写汇编代码实现一个圆形的先入先出（FIFO）缓冲器…

代码说明：

To write assembly code to implement a circular First In First Out (FIFO) buffer in the data memory of PIC18F452 microcontroller, using the microcontroller’s direct addressing mode and indirect addressing mode. This code serves as an assembly program template. For detailed information, refer to the PIC18F452 datasheet, MPLAB IDE user guide, as well as MPASM user guide on the course web page.