Question on SPI Data out on PortC.7(pic18f4550)

[tacbanon]

I'm trying to figure it out this block of code from SDFS how to make disable hardware SPI.

' Initialize some values for the following subroutines
	SDC_UseHardSPI = TRUE	' Use hardware SSP port for SPI.
	DISK_mount = FALSE	' The card has not been initialized.
	FAT_mode = "r"		' Read mode if not otherwise specified.
	FAT_count = 0		' Default character count to 0.

' Skip over SD/MMC/FAT subroutines
	Goto SkipSD


' Subroutines for communicating with an SD/MMC card
' Subroutine to initialize SD card pins
InitIO:
	SD_CS = 1		' SD card not selected.
	SD_CS_TRIS = 0		' Output SD card chip select.
	SD_CD_TRIS = 1		' Input card detect.

	SDO = 1			' Start SPI data out high.
	SDO_TRIS = 0		' Output SPI data out.
	SDI_TRIS = 1		' Input SPI data in.
	SCL = 1			' SPI clock idles high.
	SCL_TRIS = 0		' Output SPI clock.
	Return


' Subroutine to initialize hardware SSP for SPI at less than 400kHz
OpenSPIM:
	If (SDC_UseHardSPI) Then
		SSPSTAT = %00000000	' Sample at middle of data output time, Mode 1, 1: Transmit on idle to active clock transition.
		SSPCON1 = %00010010	' SPI master mode, clock = Fosc/64, Mode 1, 1: Clock idle high.
		SSPEN = 1		' Enable hardware SPI port.
	Endif
	Return


' Subroutine to initialize hardware SSP for SPI at full speed
OpenSPIMFast:
	If (SDC_UseHardSPI) Then
		SSPSTAT = %00000000	' Sample at middle of data output time, Mode 1, 1: Transmit on idle to active clock transition.
		SSPCON1 = %00010000	' SPI master mode, clock = Fosc/64, Mode 1, 1: Clock idle high.
		SSPEN = 1		' Enable hardware SPI port.
	Endif
	Return


' Subroutine to release hardware SSP from SPI
CloseSPIM:
	If (SDC_UseHardSPI) Then
		SSPEN = 0		' Disable hardware SPI port.
	Endif
	Return

But not really sure what to do? Hope anyone can help out...

/tacbanon

[HenrikOlsson]

Hi,
I've never used that code but I'd probably try SDC_UseHardwareSPI = FALSE.
However, don't change the SDFS.pbp file. INCLUDE it in your program and ADD SDC_UseHardwareSPI = FALSE after including it (see the example) - it will "overwrite" the default setting.

/Henrik.

[tacbanon]

Hi Henrik,
Thanks for the response, I will try it and post here my result.

Kind regards,
tacbanon

[mackrackit]

/Henrik is correct.

This example may help.
http://www.picbasic.co.uk/forum/cont...USB-SD-LOGGING
I did comment out the pin alias in SDFS so I could change things around in my code without bothering with opening the include.

[tacbanon]

@Dave
Sorry for the late reply...thanks for the link..got it to work now.

/tacbanon