//*******************************************
//*函数名称:void LCD_CheckBusy(void) *
//*函数功能:并行方式查忙 *
//*形式参数:无 *
//*形参说明:无 *
//*返回参数:无 *
//*使用说明:无 *
//*******************************************
void LCD_CheckBusy(void)
{
#if PARALLEL == 1
unsigned char temp;
LCD_DATA_IN(); //P1 = 0xff; //输入前置1
LCD_RS_LOW(); //RS = 0; //指令
LCD_RW_HIGH(); //RW = 1; //读模式
_delay_us(5); //延时
LCD_E_HIGH(); //E = 1; //使能
do
{
temp = LCD_DATA_GET(); //temp = BUSY;
}
while( 0x80==(temp&0x80) ); //等待不忙,temp=0x00时不忙
LCD_E_LOW(); //E = 0;
//_delay_ms(20);
#else
unsigned char temp = 0xFC,temp2;
do
{
LCD_SendByte(temp);
temp = LCD_ReceiveByte();
temp2 = LCD_ReceiveByte();
temp &= 0x80;
}while( temp==0x80 );
#endif //#if PARALLEL == 1
}
void LCD_CHAR(unsigned char data)
{
LCD_E_LOW();
LCD_RS_HIGH();
LCD_DATA(data);
LCD_E_HIGH();
tme_tempo(1);
LCD_E_LOW();
}
//************************************************************************************
//*函数名称:void LCD_Write(unsigned char Data_Command , unsigned char uc_Content ) *
//*函数功能:并行模式向LCD发送数据或指令 *
//*形式参数:unsigned char Data_Command , unsigned char uc_Content *
//*形参说明:数据或指令的标志位,指令或数据的内容 *
//*返回参数:无 *
//*使用说明:无 *
//************************************************************************************
void LCD_Write( unsigned char Data_Command , unsigned char uc_Content )
{
#if PARALLEL == 1
LCD_CheckBusy();
LCD_DATA_OUT();
if(Data_Command)
{
LCD_RS_HIGH(); //RS = 1; //数据
//LCD_RW_LOW(); //RW = 0; //写模式
}
else
{
LCD_RS_LOW(); //RS = 0; //指令
//LCD_RW_LOW(); //RW = 0; //写模式
}
LCD_RW_LOW(); //RW = 0; //写模式
LCD_DATA_PORT = uc_Content;//数据放到P1口上
LCD_E_HIGH(); //E = 1;
_delay_us(1); //延时
//_nop_();//很重要
//_nop_();
//_nop_();
LCD_E_LOW(); //E = 0;
#else
unsigned char temp;
LCD_CheckBusy();
if(Data_Command)
{
temp = 0xFA; //RS = 1,数据; RW = 0,写模式
}
else
{
temp = 0xF8; //RS = 0,指令; RW = 0,写模式
}
LCD_SendByte(temp);
temp = uc_Content&0xF0;
LCD_SendByte(temp);
temp = (uc_Content<<4)&0xF0;
LCD_SendByte(temp);
#endif //#if PARALLEL == 1
}
//********************************************
//*函数名称:LCD_ReadData *
//*函数功能:并行读LCD数据 *
//*形式参数:无 *
//*形参说明:无 *
//*返回参数:读回的数据 *
//*使用说明:无 *
//********************************************
unsigned char LCD_ReadData(void)
{
#if PARALLEL == 1
unsigned char uc_Content;
LCD_CheckBusy();
//_delay_us(2);
LCD_DATA_IN(); //P1 = 0xff;//输入前置1
LCD_RS_HIGH(); //RS = 1; //数据
LCD_RW_HIGH(); //RW = 1; //读模式
LCD_E_HIGH(); //E = 1; //使能
_delay_us(1); //延时很重要
uc_Content = LCD_DATA_GET(); //uc_Content = P1; //P1口的内容放到变量中
LCD_E_LOW(); //E = 0;
_delay_us(1); //延时很重要
return uc_Content;
#endif //#if PARALLEL == 1
}
