此程序是在keil开发环境下，用C语音写的程序，压缩包中包括向串口输出一个字符的程序，打印输出正弦波的程序，还有一个中断信号程序。均已经编译通过，并附有说明文档。-This program is in keil development environment, using C program written speech, compressed package includes a character to the serial output of the program, print the