lcd.c

FreeRTOS - V5.1.1 Last Update: Nov 20 2008 http://sourceforge.net/projects/freertos/

   LCD_CtrlLinesWrite( GPIOx_CTRL_LCD, CtrlPin_RD, Bit_SET );       /* RD = 1 */
   LCD_CtrlLinesWrite( GPIOx_CTRL_LCD, CtrlPin_RD, Bit_RESET );     /* RD = 0 */

   ID3 = GPIO_ReadInputData( GPIOx_D_LCD );

   LCD_DataLinesConfig( Output );
   }

/*******************************************************************************
*
*                                LCD_DrawChar
*
*******************************************************************************/
/**
*  Draw a character on the LCD screen.
*
*  @param[in]  x           The line where to display the character shape.
*  @param[in]  y           The column start address.
*  @param[in]  width       The number of columns (dots) in a character width.
*  @param[in]  bmp         The character (monochrome) bitmap. A pointer of the dot matrix data.
*  @param[in]  textColor   The character color.
*  @param[in]  bGndColor   The character background color.
*  @param[in]  charMagniCoeff The character magnifying coefficient.
*
*  @warning    The (0x0) point in on the low left corner.
*
**/
/******************************************************************************/
static void LCD_DrawChar( u8 x, u8 y, u8 width, const u8* bmp, u16 textColor, u16 bGndColor, u16 charMagniCoeff )
   {
   int i;
   int j;
   int k1;
   int k2;

   // Select the area for LCD output.
   LCD_SetRect_For_Cmd( x, y, 7 * charMagniCoeff, 14 * charMagniCoeff );

   // Select LCD output mode.
   LCD_SendLCDCmd( ST7637_RAMWR );

   for( i = 0; i < 7; i++ )
      {
      for( k1 = 0; k1 < charMagniCoeff; k1++ )
         {
         for( j = 0x80; j; j >>= 1 ) // 8
            {
            for( k2 = 0; k2 < charMagniCoeff; k2++ )
               {
               LCD_SendLCDData( ( bmp[2*i] & j ) ? ( textColor & 255 ) : ( bGndColor &  255 ) );
               LCD_SendLCDData( ( bmp[2*i] & j ) ? ( textColor >> 8  ) : ( bGndColor >> 8 ) );
               }
            }

         for( j = 0x80; j > 2; j >>= 1 )  // 8
            {
            for( k2 = 0; k2 < charMagniCoeff; k2++ )
               {
               LCD_SendLCDData( ( bmp[2*i+1] & j ) ? ( textColor & 255 ) : ( bGndColor & 255 ) );
               LCD_SendLCDData( ( bmp[2*i+1] & j ) ? ( textColor >> 8  ) : ( bGndColor >> 8 ) );
               }
            }
         }
      }
   }

/*******************************************************************************
*
*                                LCD_DisplayRotate
*
*******************************************************************************/
/**
*  Configure the LCD controller for a given orientation.
*
*  @param[in]  H12 The new screen orientation.
*
**/
/******************************************************************************/
static void LCD_DisplayRotate( Rotate_H12_V_Match_TypeDef H12 )
   {
   // Memory Access Control 0x36
   LCD_SendLCDCmd( ST7637_MADCTR );

   switch( H12 )
      {
      case V3  :
         LCD_SendLCDData( V3_MADCTRVAL );
         break;

      case V6  :
         LCD_SendLCDData( V6_MADCTRVAL );
         break;

      case V9  :
         LCD_SendLCDData( V9_MADCTRVAL );
         break;

      case V12 :
      default  :
         LCD_SendLCDData( V12_MADCTRVAL );
         break;
      }
   }

/*******************************************************************************
*
*                                LCD_7637_Controller
*
*******************************************************************************/
/**
*  Initialization of the controller registers.
*
*  @note See ST7637.PDF for more information.
*
**/
/******************************************************************************/
static void LCD_7637_Controller( void )
   {
   extern void starting_delay ( long unsigned  );

   /** Apply hardware reset **/
   LCD_CtrlLinesWrite( GPIOx_CTRL_LCD, CtrlPin_RST, Bit_SET );    /* RST = 1  */
   LCD_CtrlLinesWrite( GPIOx_CTRL_LCD, CtrlPin_RST, Bit_RESET );  /* RST = 0  */
   starting_delay( 0x500 );

   LCD_CtrlLinesWrite( GPIOx_CTRL_LCD, CtrlPin_RST, Bit_SET );    /* RST = 1  */
   starting_delay( 0x500 );

   //default mode is output
   LCD_DataLinesConfig( Output );

   LCD_CheckLCDStatus();

   LCD_SendLCDCmd( ST7637_SWRESET );

   //-----------disable autoread + Manual read once ----------------------------
   LCD_SendLCDCmd( ST7637_AUTOLOADSET );  // Auto Load Set 0xD7
   LCD_SendLCDData( 0xBF );               // Auto Load Disable

   LCD_SendLCDCmd( ST7637_EPCTIN );       // EE Read/write mode 0xE0
   LCD_SendLCDData( 0x00 );               // Set read mode

   LCD_SendLCDCmd( ST7637_EPMRD );        // Read active 0xE3
   LCD_SendLCDCmd( ST7637_EPCTOUT );      // Cancel control 0xE1

   //---------------------------------- Sleep OUT ------------------------------
   LCD_SendLCDCmd( ST7637_DISPOFF );      // display off 0x28
   LCD_SendLCDCmd( ST7637_SLPOUT );       // Sleep Out 0x11

   //--------------------------------Vop setting--------------------------------
   LCD_SendLCDCmd( ST7637_VOPSET );       // Set Vop by initial Module 0xC0
   LCD_SendLCDData( 0xFB );               // Vop = 13.64
   LCD_SendLCDData( 0x00 );               // base on Module

   //----------------------------Set Register-----------------------------------
   LCD_SendLCDCmd( ST7637_BIASSEL );      // Bias select 0xC3
   LCD_SendLCDData( 0x00 );               // 1/12 Bias, base on Module

   LCD_SendLCDCmd( ST7637_BSTBMPXSEL );   // Setting Booster times 0xC4
   LCD_SendLCDData( 0x05 );               // Booster X 8

   LCD_SendLCDCmd( ST7637_BSTEFFSEL );    // Booster eff 0xC5
   LCD_SendLCDData( 0x11 );               // BE = 0x01 (Level 2)

   LCD_SendLCDCmd( ST7637_VGSORCSEL );    // Vg with booster x2 control 0xcb
   LCD_SendLCDData( 0x01 );               // Vg from Vdd2

   LCD_SendLCDCmd( ST7637_ID1SET );       // ID1 = 00 0xcc
   LCD_SendLCDData( 0x00 );               //

   LCD_SendLCDCmd( ST7637_ID3SET );       // ID3 = 00 0xce
   LCD_SendLCDData( 0x00 );               //

   LCD_SendLCDCmd( 0xB7 );                // Glass direction
   LCD_SendLCDData( 0xC0 );               //

   LCD_SendLCDCmd( ST7637_ANASET );       // Analog circuit setting 0xd0
   LCD_SendLCDData( 0x1D );               //

   LCD_SendLCDCmd( 0xB4 );                // PTL mode set
   LCD_SendLCDData( 0x18 );               // power normal mode
   LCD_SendLCDCmd( ST7637_INVOFF );       // Display Inversion OFF 0x20

   LCD_SendLCDCmd( 0x2A );                // column range
   LCD_SendLCDData( 0x04 );               //
   LCD_SendLCDData( 0x83 );               //

   LCD_SendLCDCmd( 0x2B );                // raw range
   LCD_SendLCDData( 0x04 );               //
   LCD_SendLCDData( 0x83 );               //


   LCD_SendLCDCmd( ST7637_COLMOD );       // Color mode = 65k 0x3A
   LCD_SendLCDData( 0x05 );               //

   LCD_SendLCDCmd( ST7637_MADCTR );       // Memory Access Control 0x36
   LCD_SendLCDData( V9_MADCTRVAL );

   LCD_SendLCDCmd( ST7637_DUTYSET );      // Duty = 132 duty 0xb0
   LCD_SendLCDData( 0x7F );

   LCD_SendLCDCmd( 0x29 );                // Display ON
   LCD_SendLCDCmd( 0xF9 );                // Gamma
   LCD_SendLCDData( 0x00 );               //
   LCD_SendLCDData( 0x03 );               //
   LCD_SendLCDData( 0x05 );               //
   LCD_SendLCDData( 0x07 );               //
   LCD_SendLCDData( 0x09 );               //
   LCD_SendLCDData( 0x0B );               //
   LCD_SendLCDData( 0x0D );               //
   LCD_SendLCDData( 0x0F );               //
   LCD_SendLCDData( 0x11 );               //
   LCD_SendLCDData( 0x13 );               //
   LCD_SendLCDData( 0x15 );               //
   LCD_SendLCDData( 0x17 );               //
   LCD_SendLCDData( 0x19 );               //
   LCD_SendLCDData( 0x1B );               //
   LCD_SendLCDData( 0x1D );               //
   LCD_SendLCDData( 0x1F );               //
   }

/*******************************************************************************
*
*                                LCD_BackLightConfig
*
*******************************************************************************/
/**
*  Setting of the PWM that drives the backlight intensity.
*
**/
/******************************************************************************/
static void LCD_BackLightConfig( void )
   {
   GPIO_InitTypeDef GPIO_InitStructure;

   /* Enable GPIOB clock  */
   RCC_APB2PeriphClockCmd( RCC_APB2Periph_GPIOB, ENABLE );

   /* GPIOB Configuration:TIM4 2 in Output */
   GPIO_InitStructure.GPIO_Pin   = GPIO_Pin_7;
   GPIO_InitStructure.GPIO_Mode  = GPIO_Mode_AF_PP;
   GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;

   GPIO_Init( GPIOB, &GPIO_InitStructure );

   /* TIM4 Configuration -----------------------------------------------------*/
   /* TIM4CLK = 12 MHz, Prescaler = 0x0 */

   /* Enable TIM4 clock */
   RCC_APB1PeriphClockCmd( RCC_APB1Periph_TIM4, ENABLE );

   TIM_DeInit( TIM4 );
   TIM_TimeBaseStructInit( &TIM_TimeBaseStructure );
   TIM_OCStructInit( &TIM_OCInitStructure );

   /* Time base configuration */
   TIM_TimeBaseStructure.TIM_Period          = 0xFFFF;
   TIM_TimeBaseStructure.TIM_Prescaler       = 0x0;
   TIM_TimeBaseStructure.TIM_ClockDivision   = 0x0;
   TIM_TimeBaseStructure.TIM_CounterMode     = TIM_CounterMode_Up;

   TIM_TimeBaseInit( TIM4, &TIM_TimeBaseStructure );

   /* Output Compare Toggle Mode configuration: Channel2 */
   TIM_OCInitStructure.TIM_OCMode   = TIM_OCMode_PWM1;
   TIM_OCInitStructure.TIM_Channel  = TIM_Channel_2;
   TIM_OCInitStructure.TIM_Pulse    = Current_CCR_BackLightStart;

   TIM_OCInit( TIM4, &TIM_OCInitStructure );
   TIM_OC4PreloadConfig( TIM4, TIM_OCPreload_Disable );

   TIM_ARRPreloadConfig( TIM4, ENABLE );

   /* Enable TIM4 IT */
   TIM_ITConfig( TIM4, TIM_IT_CC2, ENABLE );

   // Go !!!
   TIM_Cmd( TIM4, ENABLE );
   }

/*******************************************************************************
*
*                                LCD_BackLightChange
*
*******************************************************************************/
/**
*  Modify the PWM rate.
*
**/
/******************************************************************************/
static void LCD_BackLightChange( void )
   {
   /* Output Compare Toggle Mode configuration: Channel2 */
   TIM_OCInitStructure.TIM_Pulse = Current_CCR_BackLightStart;

   TIM_OCInit( TIM4, &TIM_OCInitStructure );
   }