Grazie Segio
There is no isnan in C30
I will try the other way and let you know

Regards
Stefano Vanzo


sergio masci ha scritto:
> On Sat, 25 Oct 2008, Piclist Vanzo wrote:
>
>   
>> I use it to write and read floats to an external eeprom via I2C.
>> Everthing is fine if I already have data on the eeprom. But with a new 
>> one it reads NaN (not a number) and I don't
>> have no idea of how to detect it.
>> Would like to check on setup and put in all 0x0000.
>>     
>
> I haven't used C30 but you might find something like "isnan" in math.h.
>
> so you would do something like:
>
> 	_long.data = HDReadI2CFloat(ControlByte, HighAdd, LowAdd);
>
> 	if (isnan(_long.data))
> 	{
> 		_long.data = 0;
> 	}
>
> if there is no "isnan" you could instead try:
>
> 	if (_long.data != _long.data)
>
> Regards
> Sergio Masci
>   

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