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怎样编写RISC指令?
用bt848做一个视频捕捉,bt848芯片上提供了RISC指令,通过RISC指令可以让采集的数据存到指定的地址里(是32位的,我想应该是指线性地址吧)并有两个相关的寄存器:RISC Program Counter, RISC Program Start Address都是32位的。是不是我用malloc分配一个空间p,在这个空间p里写相关的RISC指令,然后将*p转换为DWORD型(32位)的数据存入RISC Program Start Address就可以了?
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沙发#
发布于:2001-12-14 00:00
\"通过RISC指令可以让采集的数据存到指定的地址里(是32位的,我想应该是指线性地址吧)\"
this should be the PHYSICAL ADDRESS!!! \"然后将*p转换为DWORD型(32位)的数据存入RISC Program Start Address就可以了?\" this have to be the PHYSICAL ADDRESS too. by the way, you have to give bt848 device the physicall address if the read/write operation is initiated by bt848. |
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