TFTLCD无法显示的问题

cllmxdsdo 提问时间：2018-12-30 20:49 /

这个问题已经困扰我好几个星期了，恳请大佬能够抽空助我一臂之力。小弟近来打算用stm32f103VET6,通过FSMC总线去驱动2.8寸TFTLCD. LCD的CS,WR,RS,RD等配置如下图所示（具体原理图请下载文件）

现在的情况是代码烧进去，LCD的背光都无法点亮，整个显示屏一片漆黑。背光的引脚LCD_BL在代码LCD_Init()里面，应该是LCD根本就没有初始化成功吧？？？还是说FSMC配置错误也会影响到LCD背光的工作？？？  以下我给出了FSMC配置的部分代码，具体代码请下载文件
      GPIO_InitTypeDef GPIO_InitStructure;
      FSMC_NORSRAMInitTypeDef  FSMC_NORSRAMInitStructure;
      FSMC_NORSRAMTimingInitTypeDef  readWriteTiming;
      FSMC_NORSRAMTimingInitTypeDef  writeTiming;

      RCC_AHBPeriphClockCmd(RCC_AHBPeriph_FSMC,ENABLE);       //使能FSMC时钟
      RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOE|RCC_APB2Periph_GPIOD ,ENABLE);//使能PORTE，PORTD

      GPIO_InitStructure.GPIO_Pin = GPIO_Pin_1;                               //PE1 推挽输出背光
      GPIO_InitStructure.GPIO_Mode = GPIO_Mode_Out_PP;                //推挽输出
      GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
      GPIO_Init(GPIOE, &GPIO_InitStructure);

      //PORTD复用推挽输出
      GPIO_InitStructure.GPIO_Pin =                   GPIO_Pin_0|GPIO_Pin_1|GPIO_Pin_4|GPIO_Pin_5|GPIO_Pin_8|GPIO_Pin_9|GPIO_Pin_10|GPIO_Pin_14|GPIO_Pin_15;
      GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_PP;                //复用推挽输出
      GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
      GPIO_Init(GPIOD, &GPIO_InitStructure);

      //PORTE复用推挽输出
      GPIO_InitStructure.GPIO_Pin = GPIO_Pin_7|GPIO_Pin_8|GPIO_Pin_9|GPIO_Pin_10|GPIO_Pin_11|GPIO_Pin_12|GPIO_Pin_13|GPIO_Pin_14|GPIO_Pin_15;
      GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_PP;                //复用推挽输出
      GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
      GPIO_Init(GPIOE, &GPIO_InitStructure);

      //PORTD12复用推挽输出 A16
      GPIO_InitStructure.GPIO_Pin = GPIO_Pin_7|GPIO_Pin_11;       //       //PORTD复用推挽输出
      GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_PP;                //复用推挽输出
      GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
      GPIO_Init(GPIOD, &GPIO_InitStructure);

      readWriteTiming.FSMC_AddressSetupTime = 0x01;       //地址建立时间（ADDSET）为2个HCLK 1/36M=27ns
      readWriteTiming.FSMC_AddressHoldTime = 0x00;       //地址保持时间（ADDHLD）模式A未用到
      readWriteTiming.FSMC_DataSetupTime = 0x0f;// 数据保存时间为16个HCLK,因为液晶驱动IC的读数据的时候，速度不能太快。
      readWriteTiming.FSMC_BusTurnAroundDuration = 0x00;
      readWriteTiming.FSMC_CLKDivision = 0x00;
      readWriteTiming.FSMC_DataLatency = 0x00;
      readWriteTiming.FSMC_AccessMode = FSMC_AccessMode_A;       //模式A

      writeTiming.FSMC_AddressSetupTime = 0x00;       //地址建立时间（ADDSET）为1个HCLK
      writeTiming.FSMC_AddressHoldTime = 0x00;       //地址保持时间（A
      writeTiming.FSMC_DataSetupTime = 0x03;                ////数据保存时间为4个HCLK
      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_NORSRAM1;//  这里我们使用NE1 。
  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_16b;//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_NORSRAM1, ENABLE);  // 使能BANK1

我把LCD_BL拿出LCD_Init（）函数去重新配置就可以点亮LCD的背光。我现在已经开始怀疑是不是硬件有问题了。。。。