[医][=upper airway resistance]上气道阻力
The problem with your UART baudrate may be clock related.
您的UART波特率问题可能是系统时钟造成的.
UART allow to full duplex communication at serial link circuit.
UART允许在串行链路上进行全双工的通信.
UART sample code for AVR source code integrity, and can be used directly.
示例代码的UART的AVR源代码完整, 并可以直接使用.