Hi all,

I’m working DM6446 board with uboot but it can’t erase NOR flash.

This is my platform.

DM6446( Davinci), NOR flash (P30, PF48F4000P0ZBQ0, I think it is same device to 28F256P30 series).

Flash 32MB, DDR2 256MB.

Used Configuration file is davinci_dvevm.h.

Blow was modified by me.

//==================

#define CONFIG_SYS_FLASH_SECT_SZ 0x20000 /* 128kb intel Flash */

//recent uboot version has binary size about 180k bytes. Thus it needs 0x40000.

#define CONFIG_ENV_OFFSET (CONFIG_SYS_FLASH_SECT_SZ*2)

//Strata has 259 sectors , not 256 sector.!!!!

#define CONFIG_SYS_MAX_FLASH_SECT (PHYS_FLASH_SIZE/CONFIG_SYS_FLASH_SECT_SZ+256)

//==========

Below has captured by my RS-232 monitor and my working screen.

But bootargs didn’t erase. By erase command , it can’t also erase NOR flash .

What is my mistake?

//================captured log

U-Boot 2009.11 (Mar 06 2010 - 16:03:15)

Cores: ARM 297 MHz, DSP 594 MHz

DDR: 162 MHz

I2C: ready

DRAM: 256 MB

Flash: 32 MB

*** Warning - bad CRC, using default environment

In: serial

Out: serial

Err: serial

Read from EEPROM @ 0x50 failed

Net: Ethernet PHY: LXT972 @ 0x01

U-Boot > printenv

bootargs=mem=120M console=ttyS0,115200n8 root=/dev/hda1 rw noinitrd ip=dhcp

bootcmd=setenv setboot setenv bootargs $(bootargs) video=dm64xxfb:output=$(videostd);run setboot; bootm 0x2050000

baudrate=115200

bootfile="uImage"

stdin=serial

stdout=serial

stderr=serial

videostd=ntsc

ver=U-Boot 2009.11 (Mar 06 2010 - 16:03:15)

Environment size: 325/131068 bytes

U-Boot > setenv bootargs

U-Boot > saveenv

Saving Environment to Flash...

Un-Protected 1 sectors

Erasing Flash...

.. done

Erased 1 sectors

Writing to Flash... done

Protected 1 sectors

U-Boot >

ç================reset by electrically….=================

U-Boot 2009.11 (Mar 06 2010 - 16:03:15)

Cores: ARM 297 MHz, DSP 594 MHz

DDR: 162 MHz

I2C: ready

DRAM: 256 MB

Flash: 32 MB

*** Warning - bad CRC, using default environment

In: serial

Out: serial

Err: serial

Read from EEPROM @ 0x50 failed

Net: Ethernet PHY: LXT972 @ 0x01

U-Boot > printenv

bootargs=mem=120M console=ttyS0,115200n8 root=/dev/hda1 rw noinitrd ip=dhcp

bootcmd=setenv setboot setenv bootargs $(bootargs) video=dm64xxfb:output=$(videostd);run setboot; bootm 0x2050000

baudrate=115200

bootfile="uImage"

stdin=serial

stdout=serial

stderr=serial

videostd=ntsc

ver=U-Boot 2009.11 (Mar 06 2010 - 16:03:15)

Environment size: 325/131068 bytes

U-Boot >