PSoc4的SPI模块使用中断的方式接收数据(SPI工作在从机模式下)，在中断中使用串口将接收到的数据转发出去，实现了一个SPI转串的简单验证工具。-PSoc4 the SPI module interrupt receiving data (SPI in slave mode), using the serial port of the received data in the interrupt forwarded to achieve a simple SPI transfer verif