Setting up NeuralPlex

This section covers the details of some components that help you in get started with the NeuralPlex.

Main Connector

The NeuralPlex main connector a Molex 5007620481, for power, ground, CAN, I/O, etc. The mating connector is Molex 643203311. The pinout is shown in the table below:

Pin	Function	Pin	Function	Pin	Function	Pin	Function
A1	PWM_3	B1	PWM_4	C1	LINE_OUT3_L	D1	LINE_OUT2_L
A2	PWM_2	B2	LINE_OUT3_R	C2	LINE_OUT3_GND	D2	LINE_OUT2_GND
A3	PWM_1	B3	ANA_IN_2	C3	ANA_IN_3	D3	KL15
A4	CAN0_L	B4	CAN0_H	C4	CAN1_L	D4	CAN1_H

Pin	Function	Pin	Function	Pin	Function	Pin	Function
E1	GND	F1	GND	G1	MIC_IN_3	H1	MIC_IN_4
E2	LINE_OUT2_R	F2	LINE_OUT1_R	G2	LINE_OUT1_L	H2	LINE_OUT1_GND
E3	ANA_IN_1	F3	ANA_IN_4	G3	N/C	H3	N/C
E4	CAN3_L	F4	CAN3_H	G4	CAN2_L	H4	CAN2_H

Pin	Function	Pin	Function	Pin	Function	Pin	Function
J1	N/C	K1	VREF_OUT	L1	KL30	M1	KL30
J2	MIC_IN_1	K2	MIC_IN_2	L2	GND	M2	SPK_R_OUT+
J3	RS232_RXD	K3	LIN	L3	GND	M3	SPK_R_OUT-
J4	RS232_TXD	K4	SPK_L_OUT+	L4	SPK_L_OUT-	M4	POWER_AMP

At a minimum, to run the reference application, you will need to connect KL30, KL15, GND, CAN0_L, and CAN0_H.

Power Supply

To power up the NeuralPlex, you must ensure your mating connector has the proper connections. Make the connection in the following manner:

• Connect pins L1, M1, D3 to +9-32V VCC
• Connect pins E1, F1, L2, L3 to GND

Connection to NeuralPlex

The NeuralPlex can be accessed through ssh from multiple interfaces.

• Ethernet-over-USB (preferred)
• Ethernet (Available only if ordered)
• WiFi (Available only if ordered)

Ethernet-over-USB (preferred)

To connect via USB, simply connect to the USB 2.0 connector on the back of the NeuralPlex (gray connector) and plug into your development machine. By default, the NeuralPlex USB interface is configured with the g_ether module and is set with a static IP address of 192.168.5.100. Your development machine should have a usb0 interface and you will need to manually configure your development machine to have a static IP address of 192.168.5.101, netmask of 255.255.255.0, and gateway set to 192.168.5.100. Once configured, you can now access the device through SSH as follows:

Connect to NeuralPlex

root@neuralplex:~# ssh root@192.168.5.100

Ethernet Connection

To connect via Ethernet, simply connect to the 1000BASE-TX connector on the front of the NeuralPlex and plug into your development machine. By default, the NeuralPlex ethernet interface is configured as a DHCP server, so it will automatically assign the IP address to the connected device. You can now access the device through SSH as follows:

Connect to NeuralPlex

root@neuralplex:~# ssh root@192.168.4.100

Wi-Fi Connection

By default, the NeuralPlex operates like an Access Point. To connect via Wi-Fi, follow the steps below:

1. Search for a network with SSID: NeuralPlex-xxx. The last section of the name will be unique string for each device.
2. Connect to the network using password: 12345678.
3. You can now access the device through SSH as follows:

Connect to NeuralPlex

root@neuralplex:~# ssh root@192.168.3.100

SSH/SCP Connection

The connection to Display via SSH/SCP is required to access the terminal or perform actions like sharing files. The details of that are shown in the table below:

Field	Value
IP Address (USB Connection)	192.168.5.100
IP Address (Ethernet Connection)	192.168.4.100
IP Address (Wi-Fi Connection)	192.168.3.100
Port	22
Username	root
Password	mrsroot

File System

The root file system operates in read-only mode as it is safer and faster. However, for actions like copying the user application or enabling a systemd service, the read/write mode is required. To switch to that mode, follow these steps:

1. Type the following terminal command:

   Mount drive as read/write

   root@neuralplex:~# mount -o remount,rw /

2. After writing, issue the sync command to complete the process of writing to the main file and switch back to the read-only mode.

   Mount drive as read-only

   root@neuralplex:~# sync
   root@neuralplex:~# mount -o remount,ro /

Read/Write Partition

The root file system operates in read-only mode. However, there is a dedicated partition for user data and operates in read/write mode. This partition also contains some important configuration files that you can change.

To navigate to this location, enter the following commands:

Read/Write partition

root@neuralplex:~# cd /rw_data

Tip

After writing files to the read/write partition, ensure to issue the sync command to complete the process of writing to the partition.