config中有一段是这样的，应该是说电压检测的。
/********************************************************************/
/**** powermeter (battery capacity monitoring) ****/
/********************************************************************/
/* enable monitoring of the power consumption from battery (think of mAh)
allows to set alarm value in GUI or via LCD
Full description and howto here http://www.multiwii.com/wiki/index.php?title=Powermeter
Two options:
1 - hard: - (uses hardware sensor, after configuration gives very good results)
2 - soft: - (good results +-5% for plush and mystery ESCs @ 2S and 3S, not good with SuperSimple ESC) */
//#define POWERMETER_SOFT
//#define POWERMETER_HARD
/* PLEVELSCALE is the step size you can use to set alarm */
#define PLEVELSCALE 50 // if you change this value for other granularity, you must search for comments in code to change accordingly
/* larger PLEVELDIV will get you smaller value for power (mAh equivalent) */
#define PLEVELDIV 5000 // (*) default for soft - if you lower PLEVELDIV, beware of overrun in uint32 pMeter
#define PLEVELDIVSOFT PLEVELDIV // for soft always equal to PLEVELDIV; for hard set to 5000
#define PSENSORNULL 510 // (*) set to analogRead() value for zero current; for I=0A my sensor gives 1/2 Vss; that is approx 2.49Volt;
#define PINT2mA 13 // (*) for telemtry display: one integer step on arduino analog translates to mA (example 4.9 / 37 * 100 作者: Smartype 时间: 2012-11-13 10:03
不用这么麻烦