请教pxa lcd 初始化的问题

本帖最后由 dinglinxiang 于 2010-08-19 19:19 编辑

linux内核pxafb中只提供了对lcd控制器的初始化，但是我这个屏还要对lcd本身进行初始化...哪位大侠知道怎么做不?
就是将下面一段代码翻译到u-boot或linux内核中,看了一些资料，说什么lcd模拟spi，完全不知道怎么下手!!!
主要就是 LCD_CtrlWrite_ILI9325 这个函数怎么实现写lcd驱动ic的寄存器?


void ILI9325
{
// VCI=2.8V
//************* Reset LCD Driver ****************//
LCD_nRESET = 1;
delayms(1); // Delay 1ms
LCD_nRESET = 0;
delayms(10); // Delay 10ms // This delay time is necessary
LCD_nRESET = 1;
delayms(50); // Delay 50 ms
//************* Start Initial Sequence **********//
LCD_CtrlWrite_ILI9325(0x00E3, 0x300; // Set internal timing
LCD_CtrlWrite_ILI9325(0x00E7, 0x0012); // Set internal timing
LCD_CtrlWrite_ILI9325(0x00EF, 0x1231); // Set internal timing
LCD_CtrlWrite_ILI9325(0x0001, 0x0100); // set SS and SM bit
LCD_CtrlWrite_ILI9325(0x0002, 0x0700); // set 1 line inversion
LCD_CtrlWrite_ILI9325(0x0003, 0x1030); // set GRAM write direction and BGR=1.
LCD_CtrlWrite_ILI9325(0x0004, 0x0000); // Resize register
LCD_CtrlWrite_ILI9325(0x0008, 0x0202); // set the back porch and front porch
LCD_CtrlWrite_ILI9325(0x0009, 0x0000); // set non-display area refresh cycle ISC[3:0]
LCD_CtrlWrite_ILI9325(0x000A, 0x0000); // FMARK function
LCD_CtrlWrite_ILI9325(0x000C, 0x0000); // RGB interface setting
LCD_CtrlWrite_ILI9325(0x000D, 0x0000); // Frame marker Position
LCD_CtrlWrite_ILI9325(0x000F, 0x0000); // RGB interface polarity
//*************Power On sequence ****************//
LCD_CtrlWrite_ILI9325(0x0010, 0x0000); // SAP, BT[3:0], AP, DSTB, SLP, STB
LCD_CtrlWrite_ILI9325(0x0011, 0x0007); // DC1[2:0], DC0[2:0], VC[2:0]
LCD_CtrlWrite_ILI9325(0x0012, 0x0000); // VREG1OUT voltage
LCD_CtrlWrite_ILI9325(0x0013, 0x0000); // VDV[4:0] for VCOM amplitude
delayms(200); // Dis-charge capacitor power voltage
LCD_CtrlWrite_ILI9325(0x0010, 0x1290); // SAP, BT[3:0], AP, DSTB, SLP, STB
LCD_CtrlWrite_ILI9325(0x0011, 0x0227); // R11h=0x0221 at VCI=3.3V, DC1[2:0], DC0[2:0], VC[2:0]
delayms(50); // Delay 50ms
LCD_CtrlWrite_ILI9325(0x0012, 0x001A); // External reference voltage= Vci;
delayms(50); // Delay 50ms
LCD_CtrlWrite_ILI9325(0x0013, 0x1600); // R13=0F00 when R12=009E;VDV[4:0] for VCOM amplitude
LCD_CtrlWrite_ILI9325(0x0029, 0x0022); // R29=0019 when R12=009E;VCM[5:0] for VCOMH
LCD_CtrlWrite_ILI9325(0x002B, 0x000C); // Frame Rate
delayms(50); // Delay 50ms
LCD_CtrlWrite_ILI9325(0x0020, 0x0000); // GRAM horizontal Address
LCD_CtrlWrite_ILI9325(0x0021, 0x0000); // GRAM Vertical Address
// ----------- Adjust the Gamma Curve ----------//
LCD_CtrlWrite_ILI9325(0x0030, 0x0000);
LCD_CtrlWrite_ILI9325(0x0031, 0x0302);
LCD_CtrlWrite_ILI9325(0x0032, 0x0202);
LCD_CtrlWrite_ILI9325(0x0035, 0x0103);
LCD_CtrlWrite_ILI9325(0x0036, 0x080C);
LCD_CtrlWrite_ILI9325(0x0037, 0x0505);
LCD_CtrlWrite_ILI9325(0x0038, 0x0504);
LCD_CtrlWrite_ILI9325(0x0039, 0x0707);
LCD_CtrlWrite_ILI9325(0x003C, 0x0301);
LCD_CtrlWrite_ILI9325(0x003D, 0x100;
//------------------ Set GRAM area ---------------//
LCD_CtrlWrite_ILI9325(0x0050, 0x0000); // Horizontal GRAM Start Address
LCD_CtrlWrite_ILI9325(0x0051, 0x00EF); // Horizontal GRAM End Address
LCD_CtrlWrite_ILI9325(0x0052, 0x0000); // Vertical GRAM Start Address
LCD_CtrlWrite_ILI9325(0x0053, 0x013F); // Vertical GRAM Start Address
LCD_CtrlWrite_ILI9325(0x0060, 0xA700); // Gate Scan Line
LCD_CtrlWrite_ILI9325(0x0061, 0x0001); // NDL,VLE, REV
LCD_CtrlWrite_ILI9325(0x006A, 0x0000); // set scrolling line
//-------------- Partial Display Control ---------//
LCD_CtrlWrite_ILI9325(0x0080, 0x0000);
LCD_CtrlWrite_ILI9325(0x0081, 0x0000);
LCD_CtrlWrite_ILI9325(0x0082, 0x0000);
LCD_CtrlWrite_ILI9325(0x0083, 0x0000);
LCD_CtrlWrite_ILI9325(0x0084, 0x0000);
LCD_CtrlWrite_ILI9325(0x0085, 0x0000);
//-------------- Panel Control -------------------//
LCD_CtrlWrite_ILI9325(0x0090, 0x0010);
LCD_CtrlWrite_ILI9325(0x0092, 0x0000);
LCD_CtrlWrite_ILI9325(0x0093, 0x0003);
LCD_CtrlWrite_ILI9325(0x0095, 0x0110);
LCD_CtrlWrite_ILI9325(0x0097, 0x0000);
LCD_CtrlWrite_ILI9325(0x0098, 0x0000);
LCD_CtrlWrite_ILI9325(0x0007, 0x0133); // 262K color and display ON
}


void LCD_ExitSleep_ILI9325(void)
{
//*************Power On sequence ******************//
LCD_CtrlWrite_ILI9325(0x0010, 0x0000); // SAP, BT[3:0], AP, DSTB, SLP
LCD_CtrlWrite_ILI9325(0x0011, 0x0000); // DC1[2:0], DC0[2:0], VC[2:0]
LCD_CtrlWrite_ILI9325(0x0012, 0x0000); // VREG1OUT voltage
LCD_CtrlWrite_ILI9325(0x0013, 0x0000); // VDV[4:0] for VCOM amplitude
delayms(200); // Dis-charge capacitor power voltage
LCD_CtrlWrite_ILI9325(0x0010, 0x1290); // SAP, BT[3:0], AP, DSTB, SLP, STB
LCD_CtrlWrite_ILI9325(0x0011, 0x0227); // R11h=0x0221 at VCI=3.3V DC1[2:0], DC0[2:0], VC[2:0]
delayms(50); // Delay 50ms
LCD_CtrlWrite_ILI9325(0x0012, 0x001A); // External reference voltage =Vci;
delayms(50); // Delay 50ms
LCD_CtrlWrite_ILI9325(0x0013, 0x1600); // R13h=0x0F00 when R12=009E VDV[4:0] for VCOM amplitude
LCD_CtrlWrite_ILI9325(0x0029, 0x0022); // R29h=0x000C when R12=009E VCM[5:0] for VCOMH
delayms(50); // Delay 50ms
LCD_CtrlWrite_ILI9325(0x0007, 0x0133); // 262K color and display ON
}


void LCD_EnterSleep_ILI9325(void)
{
LCD_CtrlWrite_ILI9325(0x0007, 0x0000); // display OFF
//************* Power OFF sequence **************//
LCD_CtrlWrite_ILI9325(0x0010, 0x0080); // SAP, BT[3:0], APE, AP, DSTB, SLP
LCD_CtrlWrite_ILI9325(0x0011, 0x0000); // DC1[2:0], DC0[2:0], VC[2:0]
LCD_CtrlWrite_ILI9325(0x0012, 0x0000); // VREG1OUT voltage
LCD_CtrlWrite_ILI9325(0x0013, 0x0000); // VDV[4:0] for VCOM amplitude
delayms(200); // Dis-charge capacitor power voltage
LCD_CtrlWrite_ILI9325(0x0010, 0x0082); // SAP, BT[3:0], APE, AP, DSTB, SLP
}

自己顶~~~~~~~~~~~~~~~~~

ILI9325 接口
1. i80 system interface with 8-/9-/16-/18-bit bus width
2. VSYNC interface (system interface + VSYNC)
3. Serial peripheral interface (SPI)
4. RGB interface with 6-/16-/18-bit bus width

问问你们硬件工程师ILI9325的SPI接口是怎么接到PXA上的？另外3个接口是挂PXA LCD Controller的
估计是PXA几个GPIO口模拟出来的，然后通过操作这几个GPIO口访问ILI9325的SPI接口以访问ILI9325的内部寄存器。至于ILI9325内部寄存器访问逻辑仔细看看ILI9325 datasheet吧。