基于MSP430G2553的频率计，代码频率可测量范围在1Hz到999MHz之间。如需要，范围可继续扩宽，频率计的误差在1 以内，并将被测频率值通过LCD12864液晶串行显示。-Based on the frequency meter MSP430G2553 code measurable frequency range of between 1Hz to 999MHz. If necessary, continue to broaden the scope, frequency meter error is less than 1 , and the measured frequency value by serial LCD12864 LCD display.