手上有块TFT,ILI9486 8位的，能正常显示，但无法读出ID和颜色值，请大家帮忙看看程序哪有问题？

rgzdb

手上有块TFT,ILI9486  8位的，能正常显示，但无法读出ID和颜色值，怀疑LCD_RD_DATA和LCD_ReadPoint函数有问题，请大家帮忙看看程序哪有问题？

[mw_shl_code=c,true]#define Bank1_LCD_D ((uint32_t)0x6C000040) //disp Data ADDR #define Bank1_LCD_C ((uint32_t)0x6C000000) //disp Reg ADDR //写寄存器函数 //regval:寄存器值 void LCD_WR_REG(uint8_t index) { *(__IO uint8_t *) (Bank1_LCD_C)= index; } //写LCD数据 //data:要写入的值 void LCD_WR_DATA(uint8_t val) { *(__IO uint8_t *) (Bank1_LCD_D)= val; } //读LCD数据 //返回值:读到的值 uint16_t LCD_RD_DATA(void) { uint16_t a; uint16_t low = 0; uint16_t high = 0; LCD_WR_REG(0x2e); a=*(__IO uint8_t *) (Bank1_LCD_D); a=*(__IO uint8_t *) (Bank1_LCD_D); high=*(__IO uint8_t *) (Bank1_LCD_D); low=*(__IO uint8_t *) (Bank1_LCD_D); a= (high<<8)|(low&0xFF); return a; } //写寄存器 //LCD_Reg:寄存器地址 //LCD_RegValue:要写入的数据 //void LCD_WriteReg(uint8_t index, vu16 LCD_RegValue) //{ ////// LCD->LCD_REG = LCD_Reg>>8; //写入要写的寄存器序号 //// LCD->LCD_REG = LCD_Reg; //// LCD->LCD_RAM = LCD_RegValue>>8;//写入数据 //// LCD->LCD_RAM = LCD_RegValue; //} //读寄存器 //LCD_Reg:寄存器地址 //返回值:读到的数据 u16 LCD_ReadReg(vu16 LCD_Reg) { vu16 info; LCD_WR_REG(LCD_Reg); //写入要读的寄存器序号 delay_us(5); info=LCD_RD_DATA(); info<<=8; info|=LCD_RD_DATA(); return info; //返回读到的值 } //开始写GRAM void LCD_WriteRAM_Prepare(void) { *(__IO uint8_t *) (Bank1_LCD_C)=0x2C; } //LCD写GRAM //RGB_Code:颜色值 void LCD_WriteRAM(u16 RGB_Code) { *(__IO uint8_t *) (Bank1_LCD_D) = RGB_Code>>8;//写十六位GRAM *(__IO uint8_t *) (Bank1_LCD_D) = RGB_Code&0xFF; } //当mdk -O1时间优化时需要设置 //延时i void opt_delay(u8 i) { while(i--); } //读取个某点的颜色值 //x,y:坐标 //返回值:此点的颜色 u16 LCD_ReadPoint(u16 x,u16 y) { vu16 r=0,g=0,b=0; if(x>=272||y>=480)return 0; //超过了范围,直接返回 LCD_SetCursor(x,y); LCD_WR_REG(0X2E);//9486 发送读GRAM指令 LCD_RD_DATA(); //dummy Read opt_delay(2); return (LCD_RD_DATA()); //实际坐标颜色，要分2次读出 } //LCD开启显示 void LCD_DisplayOn(void) { LCD_WR_REG(0X29); //开启显示 } //LCD关闭显示 void LCD_DisplayOff(void) { LCD_WR_REG(0X28); //关闭显示 } //设置光标位置 //Xpos:横坐标 //Ypos:纵坐标 void LCD_SetCursor(u16 Xpos, u16 Ypos) { LCD_WR_REG(0x2A); LCD_WR_DATA((Xpos+24)>>8); LCD_WR_DATA(0xFF&(Xpos+24)); // LCD_WR_DATA((272-1)>>8); // LCD_WR_DATA((272-1)); LCD_WR_REG(0x2B); LCD_WR_DATA(Ypos>>8); LCD_WR_DATA(0x00FF&Ypos); // LCD_WR_DATA((480-1)>>8); // LCD_WR_DATA((480-1)); } //画点 //x,y:坐标 //POINT_COLOR:此点的颜色 void LCD_DrawPoint(u16 x,u16 y) { LCD_SetCursor(x,y); //设置光标位置 LCD_WriteRAM_Prepare(); //开始写入GRAM LCD_WriteRAM(POINT_COLOR); } //设置窗口,并自动设置画点坐标到窗口左上角(sx,sy). //sx,sy:窗口起始坐标(左上角) //width,height:窗口宽度和高度,必须大于0!! //窗体大小:width*height. //68042,横屏时不支持窗口设置!! void LCD_Set_Window(u16 sx,u16 sy,u16 width,u16 height) { width=sx+width-1; height=sy+height-1; LCD_WR_REG(0x2A); LCD_WR_DATA(sx>>8); LCD_WR_DATA(sx&0XFF); LCD_WR_DATA(width>>8); LCD_WR_DATA(width&0XFF); LCD_WR_REG(0x2B); LCD_WR_DATA(sy>>8); LCD_WR_DATA(sy&0XFF); LCD_WR_DATA(height>>8); LCD_WR_DATA(height&0XFF); } //初始化lcd //该初始化函数可以初始化各种ILI93XX液晶,但是其他函数是基于ILI9320的!!! //在其他型号的驱动芯片上没有测试! void LCD_Init(void) { vu32 i=0; GPIO_InitTypeDef GPIO_InitStructure; FSMC_NORSRAMInitTypeDef FSMC_NORSRAMInitStructure; FSMC_NORSRAMTimingInitTypeDef readWriteTiming; FSMC_NORSRAMTimingInitTypeDef writeTiming; RCC_AHB1PeriphClockCmd(RCC_AHB1Periph_GPIOB|RCC_AHB1Periph_GPIOC|RCC_AHB1Periph_GPIOD|RCC_AHB1Periph_GPIOE|RCC_AHB1Periph_GPIOF|RCC_AHB1Periph_GPIOG, ENABLE);//使能PD,PE,PF,PG时钟 RCC_AHB3PeriphClockCmd(RCC_AHB3Periph_FSMC,ENABLE);//使能FSMC时钟 GPIO_InitStructure.GPIO_Pin = GPIO_Pin_6;//PC6 推挽输出,控制背光 GPIO_InitStructure.GPIO_Mode = GPIO_Mode_OUT;//普通输出模式 GPIO_InitStructure.GPIO_OType = GPIO_OType_PP;//推挽输出 GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;//100MHz GPIO_InitStructure.GPIO_PuPd = GPIO_PuPd_UP;//上拉 GPIO_Init(GPIOC, &GPIO_InitStructure);//初始化 //PC6 推挽输出,控制背光 GPIO_ResetBits(GPIOC,GPIO_Pin_6); //关闭背光 GPIO_InitStructure.GPIO_Pin= GPIO_Pin_11;//PB11 推挽输出,控制LCD复位 GPIO_Init(GPIOB,&GPIO_InitStructure);//初始化 //PB11 推挽输出,控制LCD复位 GPIO_InitStructure.GPIO_Pin = (3<<0)|(3<<4)|(7<<8)|(3<<14);//PD0,1,4,5,8,9,10,14,15 AF OUT GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF;//复用输出 GPIO_InitStructure.GPIO_OType = GPIO_OType_PP;//推挽输出 GPIO_InitStructure.GPIO_Speed = GPIO_Speed_100MHz;//100MHz GPIO_InitStructure.GPIO_PuPd = GPIO_PuPd_UP;//上拉 GPIO_Init(GPIOD, &GPIO_InitStructure);//初始化 GPIO_InitStructure.GPIO_Pin = (0X1FF<<7);//PE7~15,AF OUT GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF;//复用输出 GPIO_InitStructure.GPIO_OType = GPIO_OType_PP;//推挽输出 GPIO_InitStructure.GPIO_Speed = GPIO_Speed_100MHz;//100MHz GPIO_InitStructure.GPIO_PuPd = GPIO_PuPd_UP;//上拉 GPIO_Init(GPIOE, &GPIO_InitStructure);//初始化 GPIO_InitStructure.GPIO_Pin = GPIO_Pin_12;//PF12,FSMC_A6 GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF;//复用输出 GPIO_InitStructure.GPIO_OType = GPIO_OType_PP;//推挽输出 GPIO_InitStructure.GPIO_Speed = GPIO_Speed_100MHz;//100MHz GPIO_InitStructure.GPIO_PuPd = GPIO_PuPd_UP;//上拉 GPIO_Init(GPIOF, &GPIO_InitStructure);//初始化 GPIO_InitStructure.GPIO_Pin = GPIO_Pin_12;//PG12,LCD_CS GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF;//复用输出 GPIO_InitStructure.GPIO_OType = GPIO_OType_PP;//推挽输出 GPIO_InitStructure.GPIO_Speed = GPIO_Speed_100MHz;//100MHz GPIO_InitStructure.GPIO_PuPd = GPIO_PuPd_UP;//上拉 GPIO_Init(GPIOG, &GPIO_InitStructure);//初始化 GPIO_PinAFConfig(GPIOD,GPIO_PinSource0,GPIO_AF_FSMC);//PD0,AF12 GPIO_PinAFConfig(GPIOD,GPIO_PinSource1,GPIO_AF_FSMC);//PD1,AF12 GPIO_PinAFConfig(GPIOD,GPIO_PinSource4,GPIO_AF_FSMC); GPIO_PinAFConfig(GPIOD,GPIO_PinSource5,GPIO_AF_FSMC); GPIO_PinAFConfig(GPIOD,GPIO_PinSource8,GPIO_AF_FSMC); GPIO_PinAFConfig(GPIOD,GPIO_PinSource9,GPIO_AF_FSMC); GPIO_PinAFConfig(GPIOD,GPIO_PinSource10,GPIO_AF_FSMC); GPIO_PinAFConfig(GPIOD,GPIO_PinSource14,GPIO_AF_FSMC); GPIO_PinAFConfig(GPIOD,GPIO_PinSource15,GPIO_AF_FSMC);//PD15,AF12 GPIO_PinAFConfig(GPIOE,GPIO_PinSource7,GPIO_AF_FSMC);//PE7,AF12 GPIO_PinAFConfig(GPIOE,GPIO_PinSource8,GPIO_AF_FSMC); GPIO_PinAFConfig(GPIOE,GPIO_PinSource9,GPIO_AF_FSMC); GPIO_PinAFConfig(GPIOE,GPIO_PinSource10,GPIO_AF_FSMC); GPIO_PinAFConfig(GPIOE,GPIO_PinSource11,GPIO_AF_FSMC); GPIO_PinAFConfig(GPIOE,GPIO_PinSource12,GPIO_AF_FSMC); GPIO_PinAFConfig(GPIOE,GPIO_PinSource13,GPIO_AF_FSMC); GPIO_PinAFConfig(GPIOE,GPIO_PinSource14,GPIO_AF_FSMC); GPIO_PinAFConfig(GPIOE,GPIO_PinSource15,GPIO_AF_FSMC);//PE15,AF12 GPIO_PinAFConfig(GPIOF,GPIO_PinSource12,GPIO_AF_FSMC);//PF12,AF12 GPIO_PinAFConfig(GPIOG,GPIO_PinSource12,GPIO_AF_FSMC); readWriteTiming.FSMC_AddressSetupTime = 0XF; //地址建立时间（ADDSET）为16个HCLK 1/168M=6ns*16=96ns readWriteTiming.FSMC_AddressHoldTime = 0x00; //地址保持时间（ADDHLD）模式A未用到 readWriteTiming.FSMC_DataSetupTime = 60; //数据保存时间为60个HCLK =6*60=360ns readWriteTiming.FSMC_BusTurnAroundDuration = 0x00; readWriteTiming.FSMC_CLKDivision = 0x00; readWriteTiming.FSMC_DataLatency = 0x00; readWriteTiming.FSMC_AccessMode = FSMC_AccessMode_A; //模式A writeTiming.FSMC_AddressSetupTime =9; //地址建立时间（ADDSET）为9个HCLK =54ns writeTiming.FSMC_AddressHoldTime = 0x00; //地址保持时间（A writeTiming.FSMC_DataSetupTime = 8; //数据保存时间为6ns*9个HCLK=54ns writeTiming.FSMC_BusTurnAroundDuration = 0x00; writeTiming.FSMC_CLKDivision = 0x00; writeTiming.FSMC_DataLatency = 0x00; writeTiming.FSMC_AccessMode = FSMC_AccessMode_A; //模式A FSMC_NORSRAMInitStructure.FSMC_Bank = FSMC_Bank1_NORSRAM4;// 这里我们使用NE4 ，也就对应BTCR[6],[7]。 FSMC_NORSRAMInitStructure.FSMC_DataAddressMux = FSMC_DataAddressMux_Disable; // 不复用数据地址 FSMC_NORSRAMInitStructure.FSMC_MemoryType =FSMC_MemoryType_SRAM;// FSMC_MemoryType_SRAM; //SRAM FSMC_NORSRAMInitStructure.FSMC_MemoryDataWidth = FSMC_MemoryDataWidth_8b;//存储器数据宽度为16bit FSMC_NORSRAMInitStructure.FSMC_BurstAccessMode =FSMC_BurstAccessMode_Disable;// FSMC_BurstAccessMode_Disable; FSMC_NORSRAMInitStructure.FSMC_WaitSignalPolarity = FSMC_WaitSignalPolarity_Low; FSMC_NORSRAMInitStructure.FSMC_AsynchronousWait=FSMC_AsynchronousWait_Disable; FSMC_NORSRAMInitStructure.FSMC_WrapMode = FSMC_WrapMode_Disable; FSMC_NORSRAMInitStructure.FSMC_WaitSignalActive = FSMC_WaitSignalActive_BeforeWaitState; FSMC_NORSRAMInitStructure.FSMC_WriteOperation = FSMC_WriteOperation_Enable; // 存储器写使能 FSMC_NORSRAMInitStructure.FSMC_WaitSignal = FSMC_WaitSignal_Disable; FSMC_NORSRAMInitStructure.FSMC_ExtendedMode = FSMC_ExtendedMode_Enable; // 读写使用不同的时序 FSMC_NORSRAMInitStructure.FSMC_WriteBurst = FSMC_WriteBurst_Disable; FSMC_NORSRAMInitStructure.FSMC_ReadWriteTimingStruct = &readWriteTiming; //读写时序 FSMC_NORSRAMInitStructure.FSMC_WriteTimingStruct = &writeTiming; //写时序 FSMC_NORSRAMInit(&FSMC_NORSRAMInitStructure); //初始化FSMC配置 FSMC_NORSRAMCmd(FSMC_Bank1_NORSRAM4, ENABLE); // 使能BANK1 /*===========LCD 复位=======================*/ GPIO_ResetBits(GPIOB, GPIO_Pin_11); delay_ms(150); // delay 50 ms GPIO_SetBits(GPIOB, GPIO_Pin_11 ); delay_ms(150); // delay 50 ms ; //尝试9486 ID的读取 LCD_WR_REG(0XD3); lcdid=LCD_RD_DATA(); //dummy read lcdid=LCD_RD_DATA(); //读到0X00 lcdid=LCD_RD_DATA(); //读取94 lcdid<<=8; lcdid|=LCD_RD_DATA(); //读取86 printf(" LCD ID:%x\r\n",lcdid); //打印LCD ID // if(lcddev.id==0X9486) //9486初始化 if(1) //9486初始化 { LCD_WR_REG(0x11); delay_ms(120); LCD_WR_REG(0x13); delay_ms(120); LCD_WR_REG(0xD0);//电源设置，有3个参数，P115，色彩过白就调节这个3个参数 LCD_WR_DATA(0x07);//P115 LCD_WR_DATA(0x45);//P115 LCD_WR_DATA(0x18);//P115-116 LCD_WR_REG( 0xD1); LCD_WR_DATA( 0x03); LCD_WR_DATA( 0x10);//VCM LCD_WR_DATA( 0x05);//VDV // LCD_WR_REG(0x00D1);//VCOM Control，有3个参数，P117 // LCD_WR_INITDATA(0x0000);//P118 // LCD_WR_INITDATA(0x0001);//P117 // LCD_WR_INITDATA(0x001F);//P117-118 LCD_WR_REG(0xD2);//Power Setting for Normal Mode，有2个参数，P119 LCD_WR_DATA(0x01);//P118 LCD_WR_DATA(0x11);//P119 LCD_WR_REG(0xC0);//Panel Driving Setting，有6个参数，P102，主要设置行扫描 LCD_WR_DATA(0x00);//P102-103 GS=0 LCD_WR_DATA(0x3B);//P103，(0x3B + 1) * 8 = 480行 LCD_WR_DATA(0x00);//P103 LCD_WR_DATA(0x00);//P103 LCD_WR_DATA(0x11);//P103-104 // LCD_WR_INITDATA(0x0000);//P103-104 LCD_WR_REG(0xC1);//Didsplay Timing Setting for Normal Mode，有3个参数，P106 LCD_WR_DATA(0x10);//P106 LCD_WR_DATA(0x0B);//P106 LCD_WR_DATA(0x88);//P107 LCD_WR_REG(0xC5);//Frame Rate and Inversion control，有1个参数，P112 LCD_WR_DATA(0x00);//P112 LCD_WR_REG(0xC8);//Gamma Setting，有12个参数，P114 LCD_WR_DATA(0x00);//P114 LCD_WR_DATA(0x14);//P114 LCD_WR_DATA(0x33);//P114 LCD_WR_DATA(0x10);//P114 LCD_WR_DATA(0x00);//P114 LCD_WR_DATA(0x16);//P114 LCD_WR_DATA(0x44);//P114 LCD_WR_DATA(0x36);//P114 LCD_WR_DATA(0x77);//P114 LCD_WR_DATA(0x00);//P114 LCD_WR_DATA(0x0F);//P114 LCD_WR_DATA(0x00);//P114 LCD_WR_REG(0x30); // LCD_WR_DATA(0x00); // LCD_WR_DATA(0x18); // LCD_WR_DATA(0x01); // LCD_WR_DATA(0x10); // LCD_WR_REG(0x3A);//Set Pixel Format，有1个参数，P86 LCD_WR_DATA(0x55);//0x0055为65K色，0x0066为26万色，P86 LCD_WR_REG(0x36); //Set_address_mode LCD_WR_DATA(0x00); //竖屏，从左下角开始，从左到右，从下到上 LCD_WR_REG(0x2A); LCD_WR_DATA(0x00); LCD_WR_DATA(0x00); LCD_WR_DATA(0x01); LCD_WR_DATA(0x27); LCD_WR_REG(0x2B); LCD_WR_DATA(0x00); LCD_WR_DATA(0x00); LCD_WR_DATA(0x01); LCD_WR_DATA(0xDF); delay_ms(120); LCD_WR_REG(0x29); } LCD_LED=1; //点亮背光 LCD_Clear(RED); } //清屏函数 //color:要清屏的填充色 void LCD_Clear(u16 color) { u32 index=0; u32 totalpoint=272; uint8_t color1; uint8_t color2; color1=color>>8; color2=color&0xff; totalpoint*=480; //得到总点数 LCD_SetCursor(0x00,0x0000); //设置光标位置 LCD_WriteRAM_Prepare(); //开始写入GRAM for(index=0;index<totalpoint;index++) { // LCD_WriteRAM(color); LCD_WR_DATA(color1); LCD_WR_DATA(color2); } } [/mw_shl_code]

八度空间

F4用FSMC操作8位数据总线的屏幕我也没读取到ID，后来直接用IO模拟来操作，这样就对了，不过还要注意时序，在写入数据函数中，写入低8位数据的时候要加多一个延时WR控制线那里

rgzdb

主要想移植emwin,不能正确读颜色值会出问题，用IO模拟能正确读取ID和颜色值吗？IO模拟D0-D7管脚分散，赋值处理比较麻烦，有什么好方法吗？

creating

回复【3楼】rgzdb:
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你好，我也在用这种屏，我用的是8位8080总线接口，用模拟IO口读写数据，我现在遇到的问题和你遇到的是一样的，只能显示，但是不能从液晶屏中准确读出颜色值，不知道你解决了没有，如果解决了麻烦指点我一下，我邮箱945879112@qq.com

rgzdb

还不行，用FSMC 8位和16位能正确写，但读不行。

Mrzeng

是不是复位没有复位好，必须先复位在去读ID。