Raspberry PI instructions don't seem correct about how to enable SPI

[Dale Eason]

I got the video to work on raspberry pi however the instructions posted about commenting out the  drivers in the /etc/modules file do not seem right to me.

In fact if I follow them then the raspberryPi_video program will output an error stating that SPI can not be found.  So instead what I think was meant to be stated was to comment out the lines in the /etc/modprobe.d/raspi-blacklist.conf file.

Second I have a vertical line of pixels that seem to be the negative color of the lines on either side.  I have tried to run the FFC  function using the button on the RaspbieryPi_video gui interface but that just seems to hang the program.

Any help would be appreciated.  I have uploaded an example image from my camera.

Dale Eason

[W. R. Ashurst]

Greetings Dale,

I agree with you completely about the pi instructions - same experience here.  Also have the vertical line and the program hang at FFC.  If you let the module wait a bit does the vertical line become less apparent?  Mine does, but will sometimes spontaneously re-appear.

Good luck,

Bob A.

[Dale Eason]

Fixed the FFC not working.   The i2c-dev was misspelled as ic2-dev in the /etc/modules file.  As part of the debug I discovered there was no /Dev/i2c-1 device.  Which lead me to look closer at the /etc/modules file.

Now flat field works and the vertical line is gone.

Dale Eason

[jskane]

Hi,

I have the same problem and was curious where you found that there was no /dev/i2c-1 device? Where is that?

In the /etc/modules file there was nothing listed. So I added it as sudo but so far no luck.

Thanks

Jon Kane

[Dale Eason]

Just like I wrote /dev,  That is from the root of the file system.  So cd /dev and then try "ls" to see all the devices.

Dale

[Dave Brauer]

Hi, 

I am trying to bring up the raspberrypi board.  I have gotten as far as connecting the HW, installing qt, qmaking the raspberrypi_video sample code.  At first I got as far as the Red Spot, but I believe that was because I had not enabled SPI and I2C in raspi-config.   After doing so, including, making loading them in the kernel as default, when I try

sudo ./raspberrypi_video

I get 

Error - Could not open SPI device: No such file or directory

From the discussion above, it looks like I need to do something else to load the SPI and I2C modules, beyond just enabling them in raspi-config.

Reading the documentation

https://www.raspberrypi.org/forums/viewtopic.php?p=675658#p675658

suggests that raspi-config should be it.

However, I do not see any modules called anything like spi or I2C in my filesystem.

Also confirmed I have version 3.18 installed 

I also added 

i2c-dev

spidev

to /etc/modules

and saw that these module were being loaded in the boot up sequence, but I still get 

Error - Could not open SPI device: No such file or directory

Any advice would be much appreciated. 

Dave

[Dale jason]

Did you disable the "device tree" in raspi-config? That is necessary to do now as describe in the link you posted.  After that and a reboot you should see the devices in the /dev directory.

Dale

[Pierre Guinault]

In /etc/modules ,

Replace spidev with spi-bcm2708

Comment lines in file /etc/modprobe.d/raspi-blacklist.conf if there are.

Try it.