LPC1788的LCD接口驱动真彩屏

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#ifndef __LCD_H_

#define __LCD_H_

#include "common.h"

#include "debugserial.h"

#include "delay.h"

#include "sdram.h"

#define White          0xFFFFFF

#define Black          0x000000

#define Blue           0xFF0000

#define Red            0x0000FF

#define Green          0x00FF00

#define Yellow         0x00FFFF

#define purple         0xff00ff

#define pixel_clock     9000000 //像素时钟设置为9M

#define lcd_h_size      480     //根据数据手册典型值设置

#define lcd_h_pulse     2

#define lcd_h_back_proch    43

#define lcd_h_front_porch   8

#define lcd_v_size      272

#define lcd_v_pulse     10

#define lcd_v_back_proch    12

#define lcd_v_front_porch   4

#define lcd_show_delay      10000

#define LCD_VRAM_BASE_ADDR  ((unsigned long)SDRAM_BASE_ADDR + 0x00010000)//显示基地址

#define LCD_CURSOR_BASE_ADDR    ((unsigned long)0x20088800)

void lcd_init(u32 defaultColor);

void lcd_clear(u32 color);

void lcd_set_backlight(u8 enable);

void lcd_draw_point(u32 x,u32 y,u32 color);

u32 lcd_read_point(u32 x,u32 y);

void lcd_draw_line(u16 x1, u16 y1, u16 x2, u16 y2,u32 color);

void lcd_draw_rect(u16 x1, u16 y1, u16 x2, u16 y2,u32 color);

void lcd_draw_cicle(u16 x0,u16 y0,u8 r,u32 color);

void lcd_test(u32 color);

#endif

#include "lcd.h"

//lcd io初始化

static void lcd_in_init(void)

{

    LPC_SC->PCONP |= (1<<15);//打开时钟

    /* R */

    LPC_IOCON->P0_4  = 0x27;    // LCD_VD_0

    LPC_IOCON->P0_5   = 0x27;   // LCD_VD_1

    LPC_IOCON->P4_28   = 0x27;  // LCD_VD_2

    LPC_IOCON->P4_29  = 0x27;   // LCD_VD_3

    LPC_IOCON->P2_6   = 0x27;   // LCD_VD_4

    LPC_IOCON->P2_7   = 0x27;   // LCD_VD_5

    LPC_IOCON->P2_8   = 0x27;   // LCD_VD_6

    LPC_IOCON->P2_9  = 0x27;    // LCD_VD_7

    /* G */    

    LPC_IOCON->P0_6  = 0x27;    // LCD_VD_8

    LPC_IOCON->P0_7  = 0x27;    // LCD_VD_9

    LPC_IOCON->P1_20  = 0x27;   // LCD_VD_10

    LPC_IOCON->P1_21  = 0x27;   // LCD_VD_11

    LPC_IOCON->P1_22  = 0x27;   // LCD_VD_12

    LPC_IOCON->P1_23  = 0x27;   // LCD_VD_13

    LPC_IOCON->P1_24  = 0x27;   // LCD_VD_14

    LPC_IOCON->P1_25  = 0x27;   // LCD_VD_15

    /* B */

    LPC_IOCON->P0_8  = 0x27;    // LCD_VD_16

    LPC_IOCON->P0_9  = 0x27;    // LCD_VD_17

    LPC_IOCON->P2_12  = 0x27;   // LCD_VD_18

    LPC_IOCON->P2_13  = 0x27;   // LCD_VD_19

    LPC_IOCON->P1_26  = 0x27;   // LCD_VD_20

    LPC_IOCON->P1_27  = 0x27;   // LCD_VD_21

    LPC_IOCON->P1_28  = 0x27;   // LCD_VD_22

    LPC_IOCON->P1_29  = 0x27;   // LCD_VD_23

    LPC_IOCON->P2_2   = 0x27;   // LCD_DCLK

    LPC_IOCON->P2_5   = 0x27;   // LCD_LP -- HSYNC

    LPC_IOCON->P2_3   = 0x27;   // LCD_FP -- VSYNC

    LPC_IOCON->P2_4   = 0x27;   // LCD_ENAB_M -- LCDDEN

    LPC_IOCON->P2_0   = 0x27;   // LCD_PWR

}

void lcd_init(u32 defaultColor)

{

    u32 *pDst = (u32 *)LCD_VRAM_BASE_ADDR;//显示数据基地址

    u32 i= 0;

    //打开LCD时钟

    LPC_SC->PCONP |= 1<<0;

    lcd_in_init();//初始化IO

    //初始化背光引脚

    LPC_IOCON->P2_1 = 0x00;

    LPC_IOCON->P2_1 |= (2<<3);//控制背光

    P2dir(1) = 1;

    P2high(1) = 1;

    LPC_LCD->CRSR_CTRL &=~(1<<0);//禁止光标

    LPC_LCD->CTRL = 0;//禁止并清零LCD

    LPC_LCD->CTRL &= ~(7<<1);//清零面板设置

    LPC_LCD->CTRL |= (5<<1);//设置面板tft 24bpp

    LPC_LCD->CTRL |= (1<<5);//tft模式

    LPC_LCD->CTRL &= ~(1<<7);//单面板

    LPC_LCD->CTRL &= ~(1<<8);//RGB颜色

    LPC_LCD->CTRL &= ~(1<<9);//小端数据存储

    LPC_LCD->CTRL &= ~(1<<10);//像素排序小端

    LPC_LCD->CTRL &= ~(1<<11);//信号先维持低电平

    LPC_SC->LCD_CFG = ApbClock / pixel_clock;//设置像素时钟 根据数据手册来

    LPC_LCD->POL |=(1<<26);//像素时钟分频旁路

    LPC_LCD->POL &= ~(1<<5);//模块选择cclk时钟

    LPC_LCD->POL |= (1<<11);//FB管脚低电平有效

    LPC_LCD->POL |= (1<<12);//LP管脚低电平有效

    LPC_LCD->POL &= ~(1<<13);//像素信号于时钟上升沿驱动

    LPC_LCD->POL &= ~(1<<14);//高电平输出使能

    LPC_LCD->POL &= ~(0x3FF <<16);//清除h_szie

    LPC_LCD->POL |= (lcd_h_size-1)<<16;//设置h_size

    //设置水平时序控制

    LPC_LCD->TIMH = 0;

    LPC_LCD->TIMH |= (lcd_h_back_proch - 1)<<24;//水平后延

    LPC_LCD->TIMH |= (lcd_h_front_porch - 1)<<16;//水平前沿

    LPC_LCD->TIMH |= (lcd_h_pulse - 1)<<8;  //水平同步脉冲宽度

    LPC_LCD->TIMH |= ((lcd_h_size/16) - 1)<<2;//每一行的像素点

    //设置竖直时序控制

    LPC_LCD->TIMV = 0; 

    LPC_LCD->TIMV |= (lcd_v_back_proch)<<24;//竖直后延

    LPC_LCD->TIMV |= (lcd_v_front_porch)<<16;//竖直前沿

    LPC_LCD->TIMV |= (lcd_v_pulse - 1)<<10;//竖直脉冲宽度

    LPC_LCD->TIMV |= lcd_v_size - 1;        //像素

    // 设置显示缓冲区地址

    LPC_LCD->UPBASE = LCD_VRAM_BASE_ADDR & (~(7<<0)) ;

    LPC_LCD->LPBASE = LCD_VRAM_BASE_ADDR & (~(7<<0)) ;

    for( i = 0; (lcd_h_size * lcd_v_size) > i; i++)

    {

        *pDst++ = defaultColor;//初始化颜色

    }

    i = lcd_show_delay;

    while(i--);

    LPC_LCD->CTRL |= (1<<0);//使能lcd

    LPC_LCD->CTRL |= (1<<11);//使能lcd功率

}

void lcd_clear(u32 color)

{

    u32 *pDst = (u32 *)LCD_VRAM_BASE_ADDR;//显示数据基地址

    u32 i= 0;

    for( i = 0; (lcd_h_size * lcd_v_size) > i; i++)

    {

        *pDst++ = color;//初始化颜色

    }

}

void lcd_set_backlight(u8 enable)

{

    if(enable)P2high(1) = 1;

    else P2low(1) = 1;

}

void lcd_draw_point(u32 x,u32 y,u32 color)

{

    u32 *pDst = (u32 *)LCD_VRAM_BASE_ADDR;//显示数据基地址

    if(x < lcd_h_size && y < lcd_v_size)

    {

        pDst = pDst+x + (y*lcd_h_size);

        *pDst = color;

    }

}

u32 lcd_read_point(u32 x,u32 y)

{

    u32 *pDst = (u32 *)LCD_VRAM_BASE_ADDR;//显示数据基地址

    u32 color = 0x00000000;

    if(x < lcd_h_size && y < lcd_v_size)

    {

        pDst = pDst+x + (y*lcd_h_size);

        color = *pDst;

    }

    return color;

}

//x1,y1:起点坐标

//x2,y2:终点坐标 

void lcd_draw_line(u16 x1, u16 y1, u16 x2, u16 y2,u32 color)

{

    u16 t;

    int xerr=0,yerr=0,delta_x,delta_y,distance;

    int incx,incy,uRow,uCol;

    delta_x=x2-x1; //计算坐标增量

    delta_y=y2-y1;

    uRow=x1;

    uCol=y1;

    if(delta_x>0)incx=1; //设置单步方向

    else if(delta_x==0)incx=0;//垂直线

    else {incx=-1;delta_x=-delta_x;}

    if(delta_y>0)incy=1;

    else if(delta_y==0)incy=0;//水平线

    else{incy=-1;delta_y=-delta_y;}

    if( delta_x>delta_y)distance=delta_x; //选取基本增量坐标轴

    else distance=delta_y;

    for(t=0;t<=distance+1;t++ )//画线输出

    { 

        lcd_draw_point(uRow,uCol,color);//画点

        xerr+=delta_x ;

        yerr+=delta_y ;

        if(xerr>distance)

        {

            xerr-=distance;

            uRow+=incx;

        }

        if(yerr>distance)

        {

            yerr-=distance;

            uCol+=incy;

        }

    } 

}

//画矩形  

//(x1,y1),(x2,y2):矩形的对角坐标

void lcd_draw_rect(u16 x1, u16 y1, u16 x2, u16 y2,u32 color)

{

    lcd_draw_line(x1,y1,x2,y1,color);

    lcd_draw_line(x1,y1,x1,y2,color);

    lcd_draw_line(x1,y2,x2,y2,color);

    lcd_draw_line(x2,y1,x2,y2,color);

}

//在指定位置画一个指定大小的圆

//(x,y):中心点

//r    :半径

void lcd_draw_cicle(u16 x0,u16 y0,u8 r,u32 color)

{

    int a,b;

    int di;

    a=0;b=r;     

    di=3-(r<<1);             //判断下个点位置的标志

    while(a<=b)

    {

        lcd_draw_point(x0+a,y0-b,color);             //5

        lcd_draw_point(x0+b,y0-a,color);             //0          

        lcd_draw_point(x0+b,y0+a,color);             //4              

        lcd_draw_point(x0+a,y0+b,color);             //6

        lcd_draw_point(x0-a,y0+b,color);             //1      

        lcd_draw_point(x0-b,y0+a,color);            

        lcd_draw_point(x0-a,y0-b,color);             //2            

        lcd_draw_point(x0-b,y0-a,color);             //7                

        a++;

        //使用Bresenham算法画圆    

        if(di<0)di +=4*a+6;  

        else

        {

            di+=10+4*(a-b);  

            b--;

        }                          

    }

}

void lcd_test(u32 color)

{

    u32 x = lcd_h_size/2;

    u32 y = lcd_v_size/2;

    u32 i = 0, j = 0;

    while(1)

    {

        if(i >= x && j >= y)break;

        if(i < x)i++;

        if(j < y)j++;

        lcd_draw_rect(x-i,y-j,x+i,y+j,color);

        DelayMs(10);

    }

}

LPC1788的LCD接口驱动真彩屏

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原文地址：http://www.cnblogs.com/dengxiaojun/p/4338709.html