RM69032在MTK6739平台调试案例屏的型号为H163QLN01.1 1，先简单介绍屏的接口定义，此屏接口定义有E

屏的型号为H163QLN01.1

1，先简单介绍屏的接口定义，此屏接口定义有ELVDD&ELVSS，可以看出不带升压IC，ELVDD跟ELVSS分别是正负电压，type value分别为+4.63，-3.45这个需要主板提供给屏，工作原理是当主板下完初始化后，下了亮度指令后(大多数IC是51h，此处是CFh的P1)，第10脚SWIRE会输出高电平给到升压IC(TPS65631)的使能脚(CTRL)，方可实现升压。

VDD是Analog Power supply type value=3.0V

IOVDD是Digital Power supply type value=1.8V

TE是同步信号，mipi cmd mode才到，video mode用不上，至于为什么，了解一下驱动IC的GRAM

MTP是烧OTP用的，方案公司用不上\

其它就是mipi差分信号不作介绍，总体来讲接口定义比较简单

****现在讲一个真实的案例，平台是MTK6739，遇到两个问题

问题1：睡眠唤醒后，画面有一半是雪花点，初步怀疑是读了窗口地址，拿逻辑分析仪抓主板唤醒的代码。

图3 画面异常现象

图4 开机代码

图5 睡眠唤醒代码

从逻辑分析仪抓到的数据可以得知，有写2A,2B，虽然屏的分辨率是320*320，但写0X13F未必会正常，因为驱动IC的默认设置可能不是0x13F，何况规格书中没有写这两个寄存器，最好不要乱写，没必要给自己挖坑，屏蔽2A,2B指令后，屏显示正常。

OK视频

问题2：

进入睡眠后VDD与IOVCC不断电，ELVDD与ELVSS只能通过SWIRE控制开断，下睡眠指令后ELVDD与ELVSS关闭，但唤醒时会遇到闪一条白线，而且是概率性的出现，睡眠时间越长越容易出现，有点类似于TFT中的背光开早了一样，我用测试架模拟可以实现唤醒不闪，具体方法如下：

以下是测试架的代码，转接IC是SSD2828，送视频数据后再打开亮度与显示寄存器，有疑问可以联系我

TG_OpenVideo();

MIPI_SetMode(VD);//进入mipi HS MODE

//高速下指令

MIPI_GenericLongWrite(6);

MIPI_WriteData(0xF0);

MIPI_WriteData(0x55);

MIPI_WriteData(0xAA);

MIPI_WriteData(0x52);

MIPI_WriteData(0x08);

MIPI_WriteData(0x01);//page1

MIPI_GenericLongWrite(8);

MIPI_WriteData(0xCF);//p1写0xCF 打开亮度

MIPI_WriteData(0xFf);

MIPI_WriteData(0xD4);

MIPI_WriteData(0x95);

MIPI_WriteData(0xE8);

MIPI_WriteData(0x4F);

MIPI_WriteData(0x00);

MIPI_WriteData(0x04);

MIPI_GenericLongWrite(6);

MIPI_WriteData(0xF0);

MIPI_WriteData(0x55);

MIPI_WriteData(0xAA);

MIPI_WriteData(0x52);

MIPI_WriteData(0x08);

MIPI_WriteData(0x00);//page0

MIPI_DcsShortWrite(1);

MIPI_WriteData(0x29); // Display on

Delayms(20);

**
**\

以下是MTK39平台的代码节选

static struct LCM_setting_table lcm_initialization_setting[] =

{

{0xF0,5,{0x55,0xAA,0x52,0x08,0x00}},

{0xBD,5,{0x03,0x20,0x14,0x4B,0x00}},

{0xBE,5,{0x03,0x20,0x14,0x4B,0x01}},

{0xBF,5,{0x03,0x20,0x14,0x4B,0x00}},

{0xBB,3,{0x07,0x07,0x07}},

{0xC7,1,{0x40}},

{0xF0,5,{0x55,0xAA,0x52,0x08,0x02}},

{0xEB,1,{0x02}},

{0xFE,2,{0x08,0x50}},

{0xC3,3,{0xF2,0x95,0x04}},

{0xE9,3,{0x00,0x36,0x38}},

{0xCA,1,{0x04}},

{0xF0,5,{0x55,0xAA,0x52,0x08,0x01}},

{0xB0,3,{0x03,0x03,0x03}},

{0xB1,3,{0x05,0x05,0x05}},

{0xB2,3,{0x01,0x01,0x01}},

{0xB4,3,{0x07,0x07,0x07}},

{0xB5,3,{0x03,0x03,0x03}},

{0xB6,3,{0x55,0x55,0x55}},

{0xB7,3,{0x36,0x36,0x36}},

{0xB8,3,{0x23,0x23,0x23}},

{0xB9,3,{0x03,0x03,0x03}},

{0xBA,3,{0x03,0x03,0x03}},

{0xBE,3,{0x32,0x30,0x70}},

{0xCF,7,{0x00,0xD4,0x95,0xE8,0x4F,0x00,0x04}},//when boot,p1=0x00 light off，建议进入高速后再开亮度，否则会闪

{0x35,1,{0x01}},// TE ON

{0x36,1,{0x00}},

{0xC0,1,{0x20}},

{0xC2,6,{0x17,0x17,0x17,0x17,0x17,0x0B}},

{0xF0,5,{0x55,0xAA,0x52,0x08,0x02}},

{0xED,8,{{0x48,0x00,0xFF,0x13,0x08,0x30,0x0C,0x00}},

{0x11, 0, {0x00}},//Sleep out

{REGFLAG_DELAY,300,{0x00}},

{0xF0,5,{0x55,0xAA,0x52,0x08,0x02}},

{0xED,8,{0x48,0x00,0xFE,0x13,0x08,0x30,0x0C,0x00}},

{REGFLAG_DELAY, 20, {0x00}},

{0xED,8,{0x48,0x00,0xE6,0x13,0x08,0x30,0x0C,0x00}},

{REGFLAG_DELAY, 20, {0x00}},

{0xED,8,{0x48,0x00,0xE2,0x13,0x08,0x30,0x0C,0x00}},

{REGFLAG_DELAY, 20, {0x00}},

{0xED,8,{0x48,0x00,0xE0,0x13,0x08,0x30,0x0C,0x00}},

{REGFLAG_DELAY, 20, {0x00}},

{0xED,8,{0x48,0x00,0xE0,0x13,0x08,0x00,0x0C,0x00}},

{REGFLAG_DELAY, 20, {0x00}},

{0x29, 0, {0x00}},//display on

{0xF0,5,{0x55,0xAA,0x52,0x08,0x00}},

{REGFLAG_END_OF_TABLE, 99, {}}

};

static struct LCM_setting_table lcm_deep_sleep_mode_in_setting[] = {

// Display off sequence

{0x28, 0, {0x00}},

{REGFLAG_DELAY,20, {}},

{0xF0,5,{0x55,0xAA,0x52,0x08,0x00}},

{0xc8,7,{0x84,0x12,0x00,0x00,0xA0,0x00,0x0D}},

{0xF0,5,{0x55,0xAA,0x52,0x08,0x01}},

{0xc2,12,{0x1F,0x1F,0x1F,0x1F,0x1F,0x1F,0x1F,0x1F,0x1F,0x1F,0x1F,0x1F}},

{REGFLAG_DELAY,20, {}},

{0x29, 0, {0x00}},

{REGFLAG_DELAY,20, {}},

{0x28, 0, {0x00}},

{0x10, 0, {0x00}},

{REGFLAG_DELAY, 120, {}},

{REGFLAG_END_OF_TABLE,99, {}}

//power off

};

static void lcm_get_params(LCM_PARAMS *params)

{

memset(params, 0, sizeof(LCM_PARAMS));

params->type = LCM_TYPE_DSI;

params->width = FRAME_WIDTH;

params->height = FRAME_HEIGHT;

params->virtual_width = VIRTUAL_WIDTH;

params->virtual_height = VIRTUAL_HEIGHT;

// enable tearing-free

params->dbi.te_mode = LCM_DBI_TE_MODE_VSYNC_ONLY;//LCM_DBI_TE_MODE_VSYNC_ONLY;

params->dbi.te_edge_polarity = LCM_POLARITY_FALLING;

#if (LCM_DSI_CMD_MODE)

params->dsi.mode = CMD_MODE;

#else

params->dsi.mode = SYNC_PULSE_VDO_MODE;

#endif

// DSI

params->dsi.LANE_NUM = LCM_ONE_LANE;

//The following defined the fomat for data coming from LCD engine.

params->dsi.data_format.color_order = LCM_COLOR_ORDER_RGB;

params->dsi.data_format.trans_seq = LCM_DSI_TRANS_SEQ_MSB_FIRST;

params->dsi.data_format.padding = LCM_DSI_PADDING_ON_LSB;

params->dsi.data_format.format = LCM_DSI_FORMAT_RGB888;

// Video mode setting

params->dsi.packet_size=256;

params->dsi.PS=LCM_PACKED_PS_24BIT_RGB888;

params->dsi.vertical_sync_active = 2; //4;

params->dsi.vertical_backporch = 16; //12;

params->dsi.vertical_frontporch = 8; //20;

params->dsi.vertical_active_line = VIRTUAL_HEIGHT;

params->dsi.horizontal_sync_active = 4; //8;

params->dsi.horizontal_backporch = 30;

params->dsi.horizontal_frontporch = 30; //20;

params->dsi.horizontal_active_pixel = VIRTUAL_WIDTH;

params->dsi.PLL_CLOCK = 93;//fps 60，对应的Mipi速率为186Mbps