/* Free I2C_SCL and I2C_SDA */

    gpioConfigStruct.mode = GPIO_MODE_OUT;

    gpioConfigStruct.speed = GPIO_SPEED_50MHz;

    gpioConfigStruct.outtype = GPIO_OUT_TYPE_PP;

    gpioConfigStruct.pupd = GPIO_PUPD_NO;

    gpioConfigStruct.pin = GPIO_PIN_8;

    GPIO_Config(GPIOB, &gpioConfigStruct);



    gpioConfigStruct.pin = GPIO_PIN_9;

    GPIO_Config(GPIOB, &gpioConfigStruct);