FIFO中文应用笔记，对学习单片机RAM、大量数据处理很有帮助。-FIFO notes

keil编写，本工程基于CYPRESS的固件程序框架，程序中设置了4个FIFO端点，可实现批量端点间和外部RAM环路测试-keil preparation, the project CYPRESS firmware based framework, the program set up four FIFO endpoint, can be realized between the ends and external RAM volume loop testing

Also the USART automatically senses the start of transmission of RX line and then inputs the whole byte and when it has the byte it informs you(CPU) to read that data from one of its registers. The USART of AVR is very versatile and can be setup

端口环路测试 本工程基于CYPRESS的固件程序框架，程序中设置了4个FIFO端点 2个块输出端点：EP2OUT、EP4OUT 2个块输入端点：EP6IN、EP8IN 程序执行时，往EP2OUT/EP4OUT填充数据后将立即通过自动指针传送送到EP6IN/EP8IN端点（未经过外部RAM）， 来进行批量端点环路测试。 打开工程文件加下的cybulk块传输软件，选择对应端点通道（如：OUT:0X02,IN:0X86 ）设置传输数据大小 和传送的内容后，点击右