PIC16887A单片机通过拨码盘SW1选择AD通道，3位拨号开关DSW1选择AD结果对齐方式和参考电压（Vref+）与（Vref－），AD结果在C口和D口上的LED直接显示，如果有错误，在RB7的LED显示，并在C口上显示相应的错误信息。-PIC16887A MCU by dialing code disc SW1 select AD channel, three-dial switch DSW1 select AD results of alignment and the reference voltage (Vref+) and (Vref-), AD results in the C port and D port on the LED directly to show that if there is an error In RB7 the LED display, and the C port on the display appropriate error message.