4412裸机程序之lcd

下面代码是在x4412板子上做的，Tiny4412最新板子背光打不开。

#include "regs.h"

#define RGB888(r, g, b)  (((r) << 16) | ((g) << 8) | (b) )

void clean_screen(unsigned long *fb, int w, int h)

{

    // green

    int i, j;

    for (i = 0; i < h; i ++) {

        for (j = 0; j < w; j ++) {

            fb[i * w + j] = RGB888(0, 255, 0);

        }       

    }

    // blue

    for (i = 200; i < h-200; i ++) {

        for (j = 200; j < w-300; j ++) {

            fb[i * w + j] = RGB888(0, 0, 255);

        }       

    }

}

void lcd_init(unsigned long fb)

{

    //Blacklight

    GPD0CON  &= ~(0xf<<0);

    GPD0CON  |=  (0x1<<0);

    GPD0PUD  &= ~(0x3<<0);

    GPD0PUD  |=  (0x2<<0);

    GPD0DAT  &= ~(0x1<<0);

    GPD0DAT  |=  (0x0<<0);

//Blacklight

    GPX3CON  &= ~(0xf<<20);

    GPX3CON  |=  (0x1<<20);

    GPX3PUD  &= ~(0x3<<10);

    GPX3PUD  |=  (0x2<<10);

    GPX3DAT  &= ~(0x1<<5);

    GPX3DAT  |=  (0x1<<5);

    /*

     *<Exyons 4412 datasheet pg138 pg141 pg144 pg147>

     *

     * GPF0CON : [31:0] : 0x2

     * GPF1CON : [31:0] : 0x2

     * GPF2CON : [31:0] : 0x2

     * GPF3CON : [31:0] : 0x2

     * */

    GPF0CON = 0x22222222;

    GPF1CON = 0x22222222;

    GPF2CON = 0x22222222;

    GPF3CON &= ~(0xffff);

    GPF3CON |= 0x2222;

   

    /*

     *<Exyons 4412 datasheet pg526>

     *CLK_DIV_LCD:

     *          [3:0]:FIMD0_RATIO   0

     *              SCLK_FIMD0 = MOUTFIMD0/(FIMD0_RATIO + 1)

     *                         = MOUTFIMD0/1 = 800MHz

     *              MOUTFIMD0 == SCLKmpll_user_t == 800MHz      <Exyons 4412 datasheet pg453> LCD0_BLK

     * */

    CLK_DIV_LCD &= ~0xf;

    /*

     *<Exyons 4412 datasheet pg501>

     *CLK_SRC_LCD0:

     *          [3:0]:FIMD0_SEL 0110 ===> SCLKmpll_user_t 选择时钟源为SCLKmpll_user_t

     *

     * */

    CLK_SRC_LCD0 &= ~0xf;

    CLK_SRC_LCD0 |= 6;

    //LCD0_SYS_PWR_REG == 7 Don't use

   

   

    /*<Exyons 4412 datasheet pg1799>

     *Using the display controller data, you can select one of the above data paths by setting LCDBLK_CFG Register

     *(0x1001_0210). For more information, refer to the "System Others" manual.

     *

     *

     * <Exyons 4412 datasheet pg880>

     * LCDBLK_CFG:

     *          [1] : FIMD of LBLK0 Bypass Selection    1 : FIMD Bypass   使用FIMD接口

     *

     * LCDBLK_CFG :

     *          [0]:MIE0_DISPON     1 :  PWM outpupt enable

     *

     *

     * */

    LCDBLK_CFG |= 1 << 1;

    LCDBLK_CFG2 |= 1;

    /*

     *<Exyons 4412 datasheet pg1869>

     *VIDCON0:

     *     [13:6]: CLKVAL_F     //设置lcd时钟分频系数

     *

     *  VCLK == 33.3Mhz         <S700-AT070TN92 pg14> DCLK  Frequency ===> Type : 33.3Mhz

     *  VCLK = FIMD * SCLK/(CLKVAL+1)

     *  VCLK =  800000000 / (CLKVAL + 1)  

     *  33300000 = 800000000 /(CLKVAL + 1)

     *  CLKVAL + 1 = 24.02

     *  CLKVAL = 23

     * */

    VIDCON0 = (23 << 6);

    /*

     *<Exyons 4412 datasheet pg1870 pg1848(时序)> <S700-AT070TN92 pg13(时序)>

     *VIDTCON1:

     *      [5]:IVSYNC  ===> 1 : Inverted(反转)

     *      [6]:IHSYNC  ===> 1 : Inverted(反转)

     *      [7]:IVCLK   ===> 1 : Fetches video data at VCLK rising edge (下降沿触发)

     *      [10:9]:FIXVCLK  ====> 01 : VCLK running

     * */

    VIDCON1 = (1 << 9) | (1 << 7) | (1 << 5) | (1 << 6);

    /*

     *<Exyons 4412 datasheet pg1874 pg1848(时序)> <S700-AT070TN92 pg13(时序)>

     *VIDTCON0:

     *       [23:16]:  VBPD + 1 <------> tvpw (1 - 20)  13

     *       [15:8]: VFPD + 1 <------> tvfp 22

     *       [7:0]: VSPW  + 1 <------> tvb - tvpw = 23 - 13 = 10

     * */

    VIDTCON0 = (12 << 16) | (21 << 8) | (9);

     /*<Exyons 4412 datasheet pg1874 pg1848(时序)> <S700-AT070TN92 pg13(时序)>

     *VIDTCON1:

     *       [23:16]:  HBPD + 1 <------> thpw (1 - 40)  36

     *       [15:8]:   HFPD + 1 <------> thfp 210

     *       [7:0]:    HSPW  + 1 <------> thb - thpw = 46 - 36 = 10

     */

    VIDTCON1 = (35 << 16) | (209 << 8) | (9);

    /*

     *<Exyons 4412 datasheet pg1875>

     *

     *HOZVAL = (Horizontal display size) – 1 and LINEVAL = (Vertical display size) – 1.

     * Horizontal(水平) display size : 800

     *Vertical(垂直) display size : 480

     * */

    VIDTCON2 = (599 << 11) | 1023;

    //win0

#ifdef BPP565

    /*

     *<Exyons 4412 datasheet pg1877>

     *WINCON0:

     *  [16]:Specifies Half-Word swap control bit.  1 = Enables swap

     *  [5:2]: Selects Bits Per Pixel (BPP) mode for Window image : 0101 ===> 16BPP

     *  [1]:Enables/disables video output   1 = Enables

     *

     * */

    WINCON0 = (1 << 16) | (5 << 2) | 1;

    /*

     *<Exyons 4412 datasheet pg1895>

     *VIDOSD0C:Specifies the Window Size (窗口尺寸 单位为word)

     *         

     *

     * */

    VIDOSD0C = 600 * 1024 >> 1;

#else

    /*

     *<Exyons 4412 datasheet pg1877>

     *WINCON0:

     *  [5:2]: Selects Bits Per Pixel (BPP) mode for Window image : 1011 ===> 24BPP

     *  [1]:Enables/disables video output   1 = Enables

     *

     * */

    WINCON0 = (11 << 2) | 1;

    /*

     *<Exyons 4412 datasheet pg1895>

     *VIDOSD0C:Specifies the Window Size (窗口尺寸 单位为word)

     *         

     *

     * */

    VIDOSD0C = 600 * 1024;

#endif

    //SHADOWCON &= ~(1 << 5); Don't use

    /*

     *<Exyons 4412 datasheet pg1891 pg1801>

     *[0]: Enables Channel 0. 1 = Enables

     * */

    SHADOWCON |= 1;

    /*

     *<Exyons 4412 datasheet  pg1894 pg1801>

     *[18:16] Selects Channel 0's channel. ===> 001 = Window 0

     *[2:0] Selects Window 0's channel.  ===> 001 = Channel 0

     *

     *

     * */

    WINCHMAP2 &= ~(7 << 16);

    WINCHMAP2 |= 1 << 16;

    WINCHMAP2 &= ~7;

    WINCHMAP2 |= 1;

    /*

     *<Exyons 4412 datasheet  pg1895>

     *VIDOSD0A: LCD左上角坐标

     *VIDOSD0B: LCD右下角坐标

     */

    VIDOSD0A = 0;

    VIDOSD0B = (1023 << 11) | 599;

    /*

     *<Exyons 4412 datasheet  pg1902>

     * VIDW00ADD0B0 : window0 frame buffer 起始地址

     *  VIDW00ADD1B0 : window0 frame buffer 结束地址

     * */

    VIDW00ADD0B0 = fb;

    VIDW00ADD1B0 = fb + 1024 * 600 * 4;

        VIDW00ADD2  = 1024;

    /*

     * <Exyons 4412 datasheet pg1869>

     * Display On: ENVID and ENVID_F are set to "1".

     *  [0]:ENVID ===> 1 = Enables

     *  [1]:ENVID_F ===> 1 = Enables

     * */

    VIDCON0 |= 3;   

}

int main()

{

    unsigned long fb = 0x53000000;

    clean_screen(fb, 1024, 600);

        lcd_init(fb);

       

   

}
https://github.com/cyj1988jyc/luoji4412/tree/master/ddrlcd