S3C2416 LCD裸机配制

灰太狼 2022-09-17 06:15 62阅读 0赞

最近在调S3C2416的裸机驱动，下面将LCD部分贴出来，供大家参考

文件名:lcd.c

背光控制:TOUT0，这里是直接用IO控制了。

这里使用的是7寸屏800\*480

显存地址:0x33b00000

图片文件是用Image2Lcd工具生成的，色彩16位.

#include "include.h"
    
    #define CFG_HIGH	1
    #define CFG_LOW		0
    
    #define		HCLK	66000000
    
    #define PIXELBITS	16
    
    #define IVCLK		CFG_LOW
    #define IHSYNC		CFG_HIGH
    #define	IVSYNC		CFG_HIGH
    #define IVDEN		CFG_LOW
    
    static uint8 HFP	=0;
    static uint8 HSW	=0;
    static uint8 HBP	=0;
    static uint8 VFP	=0;
    static uint8 VSW	=0;
    static uint8 VBP	=0;
    static uint16 HRES	=0;
    static uint16 VRES	=0;
    static uint8 CLKVAL	=20;
    
    extern unsigned char gImage_one[];
    extern unsigned char gImage_two[];
    extern unsigned char gImage_three[];
    
    #define HRES_VIRTUAL	HRES
    #define VRES_VIRTUAL	VRES*2
    
    #define LCD_FRAMEBUFFER 0xc3b00000
    
    
    ulong virt_to_phy_gzsd2416(ulong addr)
    {
    	if((0xC0000000 <= addr) && (addr < 0xC4000000))
    		return (addr - 0xC0000000 + 0x30000000);
    	else
    		return addr;
    }
    
    
    #define CONFIG_ENABLE_MMU
    #ifdef CONFIG_ENABLE_MMU
    #define virt_to_phys(x)	virt_to_phy_gzsd2416(x)
    #else
    #define virt_to_phys(x)	x
    #endif
    
    
    static int gzsd_lcd_ctrl_init(void *lcdbase)
    {
    	ulong freq_lcdclk;
    	ulong freq_Hclk;
    	ulong fb_size;
    	uint8 nn;
    	uint16 *pp;
    	int i;
    	
    	rGPCCON = 0xaaaa02aa;
    	rGPCUDP = 0xaaaa02aa;
    	rGPDCON = 0xaaaaaaaa;
    	rGPDUDP = 0xaaaaaaaa;
    	
    	lcd_enable(0);
    	
    	rWINCON0 &= ~WINCONx_ENWIN_F_ENABLE;
    	rWINCON1 &= ~WINCONx_ENWIN_F_ENABLE;
    
    	rVIDCON0 = (VIDCON0_S_RGB_IF)|(VIDCON0_S_RGB_PAR)|(VIDCON0_S_VCLK_GATING_OFF)
    			|(VIDCON0_S_CLKDIR_DIVIDED)|(VIDCON0_S_CLKSEL_HCLK)|VIDCON0_CLKVAL_F(CLKVAL);
    			
    	rVIDCON1 = (VIDCON1_S_HSYNC_INVERTED)|(VIDCON1_S_VSYNC_INVERTED);
    	
    	rVIDTCON0 = VIDTCON0_VBPD(VBP-1)|VIDTCON0_VFPD(VFP-1)|VIDTCON0_VSPW(VSW-1);
    	
    	rVIDTCON1 = VIDTCON1_HBPD(HBP-1)|VIDTCON1_HFPD(HFP-1)|VIDTCON1_HSPW(HSW-1);
    	
    	rVIDTCON2 = VIDTCON2_LINEVAL(VRES-1)|VIDTCON2_HOZVAL(HRES-1);
    	
    	rWINCON0 = WINCONx_BPPMODE_F_16BPP_565;
    	rWINCON1 = WINCONx_BPPMODE_F_16BPP_565;
    	
    	rVIDOSD0A = VIDOSDxA_OSD_LTX_F(0)|VIDOSDxA_OSD_LTY_F(0);
    	
    	rVIDOSD0B = VIDOSDxB_OSD_RBX_F(HRES-1)|VIDOSDxB_OSD_RBY_F(VRES-1);
    	
    	rVIDOSD1A = VIDOSDxA_OSD_LTX_F(0)|VIDOSDxA_OSD_LTY_F(0);
    	
    	rVIDOSD1B = VIDOSDxB_OSD_RBX_F(HRES-1)|VIDOSDxB_OSD_RBY_F(VRES-1);
    	
    	rVIDOSD1C = 0x0;
    	
    	fb_size = HRES*VRES*2;
    	
    	rVIDW00ADD0B0 = virt_to_phys((ulong)lcdbase);
    	
    	rVIDW00ADD1B0 = virt_to_phys((ulong)(lcdbase) + fb_size);
    	
    	rVIDW00ADD2B0 = VIDWxADD2_OFFSIZE_F(0)|VIDWxADD2_PAGEWIDTH_F(HRES*2);
    	
    	lcd_enable(1);
    	rWINCON0 |= WINCONx_ENWIN_F_ENABLE;
    	rWINCON1 |= WINCONx_ENWIN_F_ENABLE;
    	
    	return 0;
    	
    }
    
    void lcd_enable(int enable)
    {
    	if(enable)
    		rVIDCON0 |= (VIDCON0_ENVID_ENABLE | VIDCON0_ENVID_F_ENABLE);
    	else
    		rVIDCON0 &= ~(VIDCON0_ENVID_ENABLE | VIDCON0_ENVID_F_ENABLE);
    }
    
    void gzsd_drv_lcd_init(void)
    {
    	void *lcd_base;
    	lcd_base = (void*)LCD_FRAMEBUFFER;
    	gzsd_lcd_ctrl_init(lcd_base);
    }
    
    void lcd_backlight(int onoff)
    {
    	rGPBCON &= ~(0x3 << 0);
    	rGPBCON |= (0x1 << 0);
    
    	if(onoff)
    		rGPBDAT |= (0x1 << 0);
    	else
    		rGPBDAT &= ~(0x1 << 0);
    }
    
    void lcd_init(void)
    {
    	VBP = 15;
    	VSW = 5;
    	VFP = 5;
    	
    	HBP = 25;
    	HSW = 20;
    	HFP = 88;
    	
    	CLKVAL = 0;
    	
    	HRES = 800;
    	VRES = 480;
    	
    	gzsd_drv_lcd_init();
    	lcd_backlight(1);
    }
    
    void lcd_test()
    {
    	uint16 *pFB;
    	int i;
    	
    	pFB = (unsigned short *)LCD_FRAMEBUFFER;
    	for (i=0; i<HRES*VRES; i++)
    	{
    		*pFB++ = 0x001f;		// Blue
    	}
    }
    
    
    void lcd_bmp(void)
    {
    	uint16 *pFB;
    	
    	pFB = (unsigned short *)LCD_FRAMEBUFFER;
    	while(1)
    	{
    		memcpy(pFB,gImage_one,800*480*2);
    		delay(1000);
    		memcpy(pFB,gImage_two,800*480*2);
    		delay(1000);
    		memcpy(pFB,gImage_three,800*480*2);
    		delay(1000);
    	}
    }

主函数调用lcd\_init进行初始化，调用lcd\_bmp显示图片.

处理器：ARMCLK=400M,HCLK=66M,PCLK=33M.这里改成其它频率后就跑不起来了，正在郁闷中。

理论上应该是ARMCLK=400M,HCLK=133M,PCLK=33M.如果哪位高手有调试好的，请指点下我