com.· The Parallax Memory stick dataloger is (#27937). The analog instruments have a dedicated power supply as well.
    ·
    Spin is a new language for us (I say us as I am not the programmer). Any guidance, comments, etc would be greatly appreciated.
    ·
    ·
    ·
    spin
    spin
    !!TOP!!_FDR_111509.spin
    22K
    spin
    spin
    USBdrive_mod.spin
    9K
    spin
    spin
    Basic_I2C_Driver.spin
    16K
    spin
    spin
    FullDuplexSerial.spin
    8K
    spin
    spin
    hmc6343Object.spin
    10K
  • SRLMSRLM Posts: 5,045
    edited 2009-11-15 09:18
    Please post your request for help in a new (appropriately titled) thread. Post all your code at once by posting the zip created by the Propeller archive function: http://forums.parallax.com/attachment.php?attachmentid=64761

    This will help keep the forum organized and a faster response to your question.
  • Bill HenningBill Henning Posts: 6,445
    edited 2009-11-15 14:29
    This is likely due to writing to the flash drive at a rate greater than it can do sustained writes and/or the flash drive slowing down due to having to erase blocks to make space.
    max21 said...
    We are recording the data from 5 instruments to on-board memory, and then transferring it to a memory stick via the Parallax memory dataloger. This process is currently giving us the most trouble. It seems to run fine for a short while and then it slows to a crawl. The baud rate seems to influence the condition. <SPAN style="FONT-SIZE: 10pt; COLOR: black; FONT-FAMILY: Verdana">We are monitoring the data with a two channel oscilloscope. The data waves look good when it is communicating, it just won’t work consistently.
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  • Mike HuseltonMike Huselton Posts: 746
    edited 2009-11-15 16:36
    What Bill said...

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    JMH
  • max21max21 Posts: 6
    edited 2009-11-15 18:13
    As requested, I started a new thread titled·"Help with Data Recorder". If someone can transfer the posts to the new thread that would be fantastic.
    ·
    http://forums.parallax.com/showthread.php?p=856179

    Many thanks.
    ·
    ·
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