F103的SPI2与ILI9341显示屏控制器通信

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wfy680 发布时间：2018-6-10 15:26

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本帖最后由 wfy680 于 2018-6-10 15:30 编辑

原本将SPI2对应的IO脚设置成GPIO，模拟SPI与ILI9341通信，一切正常。现在将这个口设置成SPI，通信不显示，请高手指教。代码如下：
#define SPI_MASTER_NSS          GPIO_Pin_12
#define SPI_MASTER_SCK          GPIO_Pin_13
#define SPI_MASTER_MI          GPIO_Pin_14
#define SPI_MASTER_MO          GPIO_Pin_15

void OLED_Init(void)
{
  GPIO_InitTypeDef  GPIO_InitStructure;
  RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOA , ENABLE);
  GPIO_InitStructure.GPIO_Pin = GPIO_Pin_8|GPIO_Pin_9|GPIO_Pin_10 ;    //D/C BLK RST
  GPIO_InitStructure.GPIO_Mode = GPIO_Mode_Out_PP; //推挽输出
  GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz; //速度50MHz
  GPIO_Init(GPIOA, &GPIO_InitStructure);
  GPIO_SetBits(GPIOA , GPIO_Pin_9);    // 背光，高电平亮
  OLED_RST_Clr(); // 复位
  Delay_ms(2);
  OLED_RST_Set();
  Delay_ms(5);

  SPI2_UserInit();

//************* Start Initial Sequence **********//
  LCD_WR_REG(0xCF);
  LCD_WR_DATA8(0x00);
  LCD_WR_DATA8(0xD9);
  LCD_WR_DATA8(0X30);

  LCD_WR_REG(0xED);
  LCD_WR_DATA8(0x64);
  LCD_WR_DATA8(0x03);
  LCD_WR_DATA8(0X12);
  LCD_WR_DATA8(0X81);

  LCD_WR_REG(0xE8);
  LCD_WR_DATA8(0x85);
  LCD_WR_DATA8(0x10);
  LCD_WR_DATA8(0x78);

  LCD_WR_REG(0xCB);
  LCD_WR_DATA8(0x39);
  LCD_WR_DATA8(0x2C);
  LCD_WR_DATA8(0x00);
  LCD_WR_DATA8(0x34);
  LCD_WR_DATA8(0x02);

  LCD_WR_REG(0xF7);
  LCD_WR_DATA8(0x20);

  LCD_WR_REG(0xEA);
  LCD_WR_DATA8(0x00);
  LCD_WR_DATA8(0x00);

  LCD_WR_REG(0xC0); //Power control
  LCD_WR_DATA8(0x21); //VRH[5:0]

  LCD_WR_REG(0xC1); //Power control
  LCD_WR_DATA8(0x12); //SAP[2:0];BT[3:0]

  LCD_WR_REG(0xC5); //VCM control
  LCD_WR_DATA8(0x32);
  LCD_WR_DATA8(0x3C);

  LCD_WR_REG(0xC7); //VCM control2
  LCD_WR_DATA8(0XC1);

  LCD_WR_REG(0x36); // Memory Access Control
  LCD_WR_DATA8(0x08);  // BGR顺序

  LCD_WR_REG(0x3A);    // 16位像素
  LCD_WR_DATA8(0x55);

  LCD_WR_REG(0xB1); //帧速率控制
  LCD_WR_DATA8(0x00);
  LCD_WR_DATA8(0x18);

  LCD_WR_REG(0xB6); // Display Function Control
  LCD_WR_DATA8(0x0A);
  LCD_WR_DATA8(0xA2);

  LCD_WR_REG(0xF2); // 3Gamma Function Disable
  LCD_WR_DATA8(0x00);

  LCD_WR_REG(0x26); //Gamma curve selected
  LCD_WR_DATA8(0x01);

  LCD_WR_REG(0xE0); //Set Gamma
  LCD_WR_DATA8(0x0F);
  LCD_WR_DATA8(0x20);
  LCD_WR_DATA8(0x1E);
  LCD_WR_DATA8(0x09);
  LCD_WR_DATA8(0x12);
  LCD_WR_DATA8(0x0B);
  LCD_WR_DATA8(0x50);
  LCD_WR_DATA8(0XBA);
  LCD_WR_DATA8(0x44);
  LCD_WR_DATA8(0x09);
  LCD_WR_DATA8(0x14);
  LCD_WR_DATA8(0x05);
  LCD_WR_DATA8(0x23);
  LCD_WR_DATA8(0x21);
  LCD_WR_DATA8(0x00);

  LCD_WR_REG(0XE1); //Set Gamma
  LCD_WR_DATA8(0x00);
  LCD_WR_DATA8(0x19);
  LCD_WR_DATA8(0x19);
  LCD_WR_DATA8(0x00);
  LCD_WR_DATA8(0x12);
  LCD_WR_DATA8(0x07);
  LCD_WR_DATA8(0x2D);
  LCD_WR_DATA8(0x28);
  LCD_WR_DATA8(0x3F);
  LCD_WR_DATA8(0x02);
  LCD_WR_DATA8(0x0A);
  LCD_WR_DATA8(0x08);
  LCD_WR_DATA8(0x25);
  LCD_WR_DATA8(0x2D);
  LCD_WR_DATA8(0x0F);

  LCD_WR_REG(0x11); //Exit Sleep
  Delay_ms(120);
  LCD_WR_REG(0x29); //Display on

  LCD_DrawPoint(100,100,RED);  // ****设置一个红点验证，不成功！！

}

void LCD_DrawPoint(u16 x,u16 y,u16 Color)
{
Address_set(x,y,x,y);//设置光标位置
LCD_WR_DATA(Color);
}

void LCD_WR_DATA8(char da) // 写 8 bit 数据
{
  OLED_DC_Set();
  SPI2_Send(da);
}

void LCD_WR_REG(char da)  // 写 8 bit 指令
{
  OLED_DC_Clr();
  SPI2_Send(da);
}

void LCD_WR_DATA(int da)
{
  OLED_DC_Set();
  SPI2_Send(da>>8);
  SPI2_Send(da);
}

void SPI2_UserInit( void )
{
GPIO_InitTypeDef GPIO_InitStructure;
SPI_InitTypeDef  SPI_InitStructure;

RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOB  , ENABLE);//使能GPIOB时钟
RCC_APB1PeriphClockCmd(RCC_APB1Periph_SPI2, ENABLE); //使能spi2

GPIO_InitStructure.GPIO_Pin = SPI_MASTER_SCK | SPI_MASTER_MO;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_PP;
GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
GPIO_Init(GPIOB, &GPIO_InitStructure);

GPIO_InitStructure.GPIO_Pin = SPI_MASTER_MI;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IN_FLOATING;
GPIO_Init(GPIOB, &GPIO_InitStructure);

//GPIO_SetBits(GPIOB , SPI_MASTER_SCK | SPI_MASTER_MO |SPI_MASTER_MI);

/* SPI2 configuration ------------------------------------------------------*/
/* SPI2 configuration ------------------------------------------------------*/
SPI_Cmd(SPI2, DISABLE); //必须先disable，才能改变MODE
SPI_InitStructure.SPI_Direction = SPI_Direction_2Lines_FullDuplex; // SPI_Direction_1Line_Tx , SPI_Direction_2Lines_FullDuplex
SPI_InitStructure.SPI_Mode = SPI_Mode_Master;
SPI_InitStructure.SPI_DataSize = SPI_DataSize_8b; // SPI_DataSize_16b SPI_DataSize_8b:SPI数据大小：发送8位帧数据结构
SPI_InitStructure.SPI_CPOL = SPI_CPOL_Low; // SCK SPI_CPOL_Low ,  SPI_CPOL_High: //设备空闲状态时同步时钟SCK的状态，High
SPI_InitStructure.SPI_CPHA = SPI_CPHA_2Edge; //CPHA=1:数据采样从第二个时钟沿开始
SPI_InitStructure.SPI_NSS = SPI_NSS_Soft; // NSS由软件控件片选 SPI_NSS_Hard SPI_NSS_Soft
SPI_InitStructure.SPI_BaudRatePrescaler = SPI_BaudRatePrescaler_8; // SPI_BaudRatePrescaler_8 SPI_BaudRatePrescaler_256
SPI_InitStructure.SPI_FirstBit = SPI_FirstBit_MSB;//SPI_FirstBit_MSB; SPI_FirstBit_LSB
SPI_InitStructure.SPI_CRCPolynomial = 7;
SPI_Init(SPI2, &SPI_InitStructure);

SPI_Cmd(SPI2, ENABLE);
}

void SPI2_Send(u8 data)
{
while (SPI_I2S_GetFlagStatus(SPI2, SPI_I2S_FLAG_TXE) == RESET); /* Wait for SPI2 Tx buffer empty */
SPI_I2S_SendData(SPI2, data );
}

void Address_set(unsigned int x1,unsigned int y1,unsigned int x2,unsigned int y2)
{
  LCD_WR_REG(0x2a);
  LCD_WR_DATA8(x1>>8);
  LCD_WR_DATA8(x1);
  LCD_WR_DATA8(x2>>8);
  LCD_WR_DATA8(x2);

  LCD_WR_REG(0x2b);
  LCD_WR_DATA8(y1>>8);
  LCD_WR_DATA8(y1);
  LCD_WR_DATA8(y2>>8);
  LCD_WR_DATA8(y2);

  LCD_WR_REG(0x2C);
}

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F103的SPI2与ILI9341显示屏控制器通信

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