printf(lcd_putc,

Chevy64 · Joined: 05 Apr 2013 Posts: 7

Hi Guys;
This is my first time to write in the forum if I have written in wrong spot please accept my apology.
Here is my simplest code:

Ttelmah · Joined: 11 Mar 2010 Posts: 19520

There are limits on most things. There are length limits on the format string, limits on the maximum number of variables allowed etc. etc..
I think you will find your whole bracket contents are exceeding 255 characters, and this is the actual 'limit'.
Remember there is nothing to stop you splitting this onto multiple lines. Do 16 per line. Also, if this is just to send a graphic character to the LCD, then:

Chevy64 · Joined: 05 Apr 2013 Posts: 7

Thank you Ttelmah;
I got you, but still have a hard time to understand.
I am printing only 26 Characters not 255,and what if I try to print different characters instead of repeating characters. How come I could exceed my quota?
Ok I made a calculations totally assumptive.. Say every character in LCD composed of 5x8 pixels and I can put 26 thus 40X26=1040 which is 1K. So I have to have 4x255 pixels. Than question is How come I can put an ordinary numbers filling up the LCD. Tried I can not.. So problem is LCD's memory becomes full. Sorry for out loudly thinking. So how to clear? Should I print one line at a time? Tnx Tnx.

Ttelmah · Joined: 11 Mar 2010 Posts: 19520

The point is that the compiler has to parse the whole statement. It is the length limit on the _statement_ that you are hitting. Think about it, you have all the individual %C's, then all the ,xxx values. All have to be handled.
Remember a line in the printf, is not a line in the display. You can do something like:

Chevy64 · Joined: 05 Apr 2013 Posts: 7

Thank you all for your prompt answer. As Ttelmah explained; despite printf is an adorable function and does arduous job it is a parser with limits. If one splits also works with 4X20 LCD by putting r\n or \n at the end. Again many thanks for your answers.