Huanghuai University Lichuang Cup Electronic Design Competition-#1001862A#-#姚佳宁#

◼Nose: Before the test flight, pay attention to the direction indicated by the white silk-screen icon on the PCB board, which is the direction of the nose. Place the aircraft directly in front of you with the nose facing forward.
◼Power switch: By default, the battery power is cut off when it is in the CHG position. When the switch is in the ON position, the quadcopter is powered on, the power indicator D12 (red light) lights up, and the program starts running.
◼D5 indicator: The program running indicator. When the power-on initialization is successful, D5 flashes quickly, indicating that the system initialization is successful.
◼USB interface: It can be used to upgrade the firmware. When the power switch is in the CHG position, the charging indicator D10 of the USB cable lights up to indicate that charging is in progress. When D10 is off, it means that charging is completed.
◼Reset button: When debugging the program, the microcontroller can be reset and run again.
◼Motor terminal: The connection point between the motor and the aircraft, the motor can be directly plugged in and unplugged to replace. When plugging in and unplugging the motor, please hold the terminal with one hand and pull out the male head of the motor with the other hand.
◼SWD interface: This interface can be used with e-Link32 for firmware upgrades and program debugging.
◼MPU9250: three-axis gyroscope + three-axis accelerometer + three-axis magnetometer, used to obtain the current attitude of the entire aircraft. ◼SI24R1: fully compatible with NRF2401, used to communicate with the remote control.
◼Expansion interface (two rows of yellow pins): This interface has SPI, IIC, serial port, AD, which can support the expansion and use of various modules. The OpenMV machine vision module uses this expansion interface. In the future, we will also develop other functional modules to expand the four-axis function.
◼Four motors: M1M3 rotates counterclockwise with B blades, and M2M4 rotates clockwise with A blades. Note: Note: Pay special attention to the corresponding position of the blades when replacing the blades