stm3210b_eval_lcd.c

STM32的SPI1与SPI2通信

  while(SPI_I2S_GetFlagStatus(LCD_SPI, SPI_I2S_FLAG_BSY) != RESET)
  {
  }

  LCD_CtrlLinesWrite(LCD_NCS_GPIO_PORT, LCD_NCS_PIN, Bit_SET);
}


/**
  * @brief  Writes to the selected LCD ILI9320 register.
  * @param  LCD_Reg: address of the selected register.
  * @param  LCD_RegValue: value to write to the selected register.
  * @retval None
  */
static void LCD_WriteRegILI9320(uint8_t LCD_Reg, uint16_t LCD_RegValue)
{
  /* Write 16-bit Index (then Write Reg) */
  LCD_WriteRegIndex(LCD_Reg);

  /* Write 16-bit Reg */
  /* Reset LCD control line(/CS) and Send Start-Byte */
  LCD_nCS_StartByte(START_BYTE | LCD_WRITE_REG);

  SPI_I2S_SendData(LCD_SPI, LCD_RegValue>>8);

  while(SPI_I2S_GetFlagStatus(LCD_SPI, SPI_I2S_FLAG_BSY) != RESET)
  {
  }

  SPI_I2S_SendData(LCD_SPI, (LCD_RegValue & 0xFF));

  while(SPI_I2S_GetFlagStatus(LCD_SPI, SPI_I2S_FLAG_BSY) != RESET)
  {
  }

  LCD_CtrlLinesWrite(LCD_NCS_GPIO_PORT, LCD_NCS_PIN, Bit_SET);
}


/**
  * @brief  Reads the selected LCD Register.
  * @param  LCD_Reg: address of the selected register.
  * @retval LCD Register Value.
  */
uint16_t LCD_ReadReg(uint8_t LCD_Reg)
{
  uint16_t tmp = 0;
  uint8_t i = 0;
  
  /* LCD_SPI prescaler: 4 */
  LCD_SPI->CR1 &= 0xFFC7;
  LCD_SPI->CR1 |= 0x0008;
  /* Write 16-bit Index (then Read Reg) */
  LCD_WriteRegIndex(LCD_Reg);
  /* Read 16-bit Reg */
  /* Reset LCD control line(/CS) and Send Start-Byte */
  LCD_nCS_StartByte(START_BYTE | LCD_READ_REG);
  
  for(i = 0; i < 5; i++)
  {
    SPI_I2S_SendData(LCD_SPI, 0xFF);
    while(SPI_I2S_GetFlagStatus(LCD_SPI, SPI_I2S_FLAG_BSY) != RESET)
    {
    }
    /* One byte of invalid dummy data read after the start byte */
    while(SPI_I2S_GetFlagStatus(LCD_SPI, SPI_I2S_FLAG_RXNE) == RESET)
    {    
    }
    SPI_I2S_ReceiveData(LCD_SPI); 
  }

  SPI_I2S_SendData(LCD_SPI, 0xFF);

  /* Read upper byte */
  while(SPI_I2S_GetFlagStatus(LCD_SPI, SPI_I2S_FLAG_BSY) != RESET)
  {
  }

  /* Read lower byte */
  while(SPI_I2S_GetFlagStatus(LCD_SPI, SPI_I2S_FLAG_RXNE) == RESET)
  {
  }
  tmp = SPI_I2S_ReceiveData(LCD_SPI);
  
  
  SPI_I2S_SendData(LCD_SPI, 0xFF);
  while(SPI_I2S_GetFlagStatus(LCD_SPI, SPI_I2S_FLAG_BSY) != RESET)
  {
  }

  /* Read lower byte */
  while(SPI_I2S_GetFlagStatus(LCD_SPI, SPI_I2S_FLAG_RXNE) == RESET)
  {
  }

  tmp = ((tmp & 0xFF) << 8) | SPI_I2S_ReceiveData(LCD_SPI);
  LCD_CtrlLinesWrite(LCD_NCS_GPIO_PORT, LCD_NCS_PIN, Bit_SET);

  /* LCD_SPI prescaler: 2 */
  LCD_SPI->CR1 &= 0xFFC7;

  return tmp;
}


/**
  * @brief  Prepare to write to the LCD RAM.
  * @param  None
  * @retval None
  */
void LCD_WriteRAM_Prepare(void)
{
  LCD_WriteRegIndex(LCD_REG_34); /* Select GRAM Reg */

  /* Reset LCD control line(/CS) and Send Start-Byte */
  LCD_nCS_StartByte(START_BYTE | LCD_WRITE_REG);
}


/**
  * @brief  Writes 1 word to the LCD RAM.
  * @param  RGB_Code: the pixel color in RGB mode (5-6-5).
  * @retval None
  */
void LCD_WriteRAMWord(uint16_t RGB_Code)
{

  LCD_WriteRAM_Prepare();

  LCD_WriteRAM(RGB_Code);

  LCD_CtrlLinesWrite(LCD_NCS_GPIO_PORT, LCD_NCS_PIN, Bit_SET);
}


/**
  * @brief  Writes to the selected LCD HX8312 register.
  * @param  LCD_Reg: address of the selected register.
  * @param  LCD_RegValue: value to write to the selected register.
  * @retval None
  */
static void LCD_WriteRegHX8312(uint8_t LCD_Reg, uint8_t LCD_RegValue)
{
  uint16_t tmp = 0;
  
  LCD_CtrlLinesWrite(LCD_NWR_GPIO_PORT, LCD_NWR_PIN, Bit_RESET);
  LCD_CtrlLinesWrite(LCD_RS_GPIO_PORT, LCD_RS_PIN, Bit_RESET);
  LCD_CtrlLinesWrite(LCD_NCS_GPIO_PORT, LCD_NCS_PIN, Bit_RESET);
  
  tmp = LCD_Reg << 8;
  tmp |= LCD_RegValue;
   
  SPI_I2S_SendData(LCD_SPI, tmp);

  while(SPI_I2S_GetFlagStatus(LCD_SPI, SPI_I2S_FLAG_BSY) != RESET)
  {
  }
  
  LCD_CtrlLinesWrite(LCD_NCS_GPIO_PORT, LCD_NCS_PIN, Bit_SET);
}


/**
  * @brief  Writes to the selected LCD register.
  * @param  LCD_Reg: address of the selected register.
  * @param  LCD_RegValue: value to write to the selected register.
  * @retval None
  */
void LCD_WriteReg(uint8_t LCD_Reg, uint16_t LCD_RegValue)
{
  if((LCDType == LCD_ILI9320) || (LCDType == LCD_SPFD5408))
  {
    LCD_WriteRegILI9320(LCD_Reg, LCD_RegValue);
  }
  else if(LCDType == LCD_HX8312)
  {
    LCD_WriteRegHX8312(LCD_Reg, ((uint8_t)LCD_RegValue));
  }
}


/**
  * @brief  Writes to the LCD RAM.
  * @param  RGB_Code: the pixel color in RGB mode (5-6-5).
  * @retval None
  */
void LCD_WriteRAM(uint16_t RGB_Code)
{
  if((LCDType == LCD_ILI9320) || (LCDType == LCD_SPFD5408))
  {
    SPI_I2S_SendData(LCD_SPI, RGB_Code >> 8);
    while(SPI_I2S_GetFlagStatus(LCD_SPI, SPI_I2S_FLAG_BSY) != RESET)
    {
    }
    SPI_I2S_SendData(LCD_SPI, RGB_Code & 0xFF);
    while(SPI_I2S_GetFlagStatus(LCD_SPI, SPI_I2S_FLAG_BSY) != RESET)
    {
    }
  }

  if(LCDType == LCD_HX8312)
  {
    LCD_CtrlLinesWrite(LCD_NWR_GPIO_PORT, LCD_NWR_PIN, Bit_RESET);
    LCD_CtrlLinesWrite(LCD_RS_GPIO_PORT, LCD_RS_PIN, Bit_SET);
    LCD_CtrlLinesWrite(LCD_NCS_GPIO_PORT, LCD_NCS_PIN, Bit_RESET);
    SPI_I2S_SendData(LCD_SPI, RGB_Code);

    while(SPI_I2S_GetFlagStatus(LCD_SPI, SPI_I2S_FLAG_BSY) != RESET)
    {
    }
  
    LCD_CtrlLinesWrite(LCD_NCS_GPIO_PORT, LCD_NCS_PIN, Bit_SET);
  }
}


/**
  * @brief  Power on the LCD.
  * @param  None
  * @retval None
  */
void LCD_PowerOn(void)
{
  if((LCDType == LCD_ILI9320) || (LCDType == LCD_SPFD5408))
  {
    /* Power On sequence ---------------------------------------------------------*/
    LCD_WriteReg(LCD_REG_16, 0x0000); /* SAP, BT[3:0], AP, DSTB, SLP, STB */
    LCD_WriteReg(LCD_REG_17, 0x0000); /* DC1[2:0], DC0[2:0], VC[2:0] */
    LCD_WriteReg(LCD_REG_18, 0x0000); /* VREG1OUT voltage */
    LCD_WriteReg(LCD_REG_19, 0x0000); /* VDV[4:0] for VCOM amplitude */
    _delay_(20);               /* Dis-charge capacitor power voltage (200ms) */
    LCD_WriteReg(LCD_REG_16, 0x17B0); /* SAP, BT[3:0], AP, DSTB, SLP, STB */
    LCD_WriteReg(LCD_REG_17, 0x0137); /* DC1[2:0], DC0[2:0], VC[2:0] */
    _delay_(5);                /* Delay 50 ms */
    LCD_WriteReg(LCD_REG_18, 0x0139); /* VREG1OUT voltage */
    _delay_(5);                /* delay 50 ms */
    LCD_WriteReg(LCD_REG_19, 0x1d00); /* VDV[4:0] for VCOM amplitude */
    LCD_WriteReg(LCD_REG_41, 0x0013); /* VCM[4:0] for VCOMH */
    _delay_(5);                /* delay 50 ms */
    LCD_WriteReg(LCD_REG_7, 0x0173);  /* 262K color and display ON */
  }
  else if(LCDType == LCD_HX8312)
  {  
    /* Power On Set */
    LCD_WriteReg(LCD_REG_28, 0x73);
    LCD_WriteReg(LCD_REG_36, 0x74);
    LCD_WriteReg(LCD_REG_30, 0x01);
    LCD_WriteReg(LCD_REG_24, 0xC1);
    _delay_(1); /* Delay 10 ms */
    LCD_WriteReg(LCD_REG_24, 0xE1);
    LCD_WriteReg(LCD_REG_24, 0xF1);
    _delay_(6); /* Delay 60 ms */
    LCD_WriteReg(LCD_REG_24, 0xF5);
    _delay_(6); /* Delay 60 ms */
    LCD_WriteReg(LCD_REG_27, 0x09);
    _delay_(1); /* Delay 10 ms */
    LCD_WriteReg(LCD_REG_31, 0x11);
    LCD_WriteReg(LCD_REG_32, 0x0E);
    LCD_WriteReg(LCD_REG_30, 0x81);
    _delay_(1); /* Delay 10 ms */
  }
}


/**
  * @brief  Enables the Display.
  * @param  None
  * @retval None
  */
void LCD_DisplayOn(void)
{
  if((LCDType == LCD_ILI9320) || (LCDType == LCD_SPFD5408))
  {
    /* Display On */
    LCD_WriteReg(LCD_REG_7, 0x0173); /* 262K color and display ON */
  }
  else if(LCDType == LCD_HX8312)
  {  
    LCD_WriteReg(LCD_REG_1, 0x50);
    LCD_WriteReg(LCD_REG_5, 0x04);
    /* Display On */
    LCD_WriteReg(LCD_REG_0, 0x80);
    LCD_WriteReg(LCD_REG_59, 0x01);
    _delay_(4); /* Delay 40 ms */
    LCD_WriteReg(LCD_REG_0, 0x20);
  }  
}


/**
  * @brief  Disables the Display.
  * @param  None
  * @retval None
  */
void LCD_DisplayOff(void)
{
  if((LCDType == LCD_ILI9320) || (LCDType == LCD_SPFD5408))
  {
    /* Display Off */
    LCD_WriteReg(LCD_REG_7, 0x0);
  }
  else if(LCDType == LCD_HX8312)
  { 
    /* Display Off */
    LCD_WriteReg(LCD_REG_0, 0xA0);
    _delay_(4);  /* Delay 40 ms */
    LCD_WriteReg(LCD_REG_59, 0x00);
  } 
}


/**
  * @brief  Configures LCD control lines in Output Push-Pull mode.
  * @param  None
  * @retval None
  */
void LCD_CtrlLinesConfig(void)
{
  GPIO_InitTypeDef GPIO_InitStructure;

  /* Enable GPIO clock */
  RCC_APB2PeriphClockCmd(LCD_NCS_GPIO_CLK | LCD_NWR_GPIO_CLK | LCD_RS_GPIO_CLK, ENABLE);

  /* Configure NCS in Output Push-Pull mode */
  GPIO_InitStructure.GPIO_Pin = LCD_NCS_PIN;
  GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
  GPIO_InitStructure.GPIO_Mode = GPIO_Mode_Out_PP;
  GPIO_Init(LCD_NCS_GPIO_PORT, &GPIO_InitStructure);
  
  /* Configure NWR(RNW), RS in Output Push-Pull mode */
  GPIO_InitStructure.GPIO_Pin = LCD_RS_PIN;
  GPIO_Init(LCD_RS_GPIO_PORT, &GPIO_InitStructure);

  GPIO_InitStructure.GPIO_Pin = LCD_NWR_PIN;
  GPIO_Init(LCD_NWR_GPIO_PORT, &GPIO_InitStructure);
  
  LCD_CtrlLinesWrite(LCD_NWR_GPIO_PORT, LCD_NWR_PIN, Bit_SET);
  LCD_CtrlLinesWrite(LCD_RS_GPIO_PORT, LCD_RS_PIN, Bit_SET);
}


/**
  * @brief  Sets or reset LCD control lines.
  * @param  GPIOx: where x can be B or D to select the GPIO peripheral.
  * @param  CtrlPins: the Control line.
  *   This parameter can be:
  *     @arg LCD_NCS_PIN: Chip Select pin
  *     @arg LCD_NWR_PIN: Read/Write Selection pin
  *     @arg LCD_RS_PIN: Register/RAM Selection pin
  * @param  BitVal: specifies the value to be written to the selected bit.
  *   This parameter can be:
  *     @arg Bit_RESET: to clear the port pin
  *     @arg Bit_SET: to set the port pin
  * @retval None
  */
void LCD_CtrlLinesWrite(GPIO_TypeDef* GPIOx, uint16_t CtrlPins, BitAction BitVal)
{
  /* Set or Reset the control line */
  GPIO_WriteBit(GPIOx, CtrlPins, BitVal);
}

/**
  * @brief  Configures the LCD_SPI interface.
  * @param  None
  * @retval None
  */
void LCD_SPIConfig(void)
{
  SPI_InitTypeDef    SPI_InitStructure;
  GPIO_InitTypeDef   GPIO_InitStructure;

  /* Enable GPIO clock */
  RCC_APB2PeriphClockCmd(LCD_SPI_SCK_GPIO_CLK | LCD_SPI_MISO_GPIO_CLK | LCD_SPI_MOSI_GPIO_CLK, ENABLE);

  /* Enable SPI clock  */
  RCC_APB1PeriphClockCmd(LCD_SPI_CLK, ENABLE);

  /* Configure SPI pins: SCK, MISO and MOSI */
  GPIO_InitStructure.GPIO_Pin = LCD_SPI_SCK_PIN;
  GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
  GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_PP;
  GPIO_Init(LCD_SPI_SCK_GPIO_PORT, &GPIO_InitStructure);

  GPIO_InitStructure.GPIO_Pin = LCD_SPI_MISO_PIN;
  GPIO_Init(LCD_SPI_MISO_GPIO_PORT, &GPIO_InitStructure);
  
  GPIO_InitStructure.GPIO_Pin = LCD_SPI_MOSI_PIN;
  GPIO_Init(LCD_SPI_MOSI_GPIO_PORT, &GPIO_InitStructure);

  SPI_I2S_DeInit(LCD_SPI);
  
  /* SPI Config */
  SPI_InitStructure.SPI_Direction = SPI_Direction_2Lines_FullDuplex;
  SPI_InitStructure.SPI_Mode = SPI_Mode_Master;

  if((LCDType == LCD_ILI9320) || (LCDType == LCD_SPFD5408))
  {
    SPI_InitStructure.SPI_DataSize = SPI_DataSize_8b;
    SPI_InitStructure.SPI_CPOL = SPI_CPOL_High;
    SPI_InitStructure.SPI_CPHA = SPI_CPHA_2Edge;
  }
  else if(LCDType == LCD_HX8312)
  {
    SPI_InitStructure.SPI_DataSize = SPI_DataSize_16b;
    SPI_InitStructure.SPI_CPOL = SPI_CPOL_Low;
    SPI_InitStructure.SPI_CPHA = SPI_CPHA_1Edge;
  }
  SPI_InitStructure.SPI_NSS = SPI_NSS_Soft;
  SPI_InitStructure.SPI_BaudRatePrescaler = SPI_BaudRatePrescaler_2;
  SPI_InitStructure.SPI_FirstBit = SPI_FirstBit_MSB;

  SPI_Init(LCD_SPI, &SPI_InitStructure);

  /* SPI enable */
  SPI_Cmd(LCD_SPI, ENABLE);
}

/**
  * @brief  Displays a pixel.
  * @param  x: pixel x.
  * @param  y: pixel y.  
  * @retval None
  */
static void PutPixel(int16_t x, int16_t y)
{ 
  if(x < 0 || x > 239 || y < 0 || y > 319)
  {
    return;  
  }
  LCD_DrawLine(x, y, 1, LCD_DIR_HORIZONTAL);
}

#ifndef USE_Delay
/**
  * @brief  Inserts a delay time.
  * @param  nCount: specifies the delay time length.
  * @retval None
  */
static void delay(vu32 nCount)
{
  vu32 index = 0; 
  for(index = (100000 * nCount); index != 0; index--)
  {
  }
}
#endif /* USE_Delay*/
/**
  * @}
  */ 

/**
  * @}
  */ 

/**
  * @}
  */ 

/**
  * @}
  */ 
  
/**
  * @}
  */
  
/******************* (C) COPYRIGHT 2011 STMicroelectronics *****END OF FILE****/