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LCDE = E  //使能信号
写入命令
RS=L,RW=L,D0~D7=指令码，E=高脉冲。
void LcdWriteCom(unsigned char com)
{
//写入命令
	RS = 0;
	RW = 0;
	GPIO_LCD=com;
	Delay1ms(10);
	LCDE = 1; //给一个高脉冲
	Delay1ms(10);
	LCDE = 0;
}

写数据
RS=H，RW=L,D0~D7=数据，E=高脉冲。
void LcdWriteData(unsigned char dat)
{
//写入数据
	RS = 1;
	RW = 0;
	GPIO_LCD=dat;
	Delay1ms(10);
	LCDE = 1; //给一个高脉冲
	Delay1ms(10);
	LCDE = 0;
}