dac0832的应用，基于at89s52，用52控制转换，精确到小数点后一位，从0.0—5.0以0.1的精度对电压进行转换，并在lcd上显示当前输出的电压值，便于测试-dac0832 application, based on the at89s52, with 52 control conversion, accurate to one decimal, from 0.0-5.0 to 0.1 the accuracy of the conversion of voltage and current in the lcd display output voltage value, easy to test