Continuing the progress, after a very difficult week. Finally, I have successfully flashed the firmware and turned on the screen. However, the problem of IIC devices not communicating still exists. I have ordered a 26MHz crystal and a 5351. During this process, I wrote an IIC scan and testing program based on PebbleHF's firmware. The program will be included in the attachments.
The exterior has been painted a strange pink color using a hand-operated spray paint. There are also some issues with purchasing the encoder, requiring a new order.
The WorkBuddy process provided significant assistance, and the PCB author, firmware author, and creative team of the PebbleHF Discord group also provided invaluable help.
If you also want to replicate it, here are a few suggestions.
- Use low-temperature solder paste and a hot plate for soldering. This can greatly reduce the risk of damaging chips with a soldering iron or heat gun.
- When encountering problems, repeatedly check against the schematic and PCB prototype.
- To purchase components, you can search using the BOM's "Liuchang Mall" number. Chips purchased from Taobao may have a "die-short" issue; I recommend using a one-stop PCB assembly service, and I found that Hua Qiu is more affordable.
Update the images.
This week, we will focus on fixing the IIC issues. If you need an IIC testing program, please leave a message.
闽ICP备2021006864号-7
闽公网安备35020602002794号