The technicalities of AVR-LibC's streaming stdio routines are explained in the manual here:īut I agree that the information is a little "dry" and no one would probably work out how it was intended to be used if it were not for this page in the user manual:
#HOW TO TAB ONE LINE IN FPRINTF HOW TO#
How curious that a user manual might tell you how to use something eh?
I just begun reading stdio.h but it's rather large to take in an so far I haven't made much sense of anything. But next line may not mean anything in the context of a lcd like this. Ultimately what I want is being able to print stuff to the lcd shows 0b0000 0000(binary) or 0x00(for hexadecimal), is there perhaps anyone whom can enlighten me as to where I would begin mucking about with the code to result in this?īy the way, after reading about stream I thought that I read that I should NOT do it as in my example in this thread, is that true?Īnd isn't /n supposed to create a skip the the next line. Then all that is printed out to the lcd is "I am" I can't accomplish the same in my code and changing %d to %x for example DOES result in 26 being printed as 1a, but if I use: fprintf ( LCD, "I am %b years old", age ) print ( 26, DEC ) // to print 26 in decimal form print ( 26, HEX ) // to print 26 in hexadecimal form print ( 26, BIN ) // and that will print out 26 in binary form We assume the LCD has been initialized as lcd correctly according to LiquidCrystal I have been looking through that but it does not contain the stream relevant code and I can't find it, but the functionality I want to mimic is the one where in Arduino IDE you can write: Have you ever used arduino's LiquidCrystal library with it's lcd.print() function? Which prints out what I wanted it to, the lcd is know showing "I am 26 years old" minus the "" of course.īut I have read a couple of hours about stream and jet without finding an example online I would have no clue what so ever about how to accomplish this, to bad this isn't doing all I want. Which can then be used as: uint8_t age = 26 įprintf ( LCD, "I am %d years old", age ) Int lcd_putchar_printf ( char var, FILE * stream ) Static FILE str_lcd = FDEV_SETUP_STREAM ( lcd_putchar_printf, NULL, _FDEV_SETUP_WRITE ) The following code is derived from some site online: I have reacetly gotten my 20*4 char LCD display to play nice with my Xplained XMEGA A1 board but now I am trying to implement some neat way of printing to it.
0 kommentar(er)
