UCGUI触摸屏，鼠标移到的地方会有拖影

292302877 · 发表于 2012-10-11 20:36:09

本帖最后由 292302877 于 2012-10-11 21:22 编辑

刚开始搞 UCGUI ，问题见图片，箭头移动过的地方会在屏上留下拖影，不知道有没有遇到过这个问题的朋友？

不知道是不是读屏的颜色函数有问题，还是其它地方的问题，读屏函数

unsigned int LCD_L0_GetPixelIndex(int x, int y)
{
  return TFT_GetPoint(x,y);
}

u16 TFT_GetPoint(u16 x,u16 y)
{
  TFT_SetCursor(x,y);
  #ifdef DeviceCode_7783
return (LCD_ReadRAM());
  #else
return (TFT_BGR2RGB(LCD_ReadRAM()));
#endif
}

/****************************************************************************
* 名称：u16 TFT_BGR2RGB(u16 c)
* 功能：RRRRRGGGGGGBBBBB 改为 BBBBBGGGGGGRRRRR 格式
* 入口参数：c    BRG 颜色值
* 出口参数：RGB 颜色值
* 说明：内部函数调用
* 调用方法：
****************************************************************************/
u16 TFT_BGR2RGB(u16 c)
{
  u16  r, g, b, rgb;

  b = (c>>0)  & 0x1f;
  g = (c>>5)  & 0x3f;
  r = (c>>11) & 0x1f;

  rgb =  (b<<11) + (g<<5) + (r<<0);

  return( rgb );
}

/*******************************************************************************
* Function Name  : LCD_ReadRAM
* Description : Reads the LCD RAM.
* Input       : None
* Output       : None
* Return       : LCD RAM Value.
*******************************************************************************/
__inline u16 LCD_ReadRAM(void)
{
  vu16 dummy;
  /* Write 16-bit Index (then Read Reg) */
  LCD->LCD_REG = R34; /* Select GRAM Reg */
  /* Read 16-bit Reg */
  dummy = LCD->LCD_RAM;
  return LCD->LCD_RAM;
}

292302877 · 发表于 2012-10-11 21:19:51

怎么没有人顶啊，自己顶一个

292302877 · 发表于 2012-10-13 01:02:49

终于找到问题了，是FSMC 时序设置太快了。
// FSMC_NORSRAMTimingInitTypeDef  p;

FSMC_NORSRAMTimingInitTypeDef  Timing_read, Timing_write;

/*-- FSMC Configuration ------------------------------------------------------*/
/*----------------------- SRAM Bank 4 ----------------------------------------*/
  /* FSMC_Bank1_NORSRAM4 configuration */
//  p.FSMC_AddressSetupTime = 0;
//  p.FSMC_AddressHoldTime = 0;
//  p.FSMC_DataSetupTime = 2;//1
//  p.FSMC_BusTurnAroundDuration = 0;
//  p.FSMC_CLKDivision = 0;
//  p.FSMC_DataLatency = 0;
//  p.FSMC_AccessMode = FSMC_AccessMode_A;

  Timing_read.FSMC_AddressSetupTime = 5;
  Timing_read.FSMC_DataSetupTime = 5;
  Timing_read.FSMC_AccessMode = FSMC_AccessMode_A;

  Timing_write.FSMC_AddressSetupTime = 1;
  Timing_write.FSMC_DataSetupTime = 2;
  Timing_write.FSMC_AccessMode = FSMC_AccessMode_A;

  /* Color LCD configuration ------------------------------------
   LCD configured as follow:
      - Data/Address MUX = Disable
      - Memory Type = SRAM
      - Data Width = 16bit
      - Write Operation = Enable
      - Extended Mode = Enable
      - Asynchronous Wait = Disable */
  FSMC_NORSRAMInitStructure.FSMC_Bank = FSMC_Bank1_NORSRAM4;
  FSMC_NORSRAMInitStructure.FSMC_DataAddressMux = FSMC_DataAddressMux_Disable;
  FSMC_NORSRAMInitStructure.FSMC_MemoryType = FSMC_MemoryType_SRAM;
  FSMC_NORSRAMInitStructure.FSMC_MemoryDataWidth = FSMC_MemoryDataWidth_16b;
  FSMC_NORSRAMInitStructure.FSMC_BurstAccessMode = FSMC_BurstAccessMode_Disable;
  FSMC_NORSRAMInitStructure.FSMC_WaitSignalPolarity = FSMC_WaitSignalPolarity_Low;
  FSMC_NORSRAMInitStructure.FSMC_WrapMode = FSMC_WrapMode_Disable;
  FSMC_NORSRAMInitStructure.FSMC_WaitSignalActive = FSMC_WaitSignalActive_BeforeWaitState;
  FSMC_NORSRAMInitStructure.FSMC_WriteOperation = FSMC_WriteOperation_Enable;
  FSMC_NORSRAMInitStructure.FSMC_WaitSignal = FSMC_WaitSignal_Disable;
  FSMC_NORSRAMInitStructure.FSMC_ExtendedMode = FSMC_ExtendedMode_Disable;
  FSMC_NORSRAMInitStructure.FSMC_WriteBurst = FSMC_WriteBurst_Disable;
  FSMC_NORSRAMInitStructure.FSMC_ReadWriteTimingStruct =  &Timing_read; //&p;
  FSMC_NORSRAMInitStructure.FSMC_WriteTimingStruct = &Timing_write;//&p;

  FSMC_NORSRAMInit(&FSMC_NORSRAMInitStructure);
注释掉的为原来的设置，原来读点的函数总是读不正确，现在显示触摸正常

624668529 · 发表于 2013-8-6 10:26:49

我也遇见这个问题了！！！

UCGUI触摸屏，鼠标移到的地方会有拖影

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