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cc2540 and the Full-Speed USB Interface

Igor Vanelster
Prodigy 20 points
Other Parts Discussed in Thread: CC2540

Hi all
is it possible to use the cc2540 master usb dongle with the Full-Speed USB Interface  ?  

The Com Port is too slow to communicate with maximum data rate. Isn't it ?
The USB Sniffer Firmware is not working with the COMPort too. How can i communicate with the Master USB Dongle directly over USB ??


Thanks for you help !

  • 0
    TI__Expert 6840 points

    Hello,

    What is the data rate you are seeing limitation with?  The max data rate is 1Mbs during Tx, but the actual data rate is limited to data sent at connection intervals.. The shortest interval is 7.5ms and the max user data is 80bytes.  For a lot of data - like audio steaming, classic BT may be a better choice. Note, the 2540 only supports Bluetooth Low Energy and is not a dual mode device.

    The USBDongle sniffer is being used by several customers successfully.  It sounds like there may be something wrong with setup. Is the PC not detecting the dongle?

     

    Br,

    -Greg 

  • 0 in reply to GregS
    Prodigy 20 points

    Hello Greg,

     

    What i want to say was that the sniffer is working very good (sorry for my mistake). Better then the BLE Master Dongle. So I want to have the same data rate on my BLE Master Dongle.

    I am referring to:

    http://processors.wiki.ti.com/index.php/Category:KeyFobDemo

    citation:

    "It will appear that the messages are “lagging” from the time that the keyfob is moved until the time that the messages are displayed in the message window. It is important to understand that this delay is not due to over-the-air latency of the messages, but is actually a buffering delay due to the slow UART baud rate of 57600."

    I have the same problem with my own application.

    So why does the BLE Dongle don't use USB Full speed ??

     

     

    Thanks for your help