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1、把本节课的指针相关内容，反复学习3到5遍，彻底弄懂指针是怎么回事，即使是死记硬背也要记住，等到后边用的时候可以实现顿悟。学会指针，就是突破了C语言的一道壁垒。

2，1602所有的指令功能都应用一遍，能够灵活使用1602液晶显示任意字符串。

‘

#include <reg52.h>#define LCD1602_DB  P0
sbit LCD1602_RS = P1^0;
sbit LCD1602_RW = P1^1;
sbit LCD1602_E  = P1^5;void InitLcd1602();
void LcdShowStr(unsigned char x, unsigned char y, unsigned char *str);void main()
{unsigned char str[] = "Kingst Studio";InitLcd1602();LcdShowStr(2, 0, str);LcdShowStr(0, 1, "Welcome to KST51");while (1);
}
void LcdWaitReady()
{unsigned char sta;LCD1602_DB = 0xff;LCD1602_RS = 0;LCD1602_RW = 1;do{LCD1602_E = 1;sta = LCD1602_DB; 	LCD1602_E = 0;}while (sta & 0x80); 
}
void LcdWriteCmd(unsigned char cmd)
{LcdWaitReady();LCD1602_RS = 0;LCD1602_RW = 0;LCD1602_DB = cmd;LCD1602_E  = 1;LCD1602_E  = 0;
}
void LcdWriteDat(unsigned char dat)
{LcdWaitReady();LCD1602_RS = 1;LCD1602_RW = 0;LCD1602_DB = dat;LCD1602_E  = 1;LCD1602_E  = 0;
}void LcdSetCursor(unsigned char x, unsigned char y)
{unsigned char addr;if(y == 0)addr = 0x00 + x;elseaddr = 0x40 + x;LcdWriteCmd(addr | 0x80); 
}
void LcdShowStr(unsigned char x, unsigned char y, unsigned char *str)
{
LcdSetCursor(x, y);while (*str != '\0')LcdWriteDat(*str++);
}
void InitLcd1602()
{LcdWriteCmd(0x38);  LcdWriteCmd(0x0C); LcdWriteCmd(0x06);  LcdWriteCmd(0x01);  
}

3、尝试通过串口调试助手下发字符在1602液晶上显示出来。