RA8889/71M/73M/76M/77延展单色位图为可变前景和背景色图形
2020-12-28
本文章主要讲解如何使用RA8889、RA8877、RA8876系列的芯片处理单色图并可扩展出不同颜色，颜色改变包括前景色和背景色，还可以使背景色为透明色。处理方法可以分为两种：1、将图片转为数组是用单片机描点写入；2、图片存入flash并用DMA调用。
注意事项：需要在芯片设置为16bpp模式下使用
方法一：单片机直接写入
第一步：首先使用瑞佑的转档软件将图片转为.h头文件并添加到工程
内容应为数组:
第二步：API函数调用
1、设置前景色与背景色函数实例:
**
BTE_MCU_Write_ColorExpansion_MCU_8bit(0,1024, 0,50,720,100,color16M_red,color16M_green,tu);
函数解释:
**
void BTE_MCU_Write_ColorExpansion_MCU_8bit
(
unsigned long Des_Addr //start address of Destination
,unsigned short Des_W //image width of Destination (recommend = canvas image width)
,unsigned short XDes //coordinate X of Destination
,unsigned short YDes //coordinate Y of Destination
,unsigned short X_W //Width of BTE Window
,unsigned short Y_H //Length of BTE Window
,unsigned long Foreground_color
/*Foreground_color : The source (1bit map picture) map data 1 translate to Foreground color by color expansion*/
,unsigned long Background_color
/*Background_color : The source (1bit map picture) map data 0 translate to Foreground color by color expansion*/
,const unsigned char *data // 8-bit data
)2、改变前景色并设置背景色为透明色实例:
**
BTE_MCU_Write_ColorExpansion_Chroma_key_MCU_8bit(0,1024, 0,0,200,100,0xff00,tu);
函数解释:
**
void BTE_MCU_Write_ColorExpansion_Chroma_key_MCU_8bit
(
unsigned long Des_Addr //start address of Destination
,unsigned short Des_W //image width of Destination (recommend = canvas image width)
,unsigned short XDes //coordinate X of Destination
,unsigned short YDes //coordinate Y of Destination
,unsigned short X_W //Width of BTE Window
,unsigned short Y_H //Length of BTE Window
,unsigned long Foreground_color
/*Foreground_color : The source (1bit map picture) map data 1 translate to Foreground color by color expansion*/
,const unsigned char *data //8-bit data
)方法二：将图片烧入FLASH
第一步：通过瑞佑的转档软件将图片转为bin档并烧入FLASH
第二步：API函数调用
1、改变背景色和前景色
**
/设定第二个图层作为DMA图层，只能设置为8bpp或者16bpp模式/
Canvas_Image_Start_address(1024*600*3); //第二个图层
Memory_8bpp_Mode();
DMA_24bit(1,0,0,0,50,240,50,0);
/*设置S0图层*/
BTE_S0_Color_8bpp(); //[92h] Source_0 Color Depth
BTE_S0_Memory_Start_Address(1024*600*3);
BTE_S0_Image_Width(1024);
BTE_S0_Window_Start_XY(0,0);
**
/设置显示图层，可设为16bpp或24bpp/
BTE_Destination_Color_24bpp(); //[92h] Destination Color Depth
BTE_Destination_Memory_Start_Address(0);
BTE_Destination_Image_Width(1024);
BTE_Destination_Window_Start_XY(0,0);
Canvas_Image_Start_address(0);
Memory_24bpp_Mode();
Foreground_color_16M(0xff0000);
Background_color_16M(0x00ff00);
BTE_Window_Size(400,240);
BTE_Operation_Code(0xE);
BTE_ROP_Code(7);
/*开启BTE功能*/
BTE_Enable();
Check_BTE_Busy();2、改变前景色透明背景色
**
/设定第二个图层作为DMA图层，只能设置为8bpp或者16bpp模式/
Canvas_Image_Start_address(1024*600*3); //第二个图层
Memory_8bpp_Mode();
DMA_24bit(1,0,0,0,50,240,50,0);
**
/设置S0图层/
BTE_S0_Color_8bpp(); //[92h] Source_0 Color Depth
BTE_S0_Memory_Start_Address(1024*600*3);
BTE_S0_Image_Width(1024);
BTE_S0_Window_Start_XY(0,0);
/*设置显示图层，可设为16bpp或24bpp*/
BTE_Destination_Color_24bpp(); //[92h] Destination Color Depth
BTE_Destination_Memory_Start_Address(0);
BTE_Destination_Image_Width(1024);
BTE_Destination_Window_Start_XY(0,0);
Canvas_Image_Start_address(0);
Memory_24bpp_Mode();
Foreground_color_16M(0xff0000);
BTE_Window_Size(400,240);
BTE_Operation_Code(0xF); //Chroma_key 透明背景色
BTE_ROP_Code(7);
/*开启BTE功能*/
BTE_Enable();
Check_BTE_Busy();效果展示
应用
用户可以借此功能，将常用的数字、符号、字母等预先设计好多套尺寸并保存到FLASH中备用，就相当于矢量字库了！后续调用起来就相当方便。
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