Introduction - If you have any usage issues, please Google them yourself
// the AVR program of the experimental board, the eeprom operation exercise, and the computer communication, first send the data saved in the chip
// then it receives the data sent by the PC and saves it, then reads the data back to the PC, and the data is not lost after the power outage.
// connection definition: connect the serial port via rs232 to PC or pw6-7/8.
// notes: this program is intended to understand and demonstrate the use of eeprom in the film, which is suitable for beginners.
// use of 8MHz crystals.