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CC2540 Eval Kit for generic analog sensors

Mobile Wave
Prodigy 130 points

Other Parts Discussed in Thread: CC2540, CC2541

Hi,

I am tinkering with the CC2540 interacting with a multitude of sensors and was looking for a Eval/Dev kit where I can plug an analog sensor with SMBus output to a CC2540 BLE module. I do have the sensor tag and mini dev-kit, but these do not help me plug in a sensor of my choice. Correct me if I am wrong.

 

Thanks

  • 0
    TI__Expert 4565 points

    Check out the development kit here: http://www.ti.com/tool/cc2540dk 

    The smartRF boards give you a break out of all of the CC2540 EM connector pins which may help you connect with whatever sesnors you need.

    -Matt

  • 0 in reply to _mk
    Prodigy 130 points

    Got it. Thanks. I will keep the development kit in mind. I made a mistake when I said that I have a 2540 mini dev kit. I actually have a 2541 mini dev kit. Does this change your suggestion.

    Looking at the schematic, there is a test connector on the Keyfob that has the clock signals as well as a few port connectors. Can I use any of these connectors. I am OK with not using any other sensors on the board.

  • 0 in reply to Mobile Wave
    TI__Expert 4565 points

    Yeah you have the SCL and SDA lines on the TEST header along with a few GPIO.

    How are you going to interface with the SMbus sensor? I know it is possible to do so over I2C with some differences in the protocol but I've never seen it done on this device.

    -Matt

  • 0 in reply to _mk
    Prodigy 130 points

    Thanks Matthew.

    I understand your point. I have looked around and have found an SPI version of the sensor I am interested in. Will it be possible for me to use the test connectors on the KeyFob.

    Also, can you clarify if the P0_6 and P0_7 are available on the CC2541 KeyFob the way it is available on the CC2540 KeyFob. The schematic shows that the 2541 KeyFob has a P0_7 connected to the bypass pin of the power supply IC, while the 2540 KeyFob does not have a power supply IC so P0_6 and P0_7 are floating and available.

  • 0 in reply to Mobile Wave
    TI__Expert 4565 points

    You can use the test connectors on the KeyFob. You are also right about P0_7. I would leave this port alone but P0_6 should be fine since it's floating.

    Also for P0_0 and P0_1 I would be cautious since you can ground those lines with just a button press. Sounds like a short waiting to happen to me.

    If you aren't using the accel. you should be ok using P1_[2,4,7] as well

    -Matt