不带字库的LCD12864显示问题

只看该作者 · 2014-7-16 19:54

小弟找了一个程序，程序下进去之后测各个脚都有波形，但是就是没有任何显示，还烦请高手帮小弟看看是那里的问题。程序如下：
#include<stm32f4xx.h>

#define uint unsigned int
#define uchar unsigned char

void Delay(uint z);

//我用的是 D.8 D.9 D.10 D.11
#define DI    GPIO_Pin_11
#define RW    GPIO_Pin_12
#define EN    GPIO_Pin_13
#define CS1    GPIO_Pin_14
#define CS2    GPIO_Pin_15

/*--  文字:  欢  --*/
/*--  宋体12;  此字体下对应的点阵为：宽x高=16x16 --*/
uchar huan[] = {0x00,0x80,0x00,0x80,0xFC,0x80,0x04,0xFC,0x05,0x04,0x49,0x08,0x2A,0x40,0x14,0x40,
            0x10,0x40,0x28,0xA0,0x24,0xA0,0x45,0x10,0x81,0x10,0x02,0x08,0x04,0x04,0x08,0x02,};

void RCC_Configuration(void) //推挽输出模式，管脚配置，不多解释，库函数有
{
  GPIO_InitTypeDef GPIO_InitStructure;

  RCC_AHB1PeriphClockCmd(RCC_AHB1Periph_GPIOB, ENABLE);
  GPIO_InitStructure.GPIO_Pin = DI|RW|EN|CS1|CS2;
  GPIO_InitStructure.GPIO_Mode = GPIO_Mode_OUT;
  GPIO_InitStructure.GPIO_OType = GPIO_OType_PP;
  GPIO_InitStructure.GPIO_Speed = GPIO_Speed_2MHz;
  GPIO_InitStructure.GPIO_PuPd = GPIO_PuPd_NOPULL;
  GPIO_Init(GPIOB, &GPIO_InitStructure);

  RCC_AHB1PeriphClockCmd(RCC_AHB1Periph_GPIOD, ENABLE);
  GPIO_InitStructure.GPIO_Pin = GPIO_Pin_0|GPIO_Pin_1|GPIO_Pin_2|GPIO_Pin_3|
                              GPIO_Pin_4|GPIO_Pin_5|GPIO_Pin_6|GPIO_Pin_7;
  GPIO_InitStructure.GPIO_Mode = GPIO_Mode_OUT;
  GPIO_InitStructure.GPIO_OType = GPIO_OType_PP;
  GPIO_InitStructure.GPIO_Speed = GPIO_Speed_2MHz;
  GPIO_InitStructure.GPIO_PuPd = GPIO_PuPd_NOPULL;
  GPIO_Init(GPIOD, &GPIO_InitStructure);
}

/*写指令函数*/
void LCD_write_cmmand(uchar cmd)
{
   GPIO_ResetBits(GPIOB,DI);
   GPIO_ResetBits(GPIOB,RW);
   GPIO_ResetBits(GPIOB,EN);

   GPIO_Write(GPIOD, cmd);
   Delay(50000);
   GPIO_SetBits(GPIOB,EN);
   Delay(50000);
   GPIO_ResetBits(GPIOB,EN);
}

/*写数据函数*/
void  LCD_write_data(uchar dat)
{
   GPIO_SetBits(GPIOB,DI);
   GPIO_ResetBits(GPIOB,RW);
   GPIO_ResetBits(GPIOB,EN);

   GPIO_Write(GPIOD, dat);
   Delay(50000);
   GPIO_SetBits(GPIOB,EN);
   Delay(50000);
   GPIO_ResetBits(GPIOB,EN);
}

void selectscreen(uchar screen)       //选屏
{
switch(screen)
{
   case 0:                         //全屏
      GPIO_ResetBits(GPIOB,CS1);
      GPIO_ResetBits(GPIOB,CS2);
   break;
   case 1:                         //选左半屏
      GPIO_ResetBits(GPIOB,CS1);
      GPIO_SetBits(GPIOB,CS2);
   break;
   case 2:                         //选右半屏
      GPIO_SetBits(GPIOB,CS1);
      GPIO_ResetBits(GPIOB,CS2);
   break;
   default:
   break;
}
}

void clearscreen(uchar screen) //清屏
{
uchar i,j;
selectscreen(screen);
for(i=0xb8;i<0xc0;i++)                   //控制页数0--7，共8页
{
      LCD_write_cmmand(i);
      LCD_write_cmmand(0x40);
      for(j=0;j<64;j++)             //控制列数0-63，共64列
      {
      LCD_write_data(0x00);             //写入0，地址指针自加1
      }
}
}

/*LCD显示汉字字库函数*/
void lcd_display_hanzi(uchar screen,uchar page,uchar lie,uint mun)
{
   //screen:选择屏幕参数，page:选择页参数0-3，lie列参数0-3，mun:显示第几个汉字的参数
   int i; //page页其实就是行，是行计数器页指针共九位计数器，高三位为X，低六位为Y
   mun=mun*32;
   selectscreen(screen) ; //片选看哪个段
   LCD_write_cmmand(0x40+(lie*16)); //一个汉字占用两个字节
   LCD_write_cmmand(0xb8+(page*2)); //一个字节显示
   for (i=0;i<16;i++)
   {
   LCD_write_data(huan[mun++]);
   }
   LCD_write_cmmand(0x40+(lie*16));
   LCD_write_cmmand(0xb8+(page*2)+1);
   for (i=0;i<16;i++)
   {
   LCD_write_data(huan[mun++]);
   }
}

/*LCD初始化函数*/
void LCD_init()
{
LCD_write_cmmand(0x3f); // 显示开启
Delay(50);
LCD_write_cmmand(0xc0); //显示起始行，从第一位开始,从0到63
Delay(50);
LCD_write_cmmand(0xb8); // 设置页得地址从0到7
Delay(50);
LCD_write_cmmand(0x40); //设置列的地址，从第一位开始,从0到63
Delay(50);
  /*  LCD_write_cmmand(0x30); // 显示开启
Delay(50);
LCD_write_cmmand(0x0c); //显示起始行，从第一位开始,从0到63
Delay(50);
LCD_write_cmmand(0x01); // 设置页得地址从0到7
Delay(50);*/
}

/*主函数*/
void main()
{
RCC_Configuration();
LCD_init();             //lcd初始化
clearscreen(0);
while(1)
{
   lcd_display_hanzi(0,0,0,0);    //欢
}
}

/*延时函数*/
void Delay(uint z)
{
  uint x,y;
  for(x=z;x>0;x--)
for(y=110;y>0;y--);
}