void TM_LCD9341_InitLTDC(void) {
LTDC_InitTypeDef LTDC_InitStruct;
/* Enable the LTDC Clock */
RCC_APB2PeriphClockCmd(RCC_APB2Periph_LTDC, ENABLE);
/* Enable the DMA2D Clock */
RCC_AHB1PeriphClockCmd(RCC_AHB1Periph_DMA2D, ENABLE);
/* 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 */
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 = 96 Mhz */
/* LTDC clock frequency = PLLLCDCLK / RCC_PLLSAIDivR = 96/4 = 24 Mhz */
RCC_PLLSAIConfig(192, 7, 4);
RCC_LTDCCLKDivConfig(RCC_PLLSAIDivR_Div4);
/* 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 = 9;
/* Configure vertical synchronization height */
LTDC_InitStruct.LTDC_VerticalSync = 1;
/* Configure accumulated horizontal back porch */
LTDC_InitStruct.LTDC_AccumulatedHBP = 29;
/* Configure accumulated vertical back porch */
LTDC_InitStruct.LTDC_AccumulatedVBP = 3;
/* Configure accumulated active width */
LTDC_InitStruct.LTDC_AccumulatedActiveW = 269;
/* Configure accumulated active height */
LTDC_InitStruct.LTDC_AccumulatedActiveH = 323;
/* Configure total width */
LTDC_InitStruct.LTDC_TotalWidth = 279;
/* Configure total height */
LTDC_InitStruct.LTDC_TotalHeigh = 327;
LTDC_Init(<DC_InitStruct);
}
/*
* initialize LTCD peripheral
*/
static void lcd_init_ltcd (void)
{
LTDC_InitTypeDef LTDC_InitStruct;
NVIC_InitTypeDef NVIC_InitStructure;
// Clock enable
RCC_APB2PeriphClockCmd (RCC_APB2Periph_LTDC, ENABLE);
RCC_AHB1PeriphClockCmd (RCC_AHB1Periph_DMA2D, ENABLE);
lcd_init_af ();
// set PLLSAI to 6 MHz
RCC_PLLSAIConfig (192, 7, 4);
RCC_LTDCCLKDivConfig (RCC_PLLSAIDivR_Div8);
RCC_PLLSAICmd (ENABLE);
while (RCC_GetFlagStatus (RCC_FLAG_PLLSAIRDY) == RESET);
/* configure timer
*
* BP = back porch, FP = front porch
*
* HSync = 10 VSync = 2
* HBP = 20 VBP = 2
* HFP = 10 VFP = 4
*
* portrait mode: W = 240, H = 320
*/
LTDC_StructInit (<DC_InitStruct);
LTDC_InitStruct.LTDC_HorizontalSync = 9; // HSync - 1
LTDC_InitStruct.LTDC_VerticalSync = 1; // VSync - 1
LTDC_InitStruct.LTDC_AccumulatedHBP = 29; // HSync + HBP - 1
LTDC_InitStruct.LTDC_AccumulatedVBP = 3; // VSync + VBP - 1
LTDC_InitStruct.LTDC_AccumulatedActiveW = 269; // HSync + HBP + W - 1
LTDC_InitStruct.LTDC_AccumulatedActiveH = 323; // VSync + VBP + H - 1
LTDC_InitStruct.LTDC_TotalWidth = 279; // HSync + HBP + W + HFP - 1
LTDC_InitStruct.LTDC_TotalHeigh = 327; // VSync + VBP + H + VFP - 1
LTDC_InitStruct.LTDC_HSPolarity = LTDC_HSPolarity_AL;
LTDC_InitStruct.LTDC_VSPolarity = LTDC_VSPolarity_AL;
LTDC_InitStruct.LTDC_DEPolarity = LTDC_DEPolarity_AL;
LTDC_InitStruct.LTDC_PCPolarity = LTDC_PCPolarity_IPC;
LTDC_InitStruct.LTDC_BackgroundRedValue = 0;
LTDC_InitStruct.LTDC_BackgroundGreenValue = 0;
LTDC_InitStruct.LTDC_BackgroundBlueValue = 0;
LTDC_Init (<DC_InitStruct);
/* configure interrupts */
NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 6;
NVIC_InitStructure.NVIC_IRQChannelSubPriority = 0;
NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;
NVIC_InitStructure.NVIC_IRQChannel = LTDC_IRQn;
NVIC_Init (&NVIC_InitStructure);
}
/* Private functions */
static void TM_LCD_INT_InitLTDC(void) {
LTDC_InitTypeDef LTDC_InitStruct;
/* Enable LTDC and DMA2D clocks */
RCC->APB2ENR |= RCC_APB2ENR_LTDCEN;
RCC->AHB1ENR |= RCC_AHB1ENR_DMA2DEN;
/* Disable LTDC */
LTDC->GCR &= ~LTDC_GCR_LTDCEN;
/* 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 */
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 = 192/2 = 96 Mhz */
/* LTDC clock frequency = PLLLCDCLK / RCC_PLLSAIDivR = 96/4 = 24 Mhz */
RCC_PLLSAIConfig(192, 7, 2);
RCC_LTDCCLKDivConfig(RCC_PLLSAIDivR_Div4);
/* Enable PLLSAI Clock */
RCC_PLLSAICmd(ENABLE);
/* Wait for PLLSAI activation */
while (RCC_GetFlagStatus(RCC_FLAG_PLLSAIRDY) == RESET);
/* Timing configuration */
LTDC_InitStruct.LTDC_HorizontalSync = 29;
LTDC_InitStruct.LTDC_VerticalSync = 2;
LTDC_InitStruct.LTDC_AccumulatedHBP = 143;
LTDC_InitStruct.LTDC_AccumulatedVBP = 34;
LTDC_InitStruct.LTDC_AccumulatedActiveW = 783;
LTDC_InitStruct.LTDC_AccumulatedActiveH = 514;
LTDC_InitStruct.LTDC_TotalWidth = 799;
LTDC_InitStruct.LTDC_TotalHeigh = 524;
/* Init LTDC peripheral */
LTDC_Init(<DC_InitStruct);
}
/**
* @brief Configure PLLSAI.
* @param None
* @retval None
*/
void PLLSAI_Config(void)
{
/* Configure PLLSAI prescalers */
/* PLLSAI_VCO : VCO_429M */
/* SAI_CLK(first level) = PLLSAI_VCO/PLLSAIQ = 429/2 = 214.5 Mhz */
RCC_PLLSAIConfig(429, 2, 4);
/* SAI_CLK_x = SAI_CLK(first level)/PLLSAIDIVQ = 214.5/19 = 11.289 Mhz */
RCC_SAIPLLSAIClkDivConfig(19);
/* Configure PLLI2S prescalers */
/* PLLI2S_VCO : VCO_344M */
/* SAI_CLK(first level) = PLLI2S_VCO/PLLI2SQ = 344/7 = 49.142 Mhz */
RCC_PLLI2SConfig(344, 7, 4);
/* SAI_CLK_x = SAI_CLK(first level)/PLLI2SDIVQ = 49.142/1 = 49.142 Mhz */
RCC_SAIPLLI2SClkDivConfig(1);
/* Configure Clock source for SAI Block A */
RCC_SAIBlockACLKConfig(RCC_SAIACLKSource_PLLSAI);
/* Configure Clock source for SAI Block B */
RCC_SAIBlockBCLKConfig(RCC_SAIBCLKSource_PLLI2S);
/* Enable PLLSAI Clock */
RCC_PLLSAICmd(ENABLE);
/* Wait till PLLSAI is ready */
while(RCC_GetFlagStatus(RCC_FLAG_PLLSAIRDY) == RESET)
{
}
/* Enable PLLI2S Clock */
RCC_PLLI2SCmd(ENABLE);
/* Wait till PLLI2S is ready */
while(RCC_GetFlagStatus(RCC_FLAG_PLLI2SRDY) == RESET)
{
}
}
/**
* @brief LCD Configuration.
* @note This function Configure tha LTDC peripheral :
* 1) Configure the Pixel Clock for the LCD
* 2) Configure the LTDC Timing and Polarity
* 3) Configure the LTDC Layer 1 :
* - The frame buffer is located at FLASH memory
* - The Layer size configuration : 480x272
* @retval
* None
*/
static void LCD_Config(void)
{
LTDC_InitTypeDef LTDC_InitStruct;
LTDC_Layer_InitTypeDef LTDC_Layer_InitStruct;
/* Enable Pixel Clock --------------------------------------------------------*/
/* Configure PLLSAI prescalers for LCD */
/* 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 = 192/3 = 64 Mhz */
/* LTDC clock frequency = PLLLCDCLK / RCC_PLLSAIDivR = 64/8 = 8 Mhz */
RCC_PLLSAIConfig(192, 7, 3);
RCC_LTDCCLKDivConfig(RCC_PLLSAIDivR_Div8);
/* Enable PLLSAI Clock */
RCC_PLLSAICmd(ENABLE);
/* Wait for PLLSAI activation */
while(RCC_GetFlagStatus(RCC_FLAG_PLLSAIRDY) == RESET)
{
}
/* Enable the LTDC Clock -----------------------------------------------------*/
RCC_APB2PeriphClockCmd(RCC_APB2Periph_LTDC, ENABLE);
/* Configure the LCD Control pins --------------------------------------------*/
LCD_AF_GPIOConfig();
/* LTDC Initialization -------------------------------------------------------*/
/* 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;
/* Timing configuration */
/* Horizontal synchronization width = Hsync - 1 */
LTDC_InitStruct.LTDC_HorizontalSync = 40;
/* Vertical synchronization height = Vsync - 1 */
LTDC_InitStruct.LTDC_VerticalSync = 9;
/* Accumulated horizontal back porch = Hsync + HBP - 1 */
LTDC_InitStruct.LTDC_AccumulatedHBP = 42;
/* Accumulated vertical back porch = Vsync + VBP - 1 */
LTDC_InitStruct.LTDC_AccumulatedVBP = 11;
/* Accumulated active width = Hsync + HBP + Active Width - 1 */
LTDC_InitStruct.LTDC_AccumulatedActiveW = 522;
/* Accumulated active height = Vsync + VBP + Active Heigh - 1 */
LTDC_InitStruct.LTDC_AccumulatedActiveH = 283;
/* Total width = Hsync + HBP + Active Width + HFP - 1 */
LTDC_InitStruct.LTDC_TotalWidth = 524;
/* Total height = Vsync + VBP + Active Heigh + VFP - 1 */
LTDC_InitStruct.LTDC_TotalHeigh = 285;
/* Configure R,G,B component values for LCD background color */
LTDC_InitStruct.LTDC_BackgroundRedValue = 0;
LTDC_InitStruct.LTDC_BackgroundGreenValue = 0;
LTDC_InitStruct.LTDC_BackgroundBlueValue = 0;
/* Initialize LTDC */
LTDC_Init(<DC_InitStruct);
/* LTDC initialization end ---------------------------------------------------*/
/* Layer1 Configuration ------------------------------------------------------*/
/* Windowing configuration */
/* In this case all the active display area is used to display a picture then :
Horizontal start = horizontal synchronization + Horizontal back porch = 43
Vertical start = vertical synchronization + vertical back porch = 12
Horizontal stop = Horizontal start + window width -1 = 43 + 480 -1
Vertical stop = Vertical start + window height -1 = 12 + 272 -1 */
LTDC_Layer_InitStruct.LTDC_HorizontalStart = 43;
LTDC_Layer_InitStruct.LTDC_HorizontalStop = (480 + 43 - 1);
LTDC_Layer_InitStruct.LTDC_VerticalStart = 12;
LTDC_Layer_InitStruct.LTDC_VerticalStop = (272 + 12 - 1);
/* Pixel Format configuration*/
LTDC_Layer_InitStruct.LTDC_PixelFormat = LTDC_Pixelformat_RGB565;
/* 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;
/* Start Address configuration : frame buffer is located at FLASH memory */
LTDC_Layer_InitStruct.LTDC_CFBStartAdress = (uint32_t)&RGB565_480x272;
/* 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 = 480
number of bytes per pixel = 2 (pixel_format : RGB565) */
LTDC_Layer_InitStruct.LTDC_CFBLineLength = ((480 * 2) + 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 = (480 * 2);
/* Configure the number of lines */
LTDC_Layer_InitStruct.LTDC_CFBLineNumber = 272;
/* Initializes the Layer */
LTDC_LayerInit(LTDC_Layer1, <DC_Layer_InitStruct);
/* Layer1 Configuration end --------------------------------------------------*/
}
/**
* @brief LCD Configuration.
* @note This function Configure tha LTDC peripheral :
* 1) Configure the Pixel Clock for the LCD
* 2) Configure the LTDC Timing and Polarity
* 3) Configure the LTDC Layer 1 :
* - indirect color (L8) as pixel format
* - The frame buffer is located at FLASH memory
* - The Layer size configuration : 320x240
* 4) Configure the LTDC Layer 2 :
* - The frame buffer is located at FLASH memory
* - The Layer size configuration : 320x240
* 5) Load 256 colors in CLUT address for Layer 1
* @retval
* None
*/
static void LCD_Config(void)
{
LTDC_InitTypeDef LTDC_InitStruct;
LTDC_Layer_InitTypeDef LTDC_Layer_InitStruct;
LTDC_CLUT_InitTypeDef LTDC_CLUT_InitStruct;
uint32_t uwCounter = 0;
/* Enable Pixel Clock --------------------------------------------------------*/
/* Configure PLLSAI prescalers for LCD */
/* 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 = 192/3 = 64 Mhz */
/* LTDC clock frequency = PLLLCDCLK / RCC_PLLSAIDivR = 64/8 = 8 Mhz */
RCC_PLLSAIConfig(192, 7, 3);
RCC_LTDCCLKDivConfig(RCC_PLLSAIDivR_Div8);
/* Enable PLLSAI Clock */
RCC_PLLSAICmd(ENABLE);
/* Wait for PLLSAI activation */
while(RCC_GetFlagStatus(RCC_FLAG_PLLSAIRDY) == RESET)
{
}
/* Enable the LTDC Clock -----------------------------------------------------*/
RCC_APB2PeriphClockCmd(RCC_APB2Periph_LTDC, ENABLE);
/* Configure the LCD Control pins --------------------------------------------*/
LCD_AF_GPIOConfig();
/* Sets LCD backlight and display On -----------------------------------------*/
GPIO_SetBits(GPIOA, GPIO_Pin_8);
GPIO_SetBits(GPIOC, GPIO_Pin_6);
/* Initialize the LCD --------------------------------------------------------*/
/* 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;
/* Timing configuration */
/* Horizontal synchronization width = Hsync - 1 */
LTDC_InitStruct.LTDC_HorizontalSync = 40;
/* Vertical synchronization height = Vsync - 1 */
LTDC_InitStruct.LTDC_VerticalSync = 9;
/* Accumulated horizontal back porch = Hsync + HBP - 1 */
LTDC_InitStruct.LTDC_AccumulatedHBP = 42;
/* Accumulated vertical back porch = Vsync + VBP - 1 */
LTDC_InitStruct.LTDC_AccumulatedVBP = 11;
/* Accumulated active width = Hsync + HBP + Active Width - 1 */
LTDC_InitStruct.LTDC_AccumulatedActiveW = 522;
/* Accumulated active height = Vsync + VBP + Active Heigh - 1 */
LTDC_InitStruct.LTDC_AccumulatedActiveH = 283;
/* Total width = Hsync + HBP + Active Width + HFP - 1 */
LTDC_InitStruct.LTDC_TotalWidth = 524;
/* Total height = Vsync + VBP + Active Heigh + VFP - 1 */
LTDC_InitStruct.LTDC_TotalHeigh = 285;
/* Configure R,G,B component values for LCD background color */
LTDC_InitStruct.LTDC_BackgroundRedValue = 0;
LTDC_InitStruct.LTDC_BackgroundGreenValue = 0;
LTDC_InitStruct.LTDC_BackgroundBlueValue = 0;
/* Initialize LTDC */
LTDC_Init(<DC_InitStruct);
/* LCD initializing end ------------------------------------------------------*/
/* Layer1 Configuration ------------------------------------------------------*/
/* Windowing configuration */
/* In this case only 320x240 window of the active display area is used
to display a picture then :
Horizontal start = horizontal synchronization + Horizontal back porch = 43
Vertical start = vertical synchronization + vertical back porch = 12
Horizontal stop = Horizontal start + window width -1 = 43 + 320 -1
Vertical stop = Vertical start + window height -1 = 12 + 240 -1 */
LTDC_Layer_InitStruct.LTDC_HorizontalStart = 43;
LTDC_Layer_InitStruct.LTDC_HorizontalStop = (320 + 43 - 1);
LTDC_Layer_InitStruct.LTDC_VerticalStart = 12;
LTDC_Layer_InitStruct.LTDC_VerticalStop = (240 + 12 - 1);
/* Pixel Format configuration : indirect color (L8) */
LTDC_Layer_InitStruct.LTDC_PixelFormat = LTDC_Pixelformat_L8;
/* Alpha constant configuration */
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;
/* Blending Factors */
LTDC_Layer_InitStruct.LTDC_BlendingFactor_1 = LTDC_BlendingFactor1_PAxCA;
LTDC_Layer_InitStruct.LTDC_BlendingFactor_2 = LTDC_BlendingFactor2_PAxCA;
/* Start Address configuration : frame buffer is located at FLASH memory */
LTDC_Layer_InitStruct.LTDC_CFBStartAdress = (uint32_t)&L8_320x240;
/* 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 = 320
number of bytes per pixel = 1 (pixel_format : L8)
*/
LTDC_Layer_InitStruct.LTDC_CFBLineLength = ((320 * 1) + 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 = (320 * 1);
/* Configure the number of lines */
LTDC_Layer_InitStruct.LTDC_CFBLineNumber = 240;
/* Initialize the Layer1 */
LTDC_LayerInit(LTDC_Layer1, <DC_Layer_InitStruct);
/* Layer1 Configuration end --------------------------------------------------*/
/* Layer2 Configuration ------------------------------------------------------*/
/* Windowing configuration */
/* In this case only 320x240 window of the active display area is used
to display a picture then :
Horizontal start = horizontal synchronization + offset_x + Horizontal back porch = 43
Vertical start = vertical synchronization + offset_y + vertical back porch = 12
Horizontal stop = Horizontal start + offset_x + window width -1 = 43 + 320 -1
Vertical stop = Vertical start + offset_y + window height -1 = 12 + 240 -1 */
LTDC_Layer_InitStruct.LTDC_HorizontalStart = 160 + 43;
LTDC_Layer_InitStruct.LTDC_HorizontalStop = (320 + 160 + 43 - 1);
LTDC_Layer_InitStruct.LTDC_VerticalStart = 32 + 12;
LTDC_Layer_InitStruct.LTDC_VerticalStop = (32 + 240 + 12 - 1);
/* Pixel Format configuration */
LTDC_Layer_InitStruct.LTDC_PixelFormat = LTDC_Pixelformat_RGB565;
/* Alpha constant configuration : The constant alpha for layer 2 is decreased
to see the layer 1 in the intersection zone*/
LTDC_Layer_InitStruct.LTDC_ConstantAlpha = 200;
/* 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;
/* blending Factors */
LTDC_Layer_InitStruct.LTDC_BlendingFactor_1 = LTDC_BlendingFactor1_PAxCA;
LTDC_Layer_InitStruct.LTDC_BlendingFactor_2 = LTDC_BlendingFactor2_PAxCA;
/* Configure Input Address : frame buffer is located at FLASH memory */
LTDC_Layer_InitStruct.LTDC_CFBStartAdress = (uint32_t)&RGB565_320x240;
/* 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 = 320
number of bytes per pixel = 2 (pixel_format : RGB565)
*/
LTDC_Layer_InitStruct.LTDC_CFBLineLength = ((320 * 2) + 3);
LTDC_Layer_InitStruct.LTDC_CFBPitch = (320 * 2);
/* 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_CFBLineNumber = 240;
/* Initialize the Layer 2 */
LTDC_LayerInit(LTDC_Layer2, <DC_Layer_InitStruct);
/* Layer2 Configuration end --------------------------------------------------*/
/* CLUT loading --------------------------------------------------------------*/
/* Load 256 colors in CLUT address for Layer 1 */
for(uwCounter = 0; (uwCounter < 256); uwCounter++)
{
LTDC_CLUT_InitStruct.LTDC_CLUTAdress = uwCounter;
LTDC_CLUT_InitStruct.LTDC_BlueValue = (L8_320x240_CLUT[uwCounter] & 0xFF);
LTDC_CLUT_InitStruct.LTDC_GreenValue = (L8_320x240_CLUT[uwCounter] & 0xFF00) >> 8;
LTDC_CLUT_InitStruct.LTDC_RedValue = (L8_320x240_CLUT[uwCounter] & 0xFF0000) >> 16;
LTDC_CLUTInit(LTDC_Layer1, <DC_CLUT_InitStruct);
}
/* CLUT loading end ----------------------------------------------------------*/
}
LCDTFTConf::LCDTFTConf()
{
CurrentFrameBuffer = LCD_FRAME_BUFFER;
CurrentLayer = LCD_BACKGROUND_LAYER;
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();
/* 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 */
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, 4);
RCC_LTDCCLKDivConfig(RCC_PLLSAIDivR_Div8);
/* 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 = 9;
/* Configure vertical synchronization height */
LTDC_InitStruct.LTDC_VerticalSync = 1;
/* Configure accumulated horizontal back porch */
LTDC_InitStruct.LTDC_AccumulatedHBP = 29;
/* Configure accumulated vertical back porch */
LTDC_InitStruct.LTDC_AccumulatedVBP = 3;
/* Configure accumulated active width */
LTDC_InitStruct.LTDC_AccumulatedActiveW = 269;
/* Configure accumulated active height */
LTDC_InitStruct.LTDC_AccumulatedActiveH = 323;
/* Configure total width */
LTDC_InitStruct.LTDC_TotalWidth = 279;
/* Configure total height */
LTDC_InitStruct.LTDC_TotalHeigh = 327;
LTDC_Init(<DC_InitStruct);
LCD_LayerInit();
/* LTDC reload configuration */
LTDC_ReloadConfig(LTDC_IMReload);
/* Enable the LTDC */
LTDC_Cmd(ENABLE);
}
static void LCD_Config(void)
{
LTDC_InitTypeDef LTDC_InitStruct;
LTDC_Layer_InitTypeDef LTDC_Layer_InitStruct;
GPIO_InitTypeDef GPIO_InitStructure;
RCC_AHB1PeriphClockCmd(RCC_AHB1Periph_GPIOD, ENABLE);
/* Configure NCS in Output Push-Pull mode */
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_13;
GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_OUT;
GPIO_InitStructure.GPIO_OType = GPIO_OType_PP;
GPIO_InitStructure.GPIO_PuPd = GPIO_PuPd_NOPULL;
GPIO_Init(GPIOD, &GPIO_InitStructure);
/* 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();
/* Configure the FMC Parallel interface : SDRAM is used as Frame Buffer for LCD */
SDRAM_Init();
/* Enable Pixel Clock --------------------------------------------------------*/
/* Configure PLLSAI prescalers for LCD */
/* 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 = 192/3 = 64 Mhz */
/* LTDC clock frequency = PLLLCDCLK / RCC_PLLSAIDivR = 64/8 = 8 Mhz */
RCC_PLLSAIConfig(192, 7, 3);
RCC_LTDCCLKDivConfig(RCC_PLLSAIDivR_Div8);
/* Enable PLLSAI Clock */
RCC_PLLSAICmd(ENABLE);
/* Wait for PLLSAI activation */
while(RCC_GetFlagStatus(RCC_FLAG_PLLSAIRDY) == RESET)
{
}
/* LTDC Initialization -------------------------------------------------------*/
/* 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;
/* Timing configuration */
/* Configure horizontal synchronization width */
LTDC_InitStruct.LTDC_HorizontalSync = 9;
/* Configure vertical synchronization height */
LTDC_InitStruct.LTDC_VerticalSync = 1;
/* Configure accumulated horizontal back porch */
LTDC_InitStruct.LTDC_AccumulatedHBP = 29;
/* Configure accumulated vertical back porch */
LTDC_InitStruct.LTDC_AccumulatedVBP = 3;
/* Configure accumulated active width */
LTDC_InitStruct.LTDC_AccumulatedActiveW = 269;
/* Configure accumulated active height */
LTDC_InitStruct.LTDC_AccumulatedActiveH = 323;
/* Configure total width */
LTDC_InitStruct.LTDC_TotalWidth = 279;
/* Configure total height */
LTDC_InitStruct.LTDC_TotalHeigh = 327;
LTDC_Init(<DC_InitStruct);
/* Configure R,G,B component values for LCD background color */
LTDC_InitStruct.LTDC_BackgroundRedValue = 0;
LTDC_InitStruct.LTDC_BackgroundGreenValue = 0;
LTDC_InitStruct.LTDC_BackgroundBlueValue = 0;
LTDC_Init(<DC_InitStruct);
/* LTDC initialization end ---------------------------------------------------*/
/* Layer1 Configuration ------------------------------------------------------*/
/* 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 = 30;
LTDC_Layer_InitStruct.LTDC_HorizontalStop = (240 + 30 - 1);
LTDC_Layer_InitStruct.LTDC_VerticalStart = 4;
LTDC_Layer_InitStruct.LTDC_VerticalStop = (320 + 4 - 1);
/* Pixel Format configuration*/
LTDC_Layer_InitStruct.LTDC_PixelFormat = LTDC_Pixelformat_RGB565;
/* Alpha constant (255 totally opaque) */
LTDC_Layer_InitStruct.LTDC_ConstantAlpha = 255;
/* Configure blending factors */
LTDC_Layer_InitStruct.LTDC_BlendingFactor_1 = LTDC_BlendingFactor1_CA;
LTDC_Layer_InitStruct.LTDC_BlendingFactor_2 = LTDC_BlendingFactor2_CA;
/* 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;
/* Input Address configuration */
LTDC_Layer_InitStruct.LTDC_CFBStartAdress = (uint32_t)&RGB565_240x320;
/* 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 = 240
number of bytes per pixel = 2 (pixel_format : RGB565)
*/
LTDC_Layer_InitStruct.LTDC_CFBLineLength = ((240 * 2) + 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 = (240 * 2);
/* configure the number of lines */
LTDC_Layer_InitStruct.LTDC_CFBLineNumber = 320;
LTDC_LayerInit(LTDC_Layer1, <DC_Layer_InitStruct);
LTDC_DitherCmd(ENABLE);
}
/*
******************************************************************************
*函数：void LCD_GPIOInit(void)
*输入：void
*输出：void
*描述：LCD初始化
******************************************************************************
*/
void LCD_Init(void)
{
LTDC_InitTypeDef LTDC_InitStruct;
LTDC_Layer_InitTypeDef LTDC_Layer_InitStruct;
LTDC_Layer_TypeDef LTDC_Layerx;
/* IO口初始化 */
LCD_GPIOInit();
LCD_DisplayOff();
/* 使能LCD时钟 */
RCC_APB2PeriphClockCmd(RCC_APB2Periph_LTDC, ENABLE);
/* 使能DMA失踪*/
RCC_AHB1PeriphClockCmd(RCC_AHB1Periph_DMA2D, ENABLE);
/* 水平同步信号---低电平有效 */
LTDC_InitStruct.LTDC_HSPolarity = LTDC_HSPolarity_AL;
/* 垂直同步信号---低电平有效 */
LTDC_InitStruct.LTDC_VSPolarity = LTDC_VSPolarity_AL;
/* 数据使能信号---低电平有效 */
LTDC_InitStruct.LTDC_DEPolarity = LTDC_DEPolarity_AL;
/* 像素时钟配置--- */
LTDC_InitStruct.LTDC_PCPolarity = LTDC_DEPolarity_AL;
/* LCD背光设置 */
LTDC_InitStruct.LTDC_BackgroundRedValue = 0;
LTDC_InitStruct.LTDC_BackgroundGreenValue = 0;
LTDC_InitStruct.LTDC_BackgroundBlueValue = 0;
/*
****************************************************************************
*PLLSAI_VCO = HSE*PLLSAI_N / PLL_M = 8 * 192 / 8 = 192MHz
*PLLLCDCLK = PLLSAI_VCO / PLLSAI_R = 192 / 3 = 64 Mhz
*LTDC clock frequency = PLLLCDCLK / RCC_PLLSAIDivR = 64 / 8 = 8 Mhz
****************************************************************************
*/
RCC_PLLSAIConfig(192, 7, 3);
RCC_LTDCCLKDivConfig(RCC_PLLSAIDivR_Div4);
/* 使能PLLSAI时钟 */
RCC_PLLSAICmd(ENABLE);
/* 等待PLLSAI时钟 */
while(RCC_GetFlagStatus(RCC_FLAG_PLLSAIRDY) == RESET){}
/* */
LTDC_InitStruct.LTDC_HorizontalSync = 40;
/* */
LTDC_InitStruct.LTDC_VerticalSync = 9;
/* */
LTDC_InitStruct.LTDC_AccumulatedHBP = 42;
/* */
LTDC_InitStruct.LTDC_AccumulatedVBP = 11;
/* */
LTDC_InitStruct.LTDC_AccumulatedActiveW = 522;
/* */
LTDC_InitStruct.LTDC_AccumulatedActiveH = 283;
/* */
LTDC_InitStruct.LTDC_TotalWidth = 524;
/* */
LTDC_InitStruct.LTDC_TotalHeigh = 285;
LTDC_Init(<DC_InitStruct);
LTDC_Layer_InitStruct.LTDC_HorizontalStart = 43;
LTDC_Layer_InitStruct.LTDC_HorizontalStop = (480 + 43 - 1);
LTDC_Layer_InitStruct.LTDC_VarticalStart = 12;
LTDC_Layer_InitStruct.LTDC_VerticalStop = (272 + 12 - 1);
/* Pixel Format configuration*/
LTDC_Layer_InitStruct.LTDC_PixelFormat = LTDC_Pixelformat_RGB565;
/* 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 = ((480 * 2) + 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 = (480 * 2);
/* configure the number of lines */
LTDC_Layer_InitStruct.LTDC_CFBLineNumber = 272;
/* Input Address configuration */
LTDC_Layer_InitStruct.LTDC_CFBStartAdress = LCD_FRAME_BUFFER;
LTDC_LayerInit(LTDC_Layer1, <DC_Layer_InitStruct);
/* Configure Layer2 */
LTDC_Layer_InitStruct.LTDC_CFBStartAdress = LCD_FRAME_BUFFER + BUFFER_OFFSET;
LTDC_Layer_InitStruct.LTDC_BlendingFactor_1 = LTDC_BlendingFactor1_PAxCA;
LTDC_Layer_InitStruct.LTDC_BlendingFactor_2 = LTDC_BlendingFactor2_PAxCA;
LTDC_LayerInit(LTDC_Layer2, <DC_Layer_InitStruct);
LTDC_ReloadConfig(LTDC_IMReload);
/* Enable foreground & background Layers */
LTDC_LayerCmd(LTDC_Layer1, ENABLE);
// LTDC_LayerCmd(LTDC_Layer2, ENABLE);
LTDC_ReloadConfig(LTDC_IMReload);
LCD_DisplayOn();
}
