[SOLVED] False if Condition is Getting True in XC8 with PIC18F

[anupteke]

Hi all,

Guy's Im working on PIC18F45K22 using XC8 1.33V. My problem is

if((u16)Voltage > (u16)280)
{
	DispRYBCnt = 6;
	DispBuffer[3] = CHAR_r;
}

even Voltage Variable is less than 280 this condition is getting true. I tried this also

Voltage = 210;
if((u16)Voltage > (u16)280)
{
	DispRYBCnt = 6;
	DispBuffer[3] = CHAR_r;
}

but still 'if' condition is getting true. what is the problem. its compiler issue or what?

Kindly guide me guy's.

Thanks

 

[betwixt]

What data type is 'Voltage' originally declared as? (before the u16 cast).

Brian.

 

[anupteke]

@ Brian
voltage is declared as unsigned int (u16)

 

[bigdogguru]

How do you know the following conditional test is evaluated as true?

Voltage = 210;
if((u16)Voltage > (u16)280)
{
	DispRYBCnt = 6;
	DispBuffer[3] = CHAR_r;
}

Are you using a debugger? If so, what specific debugger are you using?


Obviously, there is a conflict in your code which we are not yet privy.

Please post or upload your entire source code, so that it maybe thoroughly examined.

Use CODE or SYNTAX tags if posting and the forum servers, Managed Attachment feature, if uploading.


BigDog

 

[andre_luis]

It's probably not the case, but check if the default radix of compiler is decimal.

 

[zuisti]

I'm not using XC8 but I do not think that the casting of a numeric constant is correct.
Try this out:

Voltage = 210;
if (Voltage > 280) // or 280u ???
{
....
}

 

[anupteke]

It was happening because of Timer Interrupt. Solved.