HT1621驱动LCD问题

只看该作者 · 2008-7-17 15:40

我用AVR单片机控制HT1621驱动LCD，程序烧写后LCD只能全屏都显示，不能够通过更改显存数组中的值来控制LCD中某一段的显示的内容，也不能清屏，请给位帮我看看这个程序是否有问题，谢谢！

#include <iom48v.h>          //AVR头文件

typedef unsigned char            uint8;
typedef unsigned int             uint16;
typedef unsigned long int        uint32;
typedef signed char              sint8;
typedef signed int               sint16;
typedef signed long int          sint32;

//Lcd显示定义

//HT1621的WR引脚对应AVR的PORT口的PIN位置，在具体应用中要修改X
#define LCD_wr             3

//HT1621的DATA引脚对应AVR的PORT口的PIN位置，在具体应用中要修改X
#define LCD_data         4

//HT1621的CS引脚对应AVR的PORT口PIN的位置，在具体应用中要修改X
#define LCD_cs             2

//HT1621的WR引脚对应AVR的PORT口，在具体应用中要修改X
#define LCDWRPORT    PORTC

//HT1621的DATA引脚对应于AVR的PORT口，在具体应用中要修改X
#define LCDDATAPORT  PORTC

//HT1621的CS引脚对应于AVR的PORT口，在具体应用中要修改X
#define LCDCSPORT     PORTC

//定义LCD显示缓冲区的空间
#define BuffSize 32

#define SYSEN      0x01
#define LCDOFF     0x02
#define LCDON      0x03
#define BAIS1_2    0X28
#define BAIS1_3    0X29
#define RC256K     0x18
#define TONEON     0x09
#define TONEOFF    0x08
#define TONE4K     0x40
#define TONE2K     0x60

#define NOP        #asm("nop")

//将DATA的高X位写入HT1621
void SendHBit1621(uint8 data,uint8 x);

//将DATA的低X位写入HT1621
void SendLBit1621(uint8 data,uint8 x);

//写入命令
void PutLcdCommand(uint8 Command);

//写入1个地址
void PutLcdOnedata(uint8 ADD,uint8 DATA);

//显示LCD缓冲区内容从start~~end<BuffSize
void PutLcdAllData(uint8 start,uint8 end);

//对LCD缓冲区写相同数
void PutLcdClear(uint8 start,uint8 end,uint8 x);

//LCD初始化
void LCDInit(void);

//LCD缓冲区
// uint8 LcdBuff[BuffSize];

uint8 LcdBuff[BuffSize]={0XFF,0XFF,0XFF,0XFF,0XFF,0XFF,0,0,0,0,0,0,0,0,0,0,
                         0,0,0XFF,0XFF,0XFF,0XFF,0XFF,0XFF,0XFF,0XFF,0XFF,0XFF,0XFF,0XFF,0XFF,0XFF};

//------------------------------------------------------------------------------
//DATA的高X位写入HT1621
void SendHBit1621(uint8 data,uint8 x)
    {
     uint8 i;
     for (i=0;i<x;i++)
        {
         //LCDWRPORT&=(0<<LCD_wr);
         LCDWRPORT&=~(1<<LCD_wr);
         NOP;//
         NOP;//
         NOP;//
         if ((data&0x80)==0){LCDDATAPORT&=~(1<<LCD_data);}
         else {LCDDATAPORT|=(1<<LCD_data);}
         NOP;

         NOP;//
         NOP;//
         LCDWRPORT|=(1<<LCD_wr);
         NOP;

         NOP;//
         NOP;//
         data<<=1;
         NOP;//
         NOP;//
        }
     }
//------------------------------------------------------------------------------
//将DATA的低X位写入HT1621
void SendLBit1621(uint8 data,uint8 x)
    {
     uint8 i;
     for (i=0;i<x;i++)
         {
          LCDWRPORT&=~(1<<LCD_wr);
          NOP;//
          NOP;//
          NOP//
          if ((data&0x01)==0){LCDDATAPORT&=~(1<<LCD_data);}
          else{LCDDATAPORT|=(1<<LCD_data);}
          NOP;

          NOP;//
          NOP;//
          LCDWRPORT|=(1<<LCD_wr);
          NOP;

          NOP;//
          NOP;//
          data>>=1;
          NOP;//
          NOP;//
       }
     }
//------------------------------------------------------------------------------
//写入命令
void PutLcdCommand(uint8 Command)
    {
    LCDCSPORT&=~(1<<LCD_cs);       //LCD数据命令有效
    NOP;//
    NOP;//
    SendHBit1621(0x80,3);   //写入标志码"100"
    SendHBit1621(Command,9);//写入9位数据,前8位为Command命令
                              //后一位任意
    NOP;//
    NOP;//
    LCDCSPORT|=(1<<LCD_cs);      //LCD数据命令无效
    NOP;//
    NOP;//
   }
//------------------------------------------------------------------------------
//写入1个地址
void PutLcdOnedata(uint8 ADD,uint8 DATA)
    {
    LCDCSPORT&=~(1<<LCD_cs);       //LCD数据命令有效
    NOP;//
    NOP;//
    SendHBit1621(0xa0,3);   //写入标志码"101"
    SendHBit1621(ADD<<2,6); //写入6位地址
    SendLBit1621(DATA,4);   //写入4位数据
    NOP;//
    NOP;//
    LCDCSPORT|=(1<<LCD_cs);       //LCD数据命令无效
    NOP;//
    NOP;//
   }
//------------------------------------------------------------------------------
//显示LCD缓冲区内容 Disp_LcdBuff[starts]~Disp_LcdBuff[end]
void PutLcdAllData(uint8 start,uint8 end)
     {
      uint8 i;
      LCDCSPORT&=~(1<<LCD_cs);       //LCD数据命令有效
      NOP;//
      NOP;//
      SendHBit1621(0xa0,3);   //写入标志码"101"
      SendHBit1621(0x00,6);   //写入6位起始地址
      for (i=start;i<=end;i++){
           SendLBit1621(LcdBuff,4);}//写入4位数据
      NOP;//
      NOP;//
      LCDCSPORT|=(1<<LCD_cs);       //LCD数据命令无效
      NOP;//
      NOP;//
     }
//------------------------------------------------------------------------------
//对LCD缓冲区写相同数
void PutLcdClear(uint8 start,uint8 end,uint8 x)
    {
     uint8 i;
     for (i=start;i<=end;i++)
          {LcdBuff=x;}
    }
//------------------------------------------------------------------------------
//LCD初始化
void LCDInit(void)
     {
PutLcdCommand(RC256K);
PutLcdCommand(SYSEN);        //打开系统振荡器
PutLcdCommand(BAIS1_3);      //设置偏压和占空比,BAIS1_3为1/3偏压4个公共口
PutLcdCommand(TONE4K);
PutLcdCommand(LCDON);        //打开偏压发生器 LCDON
     }

//------------------------------------------------------------------------------
    //端口初始化
void port_init(void)
{
PORTC = (1<<PC0)|(1<<PC1)|(1<<PC2)|(1<<PC3)|(1<<PC4)|(1<<PC5)|(1<<PC6);
    DDRC  = (1<<PC0)|(1<<PC1)|(1<<PC2)|(1<<PC3)|(1<<PC4)|(1<<PC5)|(0<<PC6);
}
//------------------------------------------------------------------------------

void main(void)
       {
        //AVR_CPU初始化函数
        port_init();
        LCDInit();//HT1621初始化
        while(1)
               {
                 //缓冲器赋值函数
                 PutLcdAllData(0,BuffSize);//显示LCD缓冲器内容
               }
       }

HT1621驱动LCD问题

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