手機 - Motorola XT894 - 焊接UART

參考資訊：
http://muru.com/linux/d4/

Debug UART

There is a debug uart at tty[SO]2 multiplexed with the USB connector. To use
it, you need a custom cable with D+ and D- connected to a 3.3V UART. You need
to leave VBUS disconnected to avoid the connector getting multiplexed back to
USB. It's easiest to make the custom UART by ordering a micro-USB-B breakout
board and connecting the USB serial cable wires to it. I used the sparkfun
break out board here, others should work fine too.

The wire connections are:
d-	device uart tx	usb serial rx ftdi yellow, pl2303 white
d+	device uart rx	usb serial tx ftdi orange, pl2303 green
gnd	device ground	usb serial gnd
vbus	do not connect

跳線


完成