C++ LCD_CS_HIGH函数代码示例

/**
  * @brief  Read register value.
  * @param  Reg
  * @retval None
  */
uint16_t LCD_IO_ReadData(uint16_t Reg) 
{
  uint32_t readvalue = 0;

  /* Change BaudRate Prescaler 8 for Read */
  /* Mean SPI baudrate is set to 72/8 = 9 MHz */
  heval_Spi.Instance->CR1 &= 0xFFC7;
  heval_Spi.Instance->CR1 |= SPI_BAUDRATEPRESCALER_8;
  
  /* Send Reg value to Read */
  LCD_IO_WriteReg(Reg);

  /* Reset LCD control line(/CS) and Send command */
  LCD_CS_LOW();
  
  /* Send Start Byte */
  SPIx_Write(START_BYTE | LCD_READ_REG);

  /* Read Upper Byte */
  SPIx_Write(0xFF);
  readvalue = SPIx_Read();
  readvalue = readvalue << 8;
  readvalue |= SPIx_Read();
  
  /* Recover Baud Rate initial value */
  heval_Spi.Instance->CR1 &= 0xFFC7;
  heval_Spi.Instance->CR1 |= heval_Spi.Init.BaudRatePrescaler;

  HAL_Delay(10);

  /* Deselect : Chip Select high */
  LCD_CS_HIGH();
  return readvalue;
}

/**
  * @brief  Initialize the LCD
  * @retval None
  */
void LCD_IO_Init(void)
{
  GPIO_InitTypeDef  gpioinitstruct = {0};

  /* LCD_CS_GPIO and LCD_DC_GPIO Periph clock enable */
  LCD_CS_GPIO_CLK_ENABLE();
  LCD_DC_GPIO_CLK_ENABLE();
  
  /* Configure LCD_CS_PIN pin: LCD Card CS pin */
  gpioinitstruct.Pin    = LCD_CS_PIN;
  gpioinitstruct.Mode   = GPIO_MODE_OUTPUT_PP;
  gpioinitstruct.Pull   = GPIO_NOPULL;
  gpioinitstruct.Speed  = GPIO_SPEED_FREQ_VERY_HIGH;
  HAL_GPIO_Init(SD_CS_GPIO_PORT, &gpioinitstruct);
      
  /* Configure LCD_DC_PIN pin: LCD Card DC pin */
  gpioinitstruct.Pin    = LCD_DC_PIN;
  HAL_GPIO_Init(LCD_DC_GPIO_PORT, &gpioinitstruct);

  /* LCD chip select high */
  LCD_CS_HIGH();
  
  /* LCD SPI Config */
  SPIx_Init();
}

void LCDInit(void)
{
    // Initialize SPI Interface
    Initialize_SPI();

    // set pin directions
    LCD_CS_MAKE_OUT();
    LCD_CS_HIGH();
    LCD_DC_MAKE_OUT();
    LCD_RES_MAKE_OUT();

    // Toggle reset pin
    LCD_RES_LOW();
    Delay(1000);
    LCD_RES_HIGH();
    Delay(1000);

    // Send sequence of command
    LCDSend(0x21, SEND_CMD); // LCD Extended Commands.
    LCDSend(0xC8, SEND_CMD); // Set LCD Vop (Contrast). 0xC8
    LCDSend(0x04 | !!(LCD_START_LINE_ADDR & (1u << 6)), SEND_CMD); // Set Temp S6 for start line
    LCDSend(0x40 | (LCD_START_LINE_ADDR & ((1u << 6) - 1)), SEND_CMD); // Set Temp S[5:0] for start line
    //LCDSend( 0x13, SEND_CMD );  // LCD bias mode 1:48.
    LCDSend(0x12, SEND_CMD); // LCD bias mode 1:68.
    LCDSend(0x20, SEND_CMD); // LCD Standard Commands, Horizontal addressing mode.
    //LCDSend( 0x22, SEND_CMD );  // LCD Standard Commands, Vertical addressing mode.
    LCDSend(0x08, SEND_CMD); // LCD blank
    LCDSend(0x0C, SEND_CMD); // LCD in normal mode.

    // Clear and Update
    LCDClear();
    LCDUpdate();
}

/**
* @brief  Write register value.
* @param  pData Pointer on the register value
* @param  Size Size of byte to transmit to the register
* @retval None
*/
void LCD_IO_WriteData(uint8_t *pData, uint32_t Size)
{
  uint32_t counter = 0;
  
  /* Reset LCD control line CS */
  LCD_CS_LOW();
  
  /* Send Start Byte */
  SPIx_Write(START_BYTE | LCD_WRITE_REG);

  for (counter = Size; counter != 0; counter--)
  {
    while(((heval_Spi.Instance->SR) & SPI_FLAG_TXE) != SPI_FLAG_TXE)
    {
    }  
    /* Need to invert bytes for LCD*/
    *((__IO uint8_t*)&heval_Spi.Instance->DR) = *(pData+1);
    
    while(((heval_Spi.Instance->SR) & SPI_FLAG_TXE) != SPI_FLAG_TXE)
    {
    }  
    *((__IO uint8_t*)&heval_Spi.Instance->DR) = *pData;
    counter--;
    pData += 2;
  }
  
  /* Wait until the bus is ready before releasing Chip select */ 
  while(((heval_Spi.Instance->SR) & SPI_FLAG_BSY) != RESET)
  {
  }  
  
  /* Deselect : Chip Select high */
  LCD_CS_HIGH();
}

/**
  * @brief  Read register value.
  * @param  Reg
  * @retval None
  */
uint16_t LCD_IO_ReadData(uint16_t Reg) 
{
  uint32_t readvalue = 0;

  /* Send Reg value to Read */
  LCD_IO_WriteReg(Reg);

  /* Reset LCD control line(/CS) and Send command */
  LCD_CS_LOW();
  
  /* Send Start Byte */
  SPIx_Write(START_BYTE | LCD_READ_REG);

  /* Read Upper Byte */
  SPIx_Write(0xFF);
  readvalue = SPIx_Read();
  readvalue = readvalue << 8;
  readvalue |= SPIx_Read();
  
  HAL_Delay(10);

  /* Deselect : Chip Select high */
  LCD_CS_HIGH();
  return readvalue;
}

/**
  * @brief  Writes register value.
  */
void LCD_IO_WriteData(uint16_t RegValue) 
{
  /* Set WRX to send data */
  LCD_WRX_HIGH();
  
  /* Reset LCD control line(/CS) and Send data */  
  LCD_CS_LOW();
  SPIx_Write(RegValue);
  
  /* Deselect: Chip Select high */
  LCD_CS_HIGH();
}

/**
  * @brief  Writes register address.
  */
void LCD_IO_WriteReg(uint8_t Reg) 
{
  /* Reset WRX to send command */
  LCD_WRX_LOW();
  
  /* Reset LCD control line(/CS) and Send command */
  LCD_CS_LOW();
  SPIx_Write(Reg);
  
  /* Deselect: Chip Select high */
  LCD_CS_HIGH();
}

/**
* @brief  Write register value.
* @param  pData Pointer on the register value
* @param  Size Size of byte to transmit to the register
* @retval None
*/
void LCD_IO_WriteMultipleData(uint8_t *pData, uint32_t Size)
{
  uint32_t counter = 0;
  __IO uint32_t data = 0;
  
  /* Reset LCD control line CS */
  LCD_CS_LOW();
  
  /* Set LCD data/command line DC to High */
  LCD_DC_HIGH();

  if (Size == 1)
  {
    /* Only 1 byte to be sent to LCD - general interface can be used */
    /* Send Data */
    SPIx_Write(*pData);
  }
  else
  {
    /* Several data should be sent in a raw */
    /* Direct SPI accesses for optimization */
    for (counter = Size; counter != 0; counter--)
    {
      while(((hnucleo_Spi.Instance->SR) & SPI_FLAG_TXE) != SPI_FLAG_TXE)
      {
      }
      /* Need to invert bytes for LCD*/
      *((__IO uint8_t*)&hnucleo_Spi.Instance->DR) = *(pData+1);
      
      while(((hnucleo_Spi.Instance->SR) & SPI_FLAG_TXE) != SPI_FLAG_TXE)
      {
      }
      *((__IO uint8_t*)&hnucleo_Spi.Instance->DR) = *pData;
      counter--;
      pData += 2;
    }
    
    /* Wait until the bus is ready before releasing Chip select */ 
    while(((hnucleo_Spi.Instance->SR) & SPI_FLAG_BSY) != RESET)
    {
    }  
  } 

  /* Empty the Rx fifo */
  data = *(&hnucleo_Spi.Instance->DR);
  UNUSED(data);  /* Remove GNU warning */

  /* Deselect : Chip Select high */
  LCD_CS_HIGH();
}

void lcd_write_data(unsigned char data)
{	
    OS_CPU_SR_ALLOC();
    

    OS_ENTER_CRITICAL();
    
    LCD_RS_HIGH();
    LCD_CS_LOW();
    lcd_send_byte(data);
    LCD_CS_HIGH();

    OS_EXIT_CRITICAL();
}

void lcd_write_cmd(unsigned char cmd)
{   
    OS_CPU_SR_ALLOC();
    

    OS_ENTER_CRITICAL();
    
    LCD_RS_LOW();
    LCD_CS_LOW();
    lcd_send_byte(cmd);
    LCD_CS_HIGH();

    OS_EXIT_CRITICAL();
}

/**
  * @brief  Writes command to select the LCD register.
  * @param  LCDReg: Address of the selected register.
  * @retval None
  */
void LCD_IO_WriteReg(uint8_t LCDReg)
{
  /* Reset LCD control line CS */
  LCD_CS_LOW();
  
  /* Set LCD data/command line DC to Low */
  LCD_DC_LOW();
    
  /* Send Command */
  SPIx_Write(LCDReg);
  
  /* Deselect : Chip Select high */
  LCD_CS_HIGH();
}

/**
  * @brief  Writes data to select the LCD register.
  *         This function must be used after st7735_WriteReg() function
  * @param  Data: data to write to the selected register.
  * @retval None
  */
void LCD_IO_WriteData(uint8_t Data)
{
    /* Reset LCD control line CS */
    LCD_CS_LOW();

    /* Set LCD data/command line DC to High */
    LCD_DC_HIGH();

    /* Send Data */
    SPIx_Write(Data);

    /* Deselect : Chip Select high */
    LCD_CS_HIGH();
}

/**
  * @brief  register address.
  * @param  Reg
  * @retval None
  */
void LCD_IO_WriteReg(uint8_t Reg) 
{
  /* Reset LCD control line(/CS) and Send command */
  LCD_CS_LOW();
  
  /* Send Start Byte */
  SPIx_Write(START_BYTE | SET_INDEX);
  
  /* Write 16-bit Reg Index (High Byte is 0) */
  SPIx_Write(0x00);
  SPIx_Write(Reg);
  
  /* Deselect : Chip Select high */
  LCD_CS_HIGH();
}

/**
  * @brief  Write register value.
  * @param  pData Pointer on the register value
  * @param  Size Size of byte to transmit to the register
  * @retval None
  */
void LCD_IO_WriteMultipleData(uint8_t *pData, uint32_t Size)
{
  uint32_t counter = 0;
  __IO uint32_t data = 0;

  /* Reset LCD control line(/CS) and Send data */  
  LCD_CS_LOW();

  /* Send Start Byte */
  SPIx_Write(START_BYTE | LCD_WRITE_REG);

  if (Size == 1)
  {
    /* Only 1 byte to be sent to LCD - general interface can be used */
    /* Send Data */
    SPIx_Write(*pData);
  }
  else
  {
    for (counter = Size; counter != 0; counter--)
    {
      while(((heval_Spi.Instance->SR) & SPI_FLAG_TXE) != SPI_FLAG_TXE)
      {
      }  
      /* Need to invert bytes for LCD*/
      *((__IO uint8_t*)&heval_Spi.Instance->DR) = *(pData+1);
    
      while(((heval_Spi.Instance->SR) & SPI_FLAG_TXE) != SPI_FLAG_TXE)
      {
      }  
      *((__IO uint8_t*)&heval_Spi.Instance->DR) = *pData;
      counter--;
      pData += 2;
    }
    
    /* Wait until the bus is ready before releasing Chip select */ 
    while(((heval_Spi.Instance->SR) & SPI_FLAG_BSY) != RESET)
    {
    }
  }

  /* Empty the Rx fifo */
  data = *(&heval_Spi.Instance->DR);
  UNUSED(data);  /* Remove GNU warning */

  /* Reset LCD control line(/CS) and Send data */  
  LCD_CS_HIGH();
}

void LCDSend(unsigned char data, unsigned char cd)
{
    LCD_CS_LOW();

    if (cd == SEND_CHR)
    {
        LCD_DC_HIGH();
    }
    else
    {
        LCD_DC_LOW();
    }

    // send data over SPI
    SEND_BYTE_SPI();

    LCD_CS_HIGH();
}