[#5303] twi lcd fails to open lcd device on bf537 stamp

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[#5303] twi lcd fails to open lcd device on bf537 stamp

Submitted By: Mingquan Pan

Open Date

2009-07-01 05:01:20     Close Date

2009-07-02 23:34:14


Medium High     Assignee:

Michael Hennerich


Closed     Fixed In Release:


Found In Release:

N/A     Release:


N/A     Board:



BF537     Silicon Revision:

Is this bug repeatable?:

Yes     Resolution:


Uboot version or rev.:

    Toolchain version or rev.:


App binary format:


Summary: twi lcd fails to open lcd device on bf537 stamp



twi lcd fails to open lcd device on bf537 stamp.


## Booting kernel from Legacy Image at 02000000 ...

   Image Name:   Linux-

   Created:      2009-07-01   8:56:39 UTC

   Image Type:   Blackfin Linux Kernel Image (gzip compressed)

   Data Size:    4552987 Bytes =  4.3 MB

   Load Address: 00001000

   Entry Point:  00194594

   Verifying Checksum ... OK

   Uncompressing Kernel Image ... OK

Starting Kernel at = 00194594

Linux version (test@my-local-machine) (gcc version 4.1.2 (ADI svn)) #34 Wed Jul 1 16:56:28 CST 2009

console [early_BFuart0] enabled

early printk enabled on early_BFuart0

Warning: limiting memory to 56MB due to hardware anomaly 05000263

Board Memory: 64MB

Kernel Managed Memory: 64MB

Memory map:

  fixedcode = 0x00000400-0x00000490

  text      = 0x00001000-0x0010c7c0

  rodata    = 0x0010c7c0-0x00162f4c

  bss       = 0x00163000-0x001747ec

  data      = 0x001747ec-0x00186000

    stack   = 0x00184000-0x00186000

  init      = 0x00186000-0x00874000

  available = 0x00874000-0x037ff000

  DMA Zone  = 0x03f00000-0x04000000

Hardware Trace Active and Enabled

Boot Mode: 0

Reset caused by Software reset

Blackfin support (C) 2004-2009 Analog Devices, Inc.

Compiled for ADSP-BF537 Rev 0.2

Blackfin Linux support by http://blackfin.uclinux.org/

Processor Speed: 500 MHz core clock and 125 MHz System Clock

NOMPU: setting up cplb tables

Instruction Cache Enabled for CPU0

Data Cache Enabled for CPU0 (write-back)

Built 1 zonelists in Zone order, mobility grouping off.  Total pages: 14223

Kernel command line: root=/dev/mtdblock0 rw earlyprintk=serial,uart0,57600

Configuring Blackfin Priority Driven Interrupts

PID hash table entries: 256 (order: 8, 1024 bytes)

console handover: boot [early_BFuart0] -> real [ttyBF0]

Dentry cache hash table entries: 8192 (order: 3, 32768 bytes)

Inode-cache hash table entries: 4096 (order: 2, 16384 bytes)

Memory available: 48116k/65536k RAM, (7096k init code, 1069k kernel code, 487k data, 1024k dma, 7744k reserved)

Calibrating delay loop... 995.32 BogoMIPS (lpj=1990656)

Security Framework initialized

Mount-cache hash table entries: 512

Blackfin Scratchpad data SRAM: 4 KB

Blackfin L1 Data A SRAM: 16 KB (15 KB free)

Blackfin L1 Data B SRAM: 16 KB (16 KB free)

Blackfin L1 Instruction SRAM: 48 KB (37 KB free)

net_namespace: 288 bytes

NET: Registered protocol family 16

Blackfin DMA Controller

stamp_init(): registering device resources

NET: Registered protocol family 2

IP route cache hash table entries: 1024 (order: 0, 4096 bytes)

TCP established hash table entries: 2048 (order: 2, 16384 bytes)

TCP bind hash table entries: 2048 (order: 1, 8192 bytes)

TCP: Hash tables configured (established 2048 bind 2048)

TCP reno registered

NET: Registered protocol family 1

msgmni has been set to 93

io scheduler noop registered

io scheduler anticipatory registered (default)

io scheduler cfq registered

Serial: Blackfin serial driver

bfin-uart.1: ttyBF0 at MMIO 0xffc00400 (irq = 18) is a BFIN-UART

brd: module loaded

bfin_mii_bus: probed

bfin_mac: attached PHY driver [SMSC LAN83C185] (mii_bus:phy_addr=0:01, irq=-1, mdc_clk=2500000Hz(mdc_div=24)@sclk=125MHz)

bfin_mac bfin_mac.0: Blackfin on-chip Ethernet MAC driver, Version 1.1

bfin-spi bfin-spi.0: Blackfin on-chip SPI Controller Driver, Version 1.0, regs_base@ffc00500, dma channel@7

rtc-bfin rtc-bfin: rtc core: registered rtc-bfin as rtc0

i2c /dev entries driver

i2c-bfin-twi i2c-bfin-twi.0: Blackfin BF5xx on-chip I2C TWI Contoller, regs_base@ffc01400

AD5252 Attached

bfin-wdt: initialized: timeout=20 sec (nowayout=0)

TCP cubic registered

NET: Registered protocol family 17

rtc-bfin rtc-bfin: setting system clock to 1970-01-01 00:34:50 UTC (2090)

Freeing unused kernel memory: 7096k freed

dma_alloc_init: dma_page @ 0x00871000 - 256 pages at 0x03f00000


        a8888b.           / Welcome to the uClinux distribution \

       d888888b.         /       _     _                         \

       8P"YP"Y88        /       | |   |_|            __  __ (TM)  |

       8|o||o|88  _____/        | |    _ ____  _   _ \ \/ /       |

       8'    .88       \        | |   | |  _ \| | | | \  /        |

       8`._.' Y8.       \       | |__ | | | | | |_| | /  \        |

      d/      `8b.       \      \____||_|_| |_|\____|/_/\_\       |

     dP   .    Y8b.       \   For embedded processors including   |

    d8:'  "  `::88b        \    the Analog Devices Blackfin      /

   d8"         'Y88b        \___________________________________/

  :8P    '      :888

   8a.   :     _a88P         For further information, check out:

._/"Yaa_:   .| 88P|            - http://blackfin.uclinux.org/

\    YP"    `| 8P  `.          - http://docs.blackfin.uclinux.org/

/     \.___.d|    .'           - http://www.uclinux.org/

`--..__)8888P`._.'  jgs/a:f    - http://www.analog.com/blackfin


Have a lot of fun...



BusyBox v1.13.4 (2009-06-30 12:31:57 CST) built-in shell (msh)

Enter 'help' for a list of built-in commands.


root:/> modprobe bfin_twi_lcd

TWI LCD Driver v0.00

root:/> cd sys/bus/i2c/devices

root:/sys/bus/i2c/devices> ls

0-0027  0-002f

root:/sys/bus/i2c/devices> cd 0-002f/

root:/sys/devices/platform/i2c-bfin-twi.0/i2c-adapter/i2c-0/0-002f> ls

driver     name       read_w1    subsystem  write_w1

modalias   power      read_w3    uevent     write_w3

root:/sys/devices/platform/i2c-bfin-twi.0/i2c-adapter/i2c-0/0-002f> echo 4 > wri


root:/sys/devices/platform/i2c-bfin-twi.0/i2c-adapter/i2c-0/0-002f> cat  read_w1


root:/sys/devices/platform/i2c-bfin-twi.0/i2c-adapter/i2c-0/0-002f> twilcd_test


TWI LCD Test Application


Usage: twilcd_test [-h?v] [-c] [-d CONTROLLER] [-p POSITION] [Message String]

        -h?            this help

        -v             print version info

        -c             Clear Display

        -d Number      use 1,2,3 for CONTROLLER 1,2,BOTH

        -p Char POS    Position where to put the string


Example: twilcd_test -p 0 "Hello World !"

root:/sys/devices/platform/i2c-bfin-twi.0/i2c-adapter/i2c-0/0-002f> twilcd_test

-p 0 "Hello World! "

TWI LCD Test Application


Can't open dev lcd.                                                                                                                                       

root:/sys/devices/platform/i2c-bfin-twi.0/i2c-adapter/i2c-0/0-002f> ls /dev/

console             null                ram2                stdin

cpu_dma_latency     ptmx                ram3                stdout

fd                  pts                 ram4                tty

full                ram0                ram5                ttyBF0

i2c-0               ram1                ram6                uinput

kmsg                ram10               ram7                urandom

lcd                 ram11               ram8                watchdog

log                 ram12               ram9                zero

mem                 ram13               random

network_latency     ram14               rtc0

network_throughput  ram15               stderr




--- Michael Hennerich                                        2009-07-02 07:02:37

This bug was introduced in svn commit:

Revision 6418 rename TWI_LCD to BFIN_TWI_LCD


Fixed on branch 2009R1 and trunk




root:/> modprobe bfin_twi_lcd

TWI LCD Driver v0.00


root:/> twilcd_test -p 0 "Hallo"

TWI LCD Test Application


Position               : 0

Message                : Hallo



--- Mingquan Pan                                             2009-07-02 23:34:14













File Name     File Type     File Size     Posted By

config.twilcd    application/octet-stream    33494    Mingquan Pan