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pic program

Started by JasonL220 Jan 3, 2007 at 12:42 PM 4 replies 750+ views

Original Post

Jan 3, 2007 at 12:42 PM

i've been writing a program for a pic chip but i wont compile this:

void clearram(void)
{
	for( char x = 10; x >= 0; x-- )      // ERROR
	{
		for( char y = 5; y >= 0; y-- )
		{
			DispData[x][y] = 0;
		}
	}
}

i dont see what i've done wrong, the compiler doesn't say anthing useful. probably a stupid mistake. thanks

Nytegard

Jan 3, 2007 at 12:53 PM

Well, fixing the obvious mistakes that GDNet made (If someone could answer why do brackets and such sometimes converted that way?), everything compiled fine, assuming DispData was declared correctly globally.

Also, you might want to replace a for loop with memset or something similar.

(It might be useful if you could actually post the errors.)

rip-off

Jan 3, 2007 at 12:54 PM

So, what does the compiler say?

JasonL220

Jan 3, 2007 at 1:03 PM

the compiler says this:

Clean: Deleting intermediary and output files.
Clean: Done.
Executing: "C:\MCC18\bin\mcc18.exe" -p=18F4520 "lcd.c" -fo="lcd.o" -w3 -Ou- -Ot- -Ob- -Op- -Or- -Od- -Opa-
MPLAB C18 v3.02 (demo)
Copyright 1999-2005 Microchip Technology Inc.
Days remaining until demo becomes feature limited: 8
D:\elec\lcd.c:166:Error: syntax error
Halting build on first failure as requested.
BUILD FAILED: Wed Jan 03 19:11:40 2007

seem rather useless to me

i would use memset but i'm not sure if the pic will support it, i just wont i t to work before i try and optimize it.

thanks

rip-off

Jan 3, 2007 at 1:09 PM

Maybe you need to declare all variables at the beginning of a block? Thats something you have to do in C, IIRC.

void clearram(void){        char x, y;	for( x = 10; x >= 0; x-- )	{		for( y = 5; y >= 0; y-- )		{			DispData[x][y] = 0;		}	}}

JasonL220

Jan 3, 2007 at 1:14 PM

well i fix that error but it then showed a bunch more, thanks for the help didn't realise C did that differently. thanks

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