RE: BMD200 UART RX Problem

Eric Stutzenberger — Thu, 19 Nov 2015 19:51:14 GMT

Hi Reuben,

Full disclosure: I work for Rigado *

I sometimes have issues with the JLink Passthrough CDC UART driver. For some versions of the JLink driver, it seems to require the RTS pin to change states before it will enable the RX line. One option to solve this is to enable hardware flow control in your terminal application. Another option is to cut the traces on pins P0.09 and P0.10 and connect to a different UART device such as an FTDI board.

Hope this helps,

Eric

RE: BMD200 UART RX Problem

Einar Thorsrud — Thu, 19 Nov 2015 13:01:20 GMT

I would not expect the RX pin to be held high. If you use the UART driver, as is done in the UART Example, the RX pin is configured with pull resistors disabled (no pull). You can see this in line 80 in \components\drivers_nrf\uart\nrf_drv_uart.c.