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LAUNCHXL-CC3235S: Transfer data to cc3235s board with another ethernet module

Part Number: LAUNCHXL-CC3235S
Other Parts Discussed in Thread: CC3235S, CC3135

Hi Experts,

Our customer has cc3235s launchpad and he want to interface ethernet module with this board to connect it with other microcontrollers is that possible?
so he have a project where he will have a senor node with some microcontroller connected with ethernet module and then he need to transfer that data to cc3235s board with another ethernet module.
its just that he need to know how to interface the ethernet module with the board for data transmission with other microcontrollers.
Please advise. Thank you so much in advance.

Kind regards,
Gerald

  • Hi Gerald,

    CC32xx chips does not have integrated Ethernet PHY or MAC with MII/RMII interface. From this reason direct connection of Ethernet to CC3235 device is not possible. I think there are two ways how to deal with this:

    • connect another MCU with Ethernet via (UART, SPI) with CC3235. This MCU will act like a Ethernet interface. For example you can select MSP432E4x or TM4C129.
    • use Ethernet MAC+PHY with SPI/parallel interface like a ENC424J600 from Microchip or Ethernet controller with PHY+MAC+IP stack like a WIZnet chips. TI does not have such chip at portfolio.

    btw ... maybe there can be a alternate way. MSP432E4 + CC3135.

    Jan

  • i will add to Jan that the solution would come with 2 different network stacks (one on top of the wi-fi and one on top of the ethernet) so routing/bridging would need to be done through the app. An alternative would be to use the CC3235 in bypass mode, i.e. using the cc3235 in a transceiver mode while bypassing the internal tcpip stack.