GPIO setting

Jemii-150 is equipped with 3 isolated digital inputs (DI) and 3 isolated digital outputs (DO).

Jetpack 6.x

Software Mapping of DI & DO

Please use the following script to read the 3 DI values.

### Read DI

sudo apt install gpiod
sudo apt install python3-pip
sudo pip install Jetson.GPIO

# DI0 _ GPIO12 _ GPIO3_PN.01
# DI1 _ GPIO07 _ GPIO3_PG.06
# DI2 _ GPIO09 _ GPIO3_PAC.06

# DI0
PIN=PN.01
sudo gpioget $(sudo gpiofind $PIN)

# DI1
PIN=PG.06
sudo gpioget $(sudo gpiofind $PIN)

# DI2
PIN=PAC.06
sudo gpioget $(sudo gpiofind $PIN)

Please use the following script to set the 3 DO values.

## Check NAME and GPIO Mapping
sudo gpioinfo

# DO0 _ GPIO11 _ GPIO3_PQ.06 _ 0x02430070
# DO1 _ GPIO01 _ GPIO3_PQ.05 _ 0x02430068
# DO2 _ GPIO13 _ GPIO3_PH.00 _ 0x02434040

### Set GPIO to GPO

sudo apt update && sudo apt install busybox

# Set DO0 to GPO 
sudo busybox devmem 0x02430070 w 0x004

# Set DO0 to 1
PIN=PQ.06
VAL=1
sudo pkill -f -- "$(sudo gpiofind $PIN)"
sudo gpioset --mode=signal $(sudo gpiofind $PIN)=$VAL &

# Set DO0 to 0
PIN=PQ.06
VAL=0
sudo pkill -f -- "$(sudo gpiofind $PIN)"
sudo gpioset --mode=signal $(sudo gpiofind $PIN)=$VAL &


# Set DO1 to GPO 
sudo busybox devmem 0x02430068 w 0x004

# Set DO1 to 1
PIN=PQ.05
VAL=1
sudo pkill -f -- "$(sudo gpiofind $PIN)"
sudo gpioset --mode=signal $(sudo gpiofind $PIN)=$VAL &

# Set DO1 to 0
PIN=PQ.05
VAL=0
sudo pkill -f -- "$(sudo gpiofind $PIN)"
sudo gpioset --mode=signal $(sudo gpiofind $PIN)=$VAL &


# Set DO2 to GPO 
sudo busybox devmem 0x02434040 w 0x004

# Set DO2 to 1
PIN=PH.00
VAL=1
sudo pkill -f -- "$(sudo gpiofind $PIN)"
sudo gpioset --mode=signal $(sudo gpiofind $PIN)=$VAL &

# Set DO2 to 0
PIN=PH.00
VAL=0
sudo pkill -f -- "$(sudo gpiofind $PIN)"
sudo gpioset --mode=signal $(sudo gpiofind $PIN)=$VAL &

Jetpack 5.x

Software Mapping of DI & DO

Please use the following script to read the 3 DI values.

### Check NAME and GPIO Mapping by
# sudo cat /sys/kernel/debug/gpio

### Read DI

sudo apt install gpiod
sudo apt install python3-pip
sudo pip install Jetson.GPIO

# DI0 _ GPIO01 _ GPIO3_PQ.05
# DI1 _ GPIO07 _ GPIO3_PG.06
# DI2 _ GPIO09 _ GPIO3_PAC.06

sudo -s

DI0_NAME=PN.01
DI0_GPIO=433

DI1_NAME=PG.06
DI1_GPIO=389

DI2_NAME=PAC.06
DI2_GPIO=492

### initDI
echo $DI0_GPIO > /sys/class/gpio/export
echo in > /sys/class/gpio/$DI0_NAME/direction

echo $DI1_GPIO > /sys/class/gpio/export
echo in > /sys/class/gpio/$DI1_NAME/direction

echo $DI2_GPIO > /sys/class/gpio/export
echo in > /sys/class/gpio/$DI2_NAME/direction

### Read DI Value

sudo cat /sys/kernel/debug/gpio | grep $DI0_NAME
sudo cat /sys/kernel/debug/gpio | grep $DI1_NAME
sudo cat /sys/kernel/debug/gpio | grep $DI2_NAME

Please use the following script to set the 3 DO values.

### Set DO

# DO0 _ GPIO11 _ GPIO3_PQ.06 _ 0x02430070
# DO1 _ GPIO12 _ GPIO3_PN.01 _ 0x02440020
# DO2 _ GPIO13 _ GPIO3_PH.00 _ 0x02434040

### Set GPIO to GPO

sudo -s

DO0_NAME=PQ.06
DO0_GPIO=454

DO1_NAME=PQ.05
DO1_GPIO=453

DO2_NAME=PH.00
DO2_GPIO=391

### initDO
echo $DO0_GPIO > /sys/class/gpio/export
echo out > /sys/class/gpio/$DO0_NAME/direction

echo $DO1_GPIO > /sys/class/gpio/export
echo out > /sys/class/gpio/$DO1_NAME/direction

echo $DO2_GPIO > /sys/class/gpio/export
echo out > /sys/class/gpio/$DO2_NAME/direction

### Make DO HIGH 
echo 1 > /sys/class/gpio/$DO0_NAME/value
echo 1 > /sys/class/gpio/$DO1_NAME/value
echo 1 > /sys/class/gpio/$DO2_NAME/value

### Make DO LOW
echo 0 > /sys/class/gpio/$DO0_NAME/value
echo 0 > /sys/class/gpio/$DO1_NAME/value
echo 0 > /sys/class/gpio/$DO2_NAME/value

# Check DO Values
sudo cat /sys/kernel/debug/gpio | grep $DO0_NAME
sudo cat /sys/kernel/debug/gpio | grep $DO1_NAME
sudo cat /sys/kernel/debug/gpio | grep $DO2_NAME