Prpplague: DHT-Walnut /Inter Wiki moved to DHT-Walnut PPCBoot: naming scheme

2008-12-04T22:39:47Z

DHT-Walnut /Inter Wiki moved to DHT-Walnut PPCBoot: naming scheme

Prpplague at 21:05, 24 September 2007

2007-09-24T21:05:35Z

Chris at 10:39, 14 July 2007

2007-07-14T10:39:16Z

RBot: Bot (Edward's framework)

2007-03-07T03:31:13Z

Bot (Edward's framework)

New page

Quick notes on updating from stock ppcboot v1.1.2 to [[GPSFan]]'s ppcboot v1.1.6

* Boot the board and bring it to the ppcboot console prompt.
* Check current flash configuration:

=> ''flinfo''

<pre>Bank # 1: AMD AM29F040 (512 Kbit, uniform sector size)
Size: 512 KB in 8 Sectors
Sector Start Addresses:
FFF80000 RO FFF90000 RO FFFA0000 RO FFFB0000 FFFC0000
FFFD0000 FFFE0000 FFFF0000 </pre>

Note that the bottom three sectors, containing the existing 1.1.2 bootloader, are protected.
We also want to protect the last sector, which contains the initial jump instruction, so:

=> ''protect on ffff0000 ffffffff''

<pre>Protected 1 sectors
</pre>

* Now download the new bootloader into ram:

=> ''loadb 400000 115200''

<pre>## Switch baudrate to 115200 bps and press ENTER ...
## Ready for binary (kermit) download ...
## Start Addr = 0x00400000
## Switch baudrate to 9600 bps and press ESC ...
</pre>

* Erase the three spare sectors, which we'll use to backup the 1.1.2 bootloader:

=> ''erase fffc0000 fffeffff''

<pre>Erase Flash from 0xfffc0000 to 0xfffeffff
Erasing sector fffc0000
.Erasing sector fffd0000
.Erasing sector fffe0000
. done
Erased 3 sectors</pre>

* (Optional: erase the 0xfffb0000 sector, which will be used for non-volatile environment storage.)

=> ''erase fffb0000 fffbffff''

<pre>Erase Flash from 0xfffb0000 to 0xfffbffff
Erasing sector fffb0000
. done
Erased 1 sectors</pre>

* Check that sectors 0xfffc0000 to 0xfffe0000 are erased, and sector 0xffff0000 is protected:

=> ''flinfo''

<pre>Bank # 1: AMD AM29F040 (512 Kbit, uniform sector size)
Size: 512 KB in 8 Sectors
Sector Start Addresses:
FFF80000 RO FFF90000 RO FFFA0000 RO FFFB0000 E FFFC0000 E
FFFD0000 E FFFE0000 E FFFF0000 RO </pre>

* Now we're ready to backup the 1.1.2 bootloader. Copy three sectors from 0xfff80000 to 0xfffc0000:

=> ''cp.b fff80000 fffc0000 30000''

<pre>Copy to Flash... done
</pre>

* Easy enough, right? Compare just to be sure it went ok:

=> ''cmp.b fff80000 fffc0000 30000''

<pre>Total of 196608 bytes were the same
</pre>

* Now we're ready to modify the bootsectors. We'll turn off protection, erase the three bottom sectors, and copy the new 1.1.6 bootloader from ram.

* Unprotect the bottom three sectors:
=> ''protect off fff80000 fffaffff''

<pre>Un-Protected 3 sectors
</pre>

'''From this point on, do *not* power down the board. This is the critical section.'''
* Erase the bottom three sectors with the original 1.1.2 bootloader:

=> ''erase fff80000 fffaffff''

<pre>Erase Flash from 0xfff80000 to 0xfffaffff
Erasing sector fff80000
.Erasing sector fff90000
.Erasing sector fffa0000
. done
Erased 3 sectors</pre>

* Copy the new bootloader into flash:
=> ''cp.b 400000 fff80000 30000''

<pre>Copy to Flash... done
</pre>

* Verify the copy:
=> ''cmp.b 400000 fff80000 30000''

<pre>Total of 196608 bytes were the same
</pre>

'''End of critical section. Congratulations''''

* We've finished modifying flash, so turn the write protection back on:
=> ''protect on fff80000 fffaffff''

<pre>Protected 3 sectors
</pre>

To sum up, you'll end up executing 10 commands:

=> ''protect on ffff0000 ffffffff''

=> ''loadb 400000 115200''

=> ''erase fffc0000 fffeffff''

=> ''cp.b fff80000 fffc0000 30000''

=> ''cmp.b fff80000 fffc0000 30000''

=> ''protect off fff80000 fffaffff''

=> ''erase fff80000 fffaffff''

=> ''cp.b 400000 fff80000 30000''

=> ''cmp.b 400000 fff80000 30000''

=> ''protect on fff80000 fffaffff''

← Older revision		Revision as of 21:05, 24 September 2007
Line 1:		Line 1:
−	Quick notes on updating from stock ppcboot v1.1.2 to [[GPSFan]]'s ppcboot v1.1.6	+	Quick notes on updating from stock ppcboot v1.1.2 to GPSFan's ppcboot v1.1.6

	* Boot the board and bring it to the ppcboot console prompt.		* Boot the board and bring it to the ppcboot console prompt.

← Older revision		Revision as of 10:39, 14 July 2007
Line 137:		Line 137:

	=> ''protect on fff80000 fffaffff''		=> ''protect on fff80000 fffaffff''
		+
		+	[[Category:DHT-Walnut]]

DHT-Walnut PPCBoot - Revision history

Prpplague: DHT-Walnut /Inter Wiki moved to DHT-Walnut PPCBoot: naming scheme

Prpplague at 21:05, 24 September 2007

Chris at 10:39, 14 July 2007

RBot: Bot (Edward's framework)