lcd_low.c

ARM_CORTEX-M3应用实例开发详解光盘

/*******************************************************************************
* Function Name  : LCD_WindowModeDisable
* Description    : Disables LCD Window mode.
* Input          : None
* Output         : None
* Return         : None
*******************************************************************************/
void LCD_WindowModeDisable(void)
{
  LCD_SetDisplayWindow(239, 0x13F, 240, 320);
  LCD_WriteReg(R3, 0x1018);    
}




/*******************************************************************************
* Function Name  : LCD_PowerOn
* Description    : Power on the LCD.
* Input          : None
* Output         : None
* Return         : None
*******************************************************************************/
void LCD_PowerOn(void)
{
/* Power On sequence ---------------------------------------------------------*/
  LCD_WriteReg(R16, 0x0000); /* SAP, BT[3:0], AP, DSTB, SLP, STB */
  LCD_WriteReg(R17, 0x0000); /* DC1[2:0], DC0[2:0], VC[2:0] */
  LCD_WriteReg(R18, 0x0000); /* VREG1OUT voltage */
  LCD_WriteReg(R19, 0x0000); /* VDV[4:0] for VCOM amplitude*/
  Delay(20);             /* Dis-charge capacitor power voltage (200ms) */
  LCD_WriteReg(R16, 0x17B0); /* SAP, BT[3:0], AP, DSTB, SLP, STB */
  LCD_WriteReg(R17, 0x0137); /* DC1[2:0], DC0[2:0], VC[2:0] */
  Delay(5);              /* Delay 50 ms */
  LCD_WriteReg(R18, 0x0139); /* VREG1OUT voltage */
  Delay(5);              /* Delay 50 ms */
  LCD_WriteReg(R19, 0x1d00); /* VDV[4:0] for VCOM amplitude */
  LCD_WriteReg(R41, 0x0013); /* VCM[4:0] for VCOMH */
  Delay(5);              /* Delay 50 ms */
  LCD_WriteReg(R7, 0x0173);  /* 262K color and display ON */
}

/*******************************************************************************
* Function Name  : LCD_DisplayOn
* Description    : Enables the Display.
* Input          : None
* Output         : None
* Return         : None
*******************************************************************************/
void LCD_DisplayOn(void)
{
  /* Display On */
  LCD_WriteReg(R7, 0x0173); /* 262K color and display ON */
}

/*******************************************************************************
* Function Name  : LCD_DisplayOff
* Description    : Disables the Display.
* Input          : None
* Output         : None
* Return         : None
*******************************************************************************/
void LCD_DisplayOff(void)
{
  /* Display Off */
  LCD_WriteReg(R7, 0x0); 
}

/*******************************************************************************
* Function Name  : LCD_WriteReg
* Description    : Writes to the selected LCD register.
* Input          : - LCD_Reg: address of the selected register.
*                  - LCD_RegValue: value to write to the selected register.
* Output         : None
* Return         : None
*******************************************************************************/
void LCD_WriteReg(u8 LCD_Reg, u16 LCD_RegValue)
{
  /* Write 16-bit Index, then Write Reg */
  LCD->LCD_REG = LCD_Reg;
  /* Write 16-bit Reg */
  LCD->LCD_RAM = LCD_RegValue;
}

/*******************************************************************************
* Function Name  : LCD_ReadReg
* Description    : Reads the selected LCD Register.
* Input          : None
* Output         : None
* Return         : LCD Register Value.
*******************************************************************************/
u16 LCD_ReadReg(u8 LCD_Reg)
{
  /* Write 16-bit Index (then Read Reg) */
  LCD->LCD_REG = LCD_Reg;
  /* Read 16-bit Reg */
  return (LCD->LCD_RAM);
}

/*******************************************************************************
* Function Name  : LCD_WriteRAM_Prepare
* Description    : Prepare to write to the LCD RAM.
* Input          : None
* Output         : None
* Return         : None
*******************************************************************************/
void LCD_WriteRAM_Prepare(void)
{ 
  LCD->LCD_REG = R34; 
}
/*******************************************************************************
* Function Name  : LCD_WriteRAM
* Description    : Writes to the LCD RAM.
* Input          : - RGB_Code: the pixel color in RGB mode (5-6-5).
* Output         : None
* Return         : None
*******************************************************************************/
void LCD_WriteRAM(u16 RGB_Code)
{
  /* Write 16-bit GRAM Reg */
  LCD->LCD_RAM = RGB_Code;
}

/*******************************************************************************
* Function Name  : LCD_ReadRAM
* Description    : Reads the LCD RAM.
* Input          : None
* Output         : None
* Return         : LCD RAM Value.
*******************************************************************************/
u16 LCD_ReadRAM(void)
{
  /* Write 16-bit Index (then Read Reg) */
  LCD->LCD_REG = R34; /* Select GRAM Reg */
  /* Read 16-bit Reg */
  return LCD->LCD_RAM;
}

/*******************************************************************************
* Function Name  : LCD_CtrlLinesConfig
* Description    : Configures LCD Control lines (FSMC Pins) in alternate function
                   Push-Pull mode.
* Input          : None
* Output         : None
* Return         : None
*******************************************************************************/
static void LCD_CtrlLinesConfig(void)
{
  GPIO_InitTypeDef GPIO_InitStructure;

  /* Enable FSMC, GPIOD, GPIOE, GPIOF, GPIOG and AFIO clocks */
  RCC_AHBPeriphClockCmd(RCC_AHBPeriph_FSMC, ENABLE);

  RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOD | RCC_APB2Periph_GPIOE |
                         RCC_APB2Periph_GPIOF | RCC_APB2Periph_GPIOG, ENABLE);

  /* Set PD.00(D2), PD.01(D3), PD.04(NOE), PD.05(NWE), PD.08(D13), PD.09(D14),
     PD.10(D15), PD.14(D0), PD.15(D1) as alternate 
     function push pull */
  GPIO_InitStructure.GPIO_Pin = GPIO_Pin_0 | GPIO_Pin_1 | GPIO_Pin_4 | GPIO_Pin_5 |
                                GPIO_Pin_8 | GPIO_Pin_9 | GPIO_Pin_10 | GPIO_Pin_14 | 
                                GPIO_Pin_15;
  GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
  GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_PP;
  GPIO_Init(GPIOD, &GPIO_InitStructure);

  /* Set PE.07(D4), PE.08(D5), PE.09(D6), PE.10(D7), PE.11(D8), PE.12(D9), PE.13(D10),
     PE.14(D11), PE.15(D12) as alternate function push pull */
  GPIO_InitStructure.GPIO_Pin = GPIO_Pin_7 | GPIO_Pin_8 | GPIO_Pin_9 | GPIO_Pin_10 | 
                                GPIO_Pin_11 | GPIO_Pin_12 | GPIO_Pin_13 | GPIO_Pin_14 | 
                                GPIO_Pin_15;
  GPIO_Init(GPIOE, &GPIO_InitStructure);

  /* Set PF.00(A0 (RS)) as alternate function push pull */
  GPIO_InitStructure.GPIO_Pin = GPIO_Pin_0;
  GPIO_Init(GPIOF, &GPIO_InitStructure);

  /* Set PG.12(NE4 (LCD/CS)) as alternate function push pull - CE3(LCD /CS) */
  GPIO_InitStructure.GPIO_Pin = GPIO_Pin_12;
  GPIO_Init(GPIOG, &GPIO_InitStructure);
}

/*******************************************************************************
* Function Name  : LCD_FSMCConfig
* Description    : Configures the Parallel interface (FSMC) for LCD(Parallel mode)
* Input          : None
* Output         : None
* Return         : None
*******************************************************************************/
static void LCD_FSMCConfig(void)
{
  FSMC_NORSRAMInitTypeDef  FSMC_NORSRAMInitStructure;
  FSMC_NORSRAMTimingInitTypeDef  p;

/*-- FSMC Configuration ------------------------------------------------------*/
/*----------------------- SRAM Bank 4 ----------------------------------------*/
  /* FSMC_Bank1_NORSRAM4 configuration */
  p.FSMC_AddressSetupTime = 0;
  p.FSMC_AddressHoldTime = 0;
  p.FSMC_DataSetupTime = 2;
  p.FSMC_BusTurnAroundDuration = 0;
  p.FSMC_CLKDivision = 0;
  p.FSMC_DataLatency = 0;
  p.FSMC_AccessMode = FSMC_AccessMode_A;

  /* Color LCD configuration ------------------------------------
     LCD configured as follow:
        - Data/Address MUX = Disable
        - Memory Type = SRAM
        - Data Width = 16bit
        - Write Operation = Enable
        - Extended Mode = Enable
        - Asynchronous Wait = Disable */
  FSMC_NORSRAMInitStructure.FSMC_Bank = FSMC_Bank1_NORSRAM4;
  FSMC_NORSRAMInitStructure.FSMC_DataAddressMux = FSMC_DataAddressMux_Disable;
  FSMC_NORSRAMInitStructure.FSMC_MemoryType = FSMC_MemoryType_SRAM;
  FSMC_NORSRAMInitStructure.FSMC_MemoryDataWidth = FSMC_MemoryDataWidth_16b;
  FSMC_NORSRAMInitStructure.FSMC_BurstAccessMode = FSMC_BurstAccessMode_Disable;
  FSMC_NORSRAMInitStructure.FSMC_WaitSignalPolarity = FSMC_WaitSignalPolarity_Low;
  FSMC_NORSRAMInitStructure.FSMC_WrapMode = FSMC_WrapMode_Disable;
  FSMC_NORSRAMInitStructure.FSMC_WaitSignalActive = FSMC_WaitSignalActive_BeforeWaitState;
  FSMC_NORSRAMInitStructure.FSMC_WriteOperation = FSMC_WriteOperation_Enable;
  FSMC_NORSRAMInitStructure.FSMC_WaitSignal = FSMC_WaitSignal_Disable;
  FSMC_NORSRAMInitStructure.FSMC_ExtendedMode = FSMC_ExtendedMode_Disable;
//  FSMC_NORSRAMInitStructure.FSMC_AsyncWait = FSMC_AsyncWait_Disable;
  FSMC_NORSRAMInitStructure.FSMC_WriteBurst = FSMC_WriteBurst_Disable;
  FSMC_NORSRAMInitStructure.FSMC_ReadWriteTimingStruct = &p;
  FSMC_NORSRAMInitStructure.FSMC_WriteTimingStruct = &p;

  FSMC_NORSRAMInit(&FSMC_NORSRAMInitStructure);  

  /* BANK 4 (of NOR/SRAM Bank 1~4) is enabled */
  FSMC_NORSRAMCmd(FSMC_Bank1_NORSRAM4, ENABLE);
}

/******************  for ucgui use ************************/
unsigned int LCD_ReadP(int x, int y)
{
    LCD_SetCursor(x,y);
    LCD_ReadRAM();
    return LCD_ReadRAM();

}
void LCD_WriteP(int x, int y, int c)
{
    LCD_SetCursor(x, y);
    LCD_WriteRAM_Prepare(); 
    LCD_WriteRAM(c);
}

/******************* (C) COPYRIGHT 2008 STMicroelectronics *****END OF FILE****/