olimex a10 > i2c

[bellad]

hello,

i want use ds2482-100 i2c-> 1wire maxim , but i not see with i2cdetect -y 0

in script.bin :

[twi_para]
twi_port = 0
twi_scl = port:PB00<2><default><default><default>
twi_sda = port:PB01<2><default><default><default>

--

[twi0_para]
twi0_used = 1
twi0_scl = port:PB00<2><default><default><default>
twi0_sda = port:PB01<2><default><default><default>

[twi1_para]
twi1_used = 0
twi1_scl = port:PB18<2><default><default><default>
twi1_sda = port:PB19<2><default><default><default>

[twi2_para]
twi2_used = 0
twi2_scl = port:PB20<2><default><default><default>
twi2_sda = port:PB21<2><default><default><default>

i have plug PB00 and PB01

Linux lime-a10 4.1.6-sunxi #22 SMP Tue Aug 25 17:54:51 CEST 2015 armv7l GNU/Linux

modprobe ?? what ??

thank you for your help

[Igor]

script.bin is configuration for kernel 3.4 if present.

 

you will need to mess with DTB: sun4i-a10-olinuxino-lime.dtb

[bellad]

thank

can you say more

the file script.bin is different from sun4i-a10-olinuxino-lime.dtb ?

i not understand

[Igor]

script.bin (script.fex) is Allwinner way of structure for describing hardware, DTB (DTS for source) is for (probably) all others.

 

You need to convert 

sun4i-a10-olinuxino-lime.dtb 

to source, edit 

sun4i-a10-olinuxino-lime.dts

and back.

 

http://events.linuxfoundation.org/sites/events/files/slides/petazzoni-device-tree-dummies.pdf

http://elinux.org/Device_Tree

[bellad]

in sun4i-a10-olinuxino-lime.dts

i2c0@0 {
                allwinner,pins = "PB0", "PB1";
                allwinner,function = "i2c0";
                allwinner,drive = <0x0>;
                allwinner,pull = <0x0>;
                linux,phandle = <0x2a>;
                phandle = <0x2a>;
            };

i2c@01c2ac00 {
            compatible = "allwinner,sun4i-a10-i2c";
            reg = <0x1c2ac00 0x400>;
            interrupts = <0x7>;
            clocks = <0x28 0x0>;
            status = "okay";
            #address-cells = <0x1>;
            #size-cells = <0x0>;
            pinctrl-names = "default";
            pinctrl-0 = <0x2a>;

it's ok ??

setenv bootargs console=tty1 root=/dev/sda1 rootwait rootfstype=ext4 sunxi_ve_mem_reserve=0 sunxi_g2d_mem_reserve=0 sunxi_no_mali_mem_reserve sunxi_fb_mem_reserve=16 hdmi.audio=EDID:0 disp.screen0_output_mode=1920x1080p60 panic=10 consoleblank=0 enforcing=0 loglevel=1
#--------------------------------------------------------------------------------------------------------------------------------
# Boot loader script to boot with different boot methods for old and new kernel
#--------------------------------------------------------------------------------------------------------------------------------
if ext4load mmc 0 0x00000000 /boot/.next || fatload mmc 0 0x00000000 .next
then
# sunxi mainline kernel
#--------------------------------------------------------------------------------------------------------------------------------
ext4load mmc 0 0x49000000 /boot/dtb/${fdtfile} || fatload mmc 0 0x49000000 /dtb/${fdtfile}
ext4load mmc 0 0x46000000 /boot/zImage || fatload mmc 0 0x46000000 zImage
env set fdt_high ffffffff
bootz 0x46000000 - 0x49000000
#--------------------------------------------------------------------------------------------------------------------------------
else
# sunxi android kernel
#--------------------------------------------------------------------------------------------------------------------------------
ext4load mmc 0 0x43000000 /boot/script.bin || fatload mmc 0 0x43000000 script.bin
ext4load mmc 0 0x48000000 /boot/zImage || fatload mmc 0 0x48000000 zImage
bootz 0x48000000
#--------------------------------------------------------------------------------------------------------------------------------
fi
# Recompile with:
# mkimage -C none -A arm -T script -d /boot/boot.cmd /boot/boot.scr

i must modify the boot.scr ?

[bellad]

oh , sorry , it's my fault , bad plug my i2c ic ds2482-100

but , thank you so much for " script.bin (script.fex) is Allwinner way of structure for describing hardware, DTB (DTS for source) is for (probably) all others. " and the link's

I learned a lot