S3C2416 LCD裸机配制

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