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36 changes: 3 additions & 33 deletions docs/mars/getting-started/bootloader.md
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Expand Up @@ -154,41 +154,11 @@ Extract the downloaded `Mars-UsbFlashTool-*-Windows.zip` into the Windows system

### Upgrade Bootloader

The first 5 steps of burning the bootloader are the same as the first 5 steps of installing the driver above.

1. Connect the USB to TTL serial port cable to the 40 pin header on Mars, connect the USB to the PC and note down the serial port number

How to connect USB to serial cable: [Use Serial Console](https://milkv.io/docs/mars/getting-satrted/setup#use-serial-console)

![mars](/docs/mars/mars-usb-flash-tool_02.png)

**Note: If any other serial port program is open and using the serial port, please exit the program to release the port and avoid occupying it.**

2. Connect the PC and Mars using a USB 2.0 interface with a type A Male to Male USB data cable

![mars](/docs/mars/usba2usba.jpg)

![mars](/docs/mars/mars-usb-port-a.jpg)

3. Press and hold the upgrade button on Mars, and then power on Mars through the Type C interface. At this time, Mars will enter the upgrade mode. You can release the upgrade button to continue the operation.

![mars](/docs/mars/mars-upgrade-key.jpg)

4. Run the `UsbFlashTool-*-Windows.exe` flashing program in the flashing tool directory

![mars](/docs/mars/mars-usb-flash-tool_05.png)

5. Set the serial port number in the `Serial Setting` on the right side to the serial port number noted in step 1

![mars](/docs/mars/mars-usb-flash-tool_06.png)

6. Select `Firmware` in `File Type`, then click `File Select` to select the `usbprog-mars-230510.out` in the `update` directory, then click `Load`, and wait for the message `Complete` to appear after loading

![mars](/docs/mars/mars-usb-flash-tool_15.png)
The first 6 steps of burning the bootloader are the same as the first 5 steps of installing the driver above.

7. Flash the `SPL`

Click `File Select`, select the `SPL` firmware `u-boot-spl.bin.normal.out` to be burned, select `SPL` in `File Type`, select `FLASH` in `Memory Type`, Click `Load` to start burning firmware.
Click `File Select`, select the `SPL` firmware `mars_u-boot-spl.bin.normal.out` to be burned, select `SPL` in `File Type`, select `FLASH` in `Memory Type`, Click `Load` to start burning firmware.

![mars](/docs/mars/mars-usb-flash-tool_16.png)

Expand All @@ -198,7 +168,7 @@ The first 5 steps of burning the bootloader are the same as the first 5 steps of

8. Flash the `U-BOOT`

Click `File Select`, select the `U-BOOT` firmware `visionfive2_fw_payload.img` to be burned, select `U-Boot` in `File Type`, select `FLASH` in `Memory Type`, and then click `Load` to start burning firmware.
Click `File Select`, select the `U-BOOT` firmware `mars_visionfive2_fw_payload.img` to be burned, select `U-Boot` in `File Type`, select `FLASH` in `Memory Type`, and then click `Load` to start burning firmware.

![mars](/docs/mars/mars-usb-flash-tool_18.png)

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