这是一个用C语言写的SPI读写FPGA的典型代码，具有一定的参照开发价值-This is a C language reader wrote SPI typical FPGA code has some reference value for development

基于FPGA的串口通信，PC给FPGA发送数据，FPGA收到数据并返回给PC-FPGA-based serial communications, PC to the FPGA to send data, FPGA Receive data and return to the PC

用于控制3个独立的全双工传输的UART/RS232接口。该接口由Altera SOPC 实现，开发环境为NIOS II。在Statrix II上工作正常。 每个接口可独立配置为短数据模式和数据流模式。-This C source file is used for controling three UART/RS232 interfaces . These interfaces are implemented by Altera s SOPC module , assembled in a S