I’m hoping for advice from anyone based on basic principles and logic concerning i/o pins on the Atom Bot Board II
my cmucam3 has four TTL pins: Ground; Logic in; Logic Out; and +3.3v. The Atom bb 2 has 3 i/o pins (in a series) for pwr, gnd, and i/o.
I know I should’nt plug the +3.3v ttl wire from the cmucam into the atom bb i/o, because i may fry the cmucam, that leaves the ground and two data pins left on cmucam. If i only use ground and logic-in from cmu to bot board, that should allow me to possible send data from bb to cmucam correct? if this is the case, how can i possibly connect logic-out pin from cmucam to transmit to atom, i’m out of pins on the botboard, can i use the next data pin over on the i/o row, but wont i need another ground wire also??
You need two I/O pins on the Bot Board to give you two-way communication with the CmuCam3. You need to be able to get data from the CmuCam3 as well as send commands to it. Just do NOT connect the Bot Board power to the CmuCam3 or one or both boards will probably be damaged.
You need to connect the serial port of the CmuCam to the Bot Board.
You will need both Logic In (RX) and Logic Out (TX) and GND.
You may have to make a custom cable to make the needed connections. The serial port jumper on the CmuCam3 must be removed in order to use the Logic In/Out serial port pins.
You will have to select two pins on the Bot Board to be your Bot Board RX and TX lines. It’s good to select two concecutive pins, like P10 and P11, for instance. You need both RX and TX in order to recieve data from and transmit commands to the CmuCam, respectively.
You only need a single GND connection between boards. You can actually use any two I/O pins on the Bot Board to be your RX/TX lines.
k, i’ll just use the ttl rather than use the level-shifted serial connection from bot board to cmucam, i can then keep the abb connected to my pc so i can watch the excitement as it unfolds, i can then use logic in/out and grnd from ttl on cmu board using adjacent pins on the i/o row of abb,…thanks got it
Dale, thanks so much for takin g the time to help me out with these noob questions your help is tremondously appreciated sir!
