We are currently working on a project related to IP telephony.For that we need to load uClinux Image file to BF537 STAMP board. We hope to benefit from your guidance.

The main error we are encountering is that, U-boot prompt from BF537 STAMP is not showing up on minicom/kermit or any other terminal program.

Here is the procedure we are following.

We are using BF537 STAMP board and OS Ubuntu 9.04 Jaunty Version.

We have installed USB to serial converter drivers in ubuntu and then tried to load u-boot by typing

bfin-uclinux-ldr -l u-boot.ldr /dev/ttyUSB0

CLI output is

bfin-uclinux-ldr -l u-boot.ldr /dev/ttyUSB0 Loading LDR u-boot.ldr ... OK! Opening /dev/ttyUSB0 ... OK! Configuring terminal I/O ... OK!

Trying to send autobaud ... OK!

Trying to read autobaud ... OK!

Checking autobaud ... OK!

Autobaud result: 115200bps 49.766mhz (header:0xBF DLL:0x1B DLH:0x00 fin:0x00)

Sending blocks of DXE 1 ... [1/2] [2/2] OK!

Sending blocks of DXE 2 ... [1/5] [2/5] [3/5] [4/5] [5/5] OK!

You may want to run minicom or kermit now

We tried it with both minicom and kermit. With keystrokes, the screen showed a few bytes return on minicom and kermit showed this result on CLI

bfin>connect Connecting to /dev/ttyUSB0, speed 57600 Escape character: Ctrl-\ (ASCII 28, FS): enabled Type the escape character followed by C to get back, or followed by ? to see other options.

after exit it showed

back to ossie@desktop

bfin

Now here if we type version or any uboot command here it should work, but on our pc it is actually the kermit interface not u boot and version command shows the Kermit-C version.

The initial settings for kermit and minicom are given below: In minicom the following parameters were set

57600 baud

8 data bits

Parity none

1 stop bit

H/W flow control off

and then we set the modem and dailing options.

Then we powered up the STAMP board but still the u-boot CLI did not show up,Only a few bytes showed up upon keystrokes after resetting the board.

Kermit settings are as under:

set line /dev/ttyS0

define sz !sz %0 > /dev/ttyS0 < /dev/ttyS0

set speed 57600

set carrier-watch off

set prefixing all

set parity none

set stop-bits 1

set modem none

set file type bin

set file name lit

set flow-control none

set prompt "bfin> "

We have set the board to following settings i.e.

SW16: Set the boot mode switch to position 7

JP9: Removed the UART loop back jumper

SW4: Set UART switch to {OFF,ON,OFF,ON}

SW6: Set flash switch to {ON,ON,ON,ON}

We have also tried to load u-boot.ldr using ldrviewer in Windows XP and then accesing it in kermit or minicom in Ubuntu and hyperterminal on Windows XP but no u-boot prompt was seen in any terminal program.

Dear all, please guide us, where are we going wrong or suggest some other authenticated procedure to get the u-boot prompt up and running