【STM32WB09KE测评】-基础任务3-IIC外设驱动

从STM32WB09KE的数据手册看到，片上外设包含一个I2C：

System peripherals
– 1x DMA controller with 8 channels supporting ADC, SPI, I2C, USART, LPUART, Timers
– 1x SPI with I2S interface multiplexed–
– 1x I2C (SMBus/PMBus)
– 1x LPUART (low power)
– 1x USART (ISO 7816 smartcard mode, IrDA, SPI master and modbus)
– 1x independent WDG
– 1x real time clock (RTC)
– 1x independent SysTick
– 1x 16-bit, four channels general purpose timer
– 2x 16-bit, two channels general purpose timer
– Infrared interface


从开发板原理图，在母版的CN4连接器上引出了I2C功能引脚。
I2C_SCL PB6 D15 GPIO28
I2C_SDA PB7 D14 GPIO29



因此可以用来驱动I2C接口的屏幕：



接下来初始化I2C模块，

复制

static void MX_I2C1_Init(void)

{



  /* USER CODE BEGIN I2C1_Init 0 */



  /* USER CODE END I2C1_Init 0 */



  /* USER CODE BEGIN I2C1_Init 1 */



  /* USER CODE END I2C1_Init 1 */

  hi2c1.Instance = I2C1;

  hi2c1.Init.Timing = 0x00303D5B;

  hi2c1.Init.OwnAddress1 = 0;

  hi2c1.Init.AddressingMode = I2C_ADDRESSINGMODE_7BIT;

  hi2c1.Init.DualAddressMode = I2C_DUALADDRESS_DISABLE;

  hi2c1.Init.OwnAddress2 = 0;

  hi2c1.Init.OwnAddress2Masks = I2C_OA2_NOMASK;

  hi2c1.Init.GeneralCallMode = I2C_GENERALCALL_DISABLE;

  hi2c1.Init.NoStretchMode = I2C_NOSTRETCH_DISABLE;

  if (HAL_I2C_Init(&hi2c1) != HAL_OK)

  {

    Error_Handler();

  }



  /** Configure Analogue filter

  */

  if (HAL_I2CEx_ConfigAnalogFilter(&hi2c1, I2C_ANALOGFILTER_ENABLE) != HAL_OK)

  {

    Error_Handler();

  }



  /** Configure Digital filter

  */

  if (HAL_I2CEx_ConfigDigitalFilter(&hi2c1, 0) != HAL_OK)

  {

    Error_Handler();

  }

  /* USER CODE BEGIN I2C1_Init 2 */



  /* USER CODE END I2C1_Init 2 */



}

初始化RTC模块，

复制

static void MX_RTC_Init(void)

{



  /* USER CODE BEGIN RTC_Init 0 */



  /* USER CODE END RTC_Init 0 */



  RTC_TimeTypeDef sTime = {0};

  RTC_DateTypeDef sDate = {0};



  /* USER CODE BEGIN RTC_Init 1 */



  /* USER CODE END RTC_Init 1 */



  /** Initialize RTC Only

  */

  hrtc.Instance = RTC;

  hrtc.Init.HourFormat = RTC_HOURFORMAT_24;

  hrtc.Init.AsynchPrediv = 127;

  hrtc.Init.SynchPrediv = 255;

  hrtc.Init.OutPut = RTC_OUTPUT_DISABLE;

  hrtc.Init.OutPutPolarity = RTC_OUTPUT_POLARITY_HIGH;

  if (HAL_RTC_Init(&hrtc) != HAL_OK)

  {

    Error_Handler();

  }



  /* USER CODE BEGIN Check_RTC_BKUP */



  /* USER CODE END Check_RTC_BKUP */



  /** Initialize RTC and set the Time and Date

  */

  sTime.Hours = 0x12;

  sTime.Minutes = 0x0;

  sTime.Seconds = 0x0;

  sTime.SubSeconds = 0x0;

  sTime.DayLightSaving = RTC_DAYLIGHTSAVING_NONE;

  sTime.StoreOperation = RTC_STOREOPERATION_RESET;

  if (HAL_RTC_SetTime(&hrtc, &sTime, RTC_FORMAT_BCD) != HAL_OK)

  {

    Error_Handler();

  }

  sDate.WeekDay = RTC_WEEKDAY_FRIDAY;

  sDate.Month = RTC_MONTH_NOVEMBER;

  sDate.Date = 0x08;

  sDate.Year = 0x24;



  if (HAL_RTC_SetDate(&hrtc, &sDate, RTC_FORMAT_BCD) != HAL_OK)

  {

    Error_Handler();

  }

  /* USER CODE BEGIN RTC_Init 2 */



  /* USER CODE END RTC_Init 2 */



}

主程序：

复制

int main(void)

{



  /* USER CODE BEGIN 1 */



  /* USER CODE END 1 */



  /* MCU Configuration--------------------------------------------------------*/



  /* Reset of all peripherals, Initializes the Flash interface and the Systick. */

  HAL_Init();



  /* USER CODE BEGIN Init */



  /* USER CODE END Init */



  /* Configure the system clock */

  SystemClock_Config();



  /* Configure the peripherals common clocks */

  PeriphCommonClock_Config();



  /* USER CODE BEGIN SysInit */



  /* USER CODE END SysInit */



  /* Initialize all configured peripherals */

  MX_GPIO_Init();

  MX_I2C1_Init();

  MX_RTC_Init();

  /* USER CODE BEGIN 2 */

  OLED_Init();

  OLED_Refresh();

  HAL_Delay(500);

  /* USER CODE END 2 */



  /* Initialize leds */

  BSP_LED_Init(LED_BLUE);

  BSP_LED_Init(LED_GREEN);

  BSP_LED_Init(LED_RED);



  /* Initialize USER push-button, will be used to trigger an interrupt each time it's pressed.*/

  BSP_PB_Init(B1, BUTTON_MODE_EXTI);

  BSP_PB_Init(B2, BUTTON_MODE_EXTI);

  BSP_PB_Init(B3, BUTTON_MODE_EXTI);



  /* Initialize COM1 port (115200, 8 bits (7-bit data + 1 stop bit), no parity */

  BspCOMInit.BaudRate   = 115200;

  BspCOMInit.WordLength = COM_WORDLENGTH_8B;

  BspCOMInit.StopBits   = COM_STOPBITS_1;

  BspCOMInit.Parity     = COM_PARITY_NONE;

  BspCOMInit.HwFlowCtl  = COM_HWCONTROL_NONE;

  if (BSP_COM_Init(COM1, &BspCOMInit) != BSP_ERROR_NONE)

  {

    Error_Handler();

  }



  /* Infinite loop */

  /* USER CODE BEGIN WHILE */

  printf("\r\n LED, Button, COM all Init Done");

  while (1)

  {



    /* USER CODE END WHILE */



    /* USER CODE BEGIN 3 */

          static uint8_t i;

          printf("\r\n idle main loop, current date: %s, current time: %s", aShowDate, aShowTime);

          //printf("\r\nOLED TEST MODE: CLEAR SCREEN AND REFRESH WITH 1000ms DELAY. (%d)", i++);

          OLED_Clear();

          OLED_ShowString(0,0,"OLED SIMPLE CLOCK",8,1);

          OLED_ShowString(0,12,"STM32 WB09KE",8,1);

          OLED_ShowString(12,24,"BBS.21IC ST",16,1);

          OLED_ShowString(0,48,aShowDate,8,1);

          OLED_ShowString(80,48,aShowTime,8,1);

          OLED_Refresh();





          RTC_CalendarShow(aShowTime, aShowDate);



          HAL_Delay(100);

  }

  /* USER CODE END 3 */

}

烧录，最终效果：

在开始IIC外设驱动开发之前，确保你已经完成了开发环境的搭建，包括IDE、编译器、固件库和中间件的安装