lcd.c

MCS-51的一个Free小型操作系统,在KeilC中下编译工作

/*******************************************************************************
* Function Name  : LCD_SendMasterData
* Description    : Display one byte data to master LCD.
* Input          : - Data: the user expected data to display on master LCD.
* Output         : None
* Return         : None
*******************************************************************************/
void LCD_SendMasterData(u8 Data)
{
  /* Check the master status */
  LCD_CheckMasterStatus();
  /* Configure Data lines as Output */
  LCD_DataLinesConfig(Output);
  /* Start the master send data sequence */
  LCD_CtrlLinesWrite(GPIO9, CtrlPin_E1, Bit_RESET);  /* E1 = 0 */
  LCD_CtrlLinesWrite(GPIO9, CtrlPin_RW, Bit_RESET);  /* RW = 0 */
  LCD_CtrlLinesWrite(GPIO9, CtrlPin_DI, Bit_SET);    /* DI = 1 */
  LCD_CtrlLinesWrite(GPIO9, CtrlPin_E1, Bit_SET);    /* E1 = 1 */
  /* Write data to the master */
  LCD_DataLinesWrite(GPIO8, (u32)Data);
  LCD_CtrlLinesWrite(GPIO9, CtrlPin_E1, Bit_RESET);  /* E1 = 0 */
}

/*******************************************************************************
* Function Name  : LCD_ReadMasterData
* Description    : Read master byte data displayed on master LCD.
* Input          : None
* Output         : None
* Return         : None
*******************************************************************************/
u32 LCD_ReadMasterData(void)
{
  u32 MasterData = 0;

  /* Check the master status */
  LCD_CheckMasterStatus();
  /* Configure Data lines as Input */
  LCD_DataLinesConfig(Input);
  /* Start the master read data sequence */
  LCD_CtrlLinesWrite(GPIO9, CtrlPin_E1, Bit_RESET);  /* E1 = 0 */
  LCD_CtrlLinesWrite(GPIO9, CtrlPin_RW, Bit_SET);    /* RW = 1 */
  LCD_CtrlLinesWrite(GPIO9, CtrlPin_DI, Bit_SET);    /* DI = 1 */
  LCD_CtrlLinesWrite(GPIO9, CtrlPin_E1, Bit_SET);    /* E1 = 1 */
  /* Read data from the master */
  MasterData = (GPIO_Read(GPIO8));
  LCD_CtrlLinesWrite(GPIO9, CtrlPin_E1, Bit_RESET);  /* E1 = 0 */
  /* Read the master returned data */
  return MasterData;
}

/*******************************************************************************
* Function Name  : LCD_SendSlaveData
* Description    : Display one byte data to slave LCD.
* Input          : - Data: the user expected data to display on slave LCD.
* Output         : None
* Return         : None
*******************************************************************************/
void LCD_SendSlaveData(u8 Data)
{
  /* Check the slave status */
  LCD_CheckSlaveStatus();
  /* Configure Data lines as Output */
  LCD_DataLinesConfig(Output);
  /* Start the slave send data sequence */
  LCD_CtrlLinesWrite(GPIO9, CtrlPin_E2, Bit_RESET);  /* E2 = 0 */
  LCD_CtrlLinesWrite(GPIO9, CtrlPin_RW, Bit_RESET);  /* RW = 0 */
  LCD_CtrlLinesWrite(GPIO9, CtrlPin_DI, Bit_SET);    /* DI = 1 */
  LCD_CtrlLinesWrite(GPIO9, CtrlPin_E2, Bit_SET);    /* E2 = 1 */
  /* Write data to the slave */
  LCD_DataLinesWrite(GPIO8, (u32)Data);
  LCD_CtrlLinesWrite(GPIO9, CtrlPin_E2, Bit_RESET);  /* E2 = 0 */
}

/*******************************************************************************
* Function Name  : LCD_ReadSlaveData
* Description    : Read slave byte data displayed on slave LCD.
* Input          : None
* Output         : None
* Return         : None
*******************************************************************************/
u32 LCD_ReadSlaveData(void)
{
  u32 SlaveData = 0;

  /* Check the slave status */
  LCD_CheckSlaveStatus();
  /* Configure Data lines as Input */
  LCD_DataLinesConfig(Input);
  /* Start the slave read data sequence */
  LCD_CtrlLinesWrite(GPIO9, CtrlPin_E2, Bit_RESET);  /* E2 = 0 */
  LCD_CtrlLinesWrite(GPIO9, CtrlPin_RW, Bit_SET);    /* RW = 1 */
  LCD_CtrlLinesWrite(GPIO9, CtrlPin_DI, Bit_SET);    /* DI = 1 */
  LCD_CtrlLinesWrite(GPIO9, CtrlPin_E2, Bit_SET);    /* E2 = 1 */
  /* Read data from the slave */
  SlaveData = GPIO_Read(GPIO8);
  LCD_CtrlLinesWrite(GPIO9, CtrlPin_E2, Bit_RESET);  /* E2 = 0 */
  /* Read the slave returned data */
  return SlaveData;
}

/*******************************************************************************
* Function Name  : LCD_Init
* Description    : Initialize master and slave LCD.
* Input          : None
* Output         : None
* Return         : None
*******************************************************************************/
void LCD_Init(void)
{
  /* Enable GPIO Clock */


  /* Configure control lines signals as output mode */
  LCD_CtrlLinesConfig();	

  /* Master LCD Init */
  LCD_SendMasterCmd(SOFTWARE_RESET);
  LCD_SendMasterCmd(DISPLAY_OFF);
  LCD_SendMasterCmd(DYNAMIC_DRIVE);
  LCD_SendMasterCmd(DUTY_CYCLE);
  LCD_SendMasterCmd(CLOCKWISE_OUTPUT);
  LCD_SendMasterCmd(READ_MODIFY_WRITE_OFF);
  LCD_SendMasterCmd(START_COLUMN);          /* Set master column address to 0 */
  LCD_SendMasterCmd(START_LINE);            /* Set master display start line to 0 */
  LCD_SendMasterCmd(DISPLAY_ON );

  /* Slave LCD Init */
  LCD_SendSlaveCmd(SOFTWARE_RESET);
  LCD_SendSlaveCmd(DISPLAY_OFF);
  LCD_SendSlaveCmd(DYNAMIC_DRIVE);
  LCD_SendSlaveCmd(DUTY_CYCLE);
  LCD_SendSlaveCmd(CLOCKWISE_OUTPUT);
  LCD_SendSlaveCmd(READ_MODIFY_WRITE_OFF);
  LCD_SendSlaveCmd(START_COLUMN );          /* Set slave column address to 0 */
  LCD_SendSlaveCmd(START_LINE);             /* Set slave display start line to 0 */
  LCD_SendSlaveCmd(DISPLAY_ON);

  /* Clear LCD */	
  LCD_Clear();
  /* Set current Page to 0 for Master and Slave LCDs */	
  LCD_SetSlavePage(0);
  LCD_SetMasterPage(0);
}

/*******************************************************************************
* Function Name  : LCD_SetSlavePage
* Description    : Set the display page of slave LCD, the page range is 0 to 3,
*                  make sure the input will not exceed this range ,otherwise it
*                  will reach a undecided result.
* Input          : - Page: specifies the expected display page of slave LCD
* Output         : None
* Return         : None
*******************************************************************************/
void LCD_SetSlavePage(u8 Page)
{
static u8 ucLastPage = 255;

  /* Set Slave page */
  if( Page != ucLastPage )
  {
  	LCD_SendSlaveCmd(0xB8|Page);
	ucLastPage = Page;
  }
}

/*******************************************************************************
* Function Name  : LCD_SetMasterPage
* Description    : Set the display page of master LCD, the page range is 0 to 3,
*                  make sure the input will not exceed this range ,otherwise it
*                  will reach a undecided result.
* Input          : - Page: specifies the expected display page of master LCD
* Output         : None
* Return         : None
*******************************************************************************/
void LCD_SetMasterPage(u8 Page)
{
static u8 ulLastPage = 255;

  /* Set Master page */
  if( Page != ulLastPage )
  {
    LCD_SendMasterCmd(0xB8|Page);
	ulLastPage = Page;
  }
}

/*******************************************************************************
* Function Name  : SetAddress
* Description    : Set the display column of slave LCD. Column range is 0 to 61.
* Input          : - Address: specifies the expected display column of slave LCD
* Output         : None
* Return         : None
*******************************************************************************/
void LCD_SetSlaveColumn(u8 Address)
{
  /* Set Slave column address */
  LCD_SendSlaveCmd(Address&0x7F);
}

/*******************************************************************************
* Function Name  : LCD_SetMasterColumn
* Description    : Set the display column of master LCD. Column range is 0 to 61.
* Input          : - Address: specifies the expected display column of slave LCD
* Output         : None
* Return         : None
*******************************************************************************/
void LCD_SetMasterColumn(u8 Address)
{
  /* Set Master column address */
  LCD_SendMasterCmd(Address&0x7F);
}

/*******************************************************************************
* Function Name  : LCD_SetTextColor
* Description    : Set the text color for LCD.
* Input          : - TextColor: BlackText: character on black, bottom on white.
*                               WhiteText: character on white, bottom on black.
* Output         : None
* Return         : None
*******************************************************************************/
void LCD_SetTextColor(TextColorMode_TypeDef TextColor)
{
  if(TextColor)
  {
    /* Set White Text color */
    TextMode=WhiteText;
  }
  else
  {
    /* Set Black Text color */
    TextMode=BlackText;
  }
}

/*******************************************************************************
* Function Name  : LCD_Clear
* Description    : Clear the Master and Slave LCDs display.
* Input          : None
* Output         : None
* Return         : None
*******************************************************************************/
void LCD_Clear(void)
{
  u8 Page = 0, Column = 0;	

  /* Clear master and slave LCDs page by page */
  for (Page=0; Page<4; Page++)
  {
    /* Set master and slave page by page */
    LCD_SetMasterPage(Page);
    LCD_SetSlavePage(Page);
    /* Set master and slave column address */
    LCD_SetMasterColumn(0);
    LCD_SetSlaveColumn(0);
    /* Send empty data to master and slave column address on the selected page */
    for (Column=0; Column<61; Column++)
    {
      LCD_SendSlaveData(0);
      LCD_SendMasterData(0);
    }
  }
}
	
/*******************************************************************************
* Function Name  : LCD_ClearLine
* Description    : Clear the selected line of the LCD.
* Input          : - Line: the Line to clear.
*                      - Line1 (Page0&1): clear the first line
*                      - Line2 (Page2&3): clear the second line
* Output         : None
* Return         : None
*******************************************************************************/
void LCD_ClearLine(u8 Line)
{
  u8 Page = 0, Column = 0;	

  /* Clear the slected master and slave line */
  for (Page=Line; Page<Line+2; Page++)
  {
    /* Set master and slave page by page */
    LCD_SetMasterPage(Page);
    LCD_SetSlavePage(Page);
    /* Set master and slave column address */
    LCD_SetMasterColumn(0);
    LCD_SetSlaveColumn(0);
    /* Send empty data to master and slave column address on the selected page */
    for (Column=0; Column<61; Column++)
    {
      LCD_SendSlaveData(0);
      LCD_SendMasterData(0);
    }
  }
}

/*******************************************************************************
* Function Name  : LCD_ClearMaster
* Description    : Clear the master LCD.
* Input          : None
* Output         : None
* Return         : None
*******************************************************************************/
void LCD_ClearMaster(void)
{
  u8 Page = 0, Column = 0;
	
  /* Clear all master LCD pages */
  for (Page=0; Page<4; Page++)
  {
    /* Set master page by page */
    LCD_SetMasterPage(Page);
    /* Set master column address */
    LCD_SetMasterColumn(0);
    /* Send empty data to master column address on the selected page */
    for (Column=0; Column<61; Column++)
    {
      LCD_SendMasterData(0);
    }
  }
}

/*******************************************************************************
* Function Name  : LCD_ClearSlave
* Description    : Clear the slave LCD.
* Input          : None
* Output         : None
* Return         : None
*******************************************************************************/
void LCD_ClearSlave()
{
  u8 Page = 0, Column = 0;	

  /* Clear all slave LCD pages */
  for (Page=0; Page<4; Page++)
  {
    /* Set slave page by page */
    LCD_SetSlavePage(Page);
    /* Set slave column address */
    LCD_SetSlaveColumn(0);
    /* Send empty data to slave column address on the selected page */
    for (Column=0; Column<61; Column++)
    {
      LCD_SendSlaveData(0);
    }
  }
}

/*******************************************************************************
* Function Name  : LCD_DrawChar
* Description    : Draw a character in LCD.
*                  Note:
*                  the LCD can only display two line character,so page 0 and 1
*                  is to display the first line, page2 and page 3 is to display
*                  the second line.
* Input          : - Line: the Line where to display the character shape .
*                      - Line1 (Page0&1): display character on the first line
*                      - Line2 (Page2&3): display character on the second line