SPI issue - HW or SW - Electronic Circuits Projects Diagrams Free

Kryten · 24th May 2008, 08:05 AM

Hi
I have tried to get my head around something here.
If i look in the datasheet of the 18f4550 HW SPI are pins RC0, RC1, RB7 and RA5 (the latter beeing SS)
but in CCS pic c in the project wizzard it says that pins RC3 -RC5 ans SPI -CLK -DI -DO (this is when i set it to use HWSPI)

futz · 24th May 2008, 08:28 AM

Quote:

Originally Posted by Kryten

Hi
I have tried to get my head around something here.
If i look in the datasheet of the 18f4550 HW SPI are pins RC0, RC1, RB7 and RA5 (the latter beeing SS)
but in CCS pic c in the project wizzard it says that pins RC3 -RC5 ans SPI -CLK -DI -DO (this is when i set it to use HWSPI)

Maybe the lib is bit-banging SPI instead of using hardware? Just write it yourself. You don't need a lib to do SPI. It's super easy with the hardware SPI. Very similar to hardware RS232 to write code for.

Kryten · 24th May 2008, 08:30 AM

Well since im trying to use some sort of FAT16 lib i need the init routines and they are different in mikroC and CCS pic C

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24th May 2008, 08:05 AM	(permalink)
Kryten	SPI issue - HW or SW Hi I have tried to get my head around something here. If i look in the datasheet of the 18f4550 HW SPI are pins RC0, RC1, RB7 and RA5 (the latter beeing SS) but in CCS pic c in the project wizzard it says that pins RC3 -RC5 ans SPI -CLK -DI -DO (this is when i set it to use HWSPI) __________________ Simplicity rules Good enought - its perfect ?? 2 Gig of free online backup space Are you a Chemist?

24th May 2008, 08:30 AM	(permalink)
Kryten	Well since im trying to use some sort of FAT16 lib i need the init routines and they are different in mikroC and CCS pic C __________________ Simplicity rules Good enought - its perfect ?? 2 Gig of free online backup space Are you a Chemist?