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--- en:c1_enhancement_gpio40 [2016/03/08 16:37]
charles.park
+++ en:c1_enhancement_gpio40 [2016/03/29 10:38] (current)
charles.park [Enhancement of 40pin GPIO]
@@ Line 1: / Line 1: @@
 ====== Enhancement of 40pin GPIO ======
-The **ODROID-C2** provides 40Pin GPIOs.
+The **ODROID-C1/ODROID-C1+** provides 40Pin GPIOs.
-**Easy to use GPIOs**\\
+**Easy to use GPIOs** \\
-First, you refer to below link.\\
+First, you refer to below link. \\
-You check Export number that you want to use GPIO.\\
+You check Export number that you want to use GPIO. \\
-[[en:c2_hardware&#expansion_connectors | Pin description]]
+[[en:c1_hardware&#expansion_connectors | Pin description]]
-** You need to enter into super-user mode first to run below commands !! **\\
+** You need to enter into super-user mode first to run below commands !! **
 <code> sudo su </code>
-\\ \\ \\
 Create a GPIO file access.\\
-You can access GPIOs using sysfs interface.
+You can access GPIOs using sysfs interface. This example uses pin number 18 which is connected to the GPIO102(GPIOX.BIT5).
-  echo 233 > /sys/class/gpio/export
+  echo 102 > /sys/class/gpio/export
-Configure the pin direction (in/out)
+Configure the pin direction for input
-  echo in > /sys/class/gpio/gpio29/direction : gpio direction input
+  echo in > /sys/class/gpio/gpio102/direction
-  echo out > /sys/class/gpio/gpio29/direction : gpio direction output
+Configure the pin direction for output
+  echo out > /sys/class/gpio/gpio102/direction
 Read a value (if gpio direction is input)
-  cat /sys/class/gpio/gpio233/value
+  cat /sys/class/gpio/gpio102/value
 Write a value (if gpio direction is output)
-  echo 1 > /sys/class/gpio/gpio233/value : gpio high
+  echo 1 > /sys/class/gpio/gpio102/value : gpio high
-  echo 0 > /sys/class/gpio/gpio233/value : gpio low
+  echo 0 > /sys/class/gpio/gpio102/value : gpio low
 ===== I2C =====