Laboratory stand dedicated to Odroid-H4 platforms assembly guide

Introduction

This document describes platform-specific details for assembling Odroid H4 testing stands. Use this document as reference while going through Generic Testing Stand Setup

Prerequisites

The below table contains platform-specific information about all elements which are needed to create testing stands for Odroid H4.

RTE v1.1.0
RTE power supply 5V 2A Micro-USB
10x standard female-female connection wire 2.54 mm raster
Pomona 8-pin SOIC clip
2x RJ45 cable: 1 for RTE and 1 for the platform

External flashing enabling

Connect the RTE SPI header to the platform using the 2.54 mm female-female wires and Pomona as shown in Generic testing stand setup to the flash chip on the bottom of your platform:

Serial connection

The method of setting and using serial connection is described in the Serial connection guide. In this case, you will need to enable UART port and connect it to the pins 6, 8 and 10 of Odroid's Peripheral Expansion Header using 2.54 mm female-female wires.

RTE J18	Odroid H4 EXPANSION HEADER
J18 pin 1 (TX)	pin 8 APU_UART_RXD_BUF
J18 pin 2 (RX)	pin 10 APU_UART_TXD_BUF
J18 pin 3 (GND)	pin 6 GND

Theory of operation

The following sections describe how to use all of the enabled features:

serial connection to the platform,
controlling power supply,
enabling basic power actions with the platform (power off/power on),
external flashing with the RTE.

Power supply controlling

Power supply controlling is performed with the relay module on RTE connected to one of RTE GPIOs. Power operation should be performed using the rte_ctrl script implemented in meta-rte (OS image dedicated to the RTE platform).

To toggle the power supply use the below command:

rte_ctrl rel

Basic power operations

Basic power operations should be performed based on the rte_ctrl script implemented in meta-rte (OS image dedicated to the RTE platform). To perform basic power operations use the below-described commands:

Turn on the platform:
```
rte_ctrl pon
```
Turn off the platform:
```
rte_ctrl poff
```

Note, that in order for the above commands to work properly, the platform should be powered up: both RTE Relay and the power supply must be connected and turned on.

External flashing

The external flashing procedure should be performed based on the scripts implemented on the RTE platform. To perform the flashing operation reproduce, the below-described steps:

Important

It is recommended to detect the chip with the DC jack power cable disconnected from the Odroid. If the chip is successfully detected, you can reconnect the DC power jack and proceed with your task. If the chip fails to detect after reconnecting the power, you may need to attach an additional grounding cable to the RTE. This additional grounding is not always necessary, but it can resolve detection issues if they arise.

First run the flashrom command on RTE to check if the flash is detected by following the first three steps from this guide , this chip requires 3.3V.

Next check if the pomona is connected properly.

flashrom -p linux_spi:dev=/dev/spidev1.0,spispeed=16000

By using scp put the requested Dasharo file to the RTE:
```
scp <path_to_firmware>/<firmware_file> root@<RTE_IP>:/tmp/coreboot.rom
```
Where:
- path_to_firmware - path to firmware, which should send to RTE,
- firmware_file - the name of the firmware file, which should be sent to RTE,
- RTE_IP - IP address of the connected RTE.
Login to RTE via ssh or minicom.
Write the flash chip by executing the following command on RTE:
```
flashrom -p linux_spi:dev=/dev/spidev1.0,spispeed=16000 -w /tmp/coreboot.rom
```
Do not interrupt the flashing procedure in any way (especially by changing connections). It may cause hardware damage!
If the writing was successful, the output from the command above should contain the phrase Verifying flash... VERIFIED.

USB devices

Since some issues with USB controllers may only happen on selected USB ports, it's important to plug in USB devices to all 4 USB ports of the board.