stm32f103c8t6控制ds18b20在OLED屏幕上显示的驱动代码

以下是基于STM32CubeIDE和HAL库的示例代码，可以在OLED上显示DS18B20的温度数据：

#include "main.h"
#include "stdio.h"
#include "stdlib.h"
#include "string.h"
#include "ds18b20.h"
#include "ssd1306.h"

#define BUFFER_SIZE 20

UART_HandleTypeDef huart2;

void SystemClock_Config(void);
static void MX_GPIO_Init(void);
static void MX_USART2_UART_Init(void);

int main(void)
{
  HAL_Init();
  SystemClock_Config();
  MX_GPIO_Init();
  MX_USART2_UART_Init();
  SSD1306_Init();

  char buffer[BUFFER_SIZE];
  float temperature;

  while (1)
  {
    temperature = DS18B20_GetTemperature();
    sprintf(buffer, "Temp: %.2f C", temperature);
    SSD1306_Fill(Black);
    SSD1306_GotoXY(0, 0);
    SSD1306_Puts(buffer, &Font_11x18, White);
    SSD1306_UpdateScreen();
    HAL_Delay(1000);
  }
}

void SystemClock_Config(void)
{
  RCC_OscInitTypeDef RCC_OscInitStruct = {0};
  RCC_ClkInitTypeDef RCC_ClkInitStruct = {0};

  RCC_OscInitStruct.OscillatorType = RCC_OSCILLATORTYPE_HSI;
  RCC_OscInitStruct.HSIState = RCC_HSI_ON;
  RCC_OscInitStruct.HSICalibrationValue = RCC_HSICALIBRATION_DEFAULT;
  RCC_OscInitStruct.PLL.PLLState = RCC_PLL_NONE;
  if (HAL_RCC_OscConfig(&RCC_OscInitStruct) != HAL_OK)
  {
    Error_Handler();
  }

  RCC_ClkInitStruct.ClockType = RCC_CLOCKTYPE_HCLK | RCC_CLOCKTYPE_SYSCLK | RCC_CLOCKTYPE_PCLK1 | RCC_CLOCKTYPE_PCLK2;
  RCC_ClkInitStruct.SYSCLKSource = RCC_SYSCLKSOURCE_HSI;
  RCC_ClkInitStruct.AHBCLKDivider = RCC_SYSCLK_DIV1;
  RCC_ClkInitStruct.APB1CLKDivider = RCC_HCLK_DIV1;
  RCC_ClkInitStruct.APB2CLKDivider = RCC_HCLK_DIV1;

  if (HAL_RCC_ClockConfig(&RCC_ClkInitStruct, FLASH_LATENCY_0) != HAL_OK)
  {
    Error_Handler();
  }
}

static void MX_USART2_UART_Init(void)
{
  huart2.Instance = USART2;
  huart2.Init.BaudRate = 115200;
  huart2.Init.WordLength = UART_WORDLENGTH_8B;
  huart2.Init.StopBits = UART_STOPBITS_1;
  huart2.Init.Parity = UART_PARITY_NONE;
  huart2.Init.Mode = UART_MODE_TX_RX;
  huart2.Init.HwFlowCtl = UART_HWCONTROL_NONE;
  huart2.Init.OverSampling = UART_OVERSAMPLING_16;
  if (HAL_UART_Init(&huart2) != HAL_OK)
  {
    Error_Handler();
  }
}

static void MX_GPIO_Init(void)
{
  GPIO_InitTypeDef GPIO_InitStruct = {0};

  __HAL_RCC_GPIOA_CLK_ENABLE();

  GPIO_InitStruct.Pin = GPIO_PIN_2;
  GPIO_InitStruct.Mode = GPIO_MODE_OUTPUT_PP;
  GPIO_InitStruct.Speed = GPIO_SPEED_FREQ_LOW;
  HAL_GPIO_Init(GPIOA, &GPIO_InitStruct);
}

void HAL_UART_MspInit(UART_HandleTypeDef *uartHandle)
{
  GPIO_InitTypeDef GPIO_InitStruct = {0};
  if (uartHandle->Instance == USART2)
  {
    __HAL_RCC_USART2_CLK_ENABLE();
    __HAL_RCC_GPIOA_CLK_ENABLE();

    GPIO_InitStruct.Pin = GPIO_PIN_2;
    GPIO_InitStruct.Mode = GPIO_MODE_AF_PP;
    GPIO_InitStruct.Speed = GPIO_SPEED_FREQ_HIGH;
    HAL_GPIO_Init(GPIOA, &GPIO_InitStruct);
  }
}

void HAL_UART_MspDeInit(UART_HandleTypeDef *uartHandle)
{
  if (uartHandle->Instance == USART2)
  {
    __HAL_RCC_USART2_CLK_DISABLE();
    HAL_GPIO_DeInit(GPIOA, GPIO_PIN_2);
  }
}

void Error_Handler(void)
{
}

#ifdef USE_FULL_ASSERT
void assert_failed(uint8_t *file, uint32_t line)
{
}
#endif

其中，DS18B20_GetTemperature()是获取DS18B20温度值的函数，需要根据具体的DS18B20驱动代码实现。SSD1306_Init()是OLED屏幕初始化函数，SSD1306_Fill()用于清屏，SSD1306_GotoXY()用于设置光标位置，SSD1306_Puts()用于在屏幕上输出字符串，SSD1306_UpdateScreen()用于更新屏幕显示。

注意，在使用DS18B20时，需要连接一个上拉电阻（4.7kΩ左右）到VDD线上，同时将DS18B20的数据线连接到一个GPIO口上，如上代码中的PA2。在初始化代码中需要将GPIO口设置为输出模式，然后调用DS18B20_Init()函数进行DS18B20的初始化。