Difference between revisions of "User:Pau pajuelo"

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m (Compile example program)
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* Copy binary file to IGEP Board
 
* Copy binary file to IGEP Board
 +
 +
== Execute program ==
 +
Open a remote terminal and locate your program binary:
 +
<pre>root@igep00x0:~# ./gpio_example 157 </pre>
 +
Result will be:
 +
<pre>root@igep00x0:~# ./gpio_example 157
 +
gpio/direction: No such file or directory
 +
 +
poll() GPIO 157 interrupt occurred
 +
............. </pre>

Revision as of 18:30, 14 September 2012

TODO:

Update peripheral tutorials, finish gpio example program

Categorize new tutorials

Finish tutorials below

How to manage the kernel modules on Linux

How do I edit my kernel command line

Basic Software instructions

igep.ini parameters

The kernel command line syntax is name=value1. These next parameters are supported in igep.ini since IGEP-X_Loader 2.4.0-2:

[kernel]

Parameter Name Description Default value Comments
kaddress Kernel copy address =0x80008000 Hex memory address
rdaddress Ram Disk location address =0x81600000 Hex memory address;
disabled by default
serial.low Serial number (low part) =00000001 Numeric
serial.high Serial number (high part) =00000000 Numeric
revision Revision ID =0003 Numeric
kImageName Kernel, binary image name =zImage Kernel or binary image name
kRdImageName Kernel RAM Disk Image Name - Ram Disk image name
MachineID Machine ID (kernel ID)  ;IGEPv2
=2344
 ;Module
=2717
;Proton
=3203
Mode Boot Mode  ;Linux kernel
=kernel
 ;Other image (like uboot)
[binary image]

[kparams]

Parameter Name Description Default value Comments
buddy Enable/disable expansion board support  ;IGEPv2 Expansion Board support
=igep0022
 ;Berlin and Paris Expansion Board support
=base0010
New York Expansion
=ilms0015
console Setup the kernel console parameters =ttyO2,115200n8 -
earlyprintk Enable early printk - -
mem Setup the Board Memory Configuration =430M -
boot_delay Setup the boot delay =0 -
mpurate Setup ARM Processor Speed - -
loglevel Setup the loglevel - -
debug Enable kernel debug output - -
fixrtc Fix RTC variable - -
nocompcache Configure nocompcache variable =1 -
omapfb.mode Configure frame bugger configuration =dvi:hd720-16@50  ;Other configuration
=dvi:1280x720MR-16@60
vram Configure Video RAM assigned to every frame buffer - -
omapfb.vram Configure Video RAM assigned to every frame buffer - -
omapfb.debug Configure frame buffer debug output - -
omapdss.debug Configure DSS Video debug output - -
smsc911x.mac0 Configure Board Ethernet Mac Address =0xb2,0xb0,0x14,0xb5,0xcd,0xde For IGEP BERLIN
smsc911x.mac1 Configure Board Ethernet Mac Address =0xb2,0xb0,0x14,0xb5,0xcd,0xdf For IGEP BERLIN (only with IGEP PROTON)
smsc911x.mac Configure Board Ethernet Mac Address =0xb2,0xb0,0x14,0xb5,0xcd,0xde For IGEPv2, IGEP PROTON, IGEP PARIS and IGEP BERLIN
ubi.mtd Fot UBI FS boot - -
root Configure root directory for MMC, NFS or UBI  ;For mmc memory
=/dev/mmcblk0p2 rw rootwait
 ;For flash memory
=/dev/mtdblock2
nfsroot For NFS boot - -
rootfstype For UBI FS boot - -
ip For NFS boot - -
init Assign init program - -
musb_hdrc.debug USB debug - -
musb_hdrc.use_dma USB over network - -
libertas.libertas_debug Configure libertas debug - -
board.ei485 Enable/disable RS485  ;Enable RS485
=yes
 ;Disable RS485
=no
board.modem Enable/disable GPRS modem  ;Enable modem (IGEPv2 Expansion)
=no
 ;Enable modem (IGEPv2 Expansion)
=yes
buddy.revision Enable hardware buddy revision [A or B] Only for base0010
=A
Only for base0010
=B

How to use GPIOs (update it)

Overview

This How-To is meant to be a starting point for people to learn use GPIOs for IGEP devices as quickly and easily as possible. For this how-to i used IGEP firmware Yocto

There are more ways to use GPIOs, but this one is very simple.

Feedback and Contributing

At any point, if you see a mistake you can contribute to this How-To.

Requirements

For this How-to, i used:

  • IGEPv2 Board
  • GPIO example

Example program

Example program contains some libraries to control GPIOs, libraries can do:

  • Export and unexport GPIOs
  • Set GPIO direction
  • Set GPIO value
  • Get GPIO value
  • Configure hardware interrupts

Example program configures a GPIO to wait a hardware interrupt. Once the GPIO value change from 0 to 1 (rising), program give you a message. This program needs a GPIO peripheral parameter, for example GPIO 157.

Compile example program

Download an Install IGEP SDK if you don't have it.

First of all you need to initialize a suitable environment in the bash shell console inside your machine.
You can do this sourcing once the environment-setup script.

jdoe@ubuntu ~ $ source /opt/poky/1.2/environment-setup-armv7a-vfp-neon-poky-linux-gnueabi 
  • Download source code
  • Extract souce code
  • Build arm binary executable:

Cross toolchain tools are available into the built-in virtual machine Poky SDK. You only need open bash terminal prompt and write commands:

jdoe@ubuntu ~/Desktop $ arm-poky-linux-gnueabi-gcc -o gpio_example gpio_examplebeta1.c
  • Copy binary file to IGEP Board

Execute program

Open a remote terminal and locate your program binary:

root@igep00x0:~# ./gpio_example 157 

Result will be:

root@igep00x0:~# ./gpio_example 157
gpio/direction: No such file or directory

poll() GPIO 157 interrupt occurred
.............