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如果IO口全部复用到AF14，往显存里填满1，显示的不是白色而是蓝绿色，经排查PB1（接液晶屏R6）引脚一直为0，按照f429discovery的例程里把PB1复用到AF9上，然后显示就正常了，那么第一个问题来了，数据手册上Pin0~7的AF9和AF14上都有LTDC，为啥PB1复用到AF14上颜色显示就不正常呢？ 第二个问题，我用rgb565驱动可以正常显示，用rgb888除了黑色和白色可以正常显示，其他都会花屏，而且屏幕还一直在抖啊抖的。 下面是用rgb888的配置代码 /** * @brief Initializes the LCD. * @param None * @retval None */ void LCD_Init(void) { LTDC_InitTypeDef LTDC_InitStruct; /* Configure the LCD Control pins ------------------------------------------*/ // LCD_CtrlLinesConfig(); // LCD_ChipSelect(DISABLE); // LCD_ChipSelect(ENABLE); /* Configure the LCD_SPI interface -----------------------------------------*/ // LCD_SPIConfig(); /* Power on the LCD --------------------------------------------------------*/ // LCD_PowerOn(); /* Enable the LTDC Clock */ RCC_APB2PeriphClockCmd(RCC_APB2Periph_LTDC, ENABLE); /* Enable the DMA2D Clock */ RCC_AHB1PeriphClockCmd(RCC_AHB1Periph_DMA2D, ENABLE); /* Configure the LCD Control pins */ LCD_AF_GPIOConfig(); LCD_ModeSet(); /* Configure the FMC Parallel interface : SDRAM is used as Frame Buffer for LCD */ SDRAM_Init(); /* LTDC Configuration *********************************************************/ /* Polarity configuration */ /* Initialize the horizontal synchronization polarity as active low */ LTDC_InitStruct.LTDC_HSPolarity = LTDC_HSPolarity_AL; /* Initialize the vertical synchronization polarity as active low */ LTDC_InitStruct.LTDC_VSPolarity = LTDC_VSPolarity_AL; /* Initialize the data enable polarity as active low */ LTDC_InitStruct.LTDC_DEPolarity = LTDC_DEPolarity_AL; /* Initialize the pixel clock polarity as input pixel clock */ LTDC_InitStruct.LTDC_PCPolarity = LTDC_PCPolarity_IPC; /* Configure R,G,B component values for LCD background color */ //0ΪºÚÉ«£¬ffffffΪ°×É« LTDC_InitStruct.LTDC_BackgroundRedValue = 0; LTDC_InitStruct.LTDC_BackgroundGreenValue = 0; LTDC_InitStruct.LTDC_BackgroundBlueValue = 0; /* Configure PLLSAI prescalers for LCD */ /* Enable Pixel Clock */ /* PLLSAI_VCO Input = HSE_VALUE/PLL_M = 1 Mhz */ /* PLLSAI_VCO Output = PLLSAI_VCO Input * PLLSAI_N = 192 Mhz */ /* PLLLCDCLK = PLLSAI_VCO Output/PLLSAI_R = 192/4 = 48 Mhz */ /* LTDC clock frequency = PLLLCDCLK / RCC_PLLSAIDivR = 48/8 = 6 Mhz */ RCC_PLLSAIConfig(192, 7, 3); RCC_LTDCCLKDivConfig(RCC_PLLSAIDivR_Div2);//64/2=32Mhz /* Enable PLLSAI Clock */ RCC_PLLSAICmd(ENABLE); /* Wait for PLLSAI activation */ while(RCC_GetFlagStatus(RCC_FLAG_PLLSAIRDY) == RESET) { } /* Timing configuration */ /* Configure horizontal synchronization width */ LTDC_InitStruct.LTDC_HorizontalSync = 4;//9; /* Configure vertical synchronization height */ LTDC_InitStruct.LTDC_VerticalSync = 2;//1; /* Configure accumulated horizontal back porch */ LTDC_InitStruct.LTDC_AccumulatedHBP = 50;//29; /* Configure accumulated vertical back porch */ LTDC_InitStruct.LTDC_AccumulatedVBP = 25;//3; /* Configure accumulated active width */ LTDC_InitStruct.LTDC_AccumulatedActiveW = 800+50;//269; /* Configure accumulated active height */ LTDC_InitStruct.LTDC_AccumulatedActiveH = 480+25;//323; /* Configure total width */ LTDC_InitStruct.LTDC_TotalWidth = 1056;//279; /* Configure total height */ LTDC_InitStruct.LTDC_TotalHeigh = 525;//327; LTDC_Init(<DC_InitStruct); } /** * @brief Initializes the LCD Layers. * @param None * @retval None */ void LCD_LayerInit(void) { LTDC_Layer_InitTypeDef LTDC_Layer_InitStruct; /* Windowing configuration */ /* In this case all the active display area is used to display a picture then : Horizontal start = horizontal synchronization + Horizontal back porch = 30 Horizontal stop = Horizontal start + window width -1 = 30 + 240 -1 Vertical start = vertical synchronization + vertical back porch = 4 Vertical stop = Vertical start + window height -1 = 4 + 320 -1 */ LTDC_Layer_InitStruct.LTDC_HorizontalStart = 50;//30; LTDC_Layer_InitStruct.LTDC_HorizontalStop = (LCD_PIXEL_WIDTH + 50 - 1); LTDC_Layer_InitStruct.LTDC_VerticalStart = 25;//4; LTDC_Layer_InitStruct.LTDC_VerticalStop = (LCD_PIXEL_HEIGHT + 25 - 1); /* Pixel Format configuration*/ LTDC_Layer_InitStruct.LTDC_PixelFormat = LTDC_Pixelformat_RGB888; /* Alpha constant (255 totally opaque) */ LTDC_Layer_InitStruct.LTDC_ConstantAlpha = 255; /* Default Color configuration (configure A,R,G,B component values) */ LTDC_Layer_InitStruct.LTDC_DefaultColorBlue = 0; LTDC_Layer_InitStruct.LTDC_DefaultColorGreen = 0; LTDC_Layer_InitStruct.LTDC_DefaultColorRed = 0; LTDC_Layer_InitStruct.LTDC_DefaultColorAlpha = 0; /* Configure blending factors */ LTDC_Layer_InitStruct.LTDC_BlendingFactor_1 = LTDC_BlendingFactor1_CA; LTDC_Layer_InitStruct.LTDC_BlendingFactor_2 = LTDC_BlendingFactor2_CA; /* the length of one line of pixels in bytes + 3 then : Line Lenth = Active high width x number of bytes per pixel + 3 Active high width = LCD_PIXEL_WIDTH number of bytes per pixel = 2 (pixel_format : RGB565) */ LTDC_Layer_InitStruct.LTDC_CFBLineLength = ((LCD_PIXEL_WIDTH * 3) + 3); /* the pitch is the increment from the start of one line of pixels to the start of the next line in bytes, then : Pitch = Active high width x number of bytes per pixel */ LTDC_Layer_InitStruct.LTDC_CFBPitch = (LCD_PIXEL_WIDTH * 3); /* Configure the number of lines */ LTDC_Layer_InitStruct.LTDC_CFBLineNumber = LCD_PIXEL_HEIGHT; /* Start Address configuration : the LCD Frame buffer is defined on SDRAM */ LTDC_Layer_InitStruct.LTDC_CFBStartAdress = LCD_FRAME_BUFFER; /* Initialize LTDC layer 1 */ LTDC_LayerInit(LTDC_Layer1, <DC_Layer_InitStruct); /* Configure Layer2 */ /* Start Address configuration : the LCD Frame buffer is defined on SDRAM w/ Offset */ LTDC_Layer_InitStruct.LTDC_CFBStartAdress = LCD_FRAME_BUFFER + BUFFER_OFFSET; /* Configure blending factors */ LTDC_Layer_InitStruct.LTDC_BlendingFactor_1 = LTDC_BlendingFactor1_PAxCA; LTDC_Layer_InitStruct.LTDC_BlendingFactor_2 = LTDC_BlendingFactor2_PAxCA; /* Initialize LTDC layer 2 */ LTDC_LayerInit(LTDC_Layer2, <DC_Layer_InitStruct); /* LTDC configuration reload */ LTDC_ReloadConfig(LTDC_IMReload); /* Enable foreground & background Layers */ LTDC_LayerCmd(LTDC_Layer1, ENABLE); LTDC_LayerCmd(LTDC_Layer2, ENABLE); /* LTDC configuration reload */ LTDC_ReloadConfig(LTDC_IMReload); /* Set default font */ LCD_SetFont(&LCD_DEFAULT_FONT); /* dithering activation */ LTDC_DitherCmd(ENABLE); } |
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没用啊，还是老一样，感觉是复用的问题。。
。。