Using Ethernet

Connect one end of an Ethernet cable to the VisionFive RJ45 connector, and connect the other end of the cable to a router.
Install a TFTP server on the host PC by executing:
```
sudo apt-get update
sudo apt install tftpd-hpa
```
Check the server status:
```
sudo systemctl status tftpd-hpa
```
Execute the following to enter the TFTP server:
```
sudo nano /etc/default/tftpd-hpa
```
Configure the TFTP server as follows:
```
TFTP_USERNAME="tftp"
TFTP_DIRECTORY="/home/user/Desktop/tftp_share"
TFTP_ADDRESS=":69"
TFTP_OPTIONS="--secure"
```
Note: TFTP_DIRECTORY refers to the directory to store bootloader, ddr init, and u-boot files.
Restart the TFTP server by executing:
```
sudo systemctl restart tftpd-hpa
```
Power on the VisionFive and wait until it enters the u-boot mode.
Configure the environment variables by executing:
```
setenv ipaddr 192.168.120.200;setenv serverip 192.168.120.12
```
Note: Generally, the default IP of a router is 192.168.120.1. In this case, use the server IP as the IP assigned by the DHCP server of the router and use the VisionFive IP as 192.168.120.xxx. However, if your router IP is different (for example, 192.168.2.1 ), make sure the server IP and VisionFive IP are in the same IP domain (for example, 192.168.2.xxx).
Check the connectivity by pinging the host PC from VisionFive:
Example Command:
```
ping 192.168.120.12
```
Result:
The following output indicates that the host PC and VisionFive have established communication on the same network.
Figure 1. Example Output
Connect to SPI Flash:
```
sf probe
```
Example Output:
Figure 2. Example Output
Tip:
- In the commands of the following Step 11 to 14:
  
  0x90000000 refers to the ddr address
  
  192.168.120.12 refers to the TFTP server IP
  
  0x0 refers to the SPI flash offset for bootloader.
  
  0x10000 refers to the SPI flash offset for ddrinit.
  
  0x40000 refers to the SPI flash offset for u-boot.
- If VisionFive fails to boot up after restart, refer to the Appendix C: Recovering the Bootloader chapter to recover.

Update bootloader:

tftpboot 0x90000000 192.168.120.12:bootloader-JH7100-211102.bin.out
sf update 0x90000000 0x0 ${filesize}

Example Output:

Update ddr init:

tftpboot 0x90000000 192.168.120.12:ddrinit-2133-211102.bin.out
sf update 0x90000000 0x10000 ${filesize}

Example Output:

Update u-boot:

tftpboot 0x90000000 192.168.120.12:fw_payload_visionfive.bin.out
sf update 0x90000000 0x40000 ${filesize}

Restart VisionFive to make the updates take effect.

Note: The methods to compile and update u-boot are included in the VisionFive Single Board Computer Software Technical Reference Manual.