模板:32inch-TOUCH-LCD-FAQ

问题： 该LCD的提供哪些电源参数？

答复： LCD供电电压：2.5V~3.3V 背光供电电压：4.5V~5V 平均背光工作电流：150mA 平均LCD面板工作电流：15mA

问题： 该LCD可以接排线延迟吗？

答复： 可以，但延长线不能超过100mm，否则可能会导致通信失败。

问题： 3.2inch 320x240 Touch LCD (C)这个和旧型号的3.2inch 320x240 Touch LCD (A) 有什么区别

答复： 【相同点】： 接口一致，分辨率一致。 【区别】： 3.2inch 320x240 Touch LCD (A) LCD控制芯片SSD1289 3.2inch 320x240 Touch LCD (C) LCD控制芯片ILI9325

问题： 我之前是用3.2inch 320x240 Touch LCD (A)的，现在要采购，要怎么办？

答复： 您好，A的已经停产了，您可以购买C型3.2inch 320x240 Touch LCD (C)这款，接口是兼容的。另外需要下载新版的示例程序资料，修改您现有的程序即可。

问题： LCD显示效果异常？

答复： 可能是初始化代码有问题，打开工程，用以下代码覆盖试试（如果是不同硬件平台的代码，可能需要作相应的修改） if( DeviceCode == 0x9325 || DeviceCode == 0x9328 ) { LCD_Code = ILI9325; LCD_WriteReg(0xE5, 0x78F0); /* set SRAM internal timing */ LCD_WriteReg(0x01, 0x0100); /* set Driver Output Control */ LCD_WriteReg(0x02, 0x0700); /* set 1 line inversion */ LCD_WriteReg(0x03, 0x1030); /* set GRAM write direction and BGR=1 */ LCD_WriteReg(0x04, 0x0000); /* Resize register */ LCD_WriteReg(0x08, 0x0207); /* set the back porch and front porch */ LCD_WriteReg(0x09, 0x0000); /* set non-display area refresh cycle ISC[3:0] */ LCD_WriteReg(0x0A, 0x0000); /* FMARK function */ LCD_WriteReg(0x0C, 0x0000); /* RGB interface setting */ LCD_WriteReg(0x0D, 0x0000); /* Frame marker Position */ LCD_WriteReg(0x0F, 0x0000); /* RGB interface polarity */ /*************Power On sequence ****************/ LCD_WriteReg(0x10, 0x0000); /* SAP, BT[3:0], AP, DSTB, SLP, STB */ LCD_WriteReg(0x11, 0x0007); /* DC1[2:0], DC0[2:0], VC[2:0] */ LCD_WriteReg(0x12, 0x0000); /* VREG1OUT voltage */ LCD_WriteReg(0x13, 0x0000); /* VDV[4:0] for VCOM amplitude */ LCD_WriteReg(0x07, 0x0001); delay_ms(200); /* Dis-charge capacitor power voltage */ LCD_WriteReg(0x10, 0x1090); /* SAP, BT[3:0], AP, DSTB, SLP, STB */ LCD_WriteReg(0x11, 0x0227); /* Set DC1[2:0], DC0[2:0], VC[2:0] */ delay_ms(50); /* Delay 50ms */ LCD_WriteReg(0x12, 0x001F); delay_ms(50); /* Delay 50ms */ LCD_WriteReg(0x13, 0x1500); /* VDV[4:0] for VCOM amplitude */ LCD_WriteReg(0x29, 0x0027); /* 04 VCM[5:0] for VCOMH */ LCD_WriteReg(0x2B, 0x000D); /* Set Frame Rate */ delay_ms(50); /* Delay 50ms */ LCD_WriteReg(0x20, 0x0000); /* GRAM horizontal Address */ LCD_WriteReg(0x21, 0x0000); /* GRAM Vertical Address */ /* ----------- Adjust the Gamma Curve ---------- */ #if 1 //不同批次Gamma值可能有一定差异，以下提供了我们常用的3组参数作为参考 LCD_WriteReg(0x30, 0x0000); LCD_WriteReg(0x31, 0x0603); LCD_WriteReg(0x32, 0x0206); LCD_WriteReg(0x35, 0x0206); LCD_WriteReg(0x36, 0x0004); LCD_WriteReg(0x37, 0x0105); LCD_WriteReg(0x38, 0x0401); LCD_WriteReg(0x39, 0x0707); LCD_WriteReg(0x3C, 0x0602); LCD_WriteReg(0x3D, 0x0004); #endif #if 0 LCD_WriteReg(0x30, 0x0000); LCD_WriteReg(0x31, 0x0707); LCD_WriteReg(0x32, 0x0307); LCD_WriteReg(0x35, 0x0200); LCD_WriteReg(0x36, 0x0008); LCD_WriteReg(0x37, 0x0004); LCD_WriteReg(0x38, 0x0000); LCD_WriteReg(0x39, 0x0707); LCD_WriteReg(0x3C, 0x0002); LCD_WriteReg(0x3D, 0x1D04); #endif #if 0 LCD_WriteReg(0x30,0x0007); LCD_WriteReg(0x31,0x0707); LCD_WriteReg(0x32,0x0006); LCD_WriteReg(0x35,0x0704); LCD_WriteReg(0x36,0x1f04); LCD_WriteReg(0x37,0x0004); LCD_WriteReg(0x38,0x0000); LCD_WriteReg(0x39,0x0706); LCD_WriteReg(0x3c,0x0701); LCD_WriteReg(0x3d,0x000f); #endif /* ------------------ Set GRAM area --------------- */ LCD_WriteReg(0x50, 0x0000); /* Horizontal GRAM Start Address */ LCD_WriteReg(0x51, 0x00EF); /* Horizontal GRAM End Address */ LCD_WriteReg(0x52, 0x0000); /* Vertical GRAM Start Address */ LCD_WriteReg(0x53, 0x013F); /* Vertical GRAM Start Address */ LCD_WriteReg(0x60, 0xA700); /* Gate Scan Line */ LCD_WriteReg(0x61, 0x0001); /* NDL,VLE, REV */ LCD_WriteReg(0x6A, 0x0000); /* set scrolling line */ /* -------------- Partial Display Control --------- */ LCD_WriteReg(0x80, 0x0000); LCD_WriteReg(0x81, 0x0000); LCD_WriteReg(0x82, 0x0000); LCD_WriteReg(0x83, 0x0000); LCD_WriteReg(0x84, 0x0000); LCD_WriteReg(0x85, 0x0000); /* -------------- Panel Control ------------------- */ LCD_WriteReg(0x90, 0x0010); LCD_WriteReg(0x92, 0x0600); LCD_WriteReg(0x07, 0x0133); /* 262K color and display ON */ }