Unbricking the Neo1973 (GTA01) without a debugboard - Revision history

Glenn: +cats

2009-07-26T08:09:43Z

+cats

2009-07-20T23:26:39Z

‎Fixing the uboot partitions/environment

2009-07-20T23:11:48Z

2009-07-20T23:07:43Z

‎Fixing the uboot environment

2009-07-15T23:36:42Z

2009-07-15T08:57:16Z

‎Fixing the uboot environment

2009-07-15T08:56:34Z

‎Fixing the uboot environment

2009-07-15T08:51:40Z

2009-07-15T07:41:48Z

2009-07-15T06:10:16Z

‎Flashing a new uboot

← Older revision		Revision as of 08:09, 26 July 2009
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	[[Image:Circle２.gif\|10px]] Thanks to Paul Fertser for helping me to unbrick my neo1973 :)		[[Image:Circle２.gif\|10px]] Thanks to Paul Fertser for helping me to unbrick my neo1973 :)
		+
		+	[[Category:Neo1973 Hardware]]
		+	[[Category:Debug Board]]

← Older revision		Revision as of 23:26, 20 July 2009
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−	===== Fixing the ~~uboot~~ partitions/environment =====	+	===== Fixing the NAND partitions/environment =====

	You can try and skip this step but most likely you will need to run the dynpart command below to partition the NAND so dfu-utils knows where to put uboot in it.		You can try and skip this step but most likely you will need to run the dynpart command below to partition the NAND so dfu-utils knows where to put uboot in it.

← Older revision		Revision as of 23:11, 20 July 2009
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	[[Image:Circle２.gif\|10px]] The battery is charged (this may/maynot work with the usb power connected)		[[Image:Circle２.gif\|10px]] The battery is charged (this may/maynot work with the usb power connected)
		+
		+	===== Loading uboot into memory over JTAG =====

	Now start openocd		Now start openocd

← Older revision		Revision as of 23:07, 20 July 2009
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−	===== Fixing the uboot environment =====	+	===== Fixing the uboot partitions/environment =====

	You can try and skip this step but most likely you will need to run the dynpart command below to partition the NAND so dfu-utils knows where to put uboot in it.		You can try and skip this step but most likely you will need to run the dynpart command below to partition the NAND so dfu-utils knows where to put uboot in it.

@@ Line 159: / Line 159: @@
 MMU: disabled, D-Cache: disabled, I-Cache: enabled
 </pre>
 '''NOTE''' This next step may take a while (around 250seconds), the openocd.cfg file on this page has had the speed slowed right down to reduce errors (jtag_speed 15). The speed of 15 seems to work even when the circuit is made on breadboard with wires everywhere :)
 <pre>
 > load_binary /tmp/uboot.bin 0x33f80000

@@ Line 190: / Line 190: @@
 <pre>
-GTA01Bv2 # dynpart
+GTA01Bv4 # dynpart
 mtdparts mtdparts=gta01-0:0x00030000(u-boot),0x00004000(u-boot env),0x00208000(kernel),0x00400000(initrd),0x039c4000(rootfs)
-GTA01Bv2 # dynenv set u-boot_env
+GTA01Bv4 # dynenv set u-boot_env
 4e 56 30 - 00 00 03 00
-TA01Bv2 # saveenv
+GTA01Bv4 # saveenv
 Saving Environment to NAND...
 Erasing Nand...Writing to Nand... done

@@ Line 183: / Line 183: @@
 ===== Fixing the uboot environment =====
-You can try and skip this step but most likely you will need to run the dynpart command below to partition the nand so dfu-utils knows where to put it
+You can try and skip this step but most likely you will need to run the dynpart command below to partition the NAND so dfu-utils knows where to put uboot in it.
 <pre>

← Older revision		Revision as of 08:51, 15 July 2009
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	The JTAG circuit required for unbricking a Neo1973 is relatively simple and requires 8 resistors, 1 IC, 1 transistor and 1 capacitor.		The JTAG circuit required for unbricking a Neo1973 is relatively simple and requires 8 resistors, 1 IC, 1 transistor and 1 capacitor.
		+
	It is a modified version of the Olimex ARM JTAG clone found [http://winarm.scienceprog.com/arm-development-tools/jtag-wiggler-clone-for-arm-microcontrollers.html Here]		It is a modified version of the Olimex ARM JTAG clone found [http://winarm.scienceprog.com/arm-development-tools/jtag-wiggler-clone-for-arm-microcontrollers.html Here]

@@ Line 11: / Line 11: @@
 ===== Soldering skills =====
-This method requires you to solder a circuit together and also solder wires onto the Neo1973 PCB pads. These are very small and require a steady hand and a decent quality soldering iron (ideally with an SMT tip).
+This method requires you to solder a circuit together and also solder wires onto the Neo1973 PCB pads. These are small so require a steady hand. Soldering them is easier with a SMT tip on your iron but any small tip should work fine.
 Care must be taken to not drip or flick solder onto the Neo1973 while working as this could put permanent marks on the LCD or short out components.
@@ Line 182: / Line 182: @@
 ===== Fixing the uboot environment =====
-Before a new uboot can be flashed the dynpart command must be run to partition the nand so dfu-utils knows where to put it
+You can try and skip this step but most likely you will need to run the dynpart command below to partition the nand so dfu-utils knows where to put it
 <pre>
@@ Line 210: / Line 210: @@
 Your Neo1973 is now unbricked :)
-The uboot flash will have reset the uboot environment to a very basic default with only one option to boot from NAND.
+The process will probably have reset the uboot environment to a very basic default with only one option to boot from NAND.
 Menu items to boot from SD will have to be re-added. See [http://wiki.openmoko.org/wiki/Booting_from_SD here]

← Older revision		Revision as of 06:10, 15 July 2009
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	The uboot flash will have reset the uboot environment to a very basic default with only one option to boot from NAND.		The uboot flash will have reset the uboot environment to a very basic default with only one option to boot from NAND.
		+
	Menu items to boot from SD will have to be re-added. See [http://wiki.openmoko.org/wiki/Booting_from_SD here]		Menu items to boot from SD will have to be re-added. See [http://wiki.openmoko.org/wiki/Booting_from_SD here]