[讨论] 驱动ST7565显示汉字以及画点

fish001 2010-1-27 09:22 楼主

最近需要用ST7565来显示汉字以及画点，发现网上关于ST7565驱动显示文字的例子也不少，不过画图方面的例子就很少了。ST7565是比较常见的128*64的LCD，我这里使用模拟SPI来写ST7565，ST7565是“纵向8点下高位”类型的LCD，难点在于页(Y轴)。

如下图，这里Y=6

一个8位数据对应LCD纵向的8个格子，例如：要在Y=6地方亮一个点，把二进制0100 0000写到ST7565里，实际在纵向倒数第二个点显示一个点。

理论解释完了，接下来看看本例中实现的结果，看下图：

接下来贴上代码，由于每个厂家的ST7565的屏的接线都会有区别，所以这里就不给出写ST7565的实现，SPI_Write()就是写ST7565函数，通过LCD_CMD/LCD_CANVAS来区分是写控制命令还是图像数据。这里的字模来自Lcmzimo字模工具。

//汉字 16*16 的定义
unsigned int CHINESE_16_16[] = {32/*数据总数*/,16/*宽*/,16/*高*/};
//汉字 24*24 的定义
unsigned int CHINESE_24_24[] = {72/*数据总数*/,24/*宽*/,24/*高*/};
//ASCII 16*8 的定义
unsigned int ASCII_W8_H16[] = {16/*数据总数*/,8/*宽*/,16/*高*/};
//ASCII 24*12 的定义
unsigned int ASCII_W12_H24[] = {36/*数据总数*/,12/*宽*/,24/*高*/};
// *****************************************************
//画字函数
//参数x:X轴坐标，0~127
//参数y_pag:纵向页数，0~7，每一页等于8个纵向像素
//参数font:font的样式：{数据总数,高,宽}
//参数p:字模数组，当p=LCD_CLEAR,则是清除指定区域
// *****************************************************
void LCD_PutChar(unsigned char x,unsigned char y_pag,unsigned int *font,unsigned char *p)
{
unsigned int size=font[0];//整个数组的大小
unsigned int width=font[1];//字符的宽度
//unsigned int height=font[2]; 留着以后有用
unsigned int pagindex=1;//记录LCD页指针去到的页数
unsigned int nextpage = width;
unsigned char i,pag,colh,coll;
pag = y_pag+0xb0;
colh = x>>4; /*取y_pag的高4位*/
colh = colh | 0xf0;
colh = colh & 0x1f;
coll = x & 0x0f; /*取y_pag的低4位*/
SPI_Write(colh,LCD_CMD);
SPI_Write(coll,LCD_CMD);
SPI_Write(pag,LCD_CMD);
for (i=0;i
{
if (i == nextpage)//当前页画完，则跳转到下一页继续画
{
SPI_Write(pag+pagindex,LCD_CMD);
SPI_Write(colh,LCD_CMD);
SPI_Write(coll,LCD_CMD);
pagindex++;//换到下一页
nextpage = pagindex * width;//定义下一页在size中的位置
}
if(p==0x00)
SPI_Write(0X00,LCD_CANVAS);
else
SPI_Write(*p++,LCD_CANVAS);
}
}
// *****************************************************
//画点函数
//原理:x直接设置列,Y/8=页数，Y%8=点在纵8格的位置，Y=0,Y|=BIT7，Y=Y>>(7-Y%8)
//举例:(5,6),在列5,Y坐标在第0页的最后一点,即Y=0100 0000(倒向的二进制) 等价于 Y=0,Y|=BIT7,Y左移1位
//参数x:X轴坐标，0~127
//参数y:Y轴坐标，0~63
//参数ph:点的高度,为0时则为清除点
// *****************************************************
void LCD_DrawPoint(unsigned char x,unsigned char y,unsigned int ph)
{
unsigned char i,pag,colh,coll;
pag = y/8;//判断Y所在的页
pag = pag +0xb0;
colh = x>>4; /*取x的高4位*/
colh = colh | 0xf0;
colh = colh & 0x1f;
coll = x & 0x0f; /*取x的低4位*/
SPI_Write(colh,LCD_CMD);
SPI_Write(coll,LCD_CMD);
SPI_Write(pag,LCD_CMD);
if(ph==LCD_CLEAR)
{
SPI_Write(LCD_CLEAR,LCD_CANVAS);
return;
}
unsigned int point=0;
for(i=0;i
point|=(BIT7>>i);//点加高
point=point>>(8-ph-y%8);//加高之后移位
SPI_Write(point,LCD_CANVAS);
}
unsigned char hz16_16[]={//"你"
0x40,0x20,0xF8,0x07,0x40,0x20,0x18,0x0F,0x08,0xC8,0x08,0x08,0x28,0x18,0x00,0x00,
0x00,0x00,0xFF,0x00,0x00,0x08,0x04,0x43,0x80,0x7F,0x00,0x01,0x06,0x0C,0x00,0x00
};
unsigned char hz24_24[]={//"好"
0x00,0x40,0x40,0x40,0xFF,0xFE,0x42,0x40,0xE0,0xE0,0x40,0x00,0x08,0x08,0x08,0x08,
0xC8,0x88,0x68,0x38,0x1C,0x08,0x00,0x00,0x00,0x00,0x70,0x7F,0xCF,0x80,0x00,0xF0,
0x7F,0x0F,0x10,0x10,0x10,0x10,0x10,0x10,0xFF,0xFF,0x10,0x10,0x18,0x18,0x10,0x00,
0x00,0x40,0x20,0x10,0x0C,0x07,0x03,0x07,0x1E,0x1C,0x00,0x00,0x20,0x20,0x60,0xE0,
0x7F,0x3F,0x00,0x00,0x00,0x00,0x00,0x00};
unsigned char ascii8_16[]={// -G-
0xF0,0xF8,0x0C,0x84,0x84,0x8C,0x98,0x00,0x03,0x07,0x0C,0x08,0x08,0x07,0x0F,0x00
};
unsigned char ascii12_24[]={// -V-
0x04,0xFC,0xFC,0x04,0x00,0x00,0x00,0x04,0xFC,0xFC,0x04,0x00,0x00,0x00,0x3F,0xFF,
0xC0,0x00,0xC0,0xFF,0x3F,0x00,0x00,0x00,0x00,0x00,0x00,0x03,0x1F,0x3C,0x1F,0x03,
0x00,0x00,0x00,0x00,
};
unsigned char *hzcode;
void main()
{
WDTCTL=WDTPW+WDTHOLD; //停止WDT
LCD_Init();//初使化
LCD_SetDisplay(LCD_CLEAR);
//显示“你”
hzcode= hz16_16;
LCD_PutChar(0,0,CHINESE_16_16,hzcode);
//显示“好”
hzcode= hz24_24;
LCD_PutChar(16,1,CHINESE_24_24,hzcode);
//显示分割线
for(int x=0;x<127;x++)
LCD_DrawPoint(x,32,1);
//显示“G”
hzcode= ascii8_16;
LCD_PutChar(100,5,ASCII_W8_H16,hzcode);
//显示“V”
hzcode= ascii12_24;
LCD_PutChar(108,5,ASCII_W12_H24,hzcode);
}