C++/Arduino programmers, can you help me understand this line of code?
I’m just starting to dip my little toe into arduinos and maybe some hobbyist robotics. I was looking at the driver for an Arduino device and I came across the following line:
#define RPLIDAR_RESP_MEASUREMENT_SYNCBIT (0×1<<0)
then there’s:
#define RPLIDAR_RESP_MEASUREMENT_CHECKBIT (0×1<<0)
If you’re doing a left bit-shift by a value of 0, what’s the point? why not just define it as “0×1”? This is a driver, so they’re defining the response from the device. It just seems very counter intuitive. I suspect that there is an important concept underlying that code that I don’t understand and since I’m not sure what that is, I’m not sure what keywords I should be searching to figure it out.
Any help would be greatly appreciated.
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Zaku
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