2个驱动DS18B20传感器的STM32F103怎样将温度值发送到I2C总线上

要将两个DS18B20传感器的温度值从两个STM32F103发送到同一条I2C总线上，您可以使用以下示例代码：

#include "stm32f10x.h"
#include "ds18b20.h"
#include "i2c.h"

// Define the I2C address of the master device
#define I2C_MASTER_ADDR 0x30

// Define the I2C address of the temperature sensor 1
#define TEMP_SENSOR1_ADDR 0x48

// Define the I2C address of the temperature sensor 2
#define TEMP_SENSOR2_ADDR 0x49

int main(void) {
    // Initialize the DS18B20 sensors
    ds18b20_init();

    // Initialize the I2C interface
    i2c_init();

    // Start a temperature conversion for sensor 1
    ds18b20_convert();

    // Wait for the conversion to complete
    while (!ds18b20_conversion_done()) {
        // Do nothing
    }

    // Read the temperature value from sensor 1
    float temperature1;
    ds18b20_read(&temperature1);

    // Convert the temperature value to an array of bytes
    uint8_t temp_bytes1[2];
    temp_bytes1[0] = (uint8_t) temperature1;
    temp_bytes1[1] = (uint8_t) ((temperature1 - temp_bytes1[0]) * 100);

    // Start a temperature conversion for sensor 2
    ds18b20_convert();

    // Wait for the conversion to complete
    while (!ds18b20_conversion_done()) {
        // Do nothing
    }

    // Read the temperature value from sensor 2
    float temperature2;
    ds18b20_read(&temperature2);

    // Convert the temperature value to an array of bytes
    uint8_t temp_bytes2[2];
    temp_bytes2[0] = (uint8_t) temperature2;
    temp_bytes2[1] = (uint8_t) ((temperature2 - temp_bytes2[0]) * 100);

    // Send the temperature values over I2C
    uint8_t i2c_data[5];
    i2c_data[0] = TEMP_SENSOR1_ADDR << 1;
    i2c_data[1] = temp_bytes1[0];
    i2c_data[2] = temp_bytes1[1];
    i2c_data[3] = TEMP_SENSOR2_ADDR << 1;
    i2c_data[4] = temp_bytes2[0];
    i2c_data[5] = temp_bytes2[1];
    i2c_send(I2C_MASTER_ADDR, i2c_data, 6);

    return 0;
}

请注意，这只是一个示例代码，您需要根据您的具体应用程序进行修改。同时，您需要确保正确配置I2C总线的硬件连接和电气特性，以确保数据可以正确地传输。