我正在阅读涉及一些按位操作的代码,如下所示:
unsigned char data = 0;
unsigned char status = 0;
//DAQmx functions for reading data
DAQmxReadDigitalLines(taskHandleIn,1,10.0,DAQmx_Val_GroupByChannel,dataIn,8,&read,&bytesPerSamp,NULL);
DAQmxReadDigitalLines(taskHandleOut,1,10.0,DAQmx_Val_GroupByChannel,dataOutRead,8,&read,&bytesPerSamp,NULL);
for (int i = 0; i < 8; i++)
{
if (dataOutRead[i] == 1)
data = data | (0x01 << i);
else
data = data & ~(0x01 << i);
}
for (int i = 0; i < 4; i++)
{
if (dataIn[i] == 1)
status = status | (0x01 << (7 - i));
else
status = status & ~(0x01 << (7 - i));
}
ctrl = 0;
在上述代码中,dataOutRead
和dataIn
都是uInt8
8元素数组,最初初始化为零。
我不太清楚代码实际上在做什么?有人可以告诉我这些代码吗?