www.pudn.com > lpc1768-SD_File.rar > GLCD_SPI_LPC1700.c, change:2010-09-20,size:26973b


/******************************************************************************/ 
/* GLCD_SPI_LPC1700.c: LPC1700 low level Graphic LCD (320x240 pixels) driven  */ 
/*                     with SPI functions                                     */ 
/******************************************************************************/ 
/* This file is part of the uVision/ARM development tools.                    */ 
/* Copyright (c) 2005-2009 Keil Software. All rights reserved.                */ 
/* This software may only be used under the terms of a valid, current,        */ 
/* end user licence from KEIL for a compatible version of KEIL software       */ 
/* development tools. Nothing else gives you the right to use this software.  */ 
/******************************************************************************/ 
 
 
#include <lpc17xx.h> 
#include "GLCD.h" 
#include "Font_24x16.h" 
 
/*********************** Hardware specific configuration **********************/ 
 
/* SPI Interface: SPI3 
    
   PINS:  
   - CS     = P0.6 (GPIO pin) 
   - RS     = GND 
   - WR/SCK = P0.7 (SCK1) 
   - RD     = GND 
   - SDO    = P0.8 (MISO1) 
   - SDI    = P0.9 (MOSI1)                                                    */ 
 
#define PIN_CS      (1 << 6) 
 
/* SPI_SR - bit definitions                                                   */ 
#define TFE         0x01 
#define RNE         0x04 
#define BSY         0x10 
 
/*------------------------- Speed dependant settings -------------------------*/ 
 
/* If processor works on high frequency delay has to be increased, it can be  
   increased by factor 2^N by this constant                                   */ 
#define DELAY_2N    18 
 
/*---------------------- Graphic LCD size definitions ------------------------*/ 
 
#define WIDTH       320                 /* Screen Width (in pixels)           */ 
#define HEIGHT      240                 /* Screen Hight (in pixels)           */ 
#define BPP         16                  /* Bits per pixel                     */ 
#define BYPP        ((BPP+7)/8)         /* Bytes per pixel                    */ 
 
/*--------------- Graphic LCD interface hardware definitions -----------------*/ 
 
/* Pin CS setting to 0 or 1                                                   */ 
#define LCD_CS(x)   ((x) ? (LPC_GPIO0->FIOSET = PIN_CS) : (LPC_GPIO0->FIOCLR = PIN_CS)); 
 
#define SPI_START   (0x70)              /* Start byte for SPI transfer        */ 
#define SPI_RD      (0x01)              /* WR bit 1 within start              */ 
#define SPI_WR      (0x00)              /* WR bit 0 within start              */ 
#define SPI_DATA    (0x02)              /* RS bit 1 within start byte         */ 
#define SPI_INDEX   (0x00)              /* RS bit 0 within start byte         */ 
  
/*---------------------------- Global variables ------------------------------*/ 
 
/******************************************************************************/ 
static volatile unsigned short TextColor = Black, BackColor = White; 
 
 
/************************ Local auxiliary functions ***************************/ 
 
/******************************************************************************* 
* Delay in while loop cycles                                                   * 
*   Parameter:    cnt:    number of while cycles to delay                      * 
*   Return:                                                                    * 
*******************************************************************************/ 
 
static void delay (int cnt) { 
 
  cnt <<= DELAY_2N; 
  while (cnt--); 
} 
 
 
/******************************************************************************* 
* Send 1 byte over serial communication                                        * 
*   Parameter:    byte:   byte to be sent                                      * 
*   Return:               byte read while sending                              * 
*******************************************************************************/ 
 
static __inline unsigned char spi_send (unsigned char byte) { 
 
  LPC_SSP1->DR = byte; 
  while (!(LPC_SSP1->SR & RNE));        /* Wait for send to finish            */ 
  return (LPC_SSP1->DR); 
} 
 
 
/******************************************************************************* 
* Write command to LCD controller                                              * 
*   Parameter:    c:      command to be written                                * 
*   Return:                                                                    * 
*******************************************************************************/ 
 
static __inline void wr_cmd (unsigned char c) { 
 
  LCD_CS(0) 
  spi_send(SPI_START | SPI_WR | SPI_INDEX);   /* Write : RS = 0, RW = 0       */ 
  spi_send(0); 
  spi_send(c); 
  LCD_CS(1) 
} 
 
 
/******************************************************************************* 
* Write data to LCD controller                                                 * 
*   Parameter:    c:      data to be written                                   * 
*   Return:                                                                    * 
*******************************************************************************/ 
 
static __inline void wr_dat (unsigned short c) { 
 
  LCD_CS(0) 
  spi_send(SPI_START | SPI_WR | SPI_DATA);    /* Write : RS = 1, RW = 0       */ 
  spi_send((c >>   8));                       /* Write D8..D15                */ 
  spi_send((c & 0xFF));                       /* Write D0..D7                 */ 
  LCD_CS(1) 
} 
 
 
/******************************************************************************* 
* Start of data writing to LCD controller                                      * 
*   Parameter:                                                                 * 
*   Return:                                                                    * 
*******************************************************************************/ 
 
static __inline void wr_dat_start (void) { 
 
  LCD_CS(0) 
  spi_send(SPI_START | SPI_WR | SPI_DATA);    /* Write : RS = 1, RW = 0       */ 
} 
 
 
/******************************************************************************* 
* Stop of data writing to LCD controller                                       * 
*   Parameter:                                                                 * 
*   Return:                                                                    * 
*******************************************************************************/ 
 
static __inline void wr_dat_stop (void) { 
 
  LCD_CS(1) 
} 
 
 
/******************************************************************************* 
* Data writing to LCD controller                                               * 
*   Parameter:    c:      data to be written                                   * 
*   Return:                                                                    * 
*******************************************************************************/ 
 
static __inline void wr_dat_only (unsigned short c) { 
 
  spi_send((c >>   8));                       /* Write D8..D15                */ 
  spi_send((c & 0xFF));                       /* Write D0..D7                 */ 
} 
 
 
/******************************************************************************* 
* Read data from LCD controller                                                * 
*   Parameter:                                                                 * 
*   Return:               read data                                            * 
*******************************************************************************/ 
 
static __inline unsigned short rd_dat (void) { 
  unsigned short val = 0; 
 
  LCD_CS(0) 
  spi_send(SPI_START | SPI_RD | SPI_DATA);    /* Read: RS = 1, RW = 1         */ 
  spi_send(0);                                /* Dummy read                   */ 
  val   = spi_send(0);                        /* Read D8..D15                 */ 
  val <<= 8; 
  val  |= spi_send(0);                        /* Read D0..D7                  */ 
  LCD_CS(1) 
  return (val); 
} 
 
/******************************************************************************* 
* Write to LCD register                                                        * 
*   Parameter:    reg:    register to be read                                  * 
*                 val:    value to write to register                           * 
*******************************************************************************/ 
 
static __inline void wr_reg (unsigned char reg, unsigned short val) { 
 
  wr_cmd(reg); 
  wr_dat(val); 
} 
 
 
/******************************************************************************* 
* Read from LCD register                                                       * 
*   Parameter:    reg:    register to be read                                  * 
*   Return:               value read from register                             * 
*******************************************************************************/ 
 
static unsigned short rd_reg (unsigned char reg) { 
 
  wr_cmd(reg); 
  return (rd_dat()); 
} 
 
 
/************************ Exported functions **********************************/ 
 
/******************************************************************************* 
* Initialize the Graphic LCD controller                                        * 
*   Parameter:                                                                 * 
*   Return:                                                                    * 
*******************************************************************************/ 
 
void GLCD_Init (void) {  
  static unsigned short driverCode; 
 
  /* Enable clock for SSP1, clock = CCLK / 2                                  */ 
  LPC_SC->PCONP       |= 0x00000400; 
  LPC_SC->PCLKSEL0    |= 0x00200000; 
 
  /* Configure the LCD Control pins                                           */ 
  LPC_PINCON->PINSEL9 &= 0xF0FFFFFF; 
  LPC_GPIO4->FIODIR   |= 0x30000000; 
  LPC_GPIO4->FIOSET    = 0x20000000; 
 
  /* SSEL1 is GPIO output set to high                                         */ 
  LPC_GPIO0->FIODIR   |= 0x00000040; 
  LPC_GPIO0->FIOSET    = 0x00000040; 
  LPC_PINCON->PINSEL0 &= 0xFFF03FFF; 
  LPC_PINCON->PINSEL0 |= 0x000A8000; 
 
  /* Enable SPI in Master Mode, CPOL=1, CPHA=1                                */ 
  /* Max. 25 MBit used for Data Transfer @ 100MHz                              */ 
  LPC_SSP1->CR0        = 0xC7; 
  LPC_SSP1->CPSR       = 0x02; 
  LPC_SSP1->CR1        = 0x02; 
 
  delay(5);                             /* Delay 50 ms                        */ 
  driverCode = rd_reg(0x00); 
 
  /* Start Initial Sequence --------------------------------------------------*/ 
  wr_reg(0x01, 0x0100);                 /* Set SS bit                         */ 
  wr_reg(0x02, 0x0700);                 /* Set 1 line inversion               */ 
  wr_reg(0x04, 0x0000);                 /* Resize register                    */ 
  wr_reg(0x08, 0x0207);                 /* 2 lines front, 7 back porch        */ 
  wr_reg(0x09, 0x0000);                 /* Set non-disp area refresh cyc ISC  */ 
  wr_reg(0x0A, 0x0000);                 /* FMARK function                     */ 
  wr_reg(0x0C, 0x0000);                 /* RGB interface setting              */ 
  wr_reg(0x0D, 0x0000);                 /* Frame marker Position              */ 
  wr_reg(0x0F, 0x0000);                 /* RGB interface polarity             */ 
 
  /* Power On sequence -------------------------------------------------------*/ 
  wr_reg(0x10, 0x0000);                 /* Reset Power Control 1              */ 
  wr_reg(0x11, 0x0000);                 /* Reset Power Control 2              */ 
  wr_reg(0x12, 0x0000);                 /* Reset Power Control 3              */ 
  wr_reg(0x13, 0x0000);                 /* Reset Power Control 4              */ 
  delay(20);                            /* Discharge cap power voltage (200ms)*/ 
  wr_reg(0x10, 0x12B0);                 /* SAP, BT[3:0], AP, DSTB, SLP, STB   */ 
  wr_reg(0x11, 0x0007);                 /* DC1[2:0], DC0[2:0], VC[2:0]        */ 
  delay(5);                             /* Delay 50 ms                        */ 
  wr_reg(0x12, 0x01BD);                 /* VREG1OUT voltage                   */ 
  delay(5);                             /* Delay 50 ms                        */ 
  wr_reg(0x13, 0x1400);                 /* VDV[4:0] for VCOM amplitude        */ 
  wr_reg(0x29, 0x000E);                 /* VCM[4:0] for VCOMH                 */ 
  delay(5);                             /* Delay 50 ms                        */ 
  wr_reg(0x20, 0x0000);                 /* GRAM horizontal Address            */ 
  wr_reg(0x21, 0x0000);                 /* GRAM Vertical Address              */ 
 
  /* Adjust the Gamma Curve --------------------------------------------------*/ 
  if (driverCode == 0x5408) {           /* LCD with touch                     */ 
    wr_reg(0x30, 0x0B0D); 
    wr_reg(0x31, 0x1923); 
    wr_reg(0x32, 0x1C26); 
    wr_reg(0x33, 0x261C); 
    wr_reg(0x34, 0x2419); 
    wr_reg(0x35, 0x0D0B); 
    wr_reg(0x36, 0x1006); 
    wr_reg(0x37, 0x0610); 
    wr_reg(0x38, 0x0706); 
    wr_reg(0x39, 0x0304); 
    wr_reg(0x3A, 0x0E05); 
    wr_reg(0x3B, 0x0E01); 
    wr_reg(0x3C, 0x010E); 
    wr_reg(0x3D, 0x050E); 
    wr_reg(0x3E, 0x0403); 
    wr_reg(0x3F, 0x0607); 
  } 
  if (driverCode == 0xC990) {           /* LCD without touch                  */ 
    wr_reg(0x30, 0x0006); 
    wr_reg(0x31, 0x0101); 
    wr_reg(0x32, 0x0003); 
    wr_reg(0x35, 0x0106); 
    wr_reg(0x36, 0x0B02); 
    wr_reg(0x37, 0x0302); 
    wr_reg(0x38, 0x0707); 
    wr_reg(0x39, 0x0007); 
    wr_reg(0x3C, 0x0600); 
    wr_reg(0x3D, 0x020B); 
  } 
 
 /* Set GRAM area -----------------------------------------------------------*/ 
  wr_reg(0x50, 0x0000);                 /* Horizontal GRAM Start Address      */ 
  wr_reg(0x51, (HEIGHT-1));             /* Horizontal GRAM End   Address      */ 
  wr_reg(0x52, 0x0000);                 /* Vertical   GRAM Start Address      */ 
  wr_reg(0x53, (WIDTH-1));              /* Vertical   GRAM End   Address      */ 
  wr_reg(0x60, 0xA700);                 /* Gate Scan Line                     */ 
  if (driverCode == 0x5408)             /* LCD with touch                     */ 
    wr_reg(0x60, 0xA700);               /* Gate Scan Line                     */ 
  if (driverCode == 0xC990)             /* LCD without touch                  */ 
    wr_reg(0x60, 0x2700);               /* Gate Scan Line                     */ 
  wr_reg(0x61, 0x0001);                 /* NDL,VLE, REV                       */ 
  wr_reg(0x6A, 0x0000);                 /* Set scrolling line                 */ 
 
  /* Partial Display Control -------------------------------------------------*/ 
  wr_reg(0x80, 0x0000); 
  wr_reg(0x81, 0x0000); 
  wr_reg(0x82, 0x0000); 
  wr_reg(0x83, 0x0000); 
  wr_reg(0x84, 0x0000); 
  wr_reg(0x85, 0x0000); 
 
  /* Panel Control -----------------------------------------------------------*/ 
  wr_reg(0x90, 0x0010); 
  wr_reg(0x92, 0x0000); 
  wr_reg(0x93, 0x0003); 
  wr_reg(0x95, 0x0110); 
  wr_reg(0x97, 0x0000); 
  wr_reg(0x98, 0x0000); 
 
  /* Set GRAM write direction 
     I/D=10 (Horizontal : increment, Vertical : increment) 
     AM=1   (address is updated in vertical writing direction)                */ 
  wr_reg(0x03, 0x1038); 
 
  wr_reg(0x07, 0x0137);                 /* 262K color and display ON          */ 
  LPC_GPIO4->FIOSET = 0x10000000; 
} 
 
 
/******************************************************************************* 
* Set draw window region to whole screen                                       * 
*   Parameter:                                                                 * 
*   Return:                                                                    * 
*******************************************************************************/ 
 
void GLCD_WindowMax (void) { 
 
  wr_reg(0x50, 0);                      /* Horizontal GRAM Start Address      */ 
  wr_reg(0x51, HEIGHT-1);               /* Horizontal GRAM End   Address (-1) */ 
  wr_reg(0x52, 0);                      /* Vertical   GRAM Start Address      */ 
  wr_reg(0x53, WIDTH-1);                /* Vertical   GRAM End   Address (-1) */ 
} 
 
 
/******************************************************************************* 
* Draw a pixel in foreground color                                             * 
*   Parameter:      x:        horizontal position                              * 
*                   y:        vertical position                                * 
*   Return:                                                                    * 
*******************************************************************************/ 
 
void GLCD_PutPixel (unsigned int x, unsigned int y) { 
 
  wr_reg(0x20, y); 
  wr_reg(0x21, WIDTH-1-x); 
  wr_cmd(0x22); 
  wr_dat(TextColor); 
} 
 
 
/******************************************************************************* 
* Set foreground color                                                         * 
*   Parameter:      color:    foreground color                                 * 
*   Return:                                                                    * 
*******************************************************************************/ 
 
void GLCD_SetTextColor (unsigned short color) { 
 
  TextColor = color; 
} 
 
 
/******************************************************************************* 
* Set background color                                                         * 
*   Parameter:      color:    background color                                 * 
*   Return:                                                                    * 
*******************************************************************************/ 
 
void GLCD_SetBackColor (unsigned short color) { 
 
  BackColor = color; 
} 
 
 
/******************************************************************************* 
* Clear display                                                                * 
*   Parameter:      color:    display clearing color                           * 
*   Return:                                                                    * 
*******************************************************************************/ 
 
void GLCD_Clear (unsigned short color) { 
  unsigned int   i; 
 
  GLCD_WindowMax(); 
 
  wr_reg(0x20, 0); 
  wr_reg(0x21, 0); 
  wr_cmd(0x22); 
  wr_dat_start(); 
  for(i = 0; i < (WIDTH*HEIGHT); i++) 
    wr_dat_only(color); 
  wr_dat_stop(); 
} 
 
 
/******************************************************************************* 
* Draw character on given position                                             * 
*   Parameter:      x:        horizontal position                              * 
*                   y:        vertical position                                * 
*                   c:        pointer to character bitmap                      * 
*   Return:                                                                    * 
*******************************************************************************/ 
 
void GLCD_DrawChar (unsigned int x, unsigned int y, unsigned short *c) { 
  int idx = 0, i, j; 
 
  x = WIDTH-x-CHAR_W; 
  wr_reg(0x50, y);                      /* Horizontal GRAM Start Address      */ 
  wr_reg(0x51, y+CHAR_H-1);             /* Horizontal GRAM End   Address (-1) */ 
  wr_reg(0x52, x);                      /* Vertical   GRAM Start Address      */ 
  wr_reg(0x53, x+CHAR_W-1);             /* Vertical   GRAM End   Address (-1) */ 
 
  wr_reg(0x20, y); 
  wr_reg(0x21, x); 
  wr_cmd(0x22); 
  wr_dat_start(); 
  for (j = 0; j < CHAR_H; j++) { 
    for (i = CHAR_W-1; i >= 0; i--) { 
      if((c[idx] & (1 << i)) == 0x00) { 
        wr_dat_only(BackColor); 
      } else { 
        wr_dat_only(TextColor); 
      } 
    } 
    c++; 
  } 
  wr_dat_stop(); 
} 
 
 
/******************************************************************************* 
* Disply character on given line                                               * 
*   Parameter:      ln:       line number                                      * 
*                   col:      column number                                    * 
*                   c:        ascii character                                  * 
*   Return:                                                                    * 
*******************************************************************************/ 
 
void GLCD_DisplayChar (unsigned int ln, unsigned int col, unsigned char c) { 
 
  c -= 32; 
  GLCD_DrawChar(col * CHAR_W, ln * CHAR_H, (unsigned short *)&Font_24x16[c * CHAR_H]); 
} 
 
 
/******************************************************************************* 
* Disply string on given line                                                  * 
*   Parameter:      ln:       line number                                      * 
*                   col:      column number                                    * 
*                   s:        pointer to string                                * 
*   Return:                                                                    * 
*******************************************************************************/ 
 
void GLCD_DisplayString (unsigned int ln, unsigned int col, unsigned char *s) { 
 
  GLCD_WindowMax(); 
  while (*s) { 
    GLCD_DisplayChar(ln, col++, *s++); 
  } 
} 
 
 
/******************************************************************************* 
* Clear given line                                                             * 
*   Parameter:      ln:       line number                                      * 
*   Return:                                                                    * 
*******************************************************************************/ 
 
void GLCD_ClearLn (unsigned int ln) { 
 
  GLCD_WindowMax(); 
  GLCD_DisplayString(ln, 0, "                    "); 
} 
 
/******************************************************************************* 
* Draw bargraph                                                                * 
*   Parameter:      x:        horizontal position                              * 
*                   y:        vertical position                                * 
*                   w:        maximum width of bargraph (in pixels)            * 
*                   val:      value of active bargraph (in 1/1024)             * 
*   Return:                                                                    * 
*******************************************************************************/ 
 
void GLCD_Bargraph (unsigned int x, unsigned int y, unsigned int w, unsigned int h, unsigned int val) { 
  int i,j; 
 
  x = WIDTH-x-w; 
  wr_reg(0x50, y);                      /* Horizontal GRAM Start Address      */ 
  wr_reg(0x51, y+CHAR_H-1);             /* Horizontal GRAM End   Address (-1) */ 
  wr_reg(0x52, x);                      /* Vertical   GRAM Start Address      */ 
  wr_reg(0x53, x+w-1);                  /* Vertical   GRAM End   Address (-1) */ 
 
  val = (val * w) >> 10;                /* Scale value for 24x12 characters   */ 
  wr_reg(0x20, y); 
  wr_reg(0x21, x); 
  wr_cmd(0x22); 
  wr_dat_start(); 
  for (i = 0; i < h; i++) { 
    for (j = w-1; j >= 0; j--) { 
      if(j >= val) { 
        wr_dat_only(BackColor); 
      } else { 
        wr_dat_only(TextColor); 
      } 
    } 
  } 
  wr_dat_stop(); 
} 
 
 
/******************************************************************************* 
* Display graphical bitmap image at position x horizontally and y vertically   * 
* (This function is optimized for 16 bits per pixel format, it has to be       * 
*  adapted for any other bits per pixel format)                                * 
*   Parameter:      x:        horizontal position                              * 
*                   y:        vertical position                                * 
*                   w:        width of bitmap                                  * 
*                   h:        height of bitmap                                 * 
*                   bitmap:   address at which the bitmap data resides         * 
*   Return:                                                                    * 
*******************************************************************************/ 
 
void GLCD_Bitmap (unsigned int x, unsigned int y, unsigned int w, unsigned int h, unsigned char *bitmap) { 
  unsigned int    i, j; 
  unsigned short *bitmap_ptr = (unsigned short *)bitmap; 
 
  x = WIDTH-x-w; 
  wr_reg(0x50, y);                      /* Horizontal GRAM Start Address      */ 
  wr_reg(0x51, y+h-1);                  /* Horizontal GRAM End   Address (-1) */ 
  wr_reg(0x52, x);                      /* Vertical   GRAM Start Address      */ 
  wr_reg(0x53, x+w-1);                  /* Vertical   GRAM End   Address (-1) */ 
 
  wr_reg(0x20, y); 
  wr_reg(0x21, x); 
  wr_cmd(0x22); 
  wr_dat_start(); 
  for (j = 0; j < h; j++) { 
    bitmap_ptr += w-1; 
    for (i = 0; i < w; i++) { 
      wr_dat_only(*bitmap_ptr--); 
    } 
    bitmap_ptr += w+1; 
  } 
  wr_dat_stop(); 
} 
 
 
/******************************************************************************* 
* Display graphical bmp file image at position x horizontally and y vertically * 
* (This function is optimized for 16 bits per pixel format, it has to be       * 
*  adapted for any other bits per pixel format)                                * 
*   Parameter:      x:        horizontal position                              * 
*                   y:        vertical position                                * 
*                   w:        width of bitmap                                  * 
*                   h:        height of bitmap                                 * 
*                   bmp:      address at which the bmp data resides            * 
*   Return:                                                                    * 
*******************************************************************************/ 
 
void GLCD_Bmp (unsigned int x, unsigned int y, unsigned int w, unsigned int h, unsigned char *bmp) { 
  unsigned int    i, j; 
  unsigned short *bitmap_ptr = (unsigned short *)bmp; 
 
  x = WIDTH-x-w; 
  wr_reg(0x50, y);                      /* Horizontal GRAM Start Address      */ 
  wr_reg(0x51, y+h-1);                  /* Horizontal GRAM End   Address (-1) */ 
  wr_reg(0x52, x);                      /* Vertical   GRAM Start Address      */ 
  wr_reg(0x53, x+w-1);                  /* Vertical   GRAM End   Address (-1) */ 
 
  wr_reg(0x20, y); 
  wr_reg(0x21, x); 
  wr_cmd(0x22); 
  wr_dat_start(); 
  bitmap_ptr += (h*w)-1; 
  for (j = 0; j < h; j++) { 
    for (i = 0; i < w; i++) { 
      wr_dat_only(*bitmap_ptr--); 
    } 
  } 
  wr_dat_stop(); 
} 
 
/******************************************************************************/