用DHT11，显示屏幕为oled,用keil开发，请提供相关代码

以下是使用DHT11传感器和OLED显示屏的Keil代码示例：

#include <stdio.h>
#include <string.h>
#include "stm32f1xx_hal.h"
#include "ssd1306.h"
#include "fonts.h"

#define DHT11_PIN GPIO_PIN_5
#define DHT11_PORT GPIOA

static void SystemClock_Config(void);
static void MX_GPIO_Init(void);
static void MX_USART1_UART_Init(void);

void Delay_us(uint32_t us)
{
    uint32_t ticks = us * (SystemCoreClock / 1000000U);
    while (ticks--);
}

void DHT11_Start(void)
{
    HAL_GPIO_WritePin(DHT11_PORT, DHT11_PIN, GPIO_PIN_RESET);
    Delay_us(18000);
    HAL_GPIO_WritePin(DHT11_PORT, DHT11_PIN, GPIO_PIN_SET);
    Delay_us(40);
}

uint8_t DHT11_Check_Response(void)
{
    uint8_t response = 0;
    uint16_t timeout = 0xFFFF;

    while (!response && timeout--)
    {
        if (!HAL_GPIO_ReadPin(DHT11_PORT, DHT11_PIN))
        {
            response = 1;
            while (!HAL_GPIO_ReadPin(DHT11_PORT, DHT11_PIN));
        }
    }

    return response;
}

uint8_t DHT11_Read_Byte(void)
{
    uint8_t byte = 0;
    for (uint8_t i = 0; i < 8; i++)
    {
        byte <<= 1;
        while (HAL_GPIO_ReadPin(DHT11_PORT, DHT11_PIN));
        Delay_us(30);
        if (HAL_GPIO_ReadPin(DHT11_PORT, DHT11_PIN))
        {
            byte |= 1;
        }
        while (!HAL_GPIO_ReadPin(DHT11_PORT, DHT11_PIN));
    }
    return byte;
}

void DHT11_Read_Data(uint8_t *humidity, uint8_t *temperature)
{
    uint8_t data[5];
    memset(data, 0, sizeof(data));

    DHT11_Start();

    if (DHT11_Check_Response())
    {
        for (uint8_t i = 0; i < 5; i++)
        {
            data[i] = DHT11_Read_Byte();
        }

        if ((data[0] + data[1] + data[2] + data[3]) == data[4])
        {
            *humidity = data[0];
            *temperature = data[2];
        }
    }
}

I2C_HandleTypeDef hi2c1;

void OLED_Init(void)
{
    HAL_Delay(100);
    ssd1306_Init(&hi2c1);
    ssd1306_Fill(Black);
    ssd1306_UpdateScreen(&hi2c1);
}

void OLED_Show_String(uint8_t x, uint8_t y, char *str)
{
    ssd1306_SetCursor(x, y);
    ssd1306_WriteString(str, Font_7x10, White);
    ssd1306_UpdateScreen(&hi2c1);
}

int main(void)
{
    HAL_Init();
    SystemClock_Config();
    MX_GPIO_Init();
    MX_USART1_UART_Init();

    hi2c1.Instance = I2C1;
    hi2c1.Init.ClockSpeed = 400000;
    hi2c1.Init.DutyCycle = I2C_DUTYCYCLE_2;
    hi2c1.Init.OwnAddress1 = 0;
    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_DISABLE;
    if (HAL_I2C_Init(&hi2c1) != HAL_OK)
    {
        Error_Handler();
    }

    OLED_Init();

    uint8_t humidity, temperature;

    while (1)
    {
        DHT11_Read_Data(&humidity, &temperature);

        char str[20];
        sprintf(str, "Humidity: %d%%", humidity);
        OLED_Show_String(0, 0, str);

        sprintf(str, "Temp: %dC", temperature);
        OLED_Show_String(0, 15, str);

        HAL_Delay(5000);
    }
}

void SystemClock_Config(void)
{
    RCC_OscInitTypeDef RCC_OscInitStruct;
    RCC_ClkInitTypeDef RCC_ClkInitStruct;

    __HAL_RCC_PWR_CLK_ENABLE();
    __HAL_PWR_VOLTAGESCALING_CONFIG(PWR_REGULATOR_VOLTAGE_SCALE1);

    RCC_OscInitStruct.OscillatorType = RCC_OSCILLATORTYPE_HSE;
    RCC_OscInitStruct.HSEState = RCC_HSE_ON;
    RCC_OscInitStruct.HSEPredivValue = RCC_HSE_PREDIV_DIV1;
    RCC_OscInitStruct.PLL.PLLState = RCC_PLL_ON;
    RCC_OscInitStruct.PLL.PLLSource = RCC_PLLSOURCE_HSE;
    RCC_OscInitStruct.PLL.PLLMUL = RCC_PLL_MUL9;
    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_PLLCLK;
    RCC_ClkInitStruct.AHBCLKDivider = RCC_SYSCLK_DIV1;
    RCC_ClkInitStruct.APB1CLKDivider = RCC_HCLK_DIV2;
    RCC_ClkInitStruct.APB2CLKDivider = RCC_HCLK_DIV1;
    if (HAL_RCC_ClockConfig(&RCC_ClkInitStruct, FLASH_LATENCY_2) != HAL_OK)
    {
        Error_Handler();
    }
}

static void MX_USART1_UART_Init(void)
{
    __HAL_RCC_USART1_CLK_ENABLE();

    GPIO_InitTypeDef GPIO_InitStruct;
    GPIO_InitStruct.Pin = GPIO_PIN_9 | GPIO_PIN_10;
    GPIO_InitStruct.Mode = GPIO_MODE_AF_PP;
    GPIO_InitStruct.Pull = GPIO_NOPULL;
    GPIO_InitStruct.Speed = GPIO_SPEED_FREQ_HIGH;
    HAL_GPIO_Init(GPIOA, &GPIO_InitStruct);

    USART_HandleTypeDef huart1;
    huart1.Instance = USART1;
    huart1.Init.BaudRate = 115200;
    huart1.Init.WordLength = USART_WORDLENGTH_8B;
    huart1.Init.StopBits = USART_STOPBITS_1;
    huart1.Init.Parity = USART_PARITY_NONE;
    huart1.Init.Mode = USART_MODE_TX_RX;
    huart1.Init.HwFlowCtl = USART_HWCONTROL_NONE;
    huart1.Init.OverSampling = USART_OVERSAMPLING_16;
    if (HAL_USART_Init(&huart1) != HAL_OK)
    {
        Error_Handler();
    }
}

void MX_GPIO_Init(void)
{
    GPIO_InitTypeDef GPIO_InitStruct;

    __HAL_RCC_GPIOA_CLK_ENABLE();

    GPIO_InitStruct.Pin = DHT11_PIN;
    GPIO_InitStruct.Mode = GPIO_MODE_OUTPUT_PP;
    GPIO_InitStruct.Speed = GPIO_SPEED_FREQ_HIGH;
    HAL_GPIO_Init(DHT11_PORT, &GPIO_InitStruct);
}

请注意，此代码示例仅供参考。 您需要根据自己的硬件和需求进行修改。