EEPROM写入的时候 剩余页pageremainlen的大小是怎么算的 如果数据大于页的剩余地址 数据地址加pageremainlen是什么意思

Question

U32 EED_Write(U16 address, U8* data_buf, U16 len)
{
U32 ret = EED_OK;
U16 PageRemainLen = 0;

if((address < EED_ADDRESS_SIZE) && (len != 0x00u) && (data_buf != NULL))
{
    if((DSPI_Get_State(DSPI_EEPROM) == DSPI_STATE_IDLE) && (EED_state == EED_IDLE)) 
    {
        data_addr   = address;
        data_ptr    = data_buf;
        data_length = len;          
        EED_state   = EED_WRITE;

        (void)DSPI_Send_Byte(DSPI_EEPROM,EED_INSTRUCTION_WREN,FALSE);
        (void)DSPI_Send_Byte(DSPI_EEPROM,EED_INSTRUCTION_WRITE,TRUE);
        (void)DSPI_Send_Byte(DSPI_EEPROM,(U8)((data_addr & 0xFF00u) >> 0x08u),TRUE);
        (void)DSPI_Send_Byte(DSPI_EEPROM,(U8)(data_addr & 0xFFu),TRUE);
        PageRemainLen = EED_PAGE_SIZE - (data_addr & (EED_PAGE_SIZE - 1));

        if(data_length > PageRemainLen)
        {
            (void)DSPI_Send_Data(DSPI_EEPROM, data_ptr, PageRemainLen);
            data_addr   += PageRemainLen;
            data_ptr    += PageRemainLen;
            data_length -= PageRemainLen;
        }                              
        else 
        {
            (void)DSPI_Send_Data(DSPI_EEPROM, data_ptr, data_length);
            data_length = 0;
        }
    } 
    else 
    {
        ret = EED_BUSY;
    }
}
else
{
    ret = EED_ERR;    
}

return(ret);

}