I am communicating with a roomba. It sends certain int-sized values (-32768 - 32767), two bytes at a time, high byte first. I am having trouble keeping the value signed when I receive it, and put the two bytes into an int variable using bit math. At the top of my code, I declare 'distance' as an int…

Casting a negative value??

system July 29, 2009, 9:30am 8

A union, neat idea!

(Though I'd have used uint16_t and uint8_t)