NanoPi Neo x2
NanoPi Neo Core or Air supporting 2 block slots
Features
- 2x full featured Block slots
- NanoPi Neo Core or Air module
- PoE powering
- USB-C powering
- up to 24V power supply
- Debug console on USB-C
- 2x USB-A hosts
Reading blocks configuration
To access blocks configuration JSON you have to read it from its EEPROM. First module uses address 0x54, second 0x55 aso. Load drivers first:
echo 24c32 0x54 > /sys/bus/i2c/devices/i2c-0/new_device
echo 24c32 0x55 > /sys/bus/i2c/devices/i2c-0/new_device
Dump the EEPROMs content:
cat /sys/bus/i2c/devices/i2c-0/0-0054/eeprom
or process it with jq:
jq . /sys/bus/i2c/devices/i2c-0/0-0054/eeprom
{
"class": "KNX",
"ic": "NCN5130",
"if": "serial",
"uart": "38400@8E1",
"serial": "12345678"
}
Bootloading and resetting blocks
Blocks might support bootloading and reset function depending on their design.
On a NanoPiNeo this funtionallity is accessed by GPIOs. For Slot 1:
| Function Slot 1 | GPIO | Block Pin |
|---|---|---|
| serial port | ttyS1 | 33/34 |
| Reset | 201 | 38 |
| Bootload | 200 | 37 |
echo 200 > /sys/class/gpio/export
echo 201 > /sys/class/gpio/export
echo out > /sys/class/gpio/gpio200/direction
echo 1 > /sys/class/gpio/gpio200/value
echo out > /sys/class/gpio/gpio201/direction
echo 0 > /sys/class/gpio/gpio201/value
echo 1 > /sys/class/gpio/gpio201/value
for Slot 2:
| Function Slot 2 | GPIO | Block Pin |
|---|---|---|
| serial port | ttyS2 | 33/34 |
| Reset | 3 | 38 |
| Bootload | 2 | 37 |
echo 2 > /sys/class/gpio/export
echo 3 > /sys/class/gpio/export
echo out > /sys/class/gpio/gpio2/direction
echo 1 > /sys/class/gpio/gpio2/value
echo out > /sys/class/gpio/gpio3/direction
echo 0 > /sys/class/gpio/gpio3/value
echo 1 > /sys/class/gpio/gpio3/value