[Oap-discuss] issue reading odometry

[Scott C. <rob...@gm...>]

Hi Dafydd,

I'm not receiving valid odometry data from the "read_odometry" function in
oap-motor.c.  However, the i2s_smbus_read_block returns exactly 5 bytes.

Can  you tell me if pin 14, Vcc, on the 74HC74 (U3 and U4) need to be
connected to +5V?

Some references:
1. 74HC74 datasheet for a 74HC74 with preset and clear:
http://www.fairchildsemi.com/ds/MM/MM74HC74A.pdf

2. odometry input signals
http://www.openautomaton.org/index.php/MCM

3. Your original oap 0.1 schematic and my rework for pcb design are here:
http://www.openautomaton.org/index.php/Schematics

Thanks for your help.
--scott