Just FYI. It is not the hardware problem. I update the u-boot to latest version and port all the configuration files. It just works. Must be something improved (or fixed) in the new u-boot version. So I learned the lesson, always use latest stable u-boot version. :-)
Thanks for the help.
Raymond
On Mon, Dec 13, 2010 at 6:11 PM, Wolfgang Denk wd@denx.de wrote:
Dear raymond zhao,
In message AANLkTik9PHqAAvvE1fpGVMh5EYVBb=LitaxA2dG7Y_SA@mail.gmail.com you wrote:
I have a AMCC PowerPC 405EX based board. The u-boot version is U-Boot 1.3.2-RELEASE_11. It works fine until we have to change the NOR-Flash
chip
There has never been any such release. There was v1.3.2, followed by v1.3.3. Note that these are more than 2.5 years old, so I strongly recommend to update to current code instead.
static int init_func_i2c (void) { puts ("I2C: "); i2c_init (CFG_I2C_SPEED, CFG_I2C_SLAVE); puts ("ready\n"); return (0); } In debug console: I actually see the out put I2C: . The codes fly away inside i2c_init (CFG_I2C_SPEED, CFG_I2C_SLAVE); and never come back to put("ready\n");
This does not really look like a flash related issue to me.
Another interesting thing is when I am in function init_func_i2c, I used
bt
full in GDB to check the stack. I get the following: (gdb) bt full #0 <signal handler called> No locals. #1 0x00000000 in ?? () No symbol table info available. #2 0x00000000 in ?? () No symbol table info available. Previous frame inner to this frame (corrupt stack?)
Neither does this.
Does this mean the stack is corrupted? There should have a stack already
in
this moment, right?
Does anyone has any idea which direction I should go?
Check your voltages, as close to the flash chips as possible. The new ones may draw higher currents (especially higher and steeper peaks). If your voltages are not clean you may see data corruption, which would explain the effects you describe (and a lot more).
Best regards,
Wolfgang Denk
-- DENX Software Engineering GmbH, MD: Wolfgang Denk & Detlev Zundel HRB 165235 Munich, Office: Kirchenstr.5, D-82194 Groebenzell, Germany Phone: (+49)-8142-66989-10 Fax: (+49)-8142-66989-80 Email: wd@denx.de On the subject of C program indentation: "In My Egotistical Opinion, most people's C programs should be indented six feet downward and covered with dirt." - Blair P. Houghton