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Altera_Forum's avatar
Altera_Forum
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20 years ago

i2c bus not work i think ?

I have add the I2C opencores component in SOPC builder, add the logic in quartus and assigned the pins.

copiled the kernell en filesystem.

i have started the i2cset

I get this on my console. 

uClinux/Nios II
Altera Nios II support (C) 2004 Microtronix Datacom Ltd.
Built 1 zonelists
Kernel command line: root=/dev/mtdblock0 ro
PID hash table entries: 128 (order: 7, 2048 bytes)
Dentry cache hash table entries: 4096 (order: 2, 16384 bytes)
Inode-cache hash table entries: 2048 (order: 1, 8192 bytes)
Memory available: 14416k/16384k RAM, 0k/0k ROM (1447k kernel code, 327k data)
Mount-cache hash table entries: 512 (order: 0, 4096 bytes)
NET: Registered protocol family 16
NIOS serial driver version 0.0
ttyS0 (irq = 4) is a builtin NIOS UART
Serial: JTAG UART driver $Revision: 1.3 $
ttyJ0 at MMIO 0x821208b0 (irq = 1) is a jtag_uart
RAMDISK driver initialized: 16 RAM disks of 4096K size 1024 blocksize
smc_probe: 150000 Khz Nios
SMSC LAN91C111 Driver (v2.1), (Linux Kernel 2.6)
eth0: SMC91C11xFD(rev:1) at 0x82110300 IRQ:6 MEMSIZE:8192b NOWAIT:0 ADDR: 00:07:
ed:0d:b1:df
smc_probe: 150000 Khz Nios
Using anticipatory io scheduler
Altera NDK flash (AMD): Found 1 x16 devices at 0x0 in 8-bit bank
 Amd/Fujitsu Extended Query Table at 0x0040
Altera NDK flash (AMD): CFI does not contain boot bank location. Assuming top.
number of CFI chips: 1
cfi_cmdset_0002: Disabling erase-suspend-program due to code brokenness.
cmdlinepart partition parsing not available
RedBoot partition parsing not available
Using Altera NDK partition definition
Creating 4 MTD partitions on "Altera NDK flash (AMD)":
0x00200000-0x00600000 : "romfs/jffs2"
0x00000000-0x00200000 : "loader/kernel"
0x00600000-0x00700000 : "User configuration"
0x00700000-0x00800000 : "safe configuration"
NET: Registered protocol family 2
IP: routing cache hash table of 512 buckets, 4Kbytes
TCP: Hash tables configured (established 1024 bind 2048)
NET: Registered protocol family 1
NET: Registered protocol family 17
VFS: Mounted root (romfs filesystem) readonly.
Freeing unused kernel memory: 48k freed (0x119e000 - 0x11a9000)
expand: from=/ramfs.img to=/dev/ram0
expand: from=/ramfs.img to=/dev/ram1
eth0:PHY 100BaseT
eth0:PHY Full Duplex
/etc/issue              www.microtronix.com               July 2004
                   Welcome to Linux on the Nios II
Nios2 login: nios
Password:
#  cd
#  cd bin#  i2cset
Syntax: i2cset I2CBUS CHIP-ADDRESS DATA-ADDRESS VALUE 
  MODE is 'b' or 'w' (default b)
  I2CBUS is an integer
Error: No I2C busses found!
Be sure you have done 'modprobe i2c-dev'
and also modprobed your i2c bus drivers#

Has someone any suggestions what i can do ??

9 Replies

  • Altera_Forum's avatar
    Altera_Forum
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    20 years ago

    can you run i2cdetect and see what it finds? 

    # i2cdetect
Error: No i2c-bus specified!
Syntax: i2cdetect   I2CBUS 
  I2CBUS is an integer
  With -f, scans all addresses (NOT RECOMMENDED)
  With -q, uses only quick write commands for probing (NOT RECOMMENDED)
  With -r, uses only read byte commands for probing (NOT RECOMMENDED)
  If provided, FIRST and LAST limit the probing range.
  i2cdetect -l lists installed busses only
  Installed I2C busses:
    i2c-0       unknown         Opencores i2c 0    Algorithm unavailable
    i2c-1       unknown         Opencores i2c 1    Algorithm unavailable
  • Altera_Forum's avatar
    Altera_Forum
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    20 years ago

    I get this 

    # i2cdetect
Error: No i2c-bus specified!
Syntax: i2cdetect   I2CBUS 
  I2CBUS is an integer
  With -f, scans all addresses (NOT RECOMMENDED)
  With -q, uses only quick write commands for probing (NOT RECOMMENDED)
  With -r, uses only read byte commands for probing (NOT RECOMMENDED)
  If provided, FIRST and LAST limit the probing range.
  i2cdetect -l lists installed busses only
Error: No I2C busses found!
Be sure you have done 'modprobe i2c-dev'
and also modprobed your i2c bus drivers#
  • Altera_Forum's avatar
    Altera_Forum
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    20 years ago

    Did you enable the i2c support in the kernel? If not,

    <div class='quotetop'>QUOTE </div>

    --- Quote Start ---

    Under the "Linux Kernel Configuration" interface, please goto submenu "Device Drivers" --> "I2C support", then enable the following items:

    I2C device interface

    I2C Algorithms ---> Opencores I2C interface

    I2C hardware Bus support ---> Opencores I2C Adapter[/b]

    --- Quote End ---

    <div class='quotetop'>QUOTE </div>

    --- Quote Start ---

    Make sure the following items are in the root filesystem:

    /dev/i2c/0: character device, major 89, minor 0

    /dev/i2c/1: character device, major 89, minor 1[/b]

    --- Quote End ---

  • Altera_Forum's avatar
    Altera_Forum
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    20 years ago

    I was forgot to enable the option: 

    I2C hardware Bus support ---> Opencores I2C Adapter

    when i build the kernell now ik get some error&#39;s

    the same in the topic " I2C Build errors, Where to define na_i2c_* variables " 

    6.x/drivers/i2c/busses/i2c-oc.c:165: error: (near initialization for `oc_hw_0.irq&#39;)
/cygdrive/c/altera/kits/nios2/bin/eclipse/plugins/com.microtronix.nios2linux.kernel_0.1.5/linux-2.6.x/drivers/i2c/busses/i2c-oc.c:170: error: `na_i2c_1&#39; undeclared here (not in a function)
/cygdrive/c/altera/kits/nios2/bin/eclipse/plugins/com.microtronix.nios2linux.kernel_0.1.5/linux-2.6.x/drivers/i2c/busses/i2c-oc.c:170: error: initializer element is not constant
/cygdrive/c/altera/kits/nios2/bin/eclipse/plugins/com.microtronix.nios2linux.kernel_0.1.5/linux-2.6.x/drivers/i2c/busses/i2c-oc.c:170: error: (near initialization for `oc_hw_1.base&#39;)
/cygdrive/c/altera/kits/nios2/bin/eclipse/plugins/com.microtronix.nios2linux.kernel_0.1.5/linux-2.6.x/drivers/i2c/busses/i2c-oc.c:171: error: `na_i2c_1_irq&#39; undeclared here (not in a function)
/cygdrive/c/altera/kits/nios2/bin/eclipse/plugins/com.microtronix.nios2linux.kernel_0.1.5/linux-2.6.x/drivers/i2c/busses/i2c-oc.c:171: error: initializer element is not constant
/cygdrive/c/altera/kits/nios2/bin/eclipse/plugins/com.microtronix.nios2linux.kernel_0.1.5/linux-2.6.x/drivers/i2c/busses/i2c-oc.c:171: error: (near initialization for `oc_hw_1.irq&#39;)
make: ***  Error 1
make: ***  Error 2
make: ***  Error 2
make: ***  Error 2
make: ***  Error 2
make: Leaving directory `/cygdrive/c/altera/kits/nios2/bin/eclipse/plugins/com.microtronix.nios2linux.kernel_0.1.5/linux-2.6.x&#39;

    your anser on that topic is

    <div class='quotetop'>QUOTE </div>

    --- Quote Start ---

    They are defined in SOPC builder, and exported to Linux through a dynamic generated header file called nios2_system.h[/b]

    --- Quote End ---

    That file is in the worspace directory of the kernell\build\inlcude

    Must i adjust the file ?

    What must i add or change?

    Could you help me whith this ?
  • Altera_Forum's avatar
    Altera_Forum
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    20 years ago

    I don&#39;t think you can change that file manually. It is checked (and updated if necessary) according to the system ptf file each time you build the kernel, so your manual changes will be removed.

    You need to instantiate the opencores i2c component in SOPC builder.
  • Altera_Forum's avatar
    Altera_Forum
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    20 years ago

    sorry, it is me who do not understand. The driver assumes there are 2 i2c controllers, (this is bad). Can you go to delete one from the source? It is in file drivers/i2c/busses/i2c-oc.c. Just remove all occurences of oc_xxxx_1 (oc_data_1, oc_ops_1, oc_hw_1, etc) and code accessing them.

  • Altera_Forum's avatar
    Altera_Forum
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    20 years ago

    I have got the kernell build whit no error&#39;s.

    This i think the solution is:

    When i add the component to the system in SOPC builder the name is "opencores_i2c_0"

    i rename it to "i2c_0" in the SOPC builder, the name in the nios2_system.h changes also. You must rerun SOPC an Quartus.

    Then i build the kernell en there where only error&#39;s on "i2c_1" and not on "i2c_0".

    I add a second i2c master to SOPC and also rename it to "i2c_1" then the kernell build;s wihout error&#39;s

    I don&#39;t have my kit with me so i will upload the kernell tomorrow and see if it is working.

    I it 22:00 hour at The Netherland now

    So it is just a name problem !!! I let you know if it is working tommorow
  • Altera_Forum's avatar
    Altera_Forum
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    20 years ago

    It is working !! 

    # i2cdetect
Error: No i2c-bus specified!
Syntax: i2cdetect   I2CBUS 
  I2CBUS is an integer
  With -f, scans all addresses (NOT RECOMMENDED)
  With -q, uses only quick write commands for probing (NOT RECOMMENDED)
  With -r, uses only read byte commands for probing (NOT RECOMMENDED)
  If provided, FIRST and LAST limit the probing range.
  i2cdetect -l lists installed busses only
  Installed I2C busses:
    i2c-1       unknown         Opencores i2c 1                         Algorith
m unavailable
    i2c-0       unknown         Opencores i2c 0                         Algorith
m unavailable

    I get also pulses on the pins that i assginged.

    wehen i run "i2cdetect -f 0" or i2cdetect -f 1"