设计一个程序，向62256的0000H～0013H存储单元里依次连续 写 入数据1到20。接着依次再从这些单元中读出这20个数，并求这20个数的累加和（结果应为D2H），将其通过P1口送出（仿真电路中的发光二极管D1～D8）。-Design a program to 62,256 of the 0000H ~ 0013H memory cell in order to write the data for 1-20. Followed by a further unit from the read out number 20 and number 20 for the cumulative and (the results for the D2H), I will be sent through P1 (simulation of light-emitting diode circuit D1 ~ D8).