[U-Boot-Users] Flash not-readable??

[erik.teose at exgate.tek.com]

Hi Wolfgang,

Thanks for getting back to me.

> > Now for my problem. U-boot appears to boot properly, given the output
that
> > shows up on the serial console (see above). But then the console appears
to go
> > dead; no response to carriage returns on the keyboard. 

> What exactly is "then"? Do you mean you see a U-Boot prompt ("=>  "),
> but  you  cannot  input  any commands? Maybe this is simply a problem
> with your serial cable / port configuration?

This is what is displayed when the board powers up (no bdi connected):

U-Boot 0.2.0 (Mar 24 2003 - 14:26:30)

IBM PowerPC 440 Rev. C
Board: IBM 440GP Evaluation Board (Ebony)
        VCO: 800 MHz
        CPU: 400 MHz
        PLB: 133 MHz
        OPB: 66 MHz
        EPB: 66 MHz
I2C:   ready
DRAM:  I2c read: failed 4
I2c read: failed 4
128 MB
FLASH:  4.5 MB
*** Warning - bad CRC, using default environment

PCI:   Bus Dev VenId DevId Class Int
In:    serial
Out:   serial
Err:   serial
KGDB:  kgdb ready
ready
BEDBUG:ready
=>

After this is displayed, u-boot does not respond to CR (or any
other characters) on the keyboard. The serial cable / port config
works fine with other systems (e.g. the IBM bootrom that I replaced
with u-boot). Do you know if u-boot uses hardware flow control?
I don't think that's a problem, but you never know. I'm using C-Kermit,
with these comm parms:

(/home/erikt/) C-Kermit>show comm

Communications Parameters:
 Line: /dev/ttyS0, speed: 9600, mode: local, modem: none
 Parity: none, stop-bits: (default) (8N1)
 Duplex: full, flow: rts/cts, handshake: none
 Carrier-watch: off, close-on-disconnect: off
 Lockfile: /var/lock/LCK..ttyS0
 Terminal bytesize: 7, escape character: 28 (^\)

 Carrier Detect      (CD):  Off
 Dataset Ready       (DSR): Off
 Clear To Send       (CTS): Off
 Ring Indicator      (RI):  Off
 Data Terminal Ready (DTR): On
 Request To Send     (RTS): On


Latest News: I just turned off flow control in Kermit, and it works!!
Thanks for making me look at all the options.

Erik