stm32f103 sht20，接不接传感器都显示128.多的值！请各位大神指教一下，那里有问题？

在网上找的 SHT20 的程序，我只修改了端口由PB6、PB7也成了 PB10、PB11
可运行后，读出的值为128.多，温湿度的值都不变。
好像接不接传感器都显示128.多  的值！
请各位大神指教一下，那里有问题？谢谢

.h 的设置，我只改了前3行

#define SHT2x_I2C_PORT       GPIOB
#define SHT2x_SCL_PIN          GPIO_Pin_10       //6
#define SHT2x_SDA_PIN          GPIO_Pin_11       //7

#define SHT2x_SCL_HIGH()       GPIO_SetBits(SHT2x_I2C_PORT, SHT2x_SCL_PIN)
#define SHT2x_SCL_LOW()       GPIO_ResetBits(SHT2x_I2C_PORT, SHT2x_SCL_PIN)

#define SHT2x_SDA_HIGH()         GPIO_SetBits(SHT2x_I2C_PORT, SHT2x_SDA_PIN)
#define SHT2x_SDA_LOW()       GPIO_ResetBits(SHT2x_I2C_PORT, SHT2x_SDA_PIN)

#define SHT2x_SCL_STATE()    GPIO_ReadInputDataBit(SHT2x_I2C_PORT, SHT2x_SCL_PIN)
#define SHT2x_SDA_STATE()    GPIO_ReadInputDataBit(SHT2x_I2C_PORT, SHT2x_SDA_PI

.c 初始化函数，我只加了 RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOB , ENABLE);这一句

void SHT2x_Init(void)
{
GPIO_InitTypeDef GPIO_InitStructure;

      RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOB , ENABLE);

GPIO_InitStructure.GPIO_Pin =  SHT2x_SCL_PIN | SHT2x_SDA_PIN;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_Out_OD;
GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
GPIO_Init(SHT2x_I2C_PORT, &GPIO_InitStructure);

SHT2x_SCL_HIGH();
SHT2x_SDA_HIGH();

SHT2x_Delay(80);

SHT2x_SoftReset();
}