Serial.print

Development Boards Arduino
1

Can anyone explain why Serial.print(“,MakeSoundAndMotion”);

on the UNO gives me this on the monitor: MakeSoundAndMotion126110136127154

The baud rates are matched and most of the other data is clean.

Looks almost like the old DOS stuff when a string was missing a terminator.

I thought it might be too much RAM usage, but I’m only counting 319 bytes.

Thank you,

Joe

2

Make it println instead of print. Do the numbers shift down a line? If so, you have an extra print statement in there. If not, show all your code.

Does the comma really not show up in the print?

3

Sorry about that – the comma does show. I just missed it because I’m using it in a csv file and didn’t see it. How about the stack? Do you know how much room is allocated for that normally? I used to mess with the stack in assembly, but like this higher stuff a lot better! I’m going to line up calls and see if they might be too deep. println and print produce the same results.

Thank you for your suggestions.

4

Stack should be fine for such a simple case.

Assuming it’s not an issue with nested function calls in your program.

We see here only one line of code.

On AVRs, there’s a way to force C strings to be in flash and not copied to RAM, to save some RAM.

5

Thank you for the information. I have found that I have four nested calls in one situation. That strikes me as a little deep for the poor little UNO, so I am doing a bit of a rewrite to cut it back. Again, thank you.

6

Turns out it’s the programmer’s error. That would be me! Again, thank you,.

7

time to graduate to Teensy 3.1!! Arduino-compatible 32bit ARM M4

http://www.pjrc.com/teensy/index.html

8

Looks good. I have a ministry with kids, part of which is teaching electronics and programming to control hardware. Think the Teensy 3.1 could aid in that? Currently I base part of it on my Listening Tree

http://www.jameco.com/webapp/wcs/stores … 2173714_-1

and Listening Car

http://www.jameco.com/webapp/wcs/stores … 2199551_-1

I tell kids that I would like to see them design an autonomous bicycle someday – not easy, but I think doable.

Thank you for your help and advise. I have been programming in C for almost 30 years but still make dumb mistakes at times, and being 70 doesn’t help!

Joe