X-Git-Url: https://git.gag.com/?a=blobdiff_plain;f=Notebook;h=2659d9bb6e76af2abb7f500a474d479672a40fcf;hb=878277f456366db34532cd76c62584dc4e696fef;hp=a888776dd20edbeceda1b3c9a16676eddac11a1e;hpb=9b056f1d2c0a94ec3dafb4c119c4e5c36f1f1804;p=hw%2Ftelemega

diff --git a/Notebook b/Notebook
index a888776..2659d9b 100644
--- a/Notebook
+++ b/Notebook
@@ -84,7 +84,7 @@
 
 2011.11.23
 - decisions based on IRC conversation with keithp
-	- GPS on usart3 PC10/11 doesn't conflict with the serial bootloader
+	+ GPS on usart3 PC10/11 doesn't conflict with the serial bootloader
 	- pick either usart1 or usart2 on PD5/6 or PA9/10 for bootloader
 	- flash and companion can share an SPI, sensors need dedicated SPI
 	- use 3 screws for v_pyro, either jumper to tie to v_lipo or attach
@@ -96,17 +96,17 @@
 	- include a screw attached to ground, easy attach for magnetic switch
 	- that makes 18 screws, use two 9's back to back
 
-	- silicon	
-		- STM32L151VBT6 Cortex-M3 SOC
-		- CC1120 digital radio				spi2
-		- W25Q64BVZEIG 64Mbit flash			spi2
+	- silicon							q100 $
+		- STM32L151VBT6 Cortex-M3 SOC				5.39
+		- CC1120 digital radio				spi2	6.60
+		- W25Q64BVZEIG 64Mbit flash			spi2	2.06
 
 	- sensors
-		- Freescale MMA6556KWR2 120g 1-axis accel	spi1
-		- Bosch BMA250 16g 3-axis accel			spi1
-		- Meas Spec MS5607 baro sensor			spi1
-		- ITG-3200 2000 deg/sec 3-axis gyro		i2c1
-		- SkyTraq Venus 638 GPS				usart3
+		- Freescale MMA6556KWR2 120g 1-axis accel	spi1	5.00
+		- Bosch BMA250 16g 3-axis accel			spi1	3.07
+		- Meas Spec MS5607 baro sensor			spi1	6.35
+		- ITG-3200 2000 deg/sec 3-axis gyro		i2c1	8.00
+		- SkyTraq Venus 638 GPS				usart3	10.00
 
 	- companion port					spi2
 								i2c2
@@ -185,3 +185,65 @@ To Do
   mass.  However, if the chip antenna performance is "adequate", it saves
   surface area, mass, and BOM cost.
 
+2011.12.01
+- traded email with Invensense, their US distributor is cdiweb.com, they
+  have ITG-3200 in stock for $10 each and $8 in q100, and they have the new
+  IMU-6000 gyro+accel part for $15 each or $13 at q100.  
+
+	http://www.cdiweb.com/Manufacturers/invensense
+
+	http://www.cdiweb.com/ProductDetail/ITG3200/405256
+	http://www.cdiweb.com/ProductDetail/MPU6000/420595
+
+2012.02.06
+- so where are we...
+
+	- silicon							q100 $
+		- STM32L151VBT6 Cortex-M3 SOC				5.39
+		- CC1120 digital radio				spi2	6.60
+		- W25Q64BVZEIG 64Mbit flash			spi2	2.06
+
+	- sensors
+		- Freescale MMA6556KWR2 120g 1-axis accel	spi1	5.00
+		- Meas Spec MS5607 baro sensor			spi1	6.35
+		- IMU-6000 gyro+accel 					13.00
+		- SkyTraq Venus 638 GPS				usart3	10.00
+		- Honeywell HMC5883L magnetic sensor
+
+	- companion port					spi2
+								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
+	+ elide MMA6556
+	- merge megaaccel content
+
+- 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!
+
+
+2012.06.30
+- let's move to the u-blox MAX-6Q GPS on v0.2
+	http://www.u-blox.com/en/download/documents-a-resources/u-blox-6-gps-modules-resources.html