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/****************************************** 实验步骤 1.配置引脚功能,将其GPI、GPJ引脚设置为VD数据输出模式,及GPJ后几位设置成LCD时钟输出; 2.设置LCD时序值,初始化时序值。 (1)需要初始化时序:VSPW、VBPD、LINEVAL、VFPD、HSPW、HBPB、HOZVAL、HFPD、 CLKVAL(在LCD芯片手册中找到初始化时序图,然后找到对应的时序参数) (2)找到初始化这些时序信号相应的寄存器(在芯片手册中找到相应的寄存器,并对其初始化) (3)结合LCD芯片手册和时序图将对应参数的是设置出来 3.帧缓存初始化(帧缓冲指的是在内存中开辟出来的用来存储图像数据空间,并告知给LCD的CMA。) (1)设置窗口大小对应的寄存器 (2)告诉ADM寄存器内存起始地址和大小 4.杂项初始化() 5.画点 6.画线 7.绘制QQ图 8.单色显示 **********************************************************/ #define GPICON (*(volatile unsigned long *)0x7F008100) #define GPJCON (*(volatile unsigned long *)0x7F008120) #define MOFPCON (*(volatile unsigned long *)0x7410800C) #define SPCON (*(volatile unsigned long *)0x7F0081A0) #define VIDCON0 (*(volatile unsigned long *)0x77100000) #define VIDCON1 (*(volatile unsigned long *)0x77100004) #define VIDTCON0 (*(volatile unsigned long *)0x77100010) #define VIDTCON1 (*(volatile unsigned long *)0x77100014) #define VIDTCON2 (*(volatile unsigned long *)0x77100018) #define WINCON0 (*(volatile unsigned long *)0x77100020) #define VIDOSD0A (*(volatile unsigned long *)0x77100040) #define VIDOSD0B (*(volatile unsigned long *)0x77100044) #define VIDOSD0C (*(volatile unsigned long *)0x77100048) #define VIDW00ADD0B0 (*(volatile unsigned long *)0x771000A0) #define VIDW00ADD1B0 (*(volatile unsigned long *)0x771000D0) #define VSPW 9 #define VBPD 1 #define LINEVAL 271 #define VFPD 1 //#define CLKVAL 4 //10 = 100/((CLKVAL+1)*2) #define HSPW 40 #define HBPD 1 #define HOZVAL 479 #define HFPD 1 #define LeftTopX 0 #define LeftTopY 0 #define RightBotX 479 #define RightBotY 271 #define FRAME_BUFFER 0x54000000 extern unsigned char bmp[135300];/* 导出的时候切记不要包含图像头数据!!!!!! */ void lcd_port_init() { GPICON = 0xaaaaaaaa; GPJCON = 0xaaaaaaaa; } void lcd_contral_init() { MOFPCON = 0<<3; /* 这一位必须设置为0 */ SPCON = 0x01; /* RGB模式下必须设置为1 */ VIDCON0 = (14<<6)|(1<<4)|(3<<0); /* 禁止视频输出和控制信号 选择视频时钟源 确定VCLK和CLKVAL[7:0]的值[VCLK=视频时钟源/(CLKVAL+1)] */ VIDCON1 = (1<<5)|(1<<6); VIDTCON0 = (VBPD<<16)|(VFPD<<8)|(VSPW<<0); /* 时钟初始化 */ VIDTCON1 = (HBPD<<16)|(HFPD<<8)|(HSPW<<0); VIDTCON2 = (LINEVAL<<11)|(HOZVAL<<0); WINCON0 = (1<<16)|(0xb<<2)|(1<<0); /* 禁止视频输出和视频控制信号 选择BPP图像窗口模式(24bpp) 打开半字交换控制位 */ VIDOSD0A = (LeftTopX<<11)|(LeftTopY<<0); /* 设置视频窗口0的位置 */ VIDOSD0B = (RightBotX<<11)|(RightBotY<<0); VIDOSD0C = (LINEVAL+1)|(HOZVAL+1); /* 设置视频窗口0的尺寸 */ VIDW00ADD0B0 = FRAME_BUFFER; /* 设置缓存区开始地址 */ VIDW00ADD1B0 = ((FRAME_BUFFER+(HOZVAL+1)*4*(LINEVAL+1)))&(0xffffff); /* 设置缓存区结束地址 ????*/ } void lcd_init() { lcd_port_init(); lcd_contral_init(); //打开LCD电源 } void point(int row, int col, int color) { int red, green, blue; unsigned long *point = (unsigned long*)FRAME_BUFFER; red = (color>>16) & 0xff; green = (color>>8) & 0xff; blue = (color>>0) & 0xff; *(point + row*480 + col) = (green<<24) | (blue<<16) | red; /* 具体不知原因 试出来的 */ } void paint_bmp(const unsigned char bmp[]) { int i,j; unsigned char *p = (unsigned char *)bmp; int blue, green,red; int color; for(i=0;i<205;i++) /* 必须和导出的尺寸一致!!! */ { for(j=0;j<220;j++) { red = *p++; /* 必须和导出的颜色顺序一模一样!!!!!! */ blue = *p++; green = *p++; color = (red<<16)|(green<<8)|(blue<<0); point(i,j,color); } } } void lcd_test() { int y; for(y=1;y<470;y++) point(110,y,0xFF0000); paint_bmp(bmp); }
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原文地址:http://www.cnblogs.com/chd-zhangbo/p/5299132.html