MSP430系列代码比较详细msp430x20x1_ca_01.c Comp_A, Output Reference Voltages on P1.1 msp430x20x1_ca_02.c Comp_A, Detect Threshold, Set P1.0 if P1.1 > 0.25*Vcc msp430x20x1_ca_03.c Comp_A, Simple 2.2V Low Battery Detect msp430x20x3_1.c Software Toggle P1.0