A20-OLinuXino-LIME2 SPI master

[Alex]

Hi all,

I am trying to use SPI to communicate with SPI sensors. I have installed pyA20Lime2 python module. I am guessing A20 has 4 SPI devices and SPI0 is used for sdcard.

How can I enable SPI1, SPI2 and SPI3?

What configuration magic is needed to enable SPI devices?

Can one use two chip-selects for each SPI device?

On which pins to connect CLK, CS, MOSI, MISO? This is what i found in docs:

Code Select Expand

SPI0
CS0  PI10 PC23   GPIO-2 pin 29 PI10, GPIO-1 pin 40 PC23
CS1  PI14        GPIO-2 pin 37 PI14
CLK  PI11 PC2    GPIO-2 pin 31 PI11
MOSI PI12 PC0    GPIO-2 pin 33 PI12
MISO PI13 PC1    GPIO-2 pin 35 PI13
SPI1
CS0  PA0  PI16   GPIO-2 pin 40 PI16
CS1  PA4  PI15   GPIO-2 pin 39 PI15
CLK  PA1  PI17   GPIO-2 pin 38 PI17
MOSI PA2  PI18   GPIO-2 pin 36 PI18
MISO PA3  PI19   GPIO-2 pin 34 PI19
SPI2
CS0  PB14 PC19   GPIO-1 pin 33 PC19
CS1  PB13        GPIO-3 pin 24 PB13
CLK  PB15 PC20   GPIO-1 pin 35 PC20
MOSI PB16 PC21   GPIO-1 pin 37 PC21
MISO PB17 PC22   GPIO-1 pin 39 PC22
SPI3
CS1  PA9         GPIO-4 pin 12 PA9
CS0  PA5         ?
CLK  PA6         ?
MOSI PA7         ?
MISO PA8         ?


OS: Linux Debian 8.1
Image: a20-lime2_debian_3.4.103_Jessie_2G_release_3.img
Kernel: Linux 3.4.103-00033-g9a1cd03-dirty


Online resources are scarce, please help.

[JohnS]

On every post you need to put basic info: OS, version, etc.

John

[Alex]

Hi JohnS,

My apologies, updating question with OS details.

[SoftwareMechanic]

Hi Alex,

Sorry about the lateness of this reply, I was running into the same problem you are, and I found a helpful little tutorial.

It involves the setup of SPI using Python, assuming you're using the Debian distro as your OS.

The link is: https://pypi.python.org/pypi/pyA20Lime2

I hope this helps, even just a little.

-SM