MSP430F249单片机通过TB的PWM输出功能，实现一定频率脉冲输出，可以通过调用函数，修改输出脉冲频率，接口处不会产生错误频率。-MSP430F249 microcontroller PWM output function by TB to achieve a certain frequency pulse output, you can call the function, modify the output pulse frequency, the interface does not generate an error frequency.