User manual

UDOO Starting manual (beta) Version 0.3
http://www.udoo.org/
16"
channel, exchanging messages with a tested baudrate of 115200.
This shared serial port, which can be used for SAM3X8E programming, is accessible
exactly like on Arduino Due, via embedded USB-to-serial converter (accessible
through microUSB connector CN6, simply by removing jumper J18) or directly on
external pins #0 and #1 of Arduino pinout-compatible pin headers.
The shared serial port is connected to iMX6 pins KEYROW0 and KEYCOL0, while on
SAM3X8E is connected to pins URXD and UTXD.
For a communication example over this serial port, please check paragraph 3.3.
WARNING!
Please be aware that, due to the peculiar kind of connection of the shared serial port,
it could be possible that more than two devices are on the same serial line. It’ s up to
the customer to avoid this occurrence, since serial port connection is a push-pull
point-to-point protocol. In case a third device, connected on the same line, tried to
talk to other devices, it would be impossible to use the line. The shared serial port is
always connected on SAM3X side, it is only possible to configure the i.MX6 pin
functionality.
This can be done using Kernel source files. In default configuration, the i.MX6 pins
connected to the shared serial port are set as UART Rx and UART Tx.