harmony 鸿蒙Fixing Image Burning Errors

2022-12-05
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Fixing Image Burning Errors

“Error: Opening COMxx: Access denied” is displayed when I start image burning

Symptom

“Error: Opening COMxx: Access denied” is displayed after a serial port is selected to start image burning.

**Figure 1** Failed to open the serial port

hi3516-faq-serial-access-denied

Possible Causes

The serial port is in use.

Solution
Search for the terminal using serial-xx from the drop-down list in the TERMINAL panel.

Figure 2 Checking whether the serial port is in use

hi3516-faq-serial-check

Click the dustbin icon as shown below to disable the terminal using the serial port.

Figure 3 Disabling the terminal using the serial port

hi3516-faq-serial-close-terminal

Click Burn, select the serial port, and start burning images again.

Figure 4 Restarting the burning task

hi3516-faq-serial-reburn

The development board failed to connect to the PC

Symptom

The file image cannot be obtained after a serial port is selected to start image burning.

**Figure 5** Failed to obtain the file image due to network disconnection

hi3516-faq-network-fail

Possible Causes

The development board is disconnected from the PC.

Windows Firewall does not allow Visual Studio Code to access the network.

Solution
Check whether the network cable is properly connected.
Click Windows Firewall.

Figure 6 Network and firewall settings

hi3516-faq-firewall-setting

Click Firewall & network protection, and on the displayed page, click Allow applications to communicate through Windows Firewall.

Figure 7 Firewall and network protection

hi3516-faq-firewall-setting-allow

Select Visual Studio Code.

Figure 8 Selecting Visual Studio Code

hi3516-faq-firewall-find-vscode

Select the Private and Public network access rights for Visual Studio Code.

Figure 9 Allowing Visual Studio Code to access the network

hi3516-faq-firewall-vscode-allow-network

(Hi3516) No information is displayed through the serial port

Symptom

The serial port shows that the connection has been established. However, no information is displayed through the serial port after the board is restarted and Enter is pressed.

Possible Cause 1

The serial port is connected incorrectly.

Solution

Change the serial port number.

Start Device Manager to check whether the serial port connected to the board is the same as that connected to the terminal device. If the serial ports are different, correct the serial port number by following instructions in “Error: Opening COMxx: Access denied” is displayed when I start image burning.

Possible Cause 2

The U-Boot of the board is damaged.

Solution

Burn the U-Boot.

If the fault persists after you perform the preceding operations, the U-Boot of the board may be damaged. You can burn the U-Boot by performing the following steps: