STM32F4使用SPI驱动LCD

2019-07-20 19:14发布

使用STM32F4通过SPI驱动LCD只能点亮背光，不能写数字和其他文字，不知道什么原因，请大家帮忙看一下LCD初始化和SPI初始化是否对了？
void SPI2_Init(void)
{
  GPIO_InitTypeDef  GPIO_InitStructure;
  SPI_InitTypeDef  SPI_InitStructure;

  RCC_AHB1PeriphClockCmd(RCC_AHB1Periph_GPIOB, ENABLE);//ê1ÄüGPIOBê±Öó
  RCC_APB1PeriphClockCmd(RCC_APB1Periph_SPI2, ENABLE);//ê1ÄüSPI1ê±Öó

GPIO_PinAFConfig(GPIOB,GPIO_PinSource12,GPIO_AF_SPI2);
GPIO_PinAFConfig(GPIOB,GPIO_PinSource13,GPIO_AF_SPI2); //PB4¸′óÃÎa SPI1
GPIO_PinAFConfig(GPIOB,GPIO_PinSource14,GPIO_AF_SPI2); //PB5¸′óÃÎa SPI1
GPIO_PinAFConfig(GPIOB,GPIO_PinSource15,GPIO_AF_SPI2);

  //GPIOFB3,4,53õê¼»ˉéèÖÃ
  GPIO_InitStructure.GPIO_Pin = GPIO_Pin_12|GPIO_Pin_13|GPIO_Pin_14|GPIO_Pin_15;//PB3~5¸′óÃ1|Äüêä3ö
  GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF;//¸′óÃ1|Äü
  GPIO_InitStructure.GPIO_OType = GPIO_OType_PP;//íÆíìêä3ö
  GPIO_InitStructure.GPIO_Speed = GPIO_Speed_100MHz;//100MHz
  GPIO_InitStructure.GPIO_PuPd = GPIO_PuPd_UP;//éÏà-
  GPIO_Init(GPIOB, &GPIO_InitStructure);//3õê¼»ˉ

// GPIO_SetBits(GPIOB, GPIO_Pin_12|GPIO_Pin_13|GPIO_Pin_14|GPIO_Pin_15);

// GPIO_PinAFConfig(GPIOB,GPIO_PinSource13,GPIO_AF_SPI2); //PB4¸′óÃÎa SPI1
// GPIO_PinAFConfig(GPIOB,GPIO_PinSource14,GPIO_AF_SPI2); //PB5¸′óÃÎa SPI1
// GPIO_PinAFConfig(GPIOB,GPIO_PinSource15,GPIO_AF_SPI2);

//ÕaàïÖ»Õë¶ÔSPI¿ú3õê¼»ˉ
RCC_APB1PeriphResetCmd(RCC_APB1Periph_SPI2,ENABLE);//¸′Î»SPI1
RCC_APB1PeriphResetCmd(RCC_APB1Periph_SPI2,DISABLE);//í￡Ö1¸′Î»SPI1

SPI_InitStructure.SPI_Direction = SPI_Direction_2Lines_FullDuplex;  //éèÖÃSPIμ￥Ïò»òÕßË«ÏòμÄêy¾YÄ￡ê½:SPIéèÖÃÎaË«ÏßË«Ïòè«Ë«1¤
SPI_InitStructure.SPI_Mode = SPI_Mode_Master; //éèÖÃSPI1¤×÷Ä￡ê½:éèÖÃÎaÖ÷SPI
SPI_InitStructure.SPI_DataSize = SPI_DataSize_8b; //éèÖÃSPIμÄêy¾Y′óD¡:SPI·￠Ëí½óêÕ8Î»Ö¡½á11
SPI_InitStructure.SPI_CPOL = SPI_CPOL_High; //′®DDí¬2½ê±ÖóμÄ¿ÕÏD×′ì¬Îa¸ßμçÆ½
SPI_InitStructure.SPI_CPHA = SPI_CPHA_2Edge; //′®DDí¬2½ê±ÖóμÄμú¶t¸öìø±äÑØ￡¨éÏéy»òÏÂ½μ￡©êy¾Y±»2éÑù
SPI_InitStructure.SPI_NSS = SPI_NSS_Soft; //NSSDÅoÅóéó2¼t￡¨NSS1ü½Å￡©»1êÇèí¼t￡¨ê1óÃSSIÎ»￡©1üàí:Äú2¿NSSDÅoÅóDSSIÎ»¿ØÖÆ
SPI_InitStructure.SPI_BaudRatePrescaler = SPI_BaudRatePrescaler_256; //¶¨òå2¨ìØÂêÔ¤·ÖÆμμÄÖμ:2¨ìØÂêÔ¤·ÖÆμÖμÎa256
SPI_InitStructure.SPI_FirstBit = SPI_FirstBit_MSB; //Ö¸¶¨êy¾Y′«êä′óMSBÎ»»1êÇLSBÎ»¿aê¼:êy¾Y′«êä′óMSBÎ»¿aê¼
SPI_InitStructure.SPI_CRCPolynomial = 7; //CRCÖμ¼ÆËãμÄ¶àÏîê½
SPI_Init(SPI2, &SPI_InitStructure);  //¸ù¾YSPI_InitStructÖDÖ¸¶¨μÄ2Îêy3õê¼»ˉíaéèSPIx¼Ä′æÆ÷

SPI_Cmd(SPI2, ENABLE); //ê1ÄüSPIíaéè

// SPI2_ReadWriteByte(0xff);//Æô¶ˉ′«êä

}

void LCD_Init(void)
{

GPIO_InitTypeDef  GPIO_InitStructure;
  RCC_AHB1PeriphClockCmd(RCC_AHB1Periph_GPIOB, ENABLE);
RCC_AHB1PeriphClockCmd(RCC_AHB1Periph_GPIOC, ENABLE);

GPIO_InitStructure.GPIO_Pin = GPIO_Pin_10|GPIO_Pin_1;
  GPIO_InitStructure.GPIO_Mode = GPIO_Mode_OUT;//ÆÕí¨êä3öÄ￡ê½
  GPIO_InitStructure.GPIO_OType = GPIO_OType_PP;//íÆíìêä3ö
  GPIO_InitStructure.GPIO_Speed = GPIO_Speed_100MHz;//100MHz
  GPIO_InitStructure.GPIO_PuPd = GPIO_PuPd_UP;//éÏà-
  GPIO_Init(GPIOB, &GPIO_InitStructure);//3õê¼»ˉ

GPIO_InitStructure.GPIO_Pin = GPIO_Pin_6;
  GPIO_InitStructure.GPIO_Mode = GPIO_Mode_OUT;//ÆÕí¨êä3öÄ￡ê½
  GPIO_InitStructure.GPIO_OType = GPIO_OType_PP;//íÆíìêä3ö
  GPIO_InitStructure.GPIO_Speed = GPIO_Speed_100MHz;//100MHz
  GPIO_InitStructure.GPIO_PuPd = GPIO_PuPd_UP;//éÏà-
  GPIO_Init(GPIOC, &GPIO_InitStructure);//3õê¼»

SPILCD_RST_RESET ; //LCD_RST=0    //SPI½ó¿ú¸′Î»
delay_ms(20); // delay 20 ms
  SPILCD_RST_SET ; //LCD_RST=1
delay_ms(20);

lcddev.width=240;
lcddev.height=320;
lcddev.wramcmd=0X2C;
lcddev.setxcmd=0X2A;
lcddev.setycmd=0X2B;

      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(0xCF);
      LCD_WR_DATA8(0x00);
      LCD_WR_DATA8(0xC1);
      LCD_WR_DATA8(0X30);

      LCD_WR_REG(0xE8);
      LCD_WR_DATA8(0x85);
      LCD_WR_DATA8(0x00);
      LCD_WR_DATA8(0x78);

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

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

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

      LCD_WR_REG(0xC0); //Power control
      LCD_WR_DATA8(0x23); //VRH[5:0]

      LCD_WR_REG(0xC1); //Power control
      LCD_WR_DATA8(0x10); //SAP[2:0];BT[3:0]

      LCD_WR_REG(0xC5); //VCM control
      LCD_WR_DATA8(0x3e); //¶Ô±è¶èμ÷½ú
      LCD_WR_DATA8(0x28);

      LCD_WR_REG(0xC7); //VCM control2
      LCD_WR_DATA8(0x86);  //--

      LCD_WR_REG(0x36); // Memory Access Control
      LCD_WR_DATA8(0x48); //C8    //48 68êúÆá//28 E8 oáÆá

      LCD_WR_REG(0x3A);
      LCD_WR_DATA8(0x55);

      LCD_WR_REG(0xB1);
      LCD_WR_DATA8(0x00);
      LCD_WR_DATA8(0x18);

      LCD_WR_REG(0xB6); // Display Function Control
      LCD_WR_DATA8(0x08);
      LCD_WR_DATA8(0x82);
      LCD_WR_DATA8(0x27);

      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(0x31);
      LCD_WR_DATA8(0x2B);
      LCD_WR_DATA8(0x0C);
      LCD_WR_DATA8(0x0E);
      LCD_WR_DATA8(0x08);
      LCD_WR_DATA8(0x4E);
      LCD_WR_DATA8(0xF1);
      LCD_WR_DATA8(0x37);
      LCD_WR_DATA8(0x07);
      LCD_WR_DATA8(0x10);
      LCD_WR_DATA8(0x03);
      LCD_WR_DATA8(0x0E);
      LCD_WR_DATA8(0x09);
      LCD_WR_DATA8(0x00);

      LCD_WR_REG(0XE1); //Set Gamma
      LCD_WR_DATA8(0x00);
      LCD_WR_DATA8(0x0E);
      LCD_WR_DATA8(0x14);
      LCD_WR_DATA8(0x03);
      LCD_WR_DATA8(0x11);
      LCD_WR_DATA8(0x07);
      LCD_WR_DATA8(0x31);
      LCD_WR_DATA8(0xC1);
      LCD_WR_DATA8(0x48);
      LCD_WR_DATA8(0x08);
      LCD_WR_DATA8(0x0F);
      LCD_WR_DATA8(0x0C);
      LCD_WR_DATA8(0x31);
      LCD_WR_DATA8(0x36);
      LCD_WR_DATA8(0x0F);

      LCD_WR_REG(0x11); //Exit Sleep
      delay_ms(120);

      LCD_WR_REG(0x29); //Display on
      LCD_WR_REG(0x2c);
      LCD_Clear(WHITE);

}

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