topic sscanf problem in 8-bit Microcontrollers

sscanf problem

freddyka — Tue, 12 Jun 2012 15:18:58 GMT

Hi,

i have a problem with using sscanf. I want to convert a hexdezimal ASCII Code to an integer. If i use it in main(), everything works, but if i put in in an event like AS1_OnRxChar() it does not work. Sometimes there are the wrong results, somtimes the program "hangs".

My code is like:

void AS2_OnRxChar(void)
{
...
char in[] = "CD";
int i;
...

sscanf(in, "%x", &i);

...

}

The variable i should be 205, but it does not work!!!

Can sombody help me? What is my mistake?

Best Regards

freddyka

Re: sscanf problem

CompilerGuru — Wed, 13 Jun 2012 09:39:30 GMT

Sounds like a stack overflow. Increase the STACK_SIZE in the prm file.

Re: sscanf problem

freddyka — Fri, 15 Jun 2012 16:24:17 GMT

Hi,

if i change the Stack-size sometime it runs better, sometimes not. It seems, that is the problem. But what size is necessary for the Stack? Where can i see the used RAM? My microcontroller is the MC9S08DZ60.

Thank you for an answer,

freddyka