void JPEG_encode(void)//编码主函数
{
u8 res;
u16 i,j,color;
res=f_mount(0, &fatfs);
while(res)LCD_String(20,20,"SD mount failed!",RED);
res=f_open(&fileW,"0:/DCMI/ph1.jpg",FA_WRITE|FA_CREATE_ALWAYS);//创建并打开
while(res)LCD_String(20,20,"file create failed!",RED);
cinfo=jpeg_create_compress();//创建JPEG压缩文件
cinfo->image_width=240;
cinfo->image_height=320;
cinfo->output=0;//数据输出到NULL;
jpeg_set_default(cinfo);//设置默认参数
jpeg_start_compress(cinfo);//开始压缩,写压缩文件头信息
j=0;
while(cinfo->next_line<cinfo->image_height)
{
for(i=0;i<240;i++)//读取一行
{
LCD_Cursor(i,cinfo->next_line);
if((lcdid&0xff00)==0x9300)color=BGR565toRGB565(LCD_ReadRAM());
else color=LCD_ReadRAM();
cinfo->inbuf[j++]=(u8)((color&0xf800)>>8);
cinfo->inbuf[j++]=(u8)((color&0x07e0)>>3);
cinfo->inbuf[j++]=(u8)((color&0x001f)<<3);
}
cinfo->next_line++;
//当数据填满时压缩并输出数据(填满16行)
if(cinfo->next_line%cinfo->inbuf_height==0)
{
j=0;
jint_process_rows(cinfo);//在这里压缩
memset((void*)(cinfo->inbuf),0,cinfo->inbuf_size);//清空输入缓冲区
}
}
jpeg_finish_compress(cinfo);
f_close(&fileW);
LEDOn(LED4);
while(1);
}
//LCD读点
u16 LCD_GetPoint(u16 x,u16 y)
{
LCD_SetCursor(x,y);
return BGR565toRGB565(LCD_ReadRAM());
}
