stm32f407跑st7796s4.0屏请教

qiji1973

屏是st7796s驱动芯片，480*320的SPI屏，按卖家的驱动代码，刷满屏颜色正常，但是上电初始化后屏幕右侧或左侧会有一块区域花屏混合着正常程序显示的界面中，这并不是程序产生的，应该是初始化的问题，求老师们帮解，谢谢咯！（实际上只用0X3A和0XB4两条命令就可以驱动屏幕正常刷屏），驱动程序如下：（
LCD_WR_REG(0xF0);
LCD_WR_DATA(0xC3);
LCD_WR_REG(0xF0);
LCD_WR_DATA(0x96);

LCD_WR_REG(0x36);
LCD_WR_DATA(0x68);

LCD_WR_REG(0x3A);
LCD_WR_DATA(0x05);


LCD_WR_REG(0xB0);
LCD_WR_DATA(0x80);


LCD_WR_REG(0xB6);
LCD_WR_DATA(0x00);
LCD_WR_DATA(0x02);

LCD_WR_REG(0xB5);
LCD_WR_DATA(0x02);
LCD_WR_DATA(0x03);
LCD_WR_DATA(0x00);
LCD_WR_DATA(0x04);

LCD_WR_REG(0xB1);
LCD_WR_DATA(0x80);
LCD_WR_DATA(0x10);


LCD_WR_REG(0xB4);
LCD_WR_DATA(0x00);

LCD_WR_REG(0xB7);
LCD_WR_DATA(0xC6);

LCD_WR_REG(0xC5);
LCD_WR_DATA(0x24);

LCD_WR_REG(0xE4);
LCD_WR_DATA(0x31);

LCD_WR_REG(0xE8);
LCD_WR_DATA(0x40);
LCD_WR_DATA(0x8A);
LCD_WR_DATA(0x00);
LCD_WR_DATA(0x00);
LCD_WR_DATA(0x29);
LCD_WR_DATA(0x19);
LCD_WR_DATA(0xA5);
LCD_WR_DATA(0x33);


LCD_WR_REG(0xC2);

LCD_WR_REG(0xA7);

LCD_WR_REG(0xE0);
LCD_WR_DATA(0xF0);
LCD_WR_DATA(0x09);
LCD_WR_DATA(0x13);
LCD_WR_DATA(0x12);
LCD_WR_DATA(0x12);
LCD_WR_DATA(0x2B);
LCD_WR_DATA(0x3C);
LCD_WR_DATA(0x44);
LCD_WR_DATA(0x4B);
LCD_WR_DATA(0x1B);
LCD_WR_DATA(0x18);
LCD_WR_DATA(0x17);
LCD_WR_DATA(0x1D);
LCD_WR_DATA(0x21);

LCD_WR_REG(0XE1);
LCD_WR_DATA(0xF0);
LCD_WR_DATA(0x09);
LCD_WR_DATA(0x13);
LCD_WR_DATA(0x0C);
LCD_WR_DATA(0x0D);
LCD_WR_DATA(0x27);
LCD_WR_DATA(0x3B);
LCD_WR_DATA(0x44);
LCD_WR_DATA(0x4D);
LCD_WR_DATA(0x0B);
LCD_WR_DATA(0x17);
LCD_WR_DATA(0x17);
LCD_WR_DATA(0x1D);
LCD_WR_DATA(0x21);

LCD_WR_REG(0X36);
LCD_WR_DATA(0xEC);


LCD_WR_REG(0xF0);
LCD_WR_DATA(0xC3);
LCD_WR_REG(0xF0);
LCD_WR_DATA(0x69);

LCD_WR_REG(0X13);

LCD_WR_REG(0X11);


LCD_WR_REG(0X29);

正点原子

图片呢》？

qiji1973

正点原子 发表于 2020-6-11 01:37
图片呢》？

我的级别好像还不能上传图片    感觉就是屏幕的三分之一是雪花点的那样！

qiji1973

我似乎目前的级别不能够发送图片，另外，最头疼的是程序在运行中，会出现白屏，发现源代码中显示动态图形程序使用了DMA的方式，源程序是9341驱动的屏幕，这个在驱动7796屏是否会有冲突呢？
void LcdSpiDmaSend( void ){
  
  SPI_Cmd(SPIx, DISABLE);
  SPI_I2S_DeInit(SPIx);
  SPI_InitTypeDef  SPI_InitStructure;
  SPI_InitStructure.SPI_Direction = SPI_Direction_2Lines_FullDuplex;
  SPI_InitStructure.SPI_DataSize = SPI_DataSize_8b;
  SPI_InitStructure.SPI_CPOL = SPI_CPOL_Low;
  SPI_InitStructure.SPI_CPHA = SPI_CPHA_1Edge;
  SPI_InitStructure.SPI_NSS = SPI_NSS_Soft;
  SPI_InitStructure.SPI_BaudRatePrescaler = SPI_BaudRatePrescaler_2;
  SPI_InitStructure.SPI_FirstBit = SPI_FirstBit_MSB;
  SPI_InitStructure.SPI_CRCPolynomial = 7;
  SPI_InitStructure.SPI_Mode = SPI_Mode_Master;
  SPI_Init(SPIx, &SPI_InitStructure);
  SPI_Cmd(SPIx, ENABLE);
  
  
  
  DMA_InitTypeDef DMA_InitStructure;
  RCC_AHB1PeriphClockCmd(SPIx_DMA_CLK, ENABLE);
  
/* unsigned short hg[2];
  hg[0] = 0x0103;
  hg[1] = 0x0F70;*/
  
  /* Deinitialize DMA Streams */
  DMA_DeInit(SPIx_TX_DMA_STREAM);
  
  /* Configure DMA Initialization Structure */
  DMA_InitStructure.DMA_BufferSize = 30720;//15360;//30720 ;
  DMA_InitStructure.DMA_FIFOMode = DMA_FIFOMode_Disable ;
  DMA_InitStructure.DMA_FIFOThreshold = DMA_FIFOThreshold_1QuarterFull ;
  DMA_InitStructure.DMA_MemoryBurst = DMA_MemoryBurst_Single ;
  
  DMA_InitStructure.DMA_MemoryDataSize = DMA_MemoryDataSize_Byte;
  //DMA_InitStructure.DMA_MemoryDataSize = DMA_MemoryDataSize_HalfWord;
  
  DMA_InitStructure.DMA_MemoryInc = DMA_MemoryInc_Enable;
  DMA_InitStructure.DMA_Mode = DMA_Mode_Normal;
  DMA_InitStructure.DMA_PeripheralBaseAddr =(uint32_t) (&(SPI1->DR)) ;
  DMA_InitStructure.DMA_PeripheralBurst = DMA_PeripheralBurst_Single;
  
  DMA_InitStructure.DMA_PeripheralDataSize = DMA_PeripheralDataSize_Byte;
  //DMA_InitStructure.DMA_PeripheralDataSize = DMA_MemoryDataSize_HalfWord;
  
  DMA_InitStructure.DMA_PeripheralInc = DMA_PeripheralInc_Disable;
  DMA_InitStructure.DMA_Priority = DMA_Priority_High;

  /* Configure TX DMA */
  DMA_InitStructure.DMA_Channel = SPIx_TX_DMA_CHANNEL ;
  DMA_InitStructure.DMA_DIR = DMA_DIR_MemoryToPeripheral ;
  DMA_InitStructure.DMA_Memory0BaseAddr =(uint32_t)&Buf_float_tmp2[0] ;
  DMA_Init(SPIx_TX_DMA_STREAM, &DMA_InitStructure);

  /* Enable DMA SPI TX Stream */
  DMA_Cmd(SPIx_TX_DMA_STREAM,ENABLE);
  /* Enable SPI DMA TX Requsts */
  SPI_I2S_DMACmd(SPI1, SPI_I2S_DMAReq_Tx, ENABLE);
  

  
    /* Waiting the end of Data transfer */
  while (DMA_GetFlagStatus(SPIx_TX_DMA_STREAM,SPIx_TX_DMA_FLAG_TCIF)==RESET);
  
  /* Clear DMA Transfer Complete Flags */
  DMA_ClearFlag(SPIx_TX_DMA_STREAM,SPIx_TX_DMA_FLAG_TCIF);
  
  /* Disable DMA SPI TX Stream */
  DMA_Cmd(SPIx_TX_DMA_STREAM,DISABLE);
  
  /* Disable SPI DMA TX Requsts */
  SPI_I2S_DMACmd(SPI1, SPI_I2S_DMAReq_Tx, DISABLE);

  
  
    SPI_Cmd(SPIx, DISABLE);
  SPI_I2S_DeInit(SPIx);

  SPI_InitStructure.SPI_Direction = SPI_Direction_2Lines_FullDuplex;
  SPI_InitStructure.SPI_DataSize = SPI_DataSize_8b;
  SPI_InitStructure.SPI_CPOL = SPI_CPOL_Low;
  SPI_InitStructure.SPI_CPHA = SPI_CPHA_1Edge;
  SPI_InitStructure.SPI_NSS = SPI_NSS_Soft;
  SPI_InitStructure.SPI_BaudRatePrescaler = SPI_BaudRatePrescaler_2;
  SPI_InitStructure.SPI_FirstBit = SPI_FirstBit_MSB;
  SPI_InitStructure.SPI_CRCPolynomial = 7;
  SPI_InitStructure.SPI_Mode = SPI_Mode_Master;
  SPI_Init(SPIx, &SPI_InitStructure);
  SPI_Cmd(SPIx, ENABLE);
}

void DMA2_Stream3_IRQHandler( void ){

  if (DMA_GetFlagStatus(DMA2_Stream3, DMA_FLAG_TCIF3) == SET)
  {


  }


}

正点原子

帮顶

13402957450

楼主你有没有这个屏显示曲线的函数

hbyue

楼主，你使用的是TFT真彩屏吗？