1602显示屏主要是通过 RS RW E这三个脚来进行数据读写,通过高低电平的转换进行数据的写入,写出,不过有一点就是,金沙滩上他用的单片机是C52的而我们用的是12C5a60s2的,我们的单片机运行速度比较快,这里就涉及到了时序问题,简单的说就是引脚间电平转换需要一定时间 间而我们单片机比较快,还有就是一些顺序不能颠倒不然也不会检测信号 #include<STC12C5A60S2.H>
#define LCD1602_DB P0
sbit LCD1602_RS=P2^0;
sbit LCD1602_RW=P2^1;
sbit LCD1602_E=P1^2;
void InitLcd1602();
void LcdShowStr(unsigned char x,unsigned char y,unsigned char *str);
void main()
{
unsigned char str[]="CHUANG";
InitLcd1602();
LcdShowStr(2,0,str);
LcdShowStr(0,1, "CHUANG");
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;
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);
}
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