eboot中的main.c中的InitLDI_LTV350和Write_LDI_LTV350起什么作用的？

穆特兰舍 · 发表于2008-11-26 18:47

eboot中的main.c中的InitLDI_LTV350和Write_LDI_LTV350起什么作用的？ [复制链接]

SMDK2450 FMD版的：

InitDisplay里的代码：

#elif (BSP_TYPE == BSP_SMDK2450)
void Delay(void)
{
volatile int i;
for(i=0 ; i < 1000 ; i++)
{
}
}
static void InitDisplay(void)
{
UINT8 pagewidth_in_byte=0,offsize_in_byte=0;
volatile S3C2450_IOPORT_REG *s2450IOP = (S3C2450_IOPORT_REG *)OALPAtoVA(S3C2450_BASE_REG_PA_IOPORT, FALSE);
volatile S3C2450_LCD_REG *s2450LCD = (S3C2450_LCD_REG *)OALPAtoVA(S3C2450_BASE_REG_PA_LCD, FALSE);
volatile S3C2450_INTR_REG *s2450INTR = (S3C2450_INTR_REG *)OALPAtoVA(S3C2450_BASE_REG_PA_INTR, FALSE);
UINT8 clkval=0;
UINT16 hsync_cnt,vclk_cnt;
UINT16 lcd_horizon_value,lcd_line_value;
UINT8 lcd_vbpd,lcd_vfpd,lcd_vspw,lcd_hbpd,lcd_hfpd,lcd_hspw;
UINT8 lcd_frame_rate;
int i;
unsigned short *pFB;
// Set up the LCD controller registers to display a power-on bitmap image.
//
s2450IOP->MISCCR |= (1<<28); // select LCD controller for TFT lcd controller
s2450IOP->GPCUDP = 0xFFFFFFFF;
s2450IOP->GPCCON = 0xAAAAAAAA;
s2450IOP->GPDUDP = 0xFFFFFFFF;
s2450IOP->GPDCON = 0xAAAAAAAA;
s2450IOP->GPLCON = s2450IOP->GPLCON & ~(0x3ff<<20) | (0x1<< 28) | (0x1<< 26) | (0x1<< 24) | (0x1<< 22) | (0x1<< 20);
s2450IOP->GPLDAT |= (0x1f<<10);
s2450IOP->GPBUDP &= ~0x3;
s2450IOP->GPBCON = (s2450IOP->GPBCON & ~((3<<6)|(3<<2)|(3<<0))) | ((1<<6)|(1<<2)|(1<<0)); // Backlight Pwm control
s2450IOP->GPBDAT |=((1<<0) |(1<<3));
s2450IOP->GPBDAT &= ~(1<<1);
#if (LCD_MODULE_TYPE == LCD_MODULE_LTE480WV)
// s2450IOP->GPFCON = (s2450IOP->GPFCON & ~(3<<4)) |(1<<4);
// s2450IOP->GPFDAT = (s2450IOP->GPFDAT & ~(1<<2)); // make low
lcd_horizon_value = LTE480_HOZVAL;
lcd_line_value = LTE480_LINEVAL;
lcd_vbpd = LTE480_VBPD;
lcd_vfpd = LTE480_VFPD;
lcd_vspw = LTE480_VSPW;
lcd_hbpd = LTE480_HBPD;
lcd_hfpd = LTE480_HFPD;
lcd_hspw = LTE480_HSPW;
lcd_frame_rate = LTE480_FRAME_RATE;
InitLDI_LTE480();
#elif (LCD_MODULE_TYPE == LCD_MODULE_LTV350)
lcd_horizon_value = LTV350_HOZVAL;
lcd_line_value = LTV350_LINEVAL;
lcd_vbpd = LTV350_VBPD;
lcd_vfpd = LTV350_VFPD;
lcd_vspw = LTV350_VSPW;
lcd_hbpd = LTV350_HBPD;
lcd_hfpd = LTV350_HFPD;
lcd_hspw = LTV350_HSPW;
lcd_frame_rate = LTV350_FRAME_RATE;
InitLDI_LTV350();
#endif
pagewidth_in_byte = lcd_horizon_value/8*16;
offsize_in_byte = 0;
//LcdWindowOnOff(LCD_WIN_ALL,LCD_OFF);
s2450LCD->WINCON0 &= ~0x01;
s2450LCD->WINCON1 &= ~0x01;
//LcdEnvidOnOff(LCD_OFF);
s2450LCD->VIDCON0 &= (~3); // ENVID Off using Per Frame method
//Basic_Display_Setting(window,WINCONx_16BPP_565,lcd_horizon_value,0);
s2450LCD->VIDCON0 = VIDCON0_S_RGB_IF|VIDCON0_S_RGB_PAR|VIDCON0_S_VCLK_GATING_OFF|VIDCON0_S_CLKDIR_DIVIDED|VIDCON0_S_CLKSEL_HCLK;
hsync_cnt = (lcd_vbpd+lcd_vfpd+lcd_vspw+lcd_line_value);
vclk_cnt = (lcd_hbpd+lcd_hfpd+lcd_hspw+lcd_horizon_value);
clkval = (UINT8)(((float)S3C2450_HCLK/(float)(hsync_cnt*vclk_cnt*lcd_frame_rate*2))+0.5)-1;
s2450LCD->VIDCON0 |= (clkval <
s2450LCD->VIDCON1 = VIDCON1_S_HSYNC_INVERTED|VIDCON1_S_VSYNC_INVERTED;
s2450LCD->VIDTCON0=((lcd_vbpd-1)<
s2450LCD->VIDTCON1=((lcd_hbpd-1)<
s2450LCD->VIDTCON2 = ((lcd_line_value-1)<
s2450LCD->WINCON0 = (0<
s2450LCD->VIDOSD0A = (0<
s2450LCD->VIDOSD0B = ((lcd_horizon_value-1)<
s2450LCD->VIDW00ADD0B0 = (UINT32)IMAGE_FRAMEBUFFER_DMA_BASE;
// buffer end address
s2450LCD->VIDW00ADD1B0 = (UINT32)IMAGE_FRAMEBUFFER_DMA_BASE + (LCD_WIDTH*LCD_HEIGHT*2);
// buffer size
s2450LCD->VIDW00ADD2B0 = (offsize_in_byte<
s2450LCD->WINCON0 |= (1<
//*WxKEYCON0_Reg_Addr[win_num] = 0;
//*WINxMAP_Reg_Addr[win_num] = 0;
s2450LCD->WINCON0 |= 0x1;
s2450LCD->VIDCON0 |= 0x3;
s2450INTR->INTSUBMSK |= (0xf << IRQ_SUB_LCD1); // MASK all LCD Sub Interrupt
if( LCD_MODULE_TYPE == LCD_MODULE_LTV350){
memcpy((void *)IMAGE_FRAMEBUFFER_UA_BASE, prayer16bpp, LCD_ARRAY_SIZE_TFT_16BIT);
}
else if(LCD_MODULE_TYPE == LCD_MODULE_LTE480WV){
pFB = (unsigned short *)IMAGE_FRAMEBUFFER_UA_BASE;
for (i=0; i
*pFB++ = 0x001F; // Blue
}
}
#endif

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jinzling · 发表于2008-11-26 18:50

InitLDI_LTV350函数：

#define LTV350 (TRUE)
void InitLDI_LTV350(void)
{
volatile S3C2450_IOPORT_REG *s2450IOP = (S3C2450_IOPORT_REG *)OALPAtoVA(S3C2450_BASE_REG_PA_IOPORT, FALSE);
volatile S3C2450_LCD_REG *s2450LCD = (S3C2450_LCD_REG *)OALPAtoVA(S3C2450_BASE_REG_PA_LCD, FALSE);
volatile S3C2450_CLKPWR_REG *s2450PWR = (S3C2450_CLKPWR_REG *)OALPAtoVA(S3C2450_BASE_REG_PA_CLOCK_POWER, FALSE);
// enable EPLL CLOCK for LCD
s2450PWR->SCLKCON |= (1<<10);
// LCD module reset
s2450IOP->GPBDAT |= (1<<(LCD_nRESET));
s2450IOP->GPBDAT &= ~(1<<(LCD_nRESET)); // goes to LOW
// delay about 5ms
delayLoop(LCD_DELAY_1MS*10);
s2450IOP->GPBDAT |= (1<<(LCD_nRESET)); // goes to HIGH
//SET_CONFIG_PORT( spi1)
s2450IOP->GPLCON &= ~(((3<<(LCD_DEN_BIT*2))) | ((3<<(LCD_DCLK_BIT*2))) | ((3<<(LCD_DSERI_BIT*2))));
s2450IOP->GPLCON |= (((1<<(LCD_DEN_BIT*2))) | ((1<<(LCD_DCLK_BIT*2))) | ((1<<(LCD_DSERI_BIT*2))));
// pull-up pull-down disable
s2450IOP->GPLUDP &= ~(((3<<(LCD_DEN_BIT*2))) | ((3<<(LCD_DCLK_BIT*2))) | ((3<<(LCD_DSERI_BIT*2))));
s2450IOP->GPLUDP |= (((1<<(LCD_DEN_BIT*2))) | ((1<<(LCD_DCLK_BIT*2))) | ((1<<(LCD_DSERI_BIT*2))));
// delay about 5ms
delayLoop(LCD_DELAY_1MS*10);
LCD_DEN_Hi;
LCD_DCLK_Hi;
LCD_DSERI_Hi;
///////////////////////////////////////////////////////////////////
// Init_Lcd_Function
//////////////////////////////////////////////////////////////////
#if LTV350
Write_LDI_LTV350(0x01,0x001d);
Write_LDI_LTV350(0x02,0x0000);
Write_LDI_LTV350(0x03,0x0000);
Write_LDI_LTV350(0x04,0x0000);
Write_LDI_LTV350(0x05,0x50a3);
Write_LDI_LTV350(0x06,0x0000);
Write_LDI_LTV350(0x07,0x0000);
Write_LDI_LTV350(0x08,0x0000);
Write_LDI_LTV350(0x09,0x0000);
Write_LDI_LTV350(0x0a,0x0000);
Write_LDI_LTV350(0x10,0x0000);
Write_LDI_LTV350(0x11,0x0000);
Write_LDI_LTV350(0x12,0x0000);
Write_LDI_LTV350(0x13,0x0000);
Write_LDI_LTV350(0x14,0x0000);
Write_LDI_LTV350(0x15,0x0000);
Write_LDI_LTV350(0x16,0x0000);
Write_LDI_LTV350(0x17,0x0000);
Write_LDI_LTV350(0x18,0x0000);
Write_LDI_LTV350(0x19,0x0000);
#else
Write_LDI_LTV350(0x09,0x0000);
#endif
///////////////////////////////////////////////////////////////////
// Power On Reset Display off State
//////////////////////////////////////////////////////////////////
//Write_LDI_LTV350(0x09,0x0000);
// delay about 10ms
delayLoop(LCD_DELAY_1MS*10);
///////////////////////////////////////////////////////////////////
// Power Setting Function 1
//////////////////////////////////////////////////////////////////
#if LTV350
Write_LDI_LTV350(0x09,0x4055);
Write_LDI_LTV350(0x0a,0x0000);
#else
Write_LDI_LTV350(0x09,0x4055);
Write_LDI_LTV350(0x0a,0x2000);
#endif
// delay about 10ms
delayLoop(LCD_DELAY_1MS*10);
/////////////////////////////////////////////////////////////////////
// Power Setting 2
/////////////////////////////////////////////////////////////////////
#if LTV350
Write_LDI_LTV350(0x0a,0x2000);
#else
Write_LDI_LTV350(0x09,0x4055);
#endif
// delay about 50ms
delayLoop(LCD_DELAY_1MS*50);
///////////////////////////////////////////////////////////////////
// Instruction Setting
///////////////////////////////////////////////////////////////////
#if LTV350
Write_LDI_LTV350(0x01,0x409d);
Write_LDI_LTV350(0x02,0x0204);
Write_LDI_LTV350(0x03,0x2100);
Write_LDI_LTV350(0x04,0x1000);
Write_LDI_LTV350(0x05,0x5003);
Write_LDI_LTV350(0x06,0x0009); //vbp
Write_LDI_LTV350(0x07,0x000f); //hbp
Write_LDI_LTV350(0x08,0x0800);
Write_LDI_LTV350(0x10,0x0000);
Write_LDI_LTV350(0x11,0x0000);
Write_LDI_LTV350(0x12,0x000f);
Write_LDI_LTV350(0x13,0x1f00);
Write_LDI_LTV350(0x14,0x0000);
Write_LDI_LTV350(0x15,0x0000);
Write_LDI_LTV350(0x16,0x0000);
Write_LDI_LTV350(0x17,0x0000);
Write_LDI_LTV350(0x18,0x0000);
Write_LDI_LTV350(0x19,0x0000);
#else
Write_LDI_LTV350(0x01,0x409d);
Write_LDI_LTV350(0x02,0x0204);
Write_LDI_LTV350(0x03,0x0100);
Write_LDI_LTV350(0x04,0x3000);
Write_LDI_LTV350(0x05,0x4003);
Write_LDI_LTV350(0x06,0x0009); //vbp
Write_LDI_LTV350(0x07,0x000f); //hbp
Write_LDI_LTV350(0x08,0x0c00);
Write_LDI_LTV350(0x10,0x0103);
Write_LDI_LTV350(0x11,0x0301);
Write_LDI_LTV350(0x12,0x1f0f);
Write_LDI_LTV350(0x13,0x1f0f);
Write_LDI_LTV350(0x14,0x0707);
Write_LDI_LTV350(0x15,0x0307);
Write_LDI_LTV350(0x16,0x0707);
Write_LDI_LTV350(0x17,0x0000);
Write_LDI_LTV350(0x18,0x0004);
Write_LDI_LTV350(0x19,0x0000);
#endif
// delay about 2 frames
delayLoop(LCD_DELAY_1MS*50);
///////////////////////////////////////////////////////////////////
// Display On Sequence
///////////////////////////////////////////////////////////////////
#if LTV350
Write_LDI_LTV350(0x09,0x4a55);
Write_LDI_LTV350(0x0a,0x2000);
#else
Write_LDI_LTV350(0x09,0x4a55);
Write_LDI_LTV350(0x05,0x5003);
#endif
}

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wq88143990 · 发表于2008-11-26 18:52

Write_LDI_LTV350 函数：

void Write_LDI_LTV350(int address, int data)
{
volatile S3C2450_IOPORT_REG *s2450IOP = (S3C2450_IOPORT_REG *)OALPAtoVA(S3C2450_BASE_REG_PA_IOPORT, FALSE);
volatile S3C2450_LCD_REG *s2450LCD = (S3C2450_LCD_REG *)OALPAtoVA(S3C2450_BASE_REG_PA_LCD, FALSE);
UINT8 dev_id_code=0x1D;
int j;
unsigned char DELAY=50;
LCD_DEN_Hi; // EN = High CS high
LCD_DCLK_Hi; // SCL High
LCD_DSERI_Hi; // Data Low
delayLoop(DELAY);
LCD_DEN_Lo; // EN = Low CS Low
delayLoop(DELAY);
for (j = 5; j >= 0; j--)
{
LCD_DCLK_Lo; // SCL Low
if ((dev_id_code >> j) & 0x0001) // DATA HIGH or LOW
{
LCD_DSERI_Hi;
}
else
{
LCD_DSERI_Lo;
}
delayLoop(DELAY);
LCD_DCLK_Hi; // CLOCK = High
delayLoop(DELAY);
}
// RS = "0" : index data
LCD_DCLK_Lo; // CLOCK = Low
LCD_DSERI_Lo;
delayLoop(DELAY);
LCD_DCLK_Hi; // CLOCK = High
delayLoop(DELAY);
// Write
LCD_DCLK_Lo; // CLOCK = Low
LCD_DSERI_Lo;
delayLoop(DELAY);
LCD_DCLK_Hi; // CLOCK = High
delayLoop(DELAY);
for (j = 15; j >= 0; j--)
{
LCD_DCLK_Lo; // SCL Low
if ((address >> j) & 0x0001) // DATA HIGH or LOW
{
LCD_DSERI_Hi;
}
else
{
LCD_DSERI_Lo;
}
delayLoop(DELAY);
LCD_DCLK_Hi; // CLOCK = High
delayLoop(DELAY);
}
LCD_DSERI_Hi;
delayLoop(DELAY);
LCD_DEN_Hi; // EN = High
delayLoop(DELAY*10);
LCD_DEN_Lo; // EN = Low CS Low
delayLoop(DELAY);
for (j = 5; j >= 0; j--)
{
LCD_DCLK_Lo; // SCL Low
if ((dev_id_code >> j) & 0x0001) // DATA HIGH or LOW
{
LCD_DSERI_Hi;
}
else
{
LCD_DSERI_Lo;
}
delayLoop(DELAY);
LCD_DCLK_Hi; // CLOCK = High
delayLoop(DELAY);
}
// RS = "1" instruction data
LCD_DCLK_Lo; // CLOCK = Low
LCD_DSERI_Hi;
delayLoop(DELAY);
LCD_DCLK_Hi; // CLOCK = High
delayLoop(DELAY);
// Write
LCD_DCLK_Lo; // CLOCK = Low
LCD_DSERI_Lo;
delayLoop(DELAY);
LCD_DCLK_Hi; // CLOCK = High
delayLoop(DELAY);
for (j = 15; j >= 0; j--)
{
LCD_DCLK_Lo; // SCL Low
if ((data >> j) & 0x0001) // DATA HIGH or LOW
{
LCD_DSERI_Hi;
}
else
{
LCD_DSERI_Lo;
}
delayLoop(DELAY);
LCD_DCLK_Hi; // CLOCK = High
delayLoop(DELAY);
}
LCD_DEN_Hi; // EN = High
delayLoop(DELAY);
}

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candela · 发表于2008-11-26 19:05

初始化lcd, LTV350是三星的一种320x240屏

mayingchen · 发表于2008-11-26 19:22

初始化屏的啊

blsky112 · 发表于2008-11-26 20:58

初始化屏，我也知道啊。
现在我自己查了下，有人好像说，这些代码是来初始化SPI的。至于怎么初始化法，我没看懂哦，希望有人可以点拨一下。
特别是：

Write_LDI_LTV350(0x01,0x001d);
Write_LDI_LTV350(0x02,0x0000);
Write_LDI_LTV350(0x03,0x0000);
Write_LDI_LTV350(0x04,0x0000);
Write_LDI_LTV350(0x05,0x50a3);
Write_LDI_LTV350(0x06,0x0000);
Write_LDI_LTV350(0x07,0x0000);
Write_LDI_LTV350(0x08,0x0000);
Write_LDI_LTV350(0x09,0x0000);
Write_LDI_LTV350(0x0a,0x0000);
Write_LDI_LTV350(0x10,0x0000);
Write_LDI_LTV350(0x11,0x0000);
Write_LDI_LTV350(0x12,0x0000);
Write_LDI_LTV350(0x13,0x0000);
Write_LDI_LTV350(0x14,0x0000);
Write_LDI_LTV350(0x15,0x0000);
Write_LDI_LTV350(0x16,0x0000);
Write_LDI_LTV350(0x17,0x0000);
Write_LDI_LTV350(0x18,0x0000);
Write_LDI_LTV350(0x19,0x0000);

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这些代码是干什么用，为什么要这样设？
现在我怀疑我的群创3.5寸的，PT035TN01屏显示不正常，就是SPI没有初始化好。。。

mikerain · 发表于2008-11-26 22:28

我现在天天看这些代码，从来没有想过他们的作用，呵呵。。。。。

tmasd · 发表于2008-11-27 09:24

引用 6 楼 Seven_zhangxw 的回复:
我现在天天看这些代码，从来没有想过他们的作用，呵呵。。。。。

个人理解，LCD的设置，其实就是对I/O口配置好，LCD寄存器配置好，剩下的就是一些SPI等时钟频率等一些的初始化，现在我觉得前两个没什么大问题了，感觉就剩第三个有疑问了。

seadistant · 发表于2008-11-27 10:00

为什么要那么设，这个是和LCD的controler IC有关系的。你用的LCD，内部是有一个控制IC的，它的一些寄存器需要在上电的时候设置好。

linliuh · 发表于2008-11-27 11:25

引用 8 楼 yashi 的回复:
为什么要那么设，这个是和LCD的controler IC有关系的。你用的LCD，内部是有一个控制IC的，它的一些寄存器需要在上电的时候设置好。

这个是分析出来的，因为看了一下LCD的Datasheet，最后部分标明了通过这种方式来选择屏的使用模式，我要用最后一种cdh:24 bit RGB Mode (DE mode) 。

Note: 3-Wire Control Registers List
3-Wire Register Register Description
D[15:10] Name Init R/W Function Description
000000b R00 03h R/W System control register
000001b R01 40h R/W Timing controller function register
000010b R02 11h R/W Operation control register
000011b R03 (cch)* R/W Input data format control register
000100b R04 93h R/W Source Timing delay control register
000101b R05 12h R/W Gate Timing delay control register
000111b R07 03h R/W Internal function control register
001000b R08 08h R/W RGB contrast control register
001001b R09 40h R/W RGB brightness control register
001010b R0A 88h R/W Hue/Saturation control register
001011b R0B 88h R/W R/B Sub-contrast control register
001100b R0C 20h R/W R Sub-brightness control register
001101b R0D 20h R/W B Sub-brightness control register
* Note: c4h:ITU-R BT 656 Mode
c2h:ITU-R BT 601 Mode
c8h:8 bit RGB Mode(HV Mode)
c9h:8 bit RGB Mode(DE Mode)
cch:24 bit RGB Mode (HV mode)
cdh:24 bit RGB Mode (DE mode)

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zyhahk · 发表于2008-11-27 13:02

ltv350屏需要初始化内部寄存器，所以用gpio模拟spi负责初始化。如果你的屏不需要初始化内部寄存器可以把这些去掉

傻傻天子 · 发表于2008-11-27 13:54

引用 10 楼 laozei000 的回复:
ltv350屏需要初始化内部寄存器，所以用gpio模拟spi负责初始化。如果你的屏不需要初始化内部寄存器可以把这些去掉

明白了一些了，正在努力调试中。

eboot中的main.c中的InitLDI_LTV350和Write_LDI_LTV350起什么作用的？ [复制链接]

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