Quote Originally Posted by Kenjones1935 View Post
rich, you mention rd0 - rd4 on the PIC32. I was hoping to see reference of that kind of hardware detail in the PIC32C User's Manual. Nope. No mention of a MACRO either. I have to read the PIC32 Data Sheet? Oh dear....
Richard is the author of the StickOS operating system. Great to see him here! Yes, RD0 through RD4 are portD.0 through portD.4. They are mentioned in the data sheet, and also labeled (I think) on your board. What macro are you referring to?

I am inclined to return to this forum and PICBASIC PRO and 16F887. To work with higher speeds my car needs to know better where it is and what it is doing. It needs some rate of approach calculations and a bit of trigonometry. It needs to increase the number of SONAR triggers per second and their attendant drive wheel and steering adjustments.

I have not pushed the limits of the 16F887. I am not sure how to find them.
If I remember right, you were caught with a limit of how often you could pulse your sonars. This was made worse by using two of the same type, as you had to wait for the other to be done, as they would get false readings from eachother's echo. I think there was a calculation done way back on this thread about how many feet you would travel at 20mph before you had data back. If I am correct, your limiting factor was your sensors, and not your 5 million or so instructions per second 16F887 chip.

I would agree, I don't think you have pushed the limits of the 16F887. I would go back to the thread about the time your sensors take, and regroup.