Introduction - If you have any usage issues, please Google them yourself
General textbook on the procedures provided by the UART transceivers often use a round robin (Polling) a simple manner to send and receive code. But for high-speed AVR speaking, this approach greatly reduces the efficiency of MUC. When using the AVR should be based on the characteristics of the chip itself (on-chip high-capacity data device RAM, more suitable for high-level language for writing system programs), the preparation of highly efficient and reliable UART transceiver interface (lower) program. The following is a typical USART interface program.