From 44ae3f7f093a116e01176a025b16a450c43c52e2 Mon Sep 17 00:00:00 2001
From: Bdale Garbee <bdale@gag.com>
Date: Wed, 27 Jun 2012 23:18:16 -0600
Subject: [PATCH] elide the magnetic sensor

---
 Notebook       |  27 ++++++++++++
 megametrum.sch | 111 -------------------------------------------------
 2 files changed, 27 insertions(+), 111 deletions(-)

diff --git a/Notebook b/Notebook
index d793c7e..7d1b133 100644
--- a/Notebook
+++ b/Notebook
@@ -214,3 +214,30 @@ To Do
 								i2c2
 						bootloader intf	usart1
 								usart2
+
+2012.06.17
+- keithp reports what looks like RF getting into the SPI bus that the cc1120,
+  flash, and companion port are on.  looking things over, we should:
+
+	- rotate the cc1120 180 degrees, bringing SPI off the northwest corner
+	  and just dealing with the rework that will provoke on the UHF side
+
+	- add 330 ohm / 47pf snubbers on the source end of all SPI lines
+
+	- rework the SPI traces to put the SPI at one end as much as possible
+
+- since MMA6556 remains unobtainium, moving to an Analog Devices part with
+  the 5V switcher may be necessary
+
+- cut the big MicroMaTch down to just a 4-pin debug connector for STLINKv2?
+
+- can we use the 64-pin version of the STM32L151?
+	- it looks like the answer is yes, but of course it would require a
+	  massive re-routing of the board...
+
+- move the MPU-6000 from I2C to SPI
+
++ leave the mag sensor out
+
+- that leaves nothing on I2C, but if we do use I2C, we need pull-ups!
+
diff --git a/megametrum.sch b/megametrum.sch
index d5bf4ff..bb66807 100644
--- a/megametrum.sch
+++ b/megametrum.sch
@@ -3034,107 +3034,6 @@ value=dualLED
 T 68700 68100 5 10 0 0 0 0 1
 loadstatus=smt
 }
-C 50000 66700 1 0 0 3.3V-plus.sym
-N 51400 65500 51600 65500 4
-N 51600 65500 51600 66700 4
-N 51400 65900 51600 65900 4
-C 49000 64500 1 90 0 capacitor.sym
-{
-T 48300 64700 5 10 0 0 90 0 1
-device=CAPACITOR
-T 48700 65300 5 10 1 1 180 0 1
-refdes=C20
-T 48100 64700 5 10 0 0 90 0 1
-symversion=0.1
-T 48100 64600 5 10 1 1 0 0 1
-value=0.22uF
-T 49000 64500 5 10 0 1 0 0 1
-footprint=0402
-T 49000 64500 5 10 0 1 0 0 1
-loadstatus=smt
-T 49000 64500 5 10 0 1 0 0 1
-vendor=digikey
-T 49000 64500 5 10 0 1 0 0 1
-vendor_part_number=587-1228-1-ND
-}
-C 52300 65500 1 90 0 capacitor.sym
-{
-T 51600 65700 5 10 0 0 90 0 1
-device=CAPACITOR
-T 52500 66300 5 10 1 1 180 0 1
-refdes=C22
-T 51400 65700 5 10 0 0 90 0 1
-symversion=0.1
-T 52300 65600 5 10 1 1 0 0 1
-value=0.1uF
-T 52300 65500 5 10 0 1 0 0 1
-footprint=0402
-T 52300 65500 5 10 0 1 0 0 1
-loadstatus=smt
-T 52300 65500 5 10 0 1 0 0 1
-vendor=digikey
-T 52300 65500 5 10 0 1 0 0 1
-vendor_part_number=399-3027-1-ND
-}
-C 49000 63000 1 90 0 capacitor.sym
-{
-T 48300 63200 5 10 0 0 90 0 1
-device=CAPACITOR
-T 48700 63800 5 10 1 1 180 0 1
-refdes=C21
-T 48100 63200 5 10 0 0 90 0 1
-symversion=0.1
-T 48200 63100 5 10 1 1 0 0 1
-value=4.7uF
-T 49000 63000 5 10 0 1 0 0 1
-footprint=0402
-T 49000 63000 5 10 0 1 0 0 1
-loadstatus=smt
-T 49000 63000 5 10 0 1 0 0 1
-vendor=digikey
-T 49000 63000 5 10 0 1 0 0 1
-vendor_part_number=490-5408-1-ND
-}
-C 49000 63000 1 0 0 HMC5883L.sym
-{
-T 49755 66200 5 10 0 1 0 0 1
-device=HMC5883L
-T 49305 66445 5 10 1 1 0 0 1
-refdes=U9
-T 49000 63000 5 10 0 0 0 0 1
-footprint=LPCC16
-T 50200 66450 5 10 1 1 0 0 1
-value=HMC5883L
-T 49000 63000 5 10 0 1 0 0 1
-loadstatus=smt
-T 49000 63000 5 10 0 1 0 0 1
-vendor=digikey
-T 49000 63000 5 10 0 1 0 0 1
-vendor_part_number=342-1082-1-ND
-}
-N 49000 65500 48800 65500 4
-N 48800 65500 48800 65400 4
-N 48800 64500 48800 64300 4
-N 48800 64300 49000 64300 4
-N 48800 63900 49000 63900 4
-C 48700 62700 1 0 0 gnd.sym
-C 49700 62700 1 0 0 gnd.sym
-C 50400 62700 1 0 0 gnd.sym
-C 52000 65200 1 0 0 gnd.sym
-N 51400 64700 52300 64700 4
-{
-T 51900 64800 5 10 1 1 0 0 1
-netname=sda1
-}
-N 51400 64300 52300 64300 4
-{
-T 52000 64400 5 10 1 1 0 0 1
-netname=scl1
-}
-N 48800 66700 51600 66700 4
-N 49000 65900 48800 65900 4
-N 48800 65900 48800 66700 4
-N 52100 66400 51600 66400 4
 N 56300 56000 55000 56000 4
 {
 T 55000 56100 5 10 1 1 0 0 1
@@ -3272,16 +3171,6 @@ netname=gps_pps
 }
 C 46600 65900 1 0 0 gnd.sym
 N 46500 66200 46700 66200 4
-N 51400 63900 52300 63900 4
-{
-T 51700 64000 5 10 1 1 0 0 1
-netname=mag_int
-}
-N 65800 66400 67100 66400 4
-{
-T 66500 66500 5 10 1 1 0 0 1
-netname=mag_int
-}
 N 55000 62800 56300 62800 4
 {
 T 55000 62900 5 10 1 1 0 0 1
-- 
2.30.2