亮哥！ra8875用内部字库，字距怎么设置不了啊？？

sky-Hawk where

亮哥！ra8875用内部字库，字距怎么设置不了啊？？
0x2e这个寄存器我整好久都没搞定啊！！
手册上也没指明怎么设置~
{
Font_with_BackgroundTransparency();
Horizontal_FontEnlarge_x2();
Vertical_FontEnlarge_x2();
Font_size_32x32_16x32();
Font_spacing_set(5);
Text_Background_Color(bcolor);
Text_Foreground_Color(color);
Font_Coordinate(px,y);//×?±ê
Text_Mode();
WriteCommand(0x02);
WriteData(str[i]);
i++;
px += 8;
Graphic_Mode();//??????????????
}
RA8875_WAITSTATUS();