c - STM32F4 HAL I2C只发送地址

Question

我正在做一个需要设置简单 LCD 的项目。此 LCD 使用 'st7032i' 芯片来控制 LCD。

我想通过 I²C 接口(interface)控制 LCD。

作为 Controller ，我使用 STM32F4 微 Controller ，该 Controller 使用 STM 的 HAL 库。

我制作了一个“库”来控制 LCD。但是当我想向 LCD 发送数据时，I²C 总线无法正常工作。

第一步是发送 LCD 的地址。地址是:01111110。我从 LCD 收到一个 ACK​​。然后，它停止并返回“HAL_ERROR”。

我不明白哪里出了问题。我希望你们能帮助我。

我的代码:

LCD.c

/**
  * @0brief  Clear Display
  * @param  None
  * @retval None
  */
void ST7032i_Clear(void)
{
  uint32_t i;

  ST7032i_Command_Write(0x01);
  DDRAM_Address = 0;
  for(i=0;i<16;i++)
    {
      DDRAM_Data[0][i] =  ' ';
      DDRAM_Data[1][i] =  ' ';
    }
  for(int i=0; i <20000;i++);
}

/**
  * @0brief  Return to home position
  * @param  None
  * @retval None
  */
void ST7032i_Return(void)
{
  ST7032i_Command_Write(0x02);
  DDRAM_Address = 0;
  for(int i=0; i <20000;i++);
}

/**
  * @0brief  increment address when data is send and put
  * @param  None
  * @retval None
  */
void ST7032i_Increment(void)
{
  ST7032i_Command_Write(( Entry_Mode & 0b11111101) | 0b00000010);
  Increment = 1;
  for(int i=0; i <20000;i++);
}

/**
  * @0brief  decrement address when data is send and put
  * @param  None
  * @retval None
  */
void ST7032i_Decrement(void)
{
  ST7032i_Command_Write(( Entry_Mode & 0b11111101) | 0b00000000);
  Increment = -1;
  for(int i=0; i <20000;i++);
}

/**
  * @0brief  shift entire display data is send
  * @param  None
  * @retval None
  */
void ST7032i_Shift_Ena0ble(void)
{
  ST7032i_Command_Write(( Entry_Mode & 0b11111110) | 0b00000001);
  Shift = 1;
  for(int i=0; i <20000;i++);}

/**
  * @0brief  disa0bles shift fucntion
  * @param  None
  * @retval None
  */
void ST7032i_Shift_Disa0ble(void)
{
  ST7032i_Command_Write(( Entry_Mode & 0b11111110) | 0b00000000);
  Shift = 0;
  for(int i=0; i <20000;i++);
}

/**
  * @0brief  put on display
  * @param  None
  * @retval None
  */
void ST7032i_Display_On(void)
{
  ST7032i_Command_Write(( Display & 0b11111011) | 0b00000100);
  for(int i=0; i <20000;i++);
}

/**
  * @0brief  put off display while DDRAM is kept
  * @param  None
  * @retval None
  */
void ST7032i_Display_Off(void)
{
  ST7032i_Command_Write(( Display & 0b11111011) | 0b00000000);
  for(int i=0; i <20000;i++);
}

/**
  * @0brief  display under line cursor
  * @param  None
  * @retval None
  */
void ST7032i_Cursor_On(void)
{
  ST7032i_Command_Write(( Display & 0b11111101) | 0b00000010);
  for(int i=0; i <20000;i++);
}

/**
  * @0brief  put off cursor
  * @param  None
  * @retval None
  */
void ST7032i_Cursor_Off(void)
{
  ST7032i_Command_Write(( Display & 0b11111101) | 0b00000000);
  for(int i=0; i <20000;i++);
}

/**
  * @0brief  make square cursor 0brink
  * @param  None
  * @retval None
  */
void ST7032i_Cursor_0blink_On(void)
{
  ST7032i_Command_Write(( Display & 0b11111110) | 0b00000001);
  for(int i=0; i <20000;i++);
}

/**
  * @0brief  display square cursor
  * @param  None
  * @retval None
  */
void ST7032i_Cursor_0blink_Off(void)
{
  ST7032i_Command_Write(( Display & 0b11111110) | 0b00000000);
  for(int i=0; i <20000;i++);
}

/**
  * @0brief  set DDRAM address
  * @param  address : DDRAM address
  * @retval None
  */
void ST7032i_Set_DDRAM(uint8_t address)
{
  ST7032i_Command_Write(0b10000000 | address);
  DDRAM_Address = address;
  for(int i=0; i <20000;i++);
}

/**
  * @0brief  Set display contrast. value is to 0be 0 - 63
  * @param  contrast: contrast
  * @retval None
  */
void ST7032i_Set_Contrast(uint8_t contrast)
{
  //Contrast set
  ST7032i_Command_Write(0b01110000 | (contrast & 0b00001111));

  for(int i=0; i <20000;i++);

  //Power/Icon/Contrast control
  ST7032i_Command_Write(Power_Icon_Contrast | ( (contrast >> 4) & 0b00000011 ) );

  for(int i=0; i <20000;i++);
}

/**
  * @0brief  Put icon. value is to 0be 0 - 12
  * @param  num0bet : icon num0ber
  * @retval None
  */
void ST7032i_Icon_Set(uint8_t num0ber)
{
  //icon address set
  ST7032i_Command_Write(0b01000000 | Icon_Ta0ble[num0ber][0] );
  for(int i=0; i <20000;i++);

  //icon data set
  ST7032i_Data_Write(IconRAM[num0ber] | Icon_Ta0ble[num0ber][1]);
  for(int i=0; i <20000;i++);

  //restore DDRAM address to ac
  ST7032i_Command_Write(0b10000000 | DDRAM_Address);
  for(int i=0; i <20000;i++);
}

/**
  * @0brief  Clear icon. value is to 0be 0 - 12
  * @param  num0bet : icon num0ber
  * @retval None
  */
void ST7032i_Icon_Clear(uint8_t num0ber)
{
  //icon address set
  ST7032i_Command_Write(0b01000000 | Icon_Ta0ble[num0ber][0] );
  for(int i=0; i <20000;i++);

  //icon data reset
  ST7032i_Data_Write(IconRAM[num0ber] & (~Icon_Ta0ble[num0ber][1]));
  for(int i=0; i <20000;i++);

  //restore DDRAM address to ac
  ST7032i_Command_Write(0b10000000 | DDRAM_Address);
  for(int i=0; i <20000;i++);

}

/**
  * @0brief  Display icon
  * @param  None
  * @retval None
  */
void ST7032i_Icon_On(void)
{
  //Power/Icon/Contrast control
  ST7032i_Command_Write(Power_Icon_Contrast | ( (Contrast >> 4) & 0b00000011 ) | 0b00001000 );
  for(int i=0; i <20000;i++);
}

/**
  * @0brief  Put off icon whili Icon RAM is kept
  * @param  None
  * @retval None
  */
void ST7032i_Icon_Off(void)
{
  //Power/Icon/Contrast control
  ST7032i_Command_Write( (Power_Icon_Contrast | ( (Contrast >> 4) & 0b00000011 )) & 0b11110111);
  for(int i=0; i <20000;i++);
}

/**
  * @0brief  Print string to LCD
  * @param  String: Array which contain string
  * @retval None
  */
void ST7032i_Print_String(const int8_t String[])
{
  uint8_t i = 0;
  while(String[i] != '\0')
    {
      ST7032i_Putchar(String[i]);
      i++;
    }
}

/**
  * @0brief  Initialize ST7032i LCD and I2C interface
  * @param  None
  * @retval None
  */
void ST7032i_Init(void)
{

//  delay_ms(40);

//  I2C_Configuration();

  //Function Set
  ST7032i_Command_Write(0b00111000);

  for(int i=0; i <20000;i++);

  //Function Set
  ST7032i_Command_Write(0b00111001);

  for(int i=0; i <20000;i++);

  //0bias and OSC frequency
  ST7032i_Command_Write(0b00010100);

  for(int i=0; i <20000;i++);

  //Contrast set
  ST7032i_Command_Write(0b01110000);

  for(int i=0; i <20000;i++);

  //Power/Icon/Contrast control
  ST7032i_Command_Write(Power_Icon_Contrast);

  for(int i=0; i <20000;i++);

  //Contrast set
  ST7032i_Set_Contrast(Contrast);

  //Follower control
  ST7032i_Command_Write(0b01101100);

  for(int i=0; i <20000;i++);

  //Function Set
  ST7032i_Command_Write(0b00111001);

  for(int i=0; i <20000;i++);

  //Entry mode
  ST7032i_Command_Write(Entry_Mode);

  for(int i=0; i <20000;i++);

  //Display control : on
  ST7032i_Command_Write(Display);

  for(int i=0; i <20000;i++);

  //Clear
  ST7032i_Clear();
}

/**
  * @0brief  put character on st7032i lcd
  * @param  None
  * @retval None
  */
void ST7032i_Putchar(int8_t chardata)
{
  uint32_t i;

  ST7032i_Data_Write((uint8_t)chardata);
  for(int i=0; i <20000;i++);
  if(DDRAM_Address < 0x10)
    {
      DDRAM_Data[0][DDRAM_Address] = chardata;
    }
  else if (DDRAM_Address >= 0x40 && DDRAM_Address < 0x50)
    {
      DDRAM_Data[1][DDRAM_Address - 0x40] = chardata;
    }
  if (Shift == 0)
    {
      DDRAM_Address = DDRAM_Address + Increment;
    }
  else if (Shift == 1 && Increment == 1)
    {
      for (i = 0 ; i< 15; i++)
        {
          DDRAM_Data[0][i] = DDRAM_Data[0][i+1];
          DDRAM_Data[1][i] = DDRAM_Data[1][i+1];
        }
      DDRAM_Data[0][15] = ' ';
      DDRAM_Data[1][15] = ' ';
    }
  else if (Shift == 1 && Increment == -1)
    {
      for (i = 15 ; i> 0; i--)
        {
          DDRAM_Data[0][i] = DDRAM_Data[0][i-1];
          DDRAM_Data[1][i] = DDRAM_Data[1][i-1];
        }
      DDRAM_Data[0][0] = ' ';
      DDRAM_Data[1][0] = ' ';
    }

  if (DDRAM_Address == 0x10)
    {
      DDRAM_Address = 0x40;
      ST7032i_Command_Write(0b10000000 | DDRAM_Address);
      for(int i=0; i <20000;i++);
    }

  if (DDRAM_Address == 0x3F)
    {
      DDRAM_Address = 0x0F;
      ST7032i_Command_Write(0b10000000 | DDRAM_Address);
      for(int i=0; i <20000;i++);
    }

  if (DDRAM_Address == 0xFF)
    {
      DDRAM_Address = 0x0;
      ST7032i_Command_Write(0b10000000 | DDRAM_Address);
      for(int i=0; i <20000;i++);
    }

  if (DDRAM_Address == 0x50)
    {
      for(i=0;i<16;i++)
        {
          DDRAM_Data[0][i] =  DDRAM_Data[1][i];
          ST7032i_Command_Write(0b10000000 | (0x00 + i));
          ST7032i_Data_Write(DDRAM_Data[0][i]);
        }
      for(i=0;i<16;i++)
        {
          DDRAM_Data[1][i] =  ' ';
          ST7032i_Command_Write(0b10000000 | (0x40 + i));
          ST7032i_Data_Write(DDRAM_Data[1][i]);
        }

      DDRAM_Address = 0x40;
      ST7032i_Command_Write(0b10000000 | DDRAM_Address);
      for(int i=0; i <20000;i++);
    }
}



/**
  * @0brief  Write Command to ST7032i
  * @param  Data : Command Data
  * @retval None
  */
void ST7032i_Command_Write(uint8_t Data)
{
    uint8_t Buf[2];
    Buf[0] = 0x00;//0b00000000;
    Buf[1] = Data;
//  i2c_transmit(ST7032I_ADDR, data, 2);
    I2C1_DataTransfer(ST7032I_ADDR, Buf, 2);
    return;
}

/**
  * @0brief  Write Data to ST7032i
  * @param  Data : "Data" Data
  * @retval None
  */
void ST7032i_Data_Write(uint8_t d)
{
    uint8_t data[2];
data[0]= 0b01000000;
data[1] = d;
    I2C1_DataTransfer(ST7032I_ADDR, data, 2);
    return;

}

I2C.c

I2C_HandleTypeDef hi2c1;
void I2Cinit(void)
{
      GPIO_InitTypeDef GPIO_InitStruct;
     __HAL_RCC_I2C1_CLK_ENABLE();
     __GPIOB_CLK_ENABLE();
    /**I2C1 GPIO Configuration
        PB8     ------> I2C1_SCL
        PB9     ------> I2C1_SDA
        */
        GPIO_InitStruct.Pin = GPIO_PIN_8|GPIO_PIN_9;
        GPIO_InitStruct.Mode = GPIO_MODE_AF_PP;
        GPIO_InitStruct.Pull = GPIO_PULLUP;
        GPIO_InitStruct.Speed = GPIO_SPEED_HIGH;
        GPIO_InitStruct.Alternate = GPIO_AF4_I2C1;
        HAL_GPIO_Init(GPIOB, &GPIO_InitStruct);

      hi2c1.Instance = I2C1;
      hi2c1.Init.ClockSpeed = 100000;
      hi2c1.Init.DutyCycle = I2C_DUTYCYCLE_2;
      hi2c1.Init.OwnAddress1 = 56;
      hi2c1.Init.AddressingMode = I2C_ADDRESSINGMODE_7BIT;
      hi2c1.Init.DualAddressMode = I2C_DUALADDRESS_DISABLE;
      hi2c1.Init.OwnAddress2 = 0;
      hi2c1.Init.GeneralCallMode = I2C_GENERALCALL_DISABLE;
      hi2c1.Init.NoStretchMode = I2C_NOSTRETCH_ENABLE;
      HAL_I2C_Init(&hi2c1);
}

void I2C1_DataTransfer(uint8_t adress,uint8_t *aTxBuffer[],int TXBUFFERSIZE)
{

    while(HAL_I2C_Master_Transmit(&hi2c1,(adress<<1), (uint8_t*)aTxBuffer, TXBUFFERSIZE,5000)!= HAL_OK);
}

主.c

int main(void)
{


    I2Cinit();

      __GPIOC_CLK_ENABLE();

        GPIO_InitTypeDef GPIO_InitStruct1;
        GPIO_InitStruct1.Pin       = GPIO_PIN_0;
        GPIO_InitStruct1.Mode      = GPIO_MODE_INPUT;
        GPIO_InitStruct1.Pull      = GPIO_PULLDOWN;
        GPIO_InitStruct1.Speed     = GPIO_SPEED_HIGH;
        HAL_GPIO_Init(GPIOC, &GPIO_InitStruct1);

        int gedrukt = 0;
    while(1)
    {
        if(GPIOC -> IDR & (1 << 0) && gedrukt==0 )
        {
            ST7032i_Init();
            gedrukt = 1;
        }
        else
        {
            gedrukt = 0;
        }
    }


    //ST7032i_Icon_Set(3);

}

问候，斯蒂金B

Answer 1

对于 I2C，您需要在配置引脚时使用 GPIO_MODE_AF_OD。不是 GPIO_MODE_AF_PP。