通过msp430f249自带的12位AD采集模拟信号，然后在液晶屏1602上显示，并通过16位的DA芯片输出，随着采集信号的变化，液晶显示与输出也随之变化。-By 12 AD analog signal acquisition msp430f249 comes, then 1602 is displayed on the LCD screen, and through the 16' s DA chip output, along with changes in the signal ac