1621drive.c

来自「1621段码驱动LCD C语言源程序[网络下载资料]」· C语言 代码 · 共 72 行

#define LCD_ON          0x8060
#define LCDOFF          0x8000
#define SYS_EN          0x8020
#define BAIS_4          0x8520

//发1621命令控制字
//w1=命令字
void LCD_CMD(void)
{
LCD_CS = 0;
for (lcdi=0;lcdi<12;lcdi++) {
    if (w1&0x8000) LCD_DA=1;
    else LCD_DA=0;
    LCD_CK = 0;
    LCD_CK = 1;
    w1 <<= 1;
}
LCD_CS = 1;
LCD_DA = 1;
}

//初始化1621
void LCD_SETUP(void)
{
  w1 = LCD_ON;
  LCD_CMD();
  w1 = SYS_EN;
  LCD_CMD();
  w1 = BAIS_4;
  LCD_CMD();
}

//发送显示数据引导
void LCD_WRITE_HEAD(void)
{
LCD_DA = 1;    //1
LCD_CK = 0;
LCD_CK = 1;

LCD_DA = 0;    //0
LCD_CK = 0;
LCD_CK = 1;

LCD_DA = 1;    //1
LCD_CK = 0;
LCD_CK = 1;
}

//LCD送4位显示码
//输入: lcdk = 4位
//      lcdj = 偏移地址
void LCD_DISP(void)
{
LCD_CS = 0;
LCD_WRITE_HEAD();
for (lcdi=0;lcdi<6;lcdi++) { //set offset address
    if (lcdj&0x20) LCD_DA=1;
    else LCD_DA=0;
    LCD_CK=0;
    LCD_CK=1;
    lcdj<<=1;
}
for (lcdi=0;lcdi<4;lcdi++) { //data output
    if (lcdk&0x08) LCD_DA=1;
    else LCD_DA=0;
    LCD_CK=0;
    LCD_CK=1;
    lcdk<<=1;
}
LCD_CS = 1;
}