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RS485 to UART on FRDM K64

Question asked by roymessinger on Jan 30, 2017
Latest reply on Jan 31, 2017 by Mark Butcher

I want to implement RS485 to UART on my board. My board is based on the FRDM K64 as a reference board, so currently I'm trying to figure it out on the FRDM K64.

I've connected an RS485 to UART board to the BT connector (which equal to UART4) and from the host computer a USB to RS485 cable in this configuration:

Host computer USB -> this cable -> RS485 to uart board -> Bluetooth connector on FRDM K64 -> UART4 on MK64 chip.

Well, unfortunately, it does not work. The computer detects the USB to RS485 cable as expected, and gives it a comm port (I see it in the device manager). I connect the USB cable to the J26 connector on board the FRDM K64 to burn the flash (as always) and try to read on UART4 what I write in UART0.

Any ideas why and how to make it work?

My whole project relies on this communication.

Thanks.

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