050硬件IIC发送256-510BYTE

南沟的水

//stm32f050 hardware IIC send 256--510 Bytes
void MASTER2_Write(uint8_t* pBuffer,uint16_t NumByteToWrite)
{      
    uint8_t Num=255;
    uint8_t NumOfSingle=NumByteToWrite-255;
    /* Configue CR2 : Slave Address ,NBYTES, write request and RELOAD */
    I2C1->CR2=SlaveAddress|(255<<16)|(0<<10)|(1<<24);
    I2C1->CR2|=(1<<13);//START

    while (Num--)
    {         
        /* Wait until TXIS flag is set */
        while(!(I2C1->ISR &(1<<1)));  
        /* Write data to TXDR */
        I2C1->TXDR= *(pBuffer++);
    }
//    while(I2C1->ISR&(1<<6));
    while(!I2C1->ISR&(1<<7));//TCR=1
    Delay_ms(1);//????????????????????????????????????????????????????????????????????????????????????????????????????
    /* Update CR2 : set Slave Address, ,NBYTES, write request and Autoend mode */
    I2C1->CR2=SlaveAddress|(NumOfSingle<<16)|(1<<25);
    while(I2C1->ISR&(1<<7));//TCR=0
    while (NumOfSingle--)
    {      
        /* Wait until TXIS flag is set */
        while( !(I2C1->ISR &(1<<1)) );  
        /* Write data to TXDR */
        I2C1->TXDR= *(pBuffer++);
    }     
    /* Wait until STOPF flag is set */
    while( !(I2C1->ISR &(1<<5)) );
    /* Clear STOPF flag */
    I2C1->ICR|=(1<<5);
}
这里我自己加了个延时，如果不加，就不能正常发送。为什么？不应该要加延时啊。
求教青风大哥

mqqjqr5566

青风大哥呢