I2C maths FPU - Electronic Circuits Projects Diagrams Free

Scarr · 15th November 2003, 05:21 PM

Anyone heard of anything I can use to do double-presicion maths on?

I have a PIC18F252 and need more maths power, Ideally a I2C FPU would be great.

Thanks

Scarr · 15th November 2003, 05:21 PM

Sorry

Exo · 18th November 2003, 12:24 AM

Pic's are microcontrollers, they ... control stuff and are not designed to do much math. If you want to do some serious number crunching you should be looking for a CPU system instead of a µC system

crust · 18th November 2003, 01:13 AM

There are floating point libraries available for many micros (dont know about PICs, I prefer AVRs) -- It takes many cycles. You should always evaluate your problem to make sure that floating point is really needed. for instance, converting period to frequency on the surface requires 1/t. However, if you consider that the unit of t is usually ticks, you can work out an integer approximation.

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15th November 2003, 05:21 PM	#1
Scarr	I2C maths FPU Anyone heard of anything I can use to do double-presicion maths on? I have a PIC18F252 and need more maths power, Ideally a I2C FPU would be great. Thanks

15th November 2003, 05:21 PM	#2
Scarr	Sorry about double post, IE locked up! Sorry

18th November 2003, 12:24 AM	#3
Exo	Pic's are microcontrollers, they ... control stuff and are not designed to do much math. If you want to do some serious number crunching you should be looking for a CPU system instead of a µC system

18th November 2003, 01:13 AM	#4
crust	There are floating point libraries available for many micros (dont know about PICs, I prefer AVRs) -- It takes many cycles. You should always evaluate your problem to make sure that floating point is really needed. for instance, converting period to frequency on the surface requires 1/t. However, if you consider that the unit of t is usually ticks, you can work out an integer approximation.