我的硬件是别人做的。
所以就只能按着硬件来。
//LCD左半屏写数据
void LCD_Write_DatL(unsigned char x)
{
DDRA=0x00;
while(bit_is_set(PINA,7))
{ //200a
SET_RW; //a1 = 1
SET_cs1; //a2 = 0
CLR_cs2; //a3 = 1
LCD_NOP();
CLR_RS; //a0 = 0
SET_E;
}
DDRA=0xff;
LCD_NOP(); //2009
CLR_E; //
SET_cs1; //a2 = 0
CLR_cs2; //a3 = 1
SET_RS; //a0 = 1
CLR_RW; //a1 = 0
PORTA=x;
SET_E;
CLR_E;
//SET_cs1;
//SET_cs2;
}
在这里我不太明白A13的用途。就一直将其置高。算出的地址如上。
程序重新改为：
//LCD左半屏写命令字
void LCD_Write_ComL(unsigned char x)
{
while(bit_is_set(*CRADDL,7));
*CWADDL = x;
}
//左半屏写数据
void LCD_Write_DatL(unsigned char x)
{
while(bit_is_set(*CRADDL,7));
*DWADDL = x;
}
//LCD右半屏写命令字
void LCD_Write_ComR(unsigned char x)
{
while(bit_is_set(*CRADDR,7));
*CWADDR = x;
}
//LCD右半屏写数据
void LCD_Write_DatR(unsigned char x)
{
while(bit_is_set(*CRADDR,7));
*DWADDR = x;
}
结果还是不行。
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楼主
