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CC2340R5: How to let HCI command go through I2C

Jerry Kuo
Expert 4320 points
Part Number: CC2340R5

Tool/software:

Hi team,

My customer is evaluating CC2340R5. They will use one external processor/MCU to control (like setting AT commands) CC2340R5 (eg. initiating BLE advertising, establishing connections, and transmitting data.) Due to the external processor/MCU has limited UART interface, they ask if it's possible to use set commands through I2C.

I suggest customer to evaluate host_test FW on CC2340R5 with BTool. However, the HCI command can only support UART or SPI. Could team provide any suggestion how to let HCI command go through I2C ?

  • 0
    TI__Expert 5000 points

    Hi,

    HCI commands may be sent through the NPI (Network Processor Interface) protocol through either UART or SPI, I2C is not supported. The customer could either modify the code of host_test in some way to allow for I2C, or add a I2C to UART converter, but I don't see any other way to use I2C for HCI commands.

    Kind regards,
    Maxence