STM32作为i2c从机没有应答信号

Linuxtom

大家好：
目前将STM32作为i2c从机，已经收到地址匹配，且进入了地址匹配中断，但是没有发出应答信号，可能是什么原因？
i2c初始化已经允许应答信号，如下是I2C初始化代码：
void I2C_CONFIGRATION(){
       

  I2C_InitTypeDef         I2C_InitStructure;
        GPIO_InitTypeDef  GPIO_InitStructure;
        NVIC_InitTypeDef         NVIC_InitStructure;
       
       
        RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOB, ENABLE);
       
        RCC_APB1PeriphClockCmd(RCC_APB1Periph_I2C1, ENABLE);
        GPIO_InitStructure.GPIO_Pin = GPIO_Pin_6 | GPIO_Pin_7;
        GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
        GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_OD;
        GPIO_Init(GPIOB, &GPIO_InitStructure);
       
        /*********** I2C periphral configuration **********/
        I2C_DeInit(I2C1);
        I2C_InitStructure.I2C_Mode = I2C_Mode_I2C; // fixed
        I2C_InitStructure.I2C_DutyCycle = I2C_DutyCycle_2; // fixed
        I2C_InitStructure.I2C_OwnAddress1 = 0x24; // user parameter
        I2C_InitStructure.I2C_Ack = I2C_Ack_Enable; // fixed
        I2C_InitStructure.I2C_AcknowledgedAddress = I2C_AcknowledgedAddress_7bit;
        I2C_InitStructure.I2C_ClockSpeed = I2C_Speed; // user parameter
        I2C_AcknowledgeConfig(I2C1, ENABLE);  
        //I2C1->CR1 |= I2C_CR1_ACK;
        I2C_Cmd(I2C1, ENABLE);
        I2C_Init(I2C1, &I2C_InitStructure);
        I2C_ITConfig(I2C1, I2C_IT_EVT | I2C_IT_BUF , ENABLE);
       
        NVIC_InitStructure.NVIC_IRQChannel = I2C1_EV_IRQn ;
        NVIC_InitStructure.NVIC_IRQChannelSubPriority = 0;
        NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 0;
        NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;
        NVIC_Init(&NVIC_InitStructure);
        NVIC_InitStructure.NVIC_IRQChannel = I2C2_ER_IRQn;
        NVIC_InitStructure.NVIC_IRQChannelSubPriority = 0;
        NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 0;
        NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;
        NVIC_Init(&NVIC_InitStructure);

}