RTGUI是否支持ra8875外接字库芯片（结贴）

发布于 2013-06-14 22:13:12 浏览：3992 订阅该版

8 个回答

xdzy 2013-06-15

这家伙很懒，什么也没写！

xdzy 2013-06-15

这家伙很懒，什么也没写！

aozima 2013-06-16

调网络不抓包，调I2C等时序不上逻辑分析仪，就像电工不用万用表！多用整理的好的文字，比截图更省流量，还能在整理过程中思考。

xdzy 2013-06-16

这家伙很懒，什么也没写！

```
#include <rtgui/font.h>
#include "ra8875.h"
#include "dc.h"

#ifdef RTGUI_USING_FONT_GT23L32S4W

typedef struct 
{
	rt_uint8_t   Type;	           /* 字体代码 0 表示16点阵 */
	rt_uint8_t   Background;	    /*是否带背景*/
	unsigned long  Color;	       /* 字体颜色 */
	rt_uint16_t  BackColor;	  /* 文字背景颜色*/
	rt_uint8_t   Hsize;            /*水平放大倍数*/
	rt_uint8_t   Vsize;			   /*垂直放大倍数*/
	rt_uint8_t   Hspace;		   /* 文字水平间距，单位 = 像素 */
	rt_uint8_t   Vspace;		  /* 文字行间距，单位 = 像素 */
}FONT_T;

/*字体枚举成员*/	
enum
{
	Font_16 = 0x00,   //16x16
	Font_24 = 0x40,   //24x24
	Font_32 = 0x80,	  //32x32
};

enum
{
	Font_BC = 0x00,   //带背景颜色
	Font_BT = 0x40,   //背景颜色通透
};

/*ra8875使用外部字库显示函数*/

static void rtgui_ra8875_font_draw_text(  struct rtgui_font *font, struct rtgui_dc            *dc, const char *text, rt_ubase_t len, struct rtgui_rect *rect)

{
    FONT_T *tFont = RT_NULL;
	struct rtgui_dc_hw *self = RT_NULL; 
	
	self = (struct rtgui_dc_hw *) dc;   //提取显示位置
	rect->x1 += self->owner->extent.x1;
	rect->y1 += self->owner->extent.y1;
	
	tFont = (FONT_T *)font->data;    //提取私有数据
	tFont->BackColor = rtgui_dc_get_gc(dc)->background;
	tFont->Color = rtgui_dc_get_gc(dc)->foreground;

LCD_CmdWrite(0x2A);//HOFS0   写入位置
	LCD_DataWrite(rect->x1);

LCD_CmdWrite(0x2B);//HOFS1	   
	LCD_DataWrite(rect->x1>>8);
	
	LCD_CmdWrite(0x2C);//VOFS0
	LCD_DataWrite(rect->y1); 
	
	LCD_CmdWrite(0x2D);//VOFS1	   
	LCD_DataWrite(rect->y1>>8);
	
	LCD_CmdWrite(0x40);//   文本模式
	LCD_DataWrite(0X80 | LCD_DATA);
	
	LCD_CmdWrite(0x21);//     选择CGRAM 、外部字库RAM
	LCD_DataWrite((LCD_DATA & 0x7f)| 0x20 );

LCD_CmdWrite(0x05);//   选择外部flash0
	LCD_DataWrite((LCD_DATA & 0x03)|  0x08);
	
	LCD_CmdWrite(0x06);    //字库总线时钟分频
	LCD_DataWrite(0x03);

LCD_CmdWrite(0x2F);//  GT23L32S4W、GB2312、ascll码粗笔画
	LCD_DataWrite(0x82);

LCD_CmdWrite(0x2E);//  水平间距
	LCD_DataWrite((tFont -> Hspace&0x3F) | tFont ->Type);
	
	LCD_CmdWrite(0x29);//   垂直间距
	LCD_DataWrite(tFont -> Vspace);

LCD_CmdWrite(0x22);//   水平、垂直放大倍数 是否带背景颜色
	LCD_DataWrite((LCD_DATA & 0xB0)| tFont->Hsize<<2 | tFont ->Vsize | tFont -> Background);

LCD_CmdWrite(0x60);//   背景颜色
	LCD_DataWrite((tFont -> BackColor&0x001f));

LCD_CmdWrite(0x61);//BGCR0
	LCD_DataWrite((tFont -> BackColor&0x07e0)>>5);
	
	LCD_CmdWrite(0x62);//BGCR0
	LCD_DataWrite((tFont -> BackColor&0xf800)>>11);
	
	LCD_CmdWrite(0x63);//   前景颜色
	LCD_DataWrite((tFont -> Color&0x001f));
	
	LCD_CmdWrite(0x64);//BGCR0
	LCD_DataWrite((tFont -> Color&0x07e0)>>5);
	
	LCD_CmdWrite(0x65);//BGCR0
	LCD_DataWrite((tFont -> Color&0xf800)>>11);

LCD_CmdWrite(0x02);   //开始写入
	while(*text)
		LCD_DataWrite(*text++);

LCD_CmdWrite(0x40);//   退回绘图模式
	LCD_DataWrite(0X7f& LCD_DATA); 
}

static void rtgui_ra8875_font_get_metrics(struct rtgui_font *font, const char *text, rtgui_rect_t *rect)
{
    rt_uint32_t length = 0, width = 0;
    FONT_T *ra8875_font = (FONT_T *)(font->data);

RT_ASSERT(ra8875_font != RT_NULL);
    switch(ra8875_font->Type)
	{
	  case 0x00:  width = 16;  break;
	  case 0x40:  width = 24;  break;
	  case 0x80:  width = 32;  break;
	  default:  break;
	}
	
    /* set init metrics rect */
    rect->x1 = 0;
	rect->y1 = 0;
    rect->x2 = 0;
    rect->y2 = font->height;

while (*text)
    {
        length = 0;
        while ((rt_uint8_t) * (text + length) >= 80) length ++; /* it's not a ascii character */
        rect->x2 += (width / 2) * length;
        text += length;

length = 0;
        while (((rt_uint8_t) * (text + length) < 80) && *(text + length)) length ++;
        rect->x2 += width* length;
        text += length;
    }
}

const struct rtgui_font_engine ra8875_font_engine =
{
    RT_NULL,
    RT_NULL,
    rtgui_ra8875_font_draw_text,
    rtgui_ra8875_font_get_metrics,
};

FONT_T font16 =
{
    Font_16,                     /*  字体16x16  */
	Font_BT,                  //背景颜色为通透
};

FONT_T font24 =
{
    Font_24,                     /*  字体16x16  */
	Font_BT,                  //背景颜色为通透
};

FONT_T font32 =
{
    Font_32,                     /*  字体16x16  */
	Font_BT,                  //背景颜色为通透
};

struct rtgui_font rtgui_font16 =
{
    "ic",
    16,                     /* height */
    1,                      /* refer count */
    &ra8875_font_engine,    /* font engine */
    (void *) &font16,       /* font private data */
};

struct rtgui_font rtgui_font24 =
{
    "ic",
    24,                     /* height */
    1,                      /* refer count */
    &ra8875_font_engine,    /* font engine */
    (void *) &font24,       /* font private data */
};
struct rtgui_font rtgui_font32 =
{
    "ic",
    32,                     /* height */
    1,                      /* refer count */
    &ra8875_font_engine,    /* font engine */
    (void *) &font32,       /* font private data */
};

#endif

```

呵呵，写得很烂，望大家见谅。