at91sam9260的linux的ADC驱动，8位精度，可以修改成10位模式，AIN0--AIN3,四通道输入。应外附上测试程序，方便调试。-at91sam9260 of linux the ADC driver, 8-bit precision, can be modified into a 10-bit mode, AIN0- AIN3, four-channel input. Outside the testing procedure should be attached to faci