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== Feedback and Contributing  ==
 
== Feedback and Contributing  ==
  
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At any point, if you see a mistake you can contribute to this How-To.<br>  
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At any point, if you see a mistake you can contribute to this How-To.<br>
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== Install binaries via IGEP<br>  ==
 
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== Testing driver  ==
 
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To make sure than driver works well, make the next test. I used GPIO_136(sdmmc2_dat4) and GPIO_137(sdmmc2_dat5) because IGEP v2 RC5(without WIFI) don't use them by default: <br>
 
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'''NOTE:''' For more information visit this [[Mux configuration|page]] (under construction). <br>
 
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=== Configure Mux  ===
 
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Go to:/sys/kernel/debug/omap_mux, and change this mux configuration:
 
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<pre>echo 0x104&gt;sdmmc2_dat4
 
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echo 0x104&gt;sdmmc2_dat5
 
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</pre>
 
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Use cat command to check it:<br>
 
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<pre>cat sdmmc2_dat4
 
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cat sdmmc2_dat5
 
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</pre>
 
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The result will be similar at that:
 
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<pre>root@localhost:/sys/kernel/debug/omap_mux# cat sdmmc2_dat4
 
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name: sdmmc2_dat4.gpio_136 (0x48002164/0x134 = 0x0104), b ae4, t NA
 
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mode: OMAP_PIN_INPUT | OMAP_MUX_MODE4
 
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signals: sdmmc2_dat4 | sdmmc2_dir_dat0 | NA | sdmmc3_dat0 | gpio_136 | NA | NA | safe_mode
 
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</pre>
 
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and
 
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<pre>root@localhost:/sys/kernel/debug/omap_mux# cat sdmmc2_dat5
 
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name: sdmmc2_dat5.gpio_137 (0x48002166/0x136 = 0x0104), b ah3, t NA
 
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mode: OMAP_PIN_INPUT | OMAP_MUX_MODE4
 
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signals: sdmmc2_dat5 | sdmmc2_dir_dat1 | cam_global_reset | sdmmc3_dat1 | gpio_137 | hsusb3_tll_stp | mm3_rxdp | safe_mode
 
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</pre>
 
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Note: OMAP_PIN_INPUT=Input/Output pin and OMAP_PIN_OUTPUT=Output pin, for Read/Write test you need the first one. GPIO is configured in mode 4.<br>
 
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=== Read/Write test  ===
 
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Link GPIO_136 and GPIO_137 with a wire, these pins are located in J990 connector with numbers 7 and 9. I use the next connector to join them:<br>
 
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{| align="center" cellspacing="1" cellpadding="1" border="1" width="200"
 
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|-
 
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| [[Image:Connector used readwrite test.JPG|center|350x230px]]
 
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|
 
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[[Image:All connected readwrite test.JPG|center|350x230px]]
 
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|}
 
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<br>
 
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Now type next code:
 
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<pre>root@localhost:~/gpio-driver/app# ./gpio input 136
 
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root@localhost:~/gpio-driver/app# ./gpio output 137 0
 
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root@localhost:~/gpio-driver/app# ./gpio get 136   
 
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0
 
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root@localhost:~/gpio-driver/app# ./gpio output 137 1
 
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root@localhost:~/gpio-driver/app# ./gpio get 136   
 
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1
 
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root@localhost:~/gpio-driver/app#
 
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</pre>
 
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The results (CMOS Voltages: 0V-1V8):
 
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{| align="center" cellspacing="1" cellpadding="1" border="1" width="200"
 
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|-
 
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| [[Image:GPIO value0 readwrite test.JPG|center|350x230px]]
 
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|
 
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[[Image:GPIO value1 readwrite test.JPG|center|350x230px]]
 
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|}
 
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<br> The code above shows that driver works properly, GPIO_136 is configured like input and GPIO_137 is configured like output with value 0, when read GPIO_136 the result is 0. To make sure that works well, configure GPIO_137 with value 1, now GPIO_136 reads 1. <br> This driver have more options like IRQ, but is not explained here.
 
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[[Category:USB]] [[Category:How_to_forge]] [[Category:GPIO]] [[Category:UART]] [[Category:IGEP_Technology_Devices_Guides]]
 

Revision as of 18:11, 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 in IGEP v2, but this one is very simple.

Feedback and Contributing

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

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