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Today's Topics:
1. r5661 - trunk/gta02-core/docs/ecn (wer...@docs.openmoko.org)
2. r5662 - trunk/gta02-core/docs/ecn (wer...@docs.openmoko.org)
3. r5663 - trunk/gta02-core/docs/ecn (wer...@docs.openmoko.org)
4. r5664 - trunk/gta02-core/modules (wer...@docs.openmoko.org)
--- Begin Message ---
Author: werner
Date: 2009-09-24 15:03:01 +0200 (Thu, 24 Sep 2009)
New Revision: 5661
Modified:
trunk/gta02-core/docs/ecn/ecn0002.txt
Log:
- removed "chips to remove" entry, because we have this covered now.
- added note that R2504 remains.
Modified: trunk/gta02-core/docs/ecn/ecn0002.txt
===================================================================
--- trunk/gta02-core/docs/ecn/ecn0002.txt 2009-09-22 00:55:48 UTC (rev
5660)
+++ trunk/gta02-core/docs/ecn/ecn0002.txt 2009-09-24 13:03:01 UTC (rev
5661)
@@ -5,6 +5,8 @@
Remove signals GCS0, GCS3, nNOR_WP, nFLASH_CE, nOE
+Note that the connection from IO_1V8 via R2504 to FLASH_1V8 (sheet 25xx
+f the Openmoko GTA02 schematics) remains for the NAND in the CPU.
+
To do:
-- chips to remove
- software impact of not having NOR on Qi and kernel
--- End Message ---
--- Begin Message ---
Author: werner
Date: 2009-09-24 15:10:23 +0200 (Thu, 24 Sep 2009)
New Revision: 5662
Modified:
trunk/gta02-core/docs/ecn/ecn0017.txt
Log:
- added description of why we should and why we can move BT
Modified: trunk/gta02-core/docs/ecn/ecn0017.txt
===================================================================
--- trunk/gta02-core/docs/ecn/ecn0017.txt 2009-09-24 13:03:01 UTC (rev
5661)
+++ trunk/gta02-core/docs/ecn/ecn0017.txt 2009-09-24 13:10:23 UTC (rev
5662)
@@ -1,7 +1,17 @@
Move Bluetooth module (U2) to main PCB
-To do:
-- explain FPC issues
-- good old times of GTA01Bv2:
- http://people.openmoko.org/werner/retro/gta01-bt.jpg
+In all GTA01 devices since GTA01Bv3 and all GTA02 devices, the Bluetooth
+module resided on an FPC mounted on the main shield. This complicates
+assembly and introduces production risk. Furthermore, the Bluetooth FPCs
+had at least at some point in time a low yield, further complicating
+production.
+
+With the removal of the second acceleration sensor and the ability to
+relocate (remove ?) the backup battery, we now have room for placing the
+Bluetooth circuit on the main PCB, like it was done in GTA01Bv2.
+
+http://people.openmoko.org/werner/retro/gta01-bt.jpg
+
+
+Author: Werner Almesberger <wer...@openmoko.org>
--- End Message ---
--- Begin Message ---
Author: werner
Date: 2009-09-24 15:40:23 +0200 (Thu, 24 Sep 2009)
New Revision: 5663
Added:
trunk/gta02-core/docs/ecn/ecn0040.txt
Modified:
trunk/gta02-core/docs/ecn/STATUS
Log:
- added ECN0040 (for discussion) "Remove backup battery (BAT1701)"
Modified: trunk/gta02-core/docs/ecn/STATUS
===================================================================
--- trunk/gta02-core/docs/ecn/STATUS 2009-09-24 13:10:23 UTC (rev 5662)
+++ trunk/gta02-core/docs/ecn/STATUS 2009-09-24 13:40:23 UTC (rev 5663)
@@ -39,7 +39,9 @@
0037 Execute Route ROUT1/LOUT1 back to LINE1/LINE2 input
0038 Discuss Loudspeaker EMI filter
0039 Discuss Insert 0R resistors into SPI signals
+0040 Discuss Remove backup battery (BAT1701)
+
Open ECNs
---------
@@ -63,3 +65,4 @@
0037 AUDIO
0038 AUDIO
0039 CPU, LCM
+0040 PMU, MODEM
Added: trunk/gta02-core/docs/ecn/ecn0040.txt
===================================================================
--- trunk/gta02-core/docs/ecn/ecn0040.txt (rev 0)
+++ trunk/gta02-core/docs/ecn/ecn0040.txt 2009-09-24 13:40:23 UTC (rev
5663)
@@ -0,0 +1,38 @@
+Remove backup battery (BAT1701)
+
+
+The backup battery is a problematic device: it's large, difficult to
+solder, and it's prone to aging. Replacing a defective backup battery
+is difficult at best.
+
+If we could avoid having a backup battery at all, this would improve
+the reliability of the entire system.
+
+Furthermore, a working backup battery prevents the PMU from entering
+NoPower state, so some of the PMU settings may or may not be preserved
+when main battery and USB power are removed. We can neither assume that
+settings different from NoPower defaults have been preserved, nor can
+we assume that they have. This complicates the overall power on
+behaviour and may introduce subtle problems.
+
+From a software point of view, having a single well-defined power on
+state would therefore be beneficial.
+
+We depend on the backup battery for powering the RTC clock in the PMU.
+This clock is also supplied if the PMU is in Standby mode, running from
+USB or main battery. We therefore only need the backup battery if there
+is no USB power and main battery has either cut itself off or is absent.
+
+Software could preserve time by synchronizing the modem's RTC with the
+system time, and setting the PMU's RTC from that source if starting from
+NoPower.
+
+Furthermore, time information can be obtained via GPS, sometimes GSM,
+and - if Internet connectivity is available - also via NTP.
+
+According to the formula given in Telit's RTC Application Note (can't
+find it anymore ?!?), a 100 uF capacitor would supply the modem's RTC
+for one minute, which should be sufficient for battery removal.
+
+
+Author: Werner Almesberger <wer...@openmoko.org>
--- End Message ---
--- Begin Message ---
Author: werner
Date: 2009-09-24 16:02:51 +0200 (Thu, 24 Sep 2009)
New Revision: 5664
Modified:
trunk/gta02-core/modules/mkloe
Log:
- mkloe: exit on fped error (forgotten commit)
Modified: trunk/gta02-core/modules/mkloe
===================================================================
--- trunk/gta02-core/modules/mkloe 2009-09-24 13:40:23 UTC (rev 5663)
+++ trunk/gta02-core/modules/mkloe 2009-09-24 14:02:51 UTC (rev 5664)
@@ -45,7 +45,7 @@
for n in $MODS; do
- fped -k $n.fpd -
+ fped -k $n.fpd - || { echo "$n" 1>&2; exit 1; }
done |
perl -e '
while (<>) {
--- End Message ---
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