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doc:howto:generic.debrick [2013/02/09 01:18]
pierotofy
doc:howto:generic.debrick [2014/07/11 22:12] (current)
javitury
Line 31: Line 31:
Serial console allows you to interact with the CFE command line, watch the kernel boot and console access to linux. This is probably the only way you'll every get any meaningful feedback about the device boot up. Serial console allows you to interact with the CFE command line, watch the kernel boot and console access to linux. This is probably the only way you'll every get any meaningful feedback about the device boot up.
 +
 +== Serial modes ==
 +
 +Some [[doc/hardware/port.serial#serial.modes | serial modes]] allow you to upload a binary directly to ram or to the flash memory from the serial connection, allowing you to repair a broken bootloader
=== Arduino === === Arduino ===
Line 178: Line 182:
  * [[http://richard-burke.dyndns.org/wordpress/2009/02/programming-an-asus-p5b-bios|Programming an ASUS P5B BIOS | Adventures in Home Computing]]   * [[http://richard-burke.dyndns.org/wordpress/2009/02/programming-an-asus-p5b-bios|Programming an ASUS P5B BIOS | Adventures in Home Computing]]
 +
 +
 +===== Write flash chip by USB =====
 +
 +This is the probably easiest way to "burn" a flash chip: It is a cheap (cable ~20 EUR), universal (USB) and multiplatform (many OS) solution. Buy a FTDI cable C232HM-DDHSL-0 (in case of 3.3 Volts), connect the wires to the flash chip as shown below and write the data with [[http://flashrom.org/|flashrom]].
 +
 +<code>
 +C232HM-DDHSL-0      SPI-Flash SOP8
 +    1 red    ------ 8 Vcc
 +    2 orange ------ 6 SCLK
 +    3 yellow ------ 5 SI
 +    4 green  ------ 2 SO
 +    5 brown  ------ 1 /CS
 +    6 grey  ------ 3 /WP (with 4k7 Pullup)
 +    7 purple ------ 7 /HOLD (with 4k7 Pullup)
 +    10 black  ------ 4 Gnd
 +</code>
 +
 +Write command:
 +
 +<code>
 +# time ./flashrom -p ft2232_spi:type=232H -c MX25L6406E/MX25L6436E -w ../../dump.mtd 2>&1 |tee log
 +flashrom v0.9.7-r1711 on Darwin 8.11.0 (Power Macintosh)
 +flashrom is free software, get the source code at http://www.flashrom.org
 +
 +Calibrating delay loop... OK.
 +Found Macronix flash chip "MX25L6406E/MX25L6436E" (8192 kB, SPI) on ft2232_spi.
 +Reading old flash chip contents... done.
 +Erasing and writing flash chip... Erase/write done.
 +Verifying flash... VERIFIED.
 +
 +real    7m1.731s
 +user    0m12.288s
 +sys    0m22.984s
 +</code>
 +
 +The example shows burning of a MX25L6406 for the [[toh/alfa.network/ap121|Alfa AP121]]. (No, I didn't brick it. ;-) I just wanted to replace a 4MB Flash with 8 MB flash.)
 +
 +Warning: If you use a FTDI cable for [[doc/hardware/port.serial#prebuilt.cables|serial console]] then you probably must disable the FTDI serial port driver or exclude the product ID 0x6014 for the FT232H chip in the serial driver. Patch for MacOS:
 +
 +<code>
 +--- tmp/FTDIUSBSerialDriver.kext/Contents/Info.plist    2012-08-08 14:01:40.000000000 +0200
 ++++ /System/Library/Extensions/FTDIUSBSerialDriver.kext/Contents/Info.plist    2013-11-17 10:48:54.000000000 +0100
 +@@ -2014,25 +2014,6 @@
 +                        <key>idVendor</key>
 +                        <integer>1027</integer>
 +                </dict>
 +-              <key>FT232H</key>
 +-              <dict>
 +-                      <key>CFBundleIdentifier</key>
 +-                      <string>com.FTDI.driver.FTDIUSBSerialDriver</string>
 +-                      <key>IOClass</key>
 +-                      <string>FTDIUSBSerialDriver</string>
 +-                      <key>IOProviderClass</key>
 +-                      <string>IOUSBInterface</string>
 +-                      <key>bConfigurationValue</key>
 +-                      <integer>1</integer>
 +-                      <key>bInterfaceNumber</key>
 +-                      <integer>0</integer>
 +-                      <key>bcdDevice</key>
 +-                      <integer>2304</integer>
 +-                      <key>idProduct</key>
 +-                      <integer>24596</integer>
 +-                      <key>idVendor</key>
 +-                      <integer>1027</integer>
 +-              </dict>
 +                <key>FT4232H_A</key>
 +                <dict>
 +                        <key>CFBundleIdentifier</key>
 +</code>
 +
 +//(Note: To get flashrom work on an old MacOS 10.4 PPC system as shown above you'll have to make some mods to flashrom.)//
 +

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doc/howto/generic.debrick.1360369108.txt.bz2 · Last modified: 2013/02/09 01:18 by pierotofy