# LAA on LAA

```{include} common-alert-enablement.md
```

The [LAA](https://docs.lavacloud.io/) DUT can be automated using the [Flylead MIB](/hardware/mibs/flylead.md).

## Components

The following components are required to fully automate the board:

- [Flylead MIB](/hardware/mibs/flylead.md)
- LoL DUT v2 Board
- Short RJ45 network cable
- USB-A male to USB-C male cable
- USB-A male to USB-A male cable
- 5x Cable Pairs
    - 2x 18AWG or better for power rails.

## Hardware Modifications

In order to automate recovery, the DUT hardware should be modified.

```{admonition} Hardware modification
:class: warning
The DUT will not be automatizable without this modification.
```

### Debug header

A 2x6 pin 2.54mm Female header needs to be soldered next to the NVMe SSD at J202. This is used to trigger flash recovery from the LAA-Worker without the need to solder wires directly to the push buttons.

### Standoffs

The two standoff close to J202 and J203 need to be removed and ideally be replaced with a 11mm high standoff in order to secure the LoL DUT v2 Board in place.

```{figure-md}
:width: 80%
:align: center

![HW modification ](/_images/imx8mp-verdin-laa/hw_mods.jpg)

HW modification 
```

## LAA on LAA DUT Board v2

The LoL Board v2 provides:

- Power to the LAA-DUT from the LAA-Worker using LAA-DUT's PoE Header
- Breakout LAA-DUT's Power, Reset and Flash Buttons from the Debug Header (we are only using the flash Button)
- USB switching of LAA-DUT's OTG port between Host and Gadget mode between LAA-Worker and a Raspberry Pi DUT may be installed on the LAA-DUT.

### Installation

- Taking care of the polarity install wire pairs for the following screw terminals
    - 12v
    - 3v3
    - Flash
    - USB_EN
    - USB_SIG
- Carefully install the LoL Board on to the LAA-DUT as shown below. The debug header and PoE header should be inserted into their respective headers on the LoL board. Make sure that the placement is correct.

```{figure-md}
:width: 80%
:align: center

![HW modification ](/_images/imx8mp-verdin-laa/lol-board.jpg)

LoL Board v2 
```

## MIB

We need to now connect the wires from the LoL Board to the Flylead MIB on the LAA-Worker and set the MIB_VIO Jumper to 3v3.

- 12v to 12v, take care of plarity.
- 3v3 to 3v3, take care of plarity.
- FLASH to V_Button_2, polarity does not matter
- USB_SIG to DUT_RST, take care of polarity the signal pin has a `^` marking.
- USB_EN to DUT_PWR, take care of polarity the signal pin has a `^` marking.

```{figure-md}
:width: 80%
:align: center

![HW modification ](/_images/imx8mp-verdin-laa/flylead-lol.jpg)

Flylead Connections 
```

## Ports

Connect the following ports.

- LAA-Worker USB Port 4 to LoL Board LAA_Worker USB Port.
- LAA-DUT OTG Port to LoL Board LAA-DUT USB Port.
- LAA-Worker Ethernet Port 2 to LAA-DUT Ethernet Port 1.