本帖最后由 beiqibing 于 2017-8-14 15:28 编辑

代码中的
if((((c[index] & ((0x80 << ((LCD_Currentfonts->Width / 12 ) * 8 ) ) >> counter)) == 0x00) &&(LCD_Currentfonts->Width <= 12))||
        (((c[index] & (0x1 << counter)) == 0x00)&&(LCD_Currentfonts->Width > 12 )))
这段判断代码是怎么判断的    除以12  然后乘以8    又和12比较  里面的12  和8  发别代表什么？？

void LCD_DrawChar(uint16_t Xpos, uint16_t Ypos, const uint16_t *c)
{
  uint32_t index = 0, counter = 0, xpos =0;
  uint32_t  Xaddress = 0;

  xpos = Xpos*LCD_PIXEL_WIDTH*2;
  Xaddress += Ypos;

  for(index = 0; index < LCD_Currentfonts->Height; index++)
  {

    for(counter = 0; counter < LCD_Currentfonts->Width; counter++)
    {

      if((((c[index] & ((0x80 << ((LCD_Currentfonts->Width / 12 ) * 8 ) ) >> counter)) == 0x00) &&(LCD_Currentfonts->Width <= 12))||
        (((c[index] & (0x1 << counter)) == 0x00)&&(LCD_Currentfonts->Width > 12 )))
      {
          /* Write data value to all SDRAM memory */
         *(__IO uint16_t*) (CurrentFrameBuffer + (2*Xaddress) + xpos) = CurrentBackColor;
      }
      else
      {
          /* Write data value to all SDRAM memory */
         *(__IO uint16_t*) (CurrentFrameBuffer + (2*Xaddress) + xpos) = CurrentTextColor;         
      }
      Xaddress++;
    }
      Xaddress += (LCD_PIXEL_WIDTH - LCD_Currentfonts->Width);
  }
}