[讨论] ht1622的子程序

maker 2008-9-11 14:08 楼主

/*************************************************
         *原型：void write_lcdbit(unsigned char bit)
         *功能：LCD送数
         *说明：LCD－HT1622　数据在高锁存
         *参数：bit
         *返回：无
         **************************************************/
         void write_lcdbit(unsigned char bit)
         {
            CLR_LCDWD;
            if(!bit)  CLR_LCDDATA;
            SET_LCDWD;    //数据在高锁存
            SET_LCDDATA;
         }
         /*************************************************
         *原型：void write_lcdbyte(unsigned char addr,unsigned char data)
         *功能：LCD送数
         *说明：LCD－HT1622　命令：101　100100　0101
         *参数：addr 地址，data 数据
         *返回：无
         **************************************************/
         void write_lcdbyte(unsigned char addr,unsigned char data)
         {//命令：101?
         //地址：000111
         //数据：0001
            unsigned char i;
               CLR_LCDCS;
            write_lcdbit(1);
            write_lcdbit(0);
            write_lcdbit(1);
            for(i=0;i<6;i++)//送地址
               {
               write_lcdbit(addr&0x20);
               addr<<=1;
               }
            for(i=0;i<4;i++)//送数
               {
               write_lcdbit(data&0x01);
               data>>=1;
               }
            SET_LCDCS;
         }
         /*************************************************
         *原型：void write_lcdcmd(unsigned char cmd)
         *功能：LCD送命令
         *说明：LCD－HT1622　命令：101　10010　0101
         *参数：unsigned char cmd
         *返回：无
         **************************************************/
         void write_lcdcmd(unsigned char cmd)
         {
            unsigned char i;
               CLR_LCDCS;
            write_lcdbit(1);
            write_lcdbit(0);
            write_lcdbit(0);
            for(i=0;i<8;i++)
            {
               write_lcdbit(cmd&0x80);
               cmd<<=1;
               }
               write_lcdbit(1);
            SET_LCDCS;
         }
         /*************************************************
         *原型：void update_lcd(unsigned char *p,unsigned char length)
         *功能：将显示缓冲区数据写入LCD ，长度为length
         *说明：LCD－HT1622
         *参数：*p  指向显示缓冲区，length 显示缓冲区长度
         *返回：无
         **************************************************/
         void update_lcd(unsigned char *p,unsigned char length)
         {
            unsigned char i,j;
               CLR_LCDCS;
               write_lcdbit(1);
            write_lcdbit(0);
            write_lcdbit(1);
            for(i=0;i<6;i++)
            {
               write_lcdbit(0);
            }
            for(i=0;i             {
               for(j=0;j<8;j++)
               {
                  write_lcdbit((*p)&0x01);
               (*p)>>=1;
               }
               p++;
            }
            SET_LCDCS;
         }