// Send a buffer to LCD void LCD_SendBuffer(u8 *pTxBuffer, u8 *pRxBuffer, u8 NumByte) { LCD_ChipSelect(ENABLE); while (NumByte--) /* while there is data to be read */ { *pRxBuffer = LCD_SPISendByte(*pTxBuffer); pTxBuffer++; pRxBuffer++; } LCD_ChipSelect(DISABLE); }
// Send a byte to LCD void LCD_SendByte(u8 DataType, u8 DataToSend) { LCD_ChipSelect(ENABLE); /* Enable access to LCD */ LCD_SPISendByte(DataType); /* Send Synchro/Mode byte */ LCD_SPISendByte((u8)(DataToSend & (u8)0xF0)); /* Send byte high nibble */ LCD_SPISendByte((u8)((u8)(DataToSend << 4) & (u8)0xF0)); /* Send byte low nibble */ LCD_ChipSelect(DISABLE); /* Disable access to LCD */ }
void LCDTFTConf::LCD_WriteData(uint8_t value) { /* Set WRX to send data */ LCD_CtrlLinesWrite(LCD_WRX_GPIO_PORT, LCD_WRX_PIN, Bit_SET); /* Reset LCD control line(/CS) and Send data */ LCD_ChipSelect(DISABLE); SPI_I2S_SendData(LCD_SPI, value); /* Wait until a data is sent(not busy), before config /CS HIGH */ while(SPI_I2S_GetFlagStatus(LCD_SPI, SPI_I2S_FLAG_TXE) == RESET) ; while(SPI_I2S_GetFlagStatus(LCD_SPI, SPI_I2S_FLAG_BSY) != RESET); LCD_ChipSelect(ENABLE); }
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); }