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Altera_Forum's avatar
Altera_Forum
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20 years ago

Logon using UART

Hi,

I am using the Altera Cyclone 1C20 board.

When I configure the kernel use th UART as console I get the following kernel print out but I do not get the logon prompt.

Linux echos characters and increments the Led display.

When I configure the kernel to use the JTAG port as a console I am able to logon fine.

Can anybody help?

Shlomo

Linux version 2.6.9-uc0 (skut@skut-xp2) (gcc version 3.4.1 (Altera Nios II 1.1

b137))# 5 Wed Mar 9 12:02:52 JST 2005

uClinux/Nios II

Altera Nios II support © 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: 14336k/16384k RAM, 0k/0k ROM (1548k kernel code, 309k data)

Mount-cache hash table entries: 512 (order: 0, 4096 bytes)

NET: Registered protocol family 16 request

NIOS serial driver version 0.0 1.2 MBving up.

ttyS0 (irq = 4) is a builtin NIOS UARToad Address: 00000000

RAMDISK driver initialized: 16 RAM disks of 4096K size 1024 blocksizeing Checksum ... Bad Data CRC

smc_probe: 50000 Khz Nios

12872

Using anticipatory io scheduler

Altera NDK flash (AMD): Found 1 x8 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 (0x11b2000 - 0x11bd000)

expand: from=/ramfs.img to=/dev/ram0

expand: from=/ramfs.img to=/dev/ram1

2 Replies

  • Altera_Forum's avatar
    Altera_Forum
    Icon for Honored Contributor rankHonored Contributor
    20 years ago

    This is briefly mentioned in the reference guide under "Using a Nios Serial UART instead of the JTAG UART"

    There are 2 parts to getting this to work: 1) changing the kernel console to the serial port (which you appear to have done successfully) and 2) change your inittab file to start a user console on the serial port

    To complete the second part of the process, do the following:

    a) In your filesystem project open the target/etc/inittab file

    b) remove the "# " from the line "# ttyS0:vt100:/bin/agetty 115200 ttyS0"

    c) save the inittab file

    d) rebuild your filesystem project

    e) upload your new romfs.bin to your board

    At this point both your kernel messages and your normal login should appear on the serial port.

    Dennis Scott

    Microtronix Datacom Ltd.