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--- en:u3_ioport_uart [2015/02/06 18:16]
john1117
+++ en:u3_ioport_uart [2015/02/06 18:25] (current)
john1117
@@ Line 1: / Line 1: @@
+====== UART interface using the IO-Port #1 ======
+This page introduces how you can UART Interface using the IO-Port #1\\
+{{:en:u3:u3ioport_num.png?500|}}
+**J4 - 2x4 pins(IO Port #1)**
+^ Pin Number ^ Expansion Net Name ^ Export Number ^ Pin Number ^ Expansion Net Name ^ Export Number ^
+|1|XEINT_8 (GPX1.0)| #199 |2|1.8V Power| |
+|3|XEINT_9 (GPX1.1)| #200 |4|XURXD_0 (UART_0_RXD)| /dev/ttySAC0 |
+|5|XEINT_13 (GPX1.5)| #204 |6|XUTXD_0 (UART_0_TXD)| /dev/ttySAC0 |
+|7|Ground| |8|5V0 Power| |
+=== How to test your UART0 of IO-Port #1 ===
+You need to prepare below items.\\
+  * **ODROID-U3**
+  * USB-UART Module Kit
+  * jumper wire x4
+  * serial comunication utility on your Host PC
+. You will connect jumper wire to IO-Port #1.\\
+This picture is that jumper is connected.\\
+{{:en:u3:u3ioport_wire_connected.jpg?500|}}
+**IO-PORT UART Block Diagram**
+{{:en:u3:u3ioport_wire.png?500|}}
+. HOST PC setup.\\
+You will open USB Module Devices on your HOST PC.\\
+**Ubuntu**\\
+Install Serial comunication utility.
+  sudo apt-get install minicom
+After check your usb serial node, Open serial port.
+  ls /dev/ttyUSB*
+  sudo minicom -b 115200 -D /dev/ttyUSB0
+. Target board(**ODROID-U3**) setup.\\
+Set a serial node on your **ODROID-U3**
+  stty -F /dev/ttySAC0 115200
+. **ODROID-U3** -> HOST PC test.\\
+**ODROID-U3**
+  echo 1 > /dev/ttySAC0
+. HOST PC -> **ODROID-U3** test.\\
+**ODROID-U3**\\
+  cat /dev/ttySAC0
+HOST PC\\
+Send characters via minicom.