I can't get my PCA10040 board to send serial data when connected to a FTDI USB dongle. When the FTDI dongle is disconnected, and I connect my logic analyzer to the tx and gnd pins assigned on to the UART on the PCA10040 board it works perfectly. But as soon as I connect the FTDI dongle to the same pins, I get no serial data detected on the dongle and no serial data detected on the logic analyzer.
Any ideas what could be causing this?
This is the same dongle I use all the time on my STM32 boards and it works fine, so I know it's OK.
Here is a link to a photo of the setup: www.dropbox.com/.../IMG_5031.JPG
