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LP-EM-CC1312PSIP: How can I enable the mesh network function with 915MHz band ?

Aaron Hung
Prodigy 10 points

Part Number: LP-EM-CC1312PSIP
Other Parts Discussed in Thread: CC1312PSIP, CC3200AUDBOOST

Tool/software:

Hi Support Team,

We would like to enable the mesh network function and use the RF output signal at 915MHz band for this evaluation board for our application.

Is it possible for you to help recommendate how to fulfill them? Which kind of examples in SDK we can use ? Should we replace values of Low-Pass filter (L1/C1) on EVB with new ones for 915MHz ?

BTW, is it possible for us to add audio functions with this module as well if we would like to apply one audio codec to the design ? What's the control pin/interface we can use? Please advise it.

Thanks for your kind support and help.

  • 0
    TI__Expert 7655 points

    Hi Aaron,

    out software stack for a mesh network is the Wi-SUN stack.
    You can find a training on the network setup here: https://dev.ti.com/tirex/explore/node?node=A__AQ43bVrHhe7o7BTHhal9Cw__com.ti.SIMPLELINK_ACADEMY_CC13XX_CC26XX_SDK__AfkT0vQ__LATEST 

    For more stack ore gateway feature introductions you can follow the rest of the Wi-SUN trainings additionally.

    As connection protocol for audio I would expect that you plan on using the I2S interface.

    Let us know if you have further questions.

    Kind regards,
    Theo

  • 0 in reply to Theo Lange
    Prodigy 10 points

    Hi Theo,

    Regarding to the RF output signal at 915MHz for our application, should we need to replace current values of Low-Pass filter (L1/C1) on EVB

    with new ones? Or can we adjust the frequency band via SDK tool ?

    Thanks !

    Sincerely,

    Aaron

  • 0 in reply to Aaron Hung
    TI__Mastermind 19725 points

    Hi Aaron,

    From the reference design schematics, you could remove the LPF on the board as they are optional for 915 MHz operation. However, you could just adjust the frequency band if that's easier.

    I suspect you may get a slightly higher output power/efficiency with the filter removed for 915 MHz (due to the RF matching requirements for that frequency band), but again it is optional.

    Regards,

    Zack

  • 0 in reply to ZC
    Prodigy 10 points

    Hi Zack,

    Thanks for the feedback.

    Regarding to the connection protocol for audio function, can you please advise which control pins are for I2S interface? 

    And how can we do the HW connections between codec IC and module?

    Sincerely,

    Aaron 

  • 0 in reply to Aaron Hung
    TI__Mastermind 19725 points

    Hi Aaron,

    Details of the I2S interface are found in Section 24 of the SWCU185 (CC13x2, CC26x2 SimpleLink Wireless MCU Technical Reference Manual): https://www.ti.com/lit/swcu185 (Section 24.8.1 is a good reference as well after reviewing the first few subsections).

    Section 13.3 and Section 13.8 provides additional information:

    13.3 I/O Mapping and Configuration

    The MCU IOC can map a number of peripheral modules such as GPIO, SSI, UART, I2C, and I2S to any of the available I/Os. JTAG functions are limited to specific I/O pins. Each type of peripheral signal has a unique PORTID that can be assigned to selected I/O pins (referenced as DIOs). Table 13-3 lists the different PORTID signals

    There is the i2secho example for the CC1312PSIP LaunchPad available on https://dev.ti.com/tirex/ search for "i2s" and navigate to the SimpleLink CC13xx 26xx SDK -> Examples -> Development Tools -> CC1312PSIP LaunchPad -> TI Drivers).

    To be honest, I2C HW is not something I currently have much experience with. For the i2secho example, the CC3200AUDBOOST BoosterPack (https://www.ti.com/tool/CC3200AUDBOOST) is used, so I would recommend reviewing that and/or the recommended reference design for the audio codec IC used as a starting point.

    Regards,

    Zack