同志们,能否推荐PCI的书啊,急,急啊

流沙雨 · 发表于 2003-11-22 08:51:37

那我说了，很多的，做好思想准备啊

流沙雨 · 发表于 2003-11-22 09:32:50

[这个贴子最后由流沙雨在 2003/11/22 09:38am 第 1 次编辑]

１.ＰＣＩ命令寄存器的各位定义：ＢＩＴ０控制对ＩＯ空间的访问，我从ＤＥＭＯ板上看过来是禁止设备响应的，而我个人认为应该是允许的；而ＢＩＴ１也是禁止设备对存储空间的访问，如果说是禁止设备响应ＩＯ空间是因为使用它会造成未来配置的困难，那么后者呢？
２.当PCI设备检测到数据奇偶错误时，交易继续进行。会影响下位机的操作吗？譬如说精确度？
３.采用渐进工作有以下两个好处，1）减少了由每个输出驱动所产生的地电流负载（弱的输出）
2）减少同时开关的信号量（强的输出）那为什么不采用呢？
４.为什么空间0寄存器总线描述器的总线宽度定义为16位外，空间寄存器１３总线描述器的总线宽度都定义为是8位而空间2寄存器定义为３２位呢？
５.为什么基地址寄存器总是一个定义为ＩＯ空间控制，然后另一个定义为存储空间，如此交替进行呢？
６.如果我想使用ＰＬＸＭＯＮ控制局部总线输出一些信号，该怎么控制呢？
先这么多吧，谢谢你！

laoge · 发表于 2003-11-25 01:25:40

1)IO space and memory space are seperated. The chip provides this function for your convenience rather than neccesary requirement. You can decide wheather those bits should be set or not. By the way, all of the IO and Memory space should bot overlap each other, so either enable or disable the IO or memory access has nothing to do with the configuration.
2) I don't understand your question well. please explain in more detail.
3) same to 2. I only have English datasheet. so I don't not what 渐进工作 is.
4) I didn't see anything as you mentioned in the datasheet. PCI is a 32bit bus (both address and data). The data width is defined by the c/BE[3:0]. I guess what you mentioned is not what the data sheet defines. More likely they are software related. For software, this kind of definition is for programming convenience.
5) I don't think it's a requirement of the chip.
6) I don't know because I don't have ＰＬＸＭＯＮ. sorry.

流沙雨 · 发表于 2003-11-25 09:03:13

谢谢你,我想我还是再琢磨琢磨再说吧

xiaofeiwen · 发表于 2006-5-15 17:34:39

send me mail: xiaofeiwen@163.com

同志们,能否推荐PCI的书啊,急,急啊