Lisa/Bone - Revision history

NeoFromMatrix: /* MCU or not MCU */ mcu suggestion

2014-04-29T18:51:08Z

MCU or not MCU: mcu suggestion

← Older revision		Revision as of 12:51, 29 April 2014
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	I suggest a 64 pins STM F4 (like in Lisa/M)		I suggest a 64 pins STM F4 (like in Lisa/M)
			NeoFromMatrix: I would suggest STM32F429ZIT6 15,55€Mouser

	We don't need level converters. BBB is happy with 3.3V IOs		We don't need level converters. BBB is happy with 3.3V IOs

2014-04-18T06:27:58Z

MCU or not MCU: typo

← Older revision		Revision as of 00:27, 18 April 2014
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	My current plan is to base the cape on Lisa/M, rework supply and connectors.		My current plan is to base the cape on Lisa/M, rework supply and connectors.
	NeoFromMatrix: Maybe we could use a MCU with more IO and 0805 parts.		NeoFromMatrix: Maybe we could use a MCU with more IO (like the discovery board) and 0805 (or bigger) parts.
	The cape should provide enough ~~parts~~ and 0805 is easier ~~tosolder~~ by hand.		The cape should provide enough space and 0805 is easier to solder by hand.

	Communications between F4 and BBB is through SPI (BBB master, F4 slave) in order to have high bandwith		Communications between F4 and BBB is through SPI (BBB master, F4 slave) in order to have high bandwith

2014-04-17T23:36:23Z

← Older revision		Revision as of 17:36, 17 April 2014
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	SPI code on MCU side has changed a lot since Lisa/L, I wouldn't bet it is still working.		SPI code on MCU side has changed a lot since Lisa/L, I wouldn't bet it is still working.
	I really don't care which UART is used.		I really don't care which UART is used.

			Looking into the UART on both the F4 and BBB are very fast. We can achieve over 3Mbps.

	== Connectors ==		== Connectors ==

2014-04-16T16:55:31Z

Supply

← Older revision		Revision as of 10:55, 16 April 2014
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	-I would like to be able to power the whole thing from 3/4S flight pack		-I would like to be able to power the whole thing from 3/4S flight pack
			6S would be cool (for extreme fast models), this is also the limitaton for most cheap chargers

	-Should we go for the PTH8080 that were used on Lisa/L, a pair of them?		-Should we go for the PTH8080 that were used on Lisa/L, a pair of them?

	-Any idea for a good connector for input supply ? Or do we just skip that and go for beefy solder pads as usual?		-Any idea for a good connector for input supply ? Or do we just skip that and go for beefy solder pads as usual?
			0.1" screw terminals, seperate input for the servos (these maybe need higher voltage and will need more power)

	-Beagle has the possibility to run on one lipo cell and has a chip capable of charging it from the 5V supply ( [http://www.element14.com/community/community/knode/single-board_computers/next-gen_beaglebone/blog/2013/08/10/bbb--rechargeable-on-board-battery-system see here] )		-Beagle has the possibility to run on one lipo cell and has a chip capable of charging it from the 5V supply ( [http://www.element14.com/community/community/knode/single-board_computers/next-gen_beaglebone/blog/2013/08/10/bbb--rechargeable-on-board-battery-system see here] )

2014-04-16T11:20:20Z

Use cases

← Older revision		Revision as of 05:20, 16 April 2014
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	Bryan: We may be able to enable host mode on USB0 and get use of both USB0 and USB1 on the board.		Bryan: We may be able to enable host mode on USB0 and get use of both USB0 and USB1 on the board.

			* Run code, used for research topics (maybe generated from Matlab/Simulink) on the BBB and let the F4 fly the plane and do the basic (realtime) stuff

	* What else?		* What else?

	[[Category:Lisa]] [[Category:Autopilots]]		[[Category:Lisa]] [[Category:Autopilots]]

2014-04-16T11:18:32Z

Communications

← Older revision		Revision as of 05:18, 16 April 2014
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	* BBB communicates throught internet stick, BBB forwards data to F4		* BBB communicates throught internet stick, BBB forwards data to F4
	* BBB uses internet stick, F4 uses xbee -> redundant communication, interent stick could be used for image/video		* BBB uses internet stick, F4 uses xbee -> redundant communication, interent stick could be used for image/video
			* BBB to F4 SPI interconnect, for doing some things as userprocesss on BBB and realtime stuff on the F4
	* CAN has built in data framing and CRC with many-master-many-slave type data system.		* CAN has built in data framing and CRC with many-master-many-slave type data system.
	Lisa/M (the F4 board) has one can driver. Do we want to add a second driver for the BBB?		Lisa/M (the F4 board) has one can driver. Do we want to add a second driver for the BBB?

	== Use cases ==		== Use cases ==

2014-04-15T09:27:26Z

← Older revision		Revision as of 03:27, 15 April 2014
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	Let's start from Lisa/M connectors. We have a little bit more space available		Let's start from Lisa/M connectors. We have a little bit more space available
	- I would like 10 full size servo connectors - supply bus isolated		- I would like 10 full size servo connectors - supply bus isolated

			NeoFromMatrix: how about 0.1" headers ? They are easier to solder by hand and molex connectors cost a bit...

	== Supply ==		== Supply ==
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	-Do we want to be able to flash F4 from BBB?		-Do we want to be able to flash F4 from BBB?

			NeoFromMatrix: That would be nice.

	== Communications ==		== Communications ==

2014-04-15T09:13:57Z

MCU or not MCU

← Older revision		Revision as of 03:13, 15 April 2014
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	My current plan is to base the cape on Lisa/M, rework supply and connectors.		My current plan is to base the cape on Lisa/M, rework supply and connectors.
			NeoFromMatrix: Maybe we could use a MCU with more IO and 0805 parts.
			The cape should provide enough parts and 0805 is easier tosolder by hand.

	Communications between F4 and BBB is through SPI (BBB master, F4 slave) in order to have high bandwith		Communications between F4 and BBB is through SPI (BBB master, F4 slave) in order to have high bandwith

2014-04-15T01:21:50Z

← Older revision		Revision as of 19:21, 14 April 2014
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	* Someone runs image processing on BBB (using a usb webcam?) and current rotorcraft code in F4 - similar to case 1		* Someone runs image processing on BBB (using a usb webcam?) and current rotorcraft code in F4 - similar to case 1

	* OpenCV onboard for motion tracking and 2d ground tracking for extra stability systems		* OpenCV onboard for motion tracking and 2d ground tracking for extra stability systems.

			Does image processing require some kind of fancy camera with a fancy interface, or is USB good enough? BBB only has one USB... so webcam, or wifi, or hub..
			Bryan: Cheap USB-webcam would be all we would need.

	~~Does image processing require some kind of fancy camera with a fancy interface, or is USB good enough? BBB only has one USB... so webcam, or wifi, or hub..~~
	Do we want a USB hub on the daughterboard - i would say no, keep it cheap and simple		Do we want a USB hub on the daughterboard - i would say no, keep it cheap and simple
			Bryan: We may be able to enable host mode on USB0 and get use of both USB0 and USB1 on the board.


	* What else?		* What else?

	[[Category:Lisa]] [[Category:Autopilots]]		[[Category:Lisa]] [[Category:Autopilots]]

2014-04-15T00:57:15Z

← Older revision		Revision as of 18:57, 14 April 2014
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	Should we implement something like this to allow changing the vehicle's battery pack without having to shutdown the autopilot (or switch from lab power supply to flight pack) ?		Should we implement something like this to allow changing the vehicle's battery pack without having to shutdown the autopilot (or switch from lab power supply to flight pack) ?
	1400mAh give ~3h endurance and weights 25g, 500mAh is 10g		1400mAh give ~3h endurance and weights 25g, 500mAh is 10g
			Discarded, Bryan says it doesn't work

	== Misc ==		== Misc ==