40-Pin I/O Headers Utility on I-Pi SMARC RB5This document provides detailed instructions for utilizing the GPIO pins on the I-Pi SMARC RB5 module based on Linux. Prerequisites Power up the target device with HDMI ,Serial terminal or ADB shell. Utilizing the GPIO Pins with Linux Open Terminal. For non-root user, enter su command for root privilege. To export the GPIO pin. cd /sys/class/gpioecho N > export (N should replace with gpio base number)cd gpioN Note: The GPIO base number may differ for different modules. To read GPIO Pin Attributes cat directioncat edgecat value GPI To set GPIO direction as input echo in > direction To read the value of a pin cat value GPO To write the direction of a pin to output echo out > direction To write the value of a pin to high echo 1 > value To write the value of a pin to low echo 0 > value GPIO Pin Configurations On CN1001 expansion connector E_GPIO and S_GPIO is available. These GPIO pins are mapped by to following numbers S_GPIO: S_GPIO_Name CN1001_Pin_Number Sysfs_IndexS_GPIO06 pin07 398 S_GPIO07 pin12 451 S_GPIO08 pin11 485 S_GPIO09 pin13 486 S_GPIO010 pin15 488 S_GPIO011 pin16 490 S_GPIO012 pin18 492 S_GPIO013 pin22 494 E_GPIO E_GPIO_Name CN1001_Pin_Number Sysfs_IndexE_GPIO1_0 pin29 275 E_GPIO1_1 pin31 276 E_GPIO1_2 pin32 277 E_GPIO1_3 pin33 278 E_GPIO1_4 pin35 279 E_GPIO1_5 pin36 280 E_GPIO1_6 pin37 281 E_GPIO1_7 pin38 282 E_GPIO1_8 pin40 283