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标题: 为什么每次得到的返回值都是OXFF.... [打印本页]

作者: reporter 时间: 2013-10-25 11:08 标题: 为什么每次得到的返回值都是OXFF....

unsigned char get_data_from_ROM()
{
&nbsp; &nbsp;&nbsp; &nbsp;&nbsp;&nbsp;unsigned char i = 0;
&nbsp; &nbsp;&nbsp; &nbsp;&nbsp;&nbsp;unsigned char in = 0;
unsigned char temp =0;
&nbsp; &nbsp;&nbsp; &nbsp;&nbsp;&nbsp;//Rom_SCK_SET;&nbsp;&nbsp;
&nbsp;&nbsp;for(i=0;i&lt;8;i++)
&nbsp; &nbsp;&nbsp; &nbsp;&nbsp;&nbsp;{&nbsp; &nbsp;&nbsp; &nbsp;&nbsp;&nbsp;
Rom_OUT = 1;
Rom_SCK_SET;&nbsp; &nbsp;
&nbsp; &nbsp;&nbsp; &nbsp;&nbsp; &nbsp;&nbsp; &nbsp;&nbsp; &nbsp; Rom_SCK_CLR;
&nbsp; &nbsp;&nbsp; &nbsp;&nbsp; &nbsp;&nbsp; &nbsp;&nbsp; &nbsp; in = (in&lt;&lt;1);
//Rom_SCK_SET;
temp = Rom_OUT;
if (temp == 1)
{
in = in | 0x01;
}
&nbsp; &nbsp;&nbsp; &nbsp;&nbsp;&nbsp;}&nbsp; &nbsp;
&nbsp; &nbsp;&nbsp; &nbsp;&nbsp;&nbsp;return(in);

}
我用以上代码获取单个数据，但是每次得到的返回值都是OXFF....

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