基于msp430f149的频率测量和ad采样功能功能的实现，用于信号合成题目，如将三个正弦波合成一个方波，测量频率，电压，其他功能通过硬件完成，如通过硬件测出频率的电压，通过ad来测波形的电压-Based msp430f149 frequency measurement and ad sampling function function for the signal synthesis topics, such as the three sine wave synthesis of a squa