LCD裸板驱动
打开电路图观察到相应的寄存器：
可以观察到 LCD1由45根线来控制，主要配置的寄存器是24根RGB以及TOU1 EINT10 以及VDEN VYNC HSYNC VCLK驱动；
在核心板中找到网标，找出相应的寄存器；
在核心板子里面找出对应寄存器，配置好；
其中，详细寄存器的描述如以下代码：
1 #include "regs.h" 2 3 int (*printf)(char *, ...) = 0xc3e114d8; 4 5 void clean_screen(unsigned long *addr); 6 7 int main() 8 { 9 10 unsigned long addr = 0x52000000; 11 clean_screen(addr); 12 ///////// 13 //准备：打开时钟 14 printf("hahahah\n"); 15 LCDBLK_CFG = 2; 16 CLK_SRC_LCD0 = 6; 17 CLK_DIV_LCD = 0; 18 CLK_GATE_IP_LCD = 1; 19 //配时钟 20 21 #if 0 22 GPD0CON &= ~(0xf << 4); 23 GPD0CON |= (0x3 << 4); 24 #else 25 26 //////////////////// 27 //第一步：配置 OUT1 EINT10 以及24根RGB 28 GPD0CON = (1 << 4); 29 GPD0DAT = (1 << 1); 30 //配置CPD0 OUT1 31 #endif 32 GPX1CON &= ~(0xf << 8); 33 GPX1CON |= (0x2 << 8); 34 //EINT10寄存器 35 // 36 GPF0CON = 0x22222222; 37 GPF1CON = 0x22222222; 38 GPF2CON = 0x22222222; 39 GPF3CON = 0x2222; 40 //RGB lcd dv 41 42 printf("heheheh\n"); 43 44 /////////////////////// 45 //第二步：看时序图配置相关寄存器 46 //pages 1860 47 //使能video 以及显示控制信号 28为时钟频率 详见 注释1 48 VIDCON0 = 1 | (1 << 1) | (1 << 5) | (28 << 6); 49 //配置IVDEN IVSYNC IHSYNC IVCLK 50 VIDCON1 = (1 << 5) | (1 << 6) | (1 << 7); 51 VIDCON2 = 0; 52 53 //配置 VSPW VFPD VBPD VBPDE VFPDE HBPD HFPD HSPW 54 VIDTCON0 = 9 | (21 << 8) | (12 << 16); 55 VIDTCON1 = 19 | (209 << 8) | (25 << 16); 56 VIDTCON2 = 799 | (479 << 11); 57 VIDTCON3 = 0; 58 59 /////////////////// 60 //第三步配置窗口 61 //开启频道0 62 SHADOWCON = 0x1; 63 //指定输出的开关 以及BBP模式为RGB 888 64 WINCON0 = 1 | (13 << 2); 65 //窗口左上，右下以及窗口大小 66 VIDOSD0A = 0 | (0 << 11); 67 VIDOSD0B = 479 | (799 << 11); 68 VIDOSD0C = 800 * 480; 69 //定义取数据的详细地址 70 VIDW00ADD0B0 = addr; 71 VIDW00ADD1B0 = addr + 800 * 480 * 4; 72 //定义是横屏还是竖屏 73 VIDW00ADD2 = 800; 74 } 75 76 void clean_screen(unsigned long *addr) 77 { 78 int i = 0; 79 for(i=0; i<480*800; i++) 80 addr[i] = 0x00f0000f; 81 ///开始时候打印图片的值 82 } 83 84
其中第二步，对应时序图，列出各个时间表：
其中，页面频率的值计算公式是：
第三步，配置相关窗口寄存器的值，以及取数据的地址。
驱动代码：
1 #include "regs.h" 2 3 int (*printf)(char *, ...) = 0xc3e114d8; 4 5 void clean_screen(unsigned long *addr); 6 7 int main() 8 { 9 unsigned long addr = 0x52000000; 10 clean_screen(addr); 11 12 printf("hahahah\n"); 13 CLK_SRC_LCD0 = 6; 14 CLK_DIV_LCD = 0; 15 CLK_GATE_IP_LCD = 1; 16 17 #if 0 18 GPD0CON &= ~(0xf << 4); 19 GPD0CON |= (0x3 << 4); 20 #else 21 GPD0CON = (1 << 4); 22 GPD0DAT = (1 << 1); 23 #endif 24 GPX1CON &= ~(0xf << 8); 25 GPX1CON |= (0x2 << 8); 26 GPF0CON = 0x22222222; 27 GPF1CON = 0x22222222; 28 GPF2CON = 0x22222222; 29 GPF3CON = 0x2222; 30 31 printf("heheheh\n"); 32 //pages 1860 33 VIDCON0 = 1 | (1 << 1) | (1 << 5) | (28 << 6); 34 VIDCON1 = (1 << 5) | (1 << 6) | (1 << 7); 35 VIDCON2 = 0; 36 VIDTCON0 = 9 | (21 << 8) | (12 << 16); 37 VIDTCON1 = 19 | (209 << 8) | (25 << 16); 38 VIDTCON2 = 799 | (479 << 11); 39 VIDTCON3 = 0; 40 WINCON0 = 1 | (13 << 2); 41 VIDOSD0A = 0 | (0 << 11); 42 VIDOSD0B = 479 | (799 << 11); 43 VIDOSD0C = 800 * 480; 44 VIDW00ADD0B0 = addr; 45 VIDW00ADD1B0 = addr + 800 * 480 * 4; 46 VIDW00ADD2 = 480; 47 } 48 49 void clean_screen(unsigned long *addr) 50 { 51 int i = 0; 52 for(i=0; i<480*800; i++) 53 addr[i] = 0x00ff0000; 54 } 55 56 57 58
1 #define CLK_SRC_LCD0 (*(volatile unsigned long *)0x1003c234) 2 #define CLK_DIV_LCD (*(volatile unsigned long *)0x1003c534) 3 #define CLK_GATE_IP_LCD (*(volatile unsigned long *)0x1003c934) 4 5 #define GPIO_BASE 0x11400000 6 7 #define GPD0CON (*(volatile unsigned long *)(GPIO_BASE + 0x00A0)) 8 #define GPD0DAT (*(volatile unsigned long *)(GPIO_BASE + 0x00A4)) 9 #define GPX1CON (*(volatile unsigned long *)(GPIO_BASE + 0x0C20)) 10 #define GPF0CON (*(volatile unsigned long *)(GPIO_BASE + 0x0180)) 11 #define GPF1CON (*(volatile unsigned long *)(GPIO_BASE + 0x01A0)) 12 #define GPF2CON (*(volatile unsigned long *)(GPIO_BASE + 0x01C0)) 13 #define GPF3CON (*(volatile unsigned long *)(GPIO_BASE + 0x01E0)) 14 15 #define LCD_BASE 0x11C00000 16 17 #define VIDCON0 (*(volatile unsigned long *)(LCD_BASE + 0x0000)) 18 #define VIDCON1 (*(volatile unsigned long *)(LCD_BASE + 0x0004)) 19 #define VIDCON2 (*(volatile unsigned long *)(LCD_BASE + 0x0008)) 20 #define VIDCON3 (*(volatile unsigned long *)(LCD_BASE + 0x000C)) 21 #define VIDTCON0 (*(volatile unsigned long *)(LCD_BASE + 0x0010)) 22 #define VIDTCON1 (*(volatile unsigned long *)(LCD_BASE + 0x0014)) 23 #define VIDTCON2 (*(volatile unsigned long *)(LCD_BASE + 0x0018)) 24 #define VIDTCON3 (*(volatile unsigned long *)(LCD_BASE + 0x001C)) 25 #define WINCON0 (*(volatile unsigned long *)(LCD_BASE + 0x0020)) 26 #define WINCON1 (*(volatile unsigned long *)(LCD_BASE + 0x0024)) 27 #define WINCON2 (*(volatile unsigned long *)(LCD_BASE + 0x0028)) 28 #define WINCON3 (*(volatile unsigned long *)(LCD_BASE + 0x002C)) 29 #define WINCON4 (*(volatile unsigned long *)(LCD_BASE + 0x0030)) 30 #define SHADOWCON (*(volatile unsigned long *)(LCD_BASE + 0x0034)) 31 #define WINCHMAP2 (*(volatile unsigned long *)(LCD_BASE + 0x003C)) 32 #define VIDOSD0A (*(volatile unsigned long *)(LCD_BASE + 0x0040)) 33 #define VIDOSD0B (*(volatile unsigned long *)(LCD_BASE + 0x0044)) 34 #define VIDOSD0C (*(volatile unsigned long *)(LCD_BASE + 0x0048)) 35 #define VIDOSD1A (*(volatile unsigned long *)(LCD_BASE + 0x0050)) 36 #define VIDOSD1B (*(volatile unsigned long *)(LCD_BASE + 0x0054)) 37 #define VIDOSD1C (*(volatile unsigned long *)(LCD_BASE + 0x0058)) 38 #define VIDOSD1D (*(volatile unsigned long *)(LCD_BASE + 0x005C)) 39 #define VIDOSD2A (*(volatile unsigned long *)(LCD_BASE + 0x0060)) 40 #define VIDOSD2B (*(volatile unsigned long *)(LCD_BASE + 0x0064)) 41 #define VIDOSD2C (*(volatile unsigned long *)(LCD_BASE + 0x0068)) 42 #define VIDOSD2D (*(volatile unsigned long *)(LCD_BASE + 0x006C)) 43 #define VIDOSD3A (*(volatile unsigned long *)(LCD_BASE + 0x0070)) 44 #define VIDOSD3B (*(volatile unsigned long *)(LCD_BASE + 0x0074)) 45 #define VIDOSD3C (*(volatile unsigned long *)(LCD_BASE + 0x0078)) 46 #define VIDOSD4A (*(volatile unsigned long *)(LCD_BASE + 0x0080)) 47 #define VIDOSD4B (*(volatile unsigned long *)(LCD_BASE + 0x0084)) 48 #define VIDOSD4C (*(volatile unsigned long *)(LCD_BASE + 0x0088)) 49 #define VIDW00ADD0B0 (*(volatile unsigned long *)(LCD_BASE + 0x00A0)) 50 #define VIDW00ADD0B1 (*(volatile unsigned long *)(LCD_BASE + 0x00A4)) 51 #define VIDW00ADD0B2 (*(volatile unsigned long *)(LCD_BASE + 0x20A0)) 52 #define VIDW01ADD0B0 (*(volatile unsigned long *)(LCD_BASE + 0x00A8)) 53 #define VIDW01ADD0B1 (*(volatile unsigned long *)(LCD_BASE + 0x00AC)) 54 #define VIDW01ADD0B2 (*(volatile unsigned long *)(LCD_BASE + 0x20A8)) 55 #define VIDW02ADD0B0 (*(volatile unsigned long *)(LCD_BASE + 0x00B0)) 56 #define VIDW02ADD0B1 (*(volatile unsigned long *)(LCD_BASE + 0x00B4)) 57 #define VIDW02ADD0B2 (*(volatile unsigned long *)(LCD_BASE + 0x20B0)) 58 #define VIDW03ADD0B0 (*(volatile unsigned long *)(LCD_BASE + 0x00B8)) 59 #define VIDW03ADD0B1 (*(volatile unsigned long *)(LCD_BASE + 0x00BC)) 60 #define VIDW03ADD0B2 (*(volatile unsigned long *)(LCD_BASE + 0x20B8)) 61 #define VIDW04ADD0B0 (*(volatile unsigned long *)(LCD_BASE + 0x00C0)) 62 #define VIDW04ADD0B1 (*(volatile unsigned long *)(LCD_BASE + 0x00C4)) 63 #define VIDW04ADD0B2 (*(volatile unsigned long *)(LCD_BASE + 0x20C0)) 64 #define VIDW00ADD1B0 (*(volatile unsigned long *)(LCD_BASE + 0x00D0)) 65 #define VIDW00ADD1B1 (*(volatile unsigned long *)(LCD_BASE + 0x00D4)) 66 #define VIDW00ADD1B2 (*(volatile unsigned long *)(LCD_BASE + 0x20D0)) 67 #define VIDW01ADD1B0 (*(volatile unsigned long *)(LCD_BASE + 0x00D8)) 68 #define VIDW01ADD1B1 (*(volatile unsigned long *)(LCD_BASE + 0x00DC)) 69 #define VIDW01ADD1B2 (*(volatile unsigned long *)(LCD_BASE + 0x20D8)) 70 #define VIDW02ADD1B0 (*(volatile unsigned long *)(LCD_BASE + 0x00E0)) 71 #define VIDW02ADD1B1 (*(volatile unsigned long *)(LCD_BASE + 0x00E4)) 72 #define VIDW02ADD1B2 (*(volatile unsigned long *)(LCD_BASE + 0x20E0)) 73 #define VIDW03ADD1B0 (*(volatile unsigned long *)(LCD_BASE + 0x00E8)) 74 #define VIDW03ADD1B1 (*(volatile unsigned long *)(LCD_BASE + 0x00EC)) 75 #define VIDW03ADD1B2 (*(volatile unsigned long *)(LCD_BASE + 0x20E8)) 76 #define VIDW04ADD1B0 (*(volatile unsigned long *)(LCD_BASE + 0x00F0)) 77 #define VIDW04ADD1B1 (*(volatile unsigned long *)(LCD_BASE + 0x00F4)) 78 #define VIDW04ADD1B2 (*(volatile unsigned long *)(LCD_BASE + 0x20F0)) 79 #define VIDW00ADD2 (*(volatile unsigned long *)(LCD_BASE + 0x0100)) 80 #define VIDW01ADD2 (*(volatile unsigned long *)(LCD_BASE + 0x0104)) 81 #define VIDW02ADD2 (*(volatile unsigned long *)(LCD_BASE + 0x0108)) 82 #define VIDW03ADD2 (*(volatile unsigned long *)(LCD_BASE + 0x010C)) 83 #define VIDW04ADD2 (*(volatile unsigned long *)(LCD_BASE + 0x0110)) 84 #define VIDINTCON0 (*(volatile unsigned long *)(LCD_BASE + 0x0130)) 85 #define VIDINTCON1 (*(volatile unsigned long *)(LCD_BASE + 0x0134)) 86 #define W1KEYCON0 (*(volatile unsigned long *)(LCD_BASE + 0x0140)) 87 #define W1KEYCON1 (*(volatile unsigned long *)(LCD_BASE + 0x0144)) 88 #define W2KEYCON0 (*(volatile unsigned long *)(LCD_BASE + 0x0148)) 89 #define W2KEYCON1 (*(volatile unsigned long *)(LCD_BASE + 0x014C)) 90 #define W3KEYCON0 (*(volatile unsigned long *)(LCD_BASE + 0x0150)) 91 #define W3KEYCON1 (*(volatile unsigned long *)(LCD_BASE + 0x0154)) 92 #define W4KEYCON0 (*(volatile unsigned long *)(LCD_BASE + 0x0158)) 93 #define W4KEYCON1 (*(volatile unsigned long *)(LCD_BASE + 0x015C)) 94 #define W1KEYALPHA (*(volatile unsigned long *)(LCD_BASE + 0x0160)) 95 #define W2KEYALPHA (*(volatile unsigned long *)(LCD_BASE + 0x0164)) 96 #define W3KEYALPHA (*(volatile unsigned long *)(LCD_BASE + 0x0168)) 97 #define W4KEYALPHA (*(volatile unsigned long *)(LCD_BASE + 0x016C)) 98 #define DITHMODE (*(volatile unsigned long *)(LCD_BASE + 0x0170)) 99 #define WIN0MAP (*(volatile unsigned long *)(LCD_BASE + 0x0180)) 100 #define WIN1MAP (*(volatile unsigned long *)(LCD_BASE + 0x0184)) 101 #define WIN2MAP (*(volatile unsigned long *)(LCD_BASE + 0x0188)) 102 #define WIN3MAP (*(volatile unsigned long *)(LCD_BASE + 0x018C)) 103 #define WIN4MAP (*(volatile unsigned long *)(LCD_BASE + 0x0190)) 104 #define WPALCON_H (*(volatile unsigned long *)(LCD_BASE + 0x019C)) 105 #define WPALCON_L (*(volatile unsigned long *)(LCD_BASE + 0x01A0)) 106 #define TRIGCON (*(volatile unsigned long *)(LCD_BASE + 0x01A4)) 107 #define I80IFCONA0 (*(volatile unsigned long *)(LCD_BASE + 0x01B0)) 108 #define I80IFCONA1 (*(volatile unsigned long *)(LCD_BASE + 0x01B4)) 109 #define I80IFCONB0 (*(volatile unsigned long *)(LCD_BASE + 0x01B8)) 110 #define I80IFCONB1 (*(volatile unsigned long *)(LCD_BASE + 0x01BC)) 111 #define COLORGAINCON (*(volatile unsigned long *)(LCD_BASE + 0x01C0)) 112 #define LDI_CMDCON0 (*(volatile unsigned long *)(LCD_BASE + 0x01D0)) 113 #define LDI_CMDCON1 (*(volatile unsigned long *)(LCD_BASE + 0x01D4)) 114 #define SIFCCON0 (*(volatile unsigned long *)(LCD_BASE + 0x01E0)) 115 #define SIFCCON1 (*(volatile unsigned long *)(LCD_BASE + 0x01E4)) 116 #define SIFCCON2 (*(volatile unsigned long *)(LCD_BASE + 0x01E8)) 117 #define HUECOEF_CR_1 (*(volatile unsigned long *)(LCD_BASE + 0x01EC)) 118 #define HUECOEF_CR_2 (*(volatile unsigned long *)(LCD_BASE + 0x01F0)) 119 #define HUECOEF_CR_3 (*(volatile unsigned long *)(LCD_BASE + 0x01F4)) 120 #define HUECOEF_CR_4 (*(volatile unsigned long *)(LCD_BASE + 0x01F8)) 121 #define HUECOEF_CB_1 (*(volatile unsigned long *)(LCD_BASE + 0x01FC)) 122 #define HUECOEF_CB_2 (*(volatile unsigned long *)(LCD_BASE + 0x0200)) 123 #define HUECOEF_CB_3 (*(volatile unsigned long *)(LCD_BASE + 0x0204)) 124 #define HUECOEF_CB_4 (*(volatile unsigned long *)(LCD_BASE + 0x0208)) 125 #define HUEOFFSET (*(volatile unsigned long *)(LCD_BASE + 0x020C)) 126 #define VIDW0ALPHA0 (*(volatile unsigned long *)(LCD_BASE + 0x021C)) 127 #define VIDW0ALPHA1 (*(volatile unsigned long *)(LCD_BASE + 0x0220)) 128 #define VIDW1ALPHA0 (*(volatile unsigned long *)(LCD_BASE + 0x0224)) 129 #define VIDW1ALPHA1 (*(volatile unsigned long *)(LCD_BASE + 0x0228)) 130 #define VIDW2ALPHA0 (*(volatile unsigned long *)(LCD_BASE + 0x022C)) 131 #define VIDW2ALPHA1 (*(volatile unsigned long *)(LCD_BASE + 0x0230)) 132 #define VIDW3ALPHA0 (*(volatile unsigned long *)(LCD_BASE + 0x0234)) 133 #define VIDW3ALPHA1 (*(volatile unsigned long *)(LCD_BASE + 0x0238)) 134 #define VIDW4ALPHA0 (*(volatile unsigned long *)(LCD_BASE + 0x023C)) 135 #define VIDW4ALPHA1 (*(volatile unsigned long *)(LCD_BASE + 0x0240)) 136 #define BLENDEQ1 (*(volatile unsigned long *)(LCD_BASE + 0x0244)) 137 #define BLENDEQ2 (*(volatile unsigned long *)(LCD_BASE + 0x0248)) 138 #define BLENDEQ3 (*(volatile unsigned long *)(LCD_BASE + 0x024C)) 139 #define BLENDEQ4 (*(volatile unsigned long *)(LCD_BASE + 0x0250)) 140 #define BLENDCON (*(volatile unsigned long *)(LCD_BASE + 0x0260)) 141 #define W0RTQOSCON (*(volatile unsigned long *)(LCD_BASE + 0x0264)) 142 #define W1RTQOSCON (*(volatile unsigned long *)(LCD_BASE + 0x0268)) 143 #define W2RTQOSCON (*(volatile unsigned long *)(LCD_BASE + 0x026C)) 144 #define W3RTQOSCON (*(volatile unsigned long *)(LCD_BASE + 0x0270)) 145 #define W4RTQOSCON (*(volatile unsigned long *)(LCD_BASE + 0x0274)) 146 #define LDI_CMD0 (*(volatile unsigned long *)(LCD_BASE + 0x0280)) 147 #define LDI_CMD1 (*(volatile unsigned long *)(LCD_BASE + 0x0284)) 148 #define LDI_CMD2 (*(volatile unsigned long *)(LCD_BASE + 0x0288)) 149 #define LDI_CMD3 (*(volatile unsigned long *)(LCD_BASE + 0x028C)) 150 #define LDI_CMD4 (*(volatile unsigned long *)(LCD_BASE + 0x0290)) 151 #define LDI_CMD5 (*(volatile unsigned long *)(LCD_BASE + 0x0294)) 152 #define LDI_CMD6 (*(volatile unsigned long *)(LCD_BASE + 0x0298)) 153 #define LDI_CMD7 (*(volatile unsigned long *)(LCD_BASE + 0x029C)) 154 #define LDI_CMD8 (*(volatile unsigned long *)(LCD_BASE + 0x02A0)) 155 #define LDI_CMD9 (*(volatile unsigned long *)(LCD_BASE + 0x02A4)) 156 #define LDI_CMD10 (*(volatile unsigned long *)(LCD_BASE + 0x02A8)) 157 #define LDI_CMD11 (*(volatile unsigned long *)(LCD_BASE + 0x02AC))
寄存器，时序图时间值：
1 gpf0_0 ~ gpf0_7 2 gpf1_0 ~ gpf1_7 3 gpf2_0 ~ gpf2_7 4 gpf3_0 ~ gpf3_3 5 gpd0_1 6 gpx1_2 7 8 vspw + 1 tvpw 10 9 vbpd + 1 tvb - tvpw 13 10 lineval + 1 tvd 480 11 vfpd + 1 tvfp 22 12 13 hspw + 1 thpw 20 14 hbpd + 1 thb - thpw 26 15 hozval + 1 thd 800 16 hfpd + 1 thfp 210 17 18 Frame Rate = 1/[{(VSPW + 1) + (VBPD + 1) + (LIINEVAL + 1) + (VFPD + 1)} * {(HSPW + 1) + ( HBPD + 1) + (HFPD + 1) + (HOZVAL + 1)} * {(CLKVAL + 1)/(Frequency of Clock source)}] 19 20 50 = 1 / [{10 + 13 + 480 + 22} * {20 + 26 + 800 + 210} * X / 800M] 21 50 = 1 / [525 * 1056 * X / 800M] 22 1 = 50 * 525 * 1056 * X / 800M 23 800M = 50 * 525 * 1056 * X 24 X = 800M / (50 * 525 * 1056) 25 X = 800M / 27720000 26 X = 28.8 27 28 29
