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--- en:u3_enhancement_ioport [2015/02/03 11:57]
john1117 [Enhancement of IO-Port#1 and IO-Port #2]
+++ en:u3_enhancement_ioport [2015/02/03 11:57] (current)
john1117 [Enhancement of IO-Port#1 and IO-Port #2]
@@ Line 1: / Line 1: @@
+====== Enhancement of IO-Port#1 and IO-Port #2 ======
+The **ODROID-U3** provides two expansion sockets.\\
+{{:en:u3:u3ioport.png?500|}}
+**Easy to use GPIOs**\\
+First, you refer to below link.\\
+You check Export number that you want to use GPIO.\\
+[[u3_hardware&#expansion_connectors | Pins description.]]
+Create a GPIO file access.\\
+You can access GPIOs using sysfs interface.
+  echo 199 > /sys/class/gpio/export
+Configure the pin direction (in/out)
+  echo out > /sys/class/gpio/gpio199/direction
+Write a value (1/0)
+  echo 1 > /sys/class/gpio/gpio199/value
+===== GPIO-I2C =====
+  * [[u3_ioport_i2c | I2C interface using the GPIO pins]]
+===== SPI =====
+  * [[u3_ioport_spi | SPI interface using the IO-Port #2]]
+===== UART =====
+  * [[u3_ioport_uart | UART interface using the IO-Port #1]]