Sorry, I do not quite understand your question, but I'll try to answer.

I forgot when recording chip, specify a log file entry. Because I have a log file cleanup, and reading to compare the recorded information.

To clean the chip pin WP, I connect to the GND. For writing and reading from the chip, pin WP connects to the VCC.

Here is the log when cleaning:

======================

flashrom v0.9.6.1-r1704 on Windows 6.1 (x86)

flashrom was built with GCC 4.7.2, little endian

Command line (7 args): flashrom.exe -p buspirate_spi:dev=COM12 -VE -c AT25DF161 -o write_e.txt

Calibrating delay loop... OS timer resolution is 1000 usecs, 2185M loops per second, 10 myus = 0 us, 100 myus = 0 us, 1000 myus = 1000 us, 10000 myus = 10001 us, 4000 myus = 4000 us, OK.

Initializing buspirate_spi programmer

Baud rate is 115200.

Detected Bus Pirate hardware v4

Detected Bus Pirate firmware 6.2 ("v6.2-beta1")

Using SPI command set v2.

SPI speed is 8MHz

Raw bitbang mode version 1

Raw SPI mode version 1

The following protocols are supported: SPI.

Probing for Atmel AT25DF161, 2048 kB: probe_spi_rdid_generic: id1 0x1f, id2 0x4602

Found Atmel flash chip "AT25DF161" (2048 kB, SPI) on buspirate_spi.

Ignoring security lockdown (if present)

Ignoring status register byte 2

Chip status register is 0x0c.

Chip status register: Sector Protection Register Lock (SRPL) is not set

Chip status register: Bit 6 is not set

Chip status register: Erase/Program Error (EPE) is not set

Chip status register: WP# pin (WPP) is asserted

Chip status register: Software Protection Status (SWP): all sectors are protected

Chip status register: Write Enable Latch (WEL) is not set

Chip status register: Write In Progress (WIP/BUSY) is not set

===

This flash part has status UNTESTED for operations: READ ERASE WRITE

The test status of this chip may have been updated in the latest development

version of flashrom. If you are running the latest development version,

please email a report to flashrom@flashrom.org if any of the above operations

work correctly for you with this flash part. Please include the flashrom

output with the additional -V option for all operations you tested (-V, -Vr,

-VE, -Vw), and mention which mainboard or programmer you tested.

Please mention your board in the subject line. Thanks for your help!

Ignoring security lockdown (if present)

Some block protection in effect, disabling... disabled.

Erase/write done.

Raw bitbang mode version 1

Bus Pirate shutdown completed.

Here is the log when reading for comparison:

================================

flashrom v0.9.6.1-r1704 on Windows 6.1 (x86)

flashrom was built with GCC 4.7.2, little endian

Command line (8 args): flashrom.exe -p buspirate_spi:dev=COM12 -Vr read_CAM-4020.bin -c AT25DF161 -o read_vr.txt

Calibrating delay loop... OS timer resolution is 1000 usecs, 2158M loops per second, 10 myus = 0 us, 100 myus = 0 us, 1000 myus = 1000 us, 10000 myus = 11001 us, 4000 myus = 4000 us, OK.

Initializing buspirate_spi programmer

Baud rate is 115200.

Detected Bus Pirate hardware v4

Detected Bus Pirate firmware 6.2 ("v6.2-beta1")

Using SPI command set v2.

SPI speed is 8MHz

Raw bitbang mode version 1

Raw SPI mode version 1

The following protocols are supported: SPI.

Probing for Atmel AT25DF161, 2048 kB: probe_spi_rdid_generic: id1 0x1f, id2 0x4602

Found Atmel flash chip "AT25DF161" (2048 kB, SPI) on buspirate_spi.

Ignoring security lockdown (if present)

Ignoring status register byte 2

Chip status register is 0x1c.

Chip status register: Sector Protection Register Lock (SRPL) is not set

Chip status register: Bit 6 is not set

Chip status register: Erase/Program Error (EPE) is not set

Chip status register: WP# pin (WPP) is not asserted