ADUC841 用方式2产生PWM波。附带串口通讯，74HC244扩展P1口，PWM波，AD转换的调试报告。和程序，正常应用。-ADUC841 generate PWM wave with mode 2. With serial communication, 74HC244 extended P1 port, PWM wave, AD conversion of the debug report. And procedures for