AOM-DB3500 GPIO CN3
From ESS-WIKI
Contents
GPIO Header and Selection
AOM-DB3500 GPIO Connector
| CN3_GPIO Connector Pin Definition | |||
| Pin | Signal | I/O | Description |
| 1 | +V1.8 | 1.8V source | |
| 2 | GND | Ground | |
| 3 | GPIO0_Z_G | I/O | GPIO0 Signal |
| 4 | GPIO4_G | I/O | GPIO4 Signal |
| 5 | GPIO1_Z_G | I/O | GPIO1 Signal |
| 6 | GPIO5_G | I/O | GPIO5 Signal |
| 7 | GPIO7_G | I/O | GPIO7 Signal |
| 8 | GPIO6_G | I/O | GPIO6 Signal |
| 9 | N/A | Note Applicable | |
| 10 | GPIO3_PH | I/O | GPIO3 Signal |
AOM-DB3500 GPIO Jumper Setting
| J28 GPIO0 Headers | |
| Pin | Function |
| J28（1-2） | ADC（AOM-3821 not support） |
| J28（2-3） | GPIO0 to J26（Default） |
| J26 GPIO0 Selection | |
| Pin | Function |
| J26（1-2） | GPIO0 to CN3 |
| j26（2-3） | GPIO0 to TYPEC_Z_SBU1 (Default) |
| J25 GPIO1 Selection | |
| Pin | Function |
| J25（1-2） | ADC (AOM-3821 not support) |
| J25（2-3） | GPIO1 to J27 (Default) |
| J27 GPIO1 Selection | |
| Pin | Function |
| J27（1-2） | GPIO1 to CN3 |
| J27（-23） | GPIO1 to TYPEC_Z_SBU2 (Default) |
| J31 GPIO4 Selection | |
| Pin | Function |
| J31（2-3） | GPIO4 to J37 (Default) |
| J37 GPIO4 Selection | |
| Pin | Function |
| J37（1-2） | GPIO4 to CN3 (Default) |
GPIO
The RK3588 bank/bit notation for GPIOs must be formed as "GPIO<GPIO_bank>_<gpio_bit>"
The numeric value of GPIO is calculated as follows:
32 x (gpio_bank) + gpio_bit
gpio_bit: A0~A7 0-7 B0~B7 8-15 C0~C7 16-23 D0~D7 24-31
E.g. GPIO3_A0 becomes 96
| GPIO Number | GPIO formed | Numeric Representation |
| GPIO4 | GPIO1_C6 | 54 |
Export GPIO then you can use control GPIO from user space through sysfs.
Export GPIO0
# echo 54 > /sys/class/gpio/export
Set GPIO direction to in/out
# echo "out" > /sys/class/gpio/gpio54/direction
Set GPIO value 0/1 if GPIO pin define is output
# echo 1 > /sys/class/gpio/gpio54/value
Unexport GPIO0
# echo 54 > /sys/class/gpio/unexport