Has anyone had any success powering the OpenSDA circuit on the FRDM-KL25Z without a USB connection, or perhaps advise me to the best way this can be achieved? I have an Ciseco URF wireless serial interface that I want to use to communicate data from the OpenSDA mini usb connector wirelessly to a laptop, for data logging. I would also like to keep the wired functionality so I can continue to program the board from USB. Thanks in advance
Hi, Gordon
For your question1: I think the best way is connect power to pin1 of U1 on freedom board.
For your question2: I think it is impossible. Because mini usb uses usb communication interface but URF uses UART communication interface. So you cannot connect your URF to mini-usb directly,
Hope my reply can help you. Thanks.
Best Regards
Paul
Hi Paul,
Thanks for your reply.
I have look at the schematics for the FRDM KL25Z and Pin 1 of U1 seems to be the ground connection for the voltage regulator. Are you looking at the same schematic? Also, the URF Module I was talking about does support USB communication, and I am able to connect it using a USB A to USB mini-B adapter.
Thanks,
Gordon
Hi, Gordon
For question1: It should be pin3 not pin1.
For question2: OK. If your URF module can support USB function. I think it is possible. You only need to change the interface connection.
Hope my reply can help you.
Best Regards
Paul