關(guān)于12864lcd顯示屏

ID:226333 · 發(fā)表于 2017-8-9 23:11

#include "12864.h"

GPIO_InitTypeDef GPIO_InitStructure;
void Delay(__IO uint32_t nCount)
{
for(; nCount != 0; nCount--);
}

void send_dat(unsigned char dat)
{
unsigned char i;
      //GPIO_InitStructure.GPIO_Mode = GPIO_Mode_Out_PP;
for(i=0;i<8;i++)
{
            if((dat&0x80)==0x80) SID_1;
            if((dat&0x80)==0x00) SID_0;
      CLK_0;
            Delay(35);
      CLK_1;
            dat<<=1;
}
}

unsigned char get_byte()
{
   unsigned char i,temp1=0,temp2=0;
      //GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IPU;
   for(i=0;i<8;i++)
   {
         temp1=temp1<<1;
         CLK_0;
               Delay(25);
         CLK_1;
               Delay(20);
         CLK_0;
         if(GPIO_ReadOutputDataBit(GPIOE,GPIO_Pin_3)) temp1++;
   }
   for(i=0;i<8;i++)
   {
         temp2=temp2<<1;
         CLK_0;
               Delay(25);
         CLK_1;
               Delay(25);
         CLK_0;
         if(GPIO_ReadOutputDataBit(GPIOE,GPIO_Pin_3))  temp2++;
   }
      //GPIO_InitStructure.GPIO_Mode = GPIO_Mode_Out_PP;
   return ((0xf0&temp1)+(0x0f&temp2));
}

void check_busy()
{
do
{
      send_dat(0xfc);
}
while((get_byte()&0x8000)==0x8000);
}

void send_cmd(unsigned char cmd)
{
check_busy();
send_dat(0xf8); //
send_dat(cmd&0xf0); //
send_dat((cmd&0x0f)<<4); //
}

void write_char(unsigned char dat)
{
check_busy();
send_dat(0xfa);//rw=0;rs=1
send_dat(dat&0xf0);
send_dat((dat&0x0f)<<4);
}

void lcd_clear()       //清除顯示
{
send_cmd(0x01);
}

void lcd_pos(unsigned char y_add , unsigned char x_add)
{
switch(y_add)
{
      case 1:
      send_cmd(0X80|x_add);break;
      case 2:
      send_cmd(0X90|x_add);break;
      case 3:
      send_cmd(0X88|x_add);break;
      case 4:
      send_cmd(0X98|x_add);break;
      default:break;
}
}

void lcd_wstr(unsigned char y_add , unsigned char x_add , unsigned char *str) //
{
unsigned char i;
lcd_pos(y_add , x_add);
for(i=0;str[i]!='\0';i++)
{
      write_char(str[i]);
}

}

void write_figer(unsigned char y_add , unsigned char x_add , unsigned int figer)//在任何位置寫數(shù)字
{
unsigned char d[5],i,j;
lcd_pos(y_add , x_add);
d[4]=figer%10;
d[3]=figer%100/10;
d[2]=figer%1000/100;
d[1]=figer%10000/1000;
d[0]=figer/10000;
for(i=0;i<5;i++)
{
      if(d[i]!=0)break;
}

if(i==5)i--;

if(i==4)send_dat(0x30);//數(shù)據(jù)裝完，準(zhǔn)備發(fā)送

for(j=i;j<5;j++)
{
   send_dat(d[j]|0x30);//取得的數(shù)字加上0x30也即得到該數(shù)字的ASCII碼，再將該數(shù)字發(fā)送去顯示
}

}

void lcd_init()    //
{

Delay(0xfff);
send_cmd(0x30);
send_cmd(0x0C);//0000,1100 整體顯示，游標(biāo)off，游標(biāo)位置off
send_cmd(0x01);//0000,0001 清DDRAM
send_cmd(0x02);//0000,0010 DDRAM地址歸位
send_cmd(0x80);//1000,0000 設(shè)定DDRAM 7位地址000，0000到地址計數(shù)器A
}

/******************* (C) COPYRIGHT 2011 奮斗STM32 *****END OF FILE****/

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關(guān)于12864lcd顯示屏