When I switch the jumper to run the board from the TF card, the board only outputs " CCCCC" to the terminal screen. What's the problem?
Answer
There are two reasons to cause the problem:
1. You have not used the “HP USB Disk Storage Format Tool 2.0.6.EXE” tool to format the TF card, please use the tool we provided in the product disk under 03-Tools folder;
2. If the TF card has a special write lockout function and was written protected.
