AFE-E420 GPIO

GPIO Pin Number Definition

Pin Name	GPIO_Number
GPIO_A_0	480
GPIO_A_1	481
GPIO_A_2	482
GPIO_A_3	483
GPIO_A_4	484
GPIO_A_5	485
GPIO_A_6	486
GPIO_A_7	487
GPIO_B_0	488
GPIO_B_1	489
GPIO_B_2	490
GPIO_B_3	491
GPIO_B_4	492
GPIO_B_5	493
GPIO_B_6	494
GPIO_B_7	495

Enable GPIO

# echo ${GPIO_Number} > /sys/class/gpio/export

GPIO Direction

Get GPIO direction.

# cat /sys/class/gpio/gpio${GPIO_Number}/direction

Set GPIO to input.

# echo in > /sys/class/gpio/gpio${GPIO_Number}/direction

Set GPIO to output.

# echo out > /sys/class/gpio/gpio${GPIO_Number}/direction

GPIO Level

Get GPIO level.

# cat /sys/class/gpio/gpio${GPIO_Number}/value

Set output to high.

# echo 1 > /sys/class/gpio/gpio${GPIO_Number}/value

Set output to low.

# echo 0 > /sys/class/gpio/gpio${GPIO_Number}/value