EMWIN 开三缓冲切换画面闪砾

tony129 · 发表于 2015-12-8 17:26:20

还是这个问题，这两天时不时忙些别的，但这个也仍然没有解决办法，开三缓冲的情况下两个画面切换虽然没有拉窗现象但是切换的前一秒画面会闪一下接着才出现下一个画面。
三缓冲设置部分的程序如下，大神们来看一下。

//
// Buffers / VScreens
//
#define NUM_BUFFERS  3 // Number of multiple buffers to be used
#define NUM_VSCREENS 1 // Number of virtual screens to be used

void LCD_X_Config(void) {
  int i;

  //
  // At first initialize use of multiple buffers on demand
  //
  #if (NUM_BUFFERS > 1)
    for (i = 0; i < GUI_NUM_LAYERS; i++) {
      GUI_MULTIBUF_ConfigEx(i, NUM_BUFFERS);
    }
  #endif
  //
  // Set display driver and color conversion for 1st layer
  //
  GUI_DEVICE_CreateAndLink(DISPLAY_DRIVER_0, COLOR_CONVERSION_0, 0, 0);
  //
}

int LCD_X_DisplayDriver(unsigned LayerIndex, unsigned Cmd, void * pData) {
  case LCD_X_SHOWBUFFER: {
    //
    // Required if multiple buffers are used. The 'Index' element of p contains the buffer index.
    //
    LCD_X_SHOWBUFFER_INFO * p;

    p = (LCD_X_SHOWBUFFER_INFO *)pData;
    _aPendingBuffer[LayerIndex] = p->Index;
    break;
.
.
}

void LTDC_ISR_Handler(void) {
  U32 Addr;
  int i;

  LTDC->ICR = (U32)LTDC_IER_LIE;
  for (i = 0; i < GUI_NUM_LAYERS; i++) {
    if (_aPendingBuffer >= 0) {
      //
      // Calculate address of buffer to be used  as visible frame buffer
      //
      Addr = _aAddr + _axSize * _aySize * _aPendingBuffer * _aBytesPerPixels;
      //
      // Store address into SFR
      //
      _apLayer->CFBAR &= ~(LTDC_LxCFBAR_CFBADD);
      _apLayer->CFBAR = Addr;
      //
      // Reload configuration
      //
      LTDC_ReloadConfig(LTDC_SRCR_IMR);
//      LTDC_ReloadConfig(LTDC_SRCR_VBR);
      //
      // Tell emWin that buffer is used
      //
      GUI_MULTIBUF_ConfirmEx(i, _aPendingBuffer);
      //
      // Clear pending buffer flag of layer
      //
      _aBufferIndex = _aPendingBuffer;
      _aPendingBuffer = -1;
    }
  }
}