I2C连接的设备是TPS65185
I2C_InitTypeDef  I2C_InitStructure;
int main(void)
{
    SystemInit();
    RCC_APB2PeriphClockCmd(RCC_GPIO_USE, ENABLE);
    RCC_APB1PeriphClockCmd(RCC_APB1Periph_I2C1, ENABLE);
    PM_PWRUP_H;
    PM_WAKEUP_H;
    
    /* Enable I2C1 ----------------------------------------------------*/
    I2C_Cmd(I2C1, ENABLE);
    /* I2C1 configuration ------------------------------------------------------*/
    I2C_InitStructure.I2C_Mode = I2C_Mode_I2C;
    I2C_InitStructure.I2C_DutyCycle = I2C_DutyCycle_2;
    I2C_InitStructure.I2C_OwnAddress1 = 0x01;
    I2C_InitStructure.I2C_Ack = I2C_Ack_Enable;
    I2C_InitStructure.I2C_AcknowledgedAddress = I2C_AcknowledgedAddress_7bit;
    I2C_InitStructure.I2C_ClockSpeed = 100000;
    I2C_Init(I2C1, &I2C_InitStructure);    
    
    
     /*----- First transmission Phase -----*/
    /* Send I2C1 START condition */
    I2C_GenerateSTART(I2C1, ENABLE);
    /* Test on I2C1 EV5 and clear it */
    while(!I2C_CheckEvent(I2C1, I2C_EVENT_MASTER_MODE_SELECT));     
   
    /* Send I2C1 slave Address for write */
    I2C_Send7bitAddress(I2C1, 0x68, I2C_Direction_Transmitter);
    /* Test on I2C1 EV6 and clear it */
    while(!I2C_CheckEvent(I2C1, I2C_EVENT_MASTER_TRANSMITTER_MODE_SELECTED));  运行到这里就过不去了，  总是没有回应; 请问哪里出现问题, 谢谢！
    /* Send Command */
    I2C_SendData(I2C1, 0x01);
    while(!I2C_CheckEvent(I2C1, I2C_EVENT_MASTER_BYTE_TRANSMITTED));
    
    /* Send I2C1 STOP Condition */
    I2C_GenerateSTOP(I2C1, ENABLE);
}

建议使用模拟E2，很多网友都遇到过这样的问题。好像是I2C模块的问题。

模拟E2是什么?