¶ BMCU Flashing Tutorial (Serial Port Flashing)
¶ ⚠️ WARNING
🔥 Before flashing, ensure there are no soldering issues!!!! Check for power short circuits!!!! 🔥
🔥 Before flashing, ensure there are no soldering issues!!!! Check for power short circuits!!!! 🔥
🔥 Before flashing, ensure there are no soldering issues!!!! Check for power short circuits!!!! 🔥
¶ Required Tools
- Multiple Dupont Wires (To connect the flasher and the BMCU mainboard).
- USB to Serial Adapter
- Computer.
- Software: WCHISPTool
wchisptool-v3.3.7z
¶ Flashing Tutorial
-
Connect the BMCU Mainboard and USB Serial Tool According to the Wiring Instructions
- ⚠️ DO NOT CONNECT THE BMCU TO THE PRINTER DURING WHOLE PROCESS!!!!!! 🚨
- ⚠️ DO NOT CONNECT THE BMCU TO THE PRINTER DURING WHOLE PROCESS!!!!!! 🚨
-
Connect the USB Serial Tool to the Computer
- The computer should automatically recognize the serial port.
- Refer to the diagram for guidance, but note that your serial port number may differ from the one shown in the image.
-
Press and Hold the B Button
- Use your left hand to press and hold the B button (Do not release it!).
- With your right hand, press the R button once, then release it.
- ⚠️ The B button should ideally remain pressed throughout the process.
-
Open the WCHISPTOOL Software
- Select the corresponding MCU series, model, download method, and check the necessary download configuration options.
- Follow the steps below to proceed.
- If the message
"Unlock read/write protection successful!"appears, the operation was successful. ✅
-
Click the Download Button
- Be patient while the download process completes.
- If the download is successful, it should look like the reference image.
- ⚠️ If the download fails, try selecting 115200 baud rate.
-
Press the R Button
- At this point, press the R button, and the BMCU mainboard's red LED should light up.
- 🎉 Congratulations! The firmware flashing is successful! 🎉
¶ Troubleshooting
- Ensure the baud rate is set to 115200.
- Check the stability of the Dupont wire connections.
- Each time you download, you must click "Touch Protection" before proceeding.
¶ Testing
⚠️⚠️⚠️Avoid hot plugging and unplugging the motherboard and printer cables.⚠️⚠️⚠️
The right approach（just in case you are not sure what to do):
- Power off the printer
- Connect the BMCU to the printer
- Switch on the printer power
- You should see AMS appear in the consumables option, even if you have not inserted consumables, it may show that consumables are present in some channels (known bug)
- Power off the printer
- Disconnect the BMCU cable