请教关于19264LCD（st7920）驱动程序问题

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15条回答

feixiang2010

1楼-- · 2020-01-23 16:28

怎么没人帮忙啊
小女子万分感谢啊

feixiang2010

2楼-- · 2020-01-23 21:25

哎调试一下午上半屏可以正常可下半屏死活不显示

feixiang2010

3楼-- · 2020-01-24 03:01

//写命令到LCD 上半屏
void write_com(unsigned char cmdcode)
{  RS_0; //RS=0;
RS_0; //RS=0;
E_1; //E =1;
  // E2_0; //
P7=cmdcode; //
E_0; //E =0;
//E2_0; //E =0;
delay(5);
}
//写命令到LCD 下半屏
void write2_com(unsigned char cmdcode)
{  RS_0; //RS=0;
E2_1; //E =1;
E_0; //E =1;
P7=cmdcode; //
E_0; //E =0;
//E2_0; //E =0;
delay(5);
}

//写数据到LCD  上半屏
void write_data(unsigned char Dispdata)
{    RS_1; //RS=1;
   E_1; //E =1;
   E2_0; //E2 =1;
      P7=Dispdata; //
   E_0; //E =0;
E2_0; //E =0;
   delay(5);
}
//写数据到LCD  下半屏
void write2_data(unsigned char Dispdata)
{ RS_1; //RS=1;
E2_1; //E2 =1;
   E_0; //E =1;
      P7=Dispdata; //
   E_0; //E =0;
E2_0; //E =0;
     delay(5);
}

//图位清屏
void clear_d()
{  unsigned char x,y;
for ( x=0;x<16;x++)
      for (y=0;y<32;y++)
      { write_com(0x34);
            write_com(0x80+y);
            write_com(0x80+x);
            write_com(0x30);
            write_data(0x00);
            write_data(0x00);
         /*for (y=0;y<32;y++)
      { write2_com(0x34);
            write2_com(0x80+y);
            write2_com(0x80+x);
            write2_com(0x30);
            write2_data(0x00);
            write2_data(0x00);
      }  */
   }

}

//初始化LCD
void lcdinit()
{
//R_W=0;
delay(5000);
write_com(0x30);
delay(20);
write_com(0x30);
delay(20);
write_com(0x0c);
delay(10);
write_com(0x01);
delay(200);
write_com(0x06);
//clear_d();
delay(200);

delay(5000);
write2_com(0x30);
delay(20);
  write2_com(0x30);
delay(20);
write2_com(0x0c);
delay(10);
write2_com(0x01);
delay(200);
write2_com(0x06);

delay(200);
  // clear_d();
delay(200);
}
好心人看看问题出在哪里