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LAUNCHXL-F28069M: How to add CC4000 GPS EM to my project with Lauchxl-f28069m and 2 drv8301

Miguel cosmes
Intellectual 310 points
Part Number: LAUNCHXL-F28069M
Other Parts Discussed in Thread: MOTORWARE, DRV8301, LVSERVOMTR

Hi everyone,

I'm working with motorware in Lauchxl-f28069m and 2 drv8301 to control 2 lvservomtr, but i need to add a GPS to my project, do you think is it possible to add this GPS module, i think there some problems with the number of pins available because of the dvr8301, i'm also cosidering this RTC module, Please any suggestions will be appreciated

  • 0
    Guru 192875 points

    Hi Miguel,

    Miguel cosmes said:
    do you think is it possible to add this GPS module

    First of all which communication protocol you plan to use to interface GPS module? SCI or SPI?

    Regards,

    Gautam

  • 0 in reply to Gautam Iyer
    Intellectual 310 points

    It looks like i just have available I2C because of the pins used by the drv-8301

  • 0 in reply to Miguel cosmes
    Guru 30330 points
    Miguel,

    You still have an entire set of Launchpad headers that are unconnected. If you use one Boosterpack site for the DRV8301, the other set is not blocked. in this case, you still have SPI, SCI, or UART available for your GPS module.
  • 0 in reply to Mark Labbato
    Intellectual 310 points
    No, because i have to connect 2 drv8301.
  • 0 in reply to Miguel cosmes
    Guru 30330 points
    Miguel,

    Ah, yes, I see that now. So it doesn't look like there is a plug-and-play way to get all three of these boards to work together. You will need to do an audit of the unused Boosterpack headers to find SCI/UART pins that are available. I did a brief check and it looks like SCITXDB is available on GPIO22 and GPIO40. SICRXDB is available on GPIO23 and GPIO44. I don't believe that these pins are used by the DRV kit but they are in the wrong place for the GPS module. Because if this, you can create either a custom translator board or just a simple wiring harness to develop your application with all three modules connected. Alternately, you can develop/evaluate using one DRV board and the GPS module as a proof of concept, and then create your own custom board for the application.

    The launchpad kits definitely have their trade-offs. They are really great at getting people started with interfacing C2000 with many external devices, but they can be the limiting factor when trying to develop an entire system. To get the best performance in your end application, you need to develop your own customized hardware.
  • 0 in reply to Mark Labbato
    Intellectual 310 points
    Thank you for your help,
    So i will have to connect UART RX with SCITXDB and UART TX with SCIRXDB ,right?, GPS PPS OUT and FIX AVAILABLE it could be NC and PUSH TO FIX and GPS RESET set to HIGH through a GPIO each one?
  • 0 in reply to Miguel cosmes
    Guru 30330 points

    Miguel,

    It looks like your suggestions are correct. SCITX would connect to GPS_RX and SCIRX would connect to GPS_TX. It does look like the other GPS signals are basic IO control so a standard GPIO should be good. 

  • 0 in reply to Mark Labbato
    Intellectual 310 points
    Thanks for you help Mark,
    Do you know about examples of using the GPS module?
  • 0 in reply to Miguel cosmes
    Guru 30330 points

    Glad to help.

    There is no code that I am aware of for using this GPS module with a C2000 device. It looks like there is a "Getting started Guide" for the module with MSP-EXP430F5529. I would recommend reading through and digesting the Demo. Once you understand the demo, you can begin to port it over to your F28069 device. I would love it if you could share your code on the forums after you complete the project. I am sure that other engineers on here would be interested to see the results.

    If you have questions about that demo, be sure to ask your questions on the MSP forum.

    Edit: adding the link to the getting started guide. http://processors.wiki.ti.com/index.php/CC4000_GPS_MSP-EXP430F5529_Getting_Started_Guide

  • 0 in reply to Mark Labbato
    Intellectual 310 points
    The application doesn't run on win 10(nor compatibility mode), so i have to installed on win 7 and copy the files to win10. If i get,I'll share it.
  • 0 in reply to Miguel cosmes
    Guru 30330 points

    Miguel,

    Ok. Well, if you have issues with the original demo, the MSP forum will be more suited to help. When you work on porting back to C2000, feel free to create new posts.

    Good luck!