hi! All: I am using RTLinuxV2.0 on a CNC project. The interpolation program download trajactory infomation whose length is constant, to real-time controller through rt-FIFO. My question is: Can I find out how many data left in the rtFIFO? or if not, is there any solutions? Thanks leo _____________________________________________ 首都在线--中国人的网上家园 http://www.263.net @263.net中国最大的在线邮局 http://freemail.263.net