Tiny Assembly - Revision history

Flixr: fixed typo, flash bootloader with make upload_bl not bl_upload

2011-05-24T07:43:07Z

fixed typo, flash bootloader with make upload_bl not bl_upload

← Older revision		Revision as of 01:43, 24 May 2011
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	* connect LPC_TXD_0 and LPC_RXD_0 of Serial1 to the serial port of your PC through a 3.3V-USB-RS232 converter (LPC_TXD_0 - PC_RX, LPC_RX_0 - PC_TX), attach LPC_P0.14 (also GPS_RESET if using Tiny V2.x) to a buffered PC_RTS or connect to a button		* connect LPC_TXD_0 and LPC_RXD_0 of Serial1 to the serial port of your PC through a 3.3V-USB-RS232 converter (LPC_TXD_0 - PC_RX, LPC_RX_0 - PC_TX), attach LPC_P0.14 (also GPS_RESET if using Tiny V2.x) to a buffered PC_RTS or connect to a button
	* run the serial ROM loader lpc21isp to flash USB bootloader with		* run the serial ROM loader lpc21isp to flash USB bootloader with
	make ~~bl_upload~~		make upload_bl
	* pull the LPC_P0.14 line low (also GPS_RESET with Tiny V2.x) if not connected to RTS and then reset the board		* pull the LPC_P0.14 line low (also GPS_RESET with Tiny V2.x) if not connected to RTS and then reset the board
	-> check the rx/tx pins for data if flashing does not succeed		-> check the rx/tx pins for data if flashing does not succeed

Esden at 20:27, 10 March 2011

2011-03-10T20:27:04Z

← Older revision		Revision as of 14:27, 10 March 2011
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	* With everything on the board, minus the LPC2148 you should see ~ 580 ohms of resistance on 3V3 rail		* With everything on the board, minus the LPC2148 you should see ~ 580 ohms of resistance on 3V3 rail

			[[Category:Hardware]]

Martinmm at 17:50, 30 November 2008

2008-11-30T17:50:22Z

← Older revision		Revision as of 11:50, 30 November 2008
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	-> check if reset signal can be measured at the LPC reset pin 57		-> check if reset signal can be measured at the LPC reset pin 57
	* check the 12MHz at LPC pin 61, XTAL2 (XTAL_out)		* check the 12MHz at LPC pin 61, XTAL2 (XTAL_out)
	* connect LPC_TXD_0 and LPC_RXD_0 of Serial1 to the serial port of your PC through a 3.3V-USB-RS232 converter (LPC_TXD_0 - PC_RX, LPC_RX_0 - PC_TX), attach LPC_P0.14 (also GPS_RESET if using Tiny V2.x~~/TWOG~~) to a buffered PC_RTS or connect to a button		* connect LPC_TXD_0 and LPC_RXD_0 of Serial1 to the serial port of your PC through a 3.3V-USB-RS232 converter (LPC_TXD_0 - PC_RX, LPC_RX_0 - PC_TX), attach LPC_P0.14 (also GPS_RESET if using Tiny V2.x) to a buffered PC_RTS or connect to a button
	* run the serial ROM loader lpc21isp to flash USB bootloader with		* run the serial ROM loader lpc21isp to flash USB bootloader with
	make bl_upload		make bl_upload
	* pull the LPC_P0.14 line low (also GPS_RESET with Tiny V2.x~~/TWOG~~) if not connected to RTS and then reset the board		* pull the LPC_P0.14 line low (also GPS_RESET with Tiny V2.x) if not connected to RTS and then reset the board
	-> check the rx/tx pins for data if flashing does not succeed		-> check the rx/tx pins for data if flashing does not succeed
	* deattach the LPC_P0.14 (and GPS_RESET for Tiny V2.x~~/TWOG~~), reset the board		* deattach the LPC_P0.14 (and GPS_RESET for Tiny V2.x), reset the board
	* the USB bootloader outputs debug information with 115200 8N1 on the serial port		* the USB bootloader outputs debug information with 115200 8N1 on the serial port
	-> try the uart_tunnel from arm7/test, logical high and low should be sent from LPC_RXD_0 to LPC_TXD_1 and LPC_RXD_1 to LPC_TXD_0 (at GPS pins)		-> try the uart_tunnel from arm7/test, logical high and low should be sent from LPC_RXD_0 to LPC_TXD_1 and LPC_RXD_1 to LPC_TXD_0 (at GPS pins)

Martinmm: /* Some thoughts about starting up a Tiny */

2008-11-12T20:33:04Z

Some thoughts about starting up a Tiny

← Older revision		Revision as of 14:33, 12 November 2008
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	-> check if reset signal can be measured at the LPC reset pin 57		-> check if reset signal can be measured at the LPC reset pin 57
	* check the 12MHz at LPC pin 61, XTAL2 (XTAL_out)		* check the 12MHz at LPC pin 61, XTAL2 (XTAL_out)
	* connect LPC_TXD_0 and LPC_RXD_0 of Serial1 to the serial port of your PC through a 3.3V-USB-RS232 converter (LPC_TXD_0 - PC_RX, LPC_RX_0 - PC_TX), attach LPC_P0.14 to a buffered PC_RTS or connect to a button		* connect LPC_TXD_0 and LPC_RXD_0 of Serial1 to the serial port of your PC through a 3.3V-USB-RS232 converter (LPC_TXD_0 - PC_RX, LPC_RX_0 - PC_TX), attach LPC_P0.14 (also GPS_RESET if using Tiny V2.x/TWOG) to a buffered PC_RTS or connect to a button
	* run the serial ROM loader lpc21isp to flash USB bootloader with		* run the serial ROM loader lpc21isp to flash USB bootloader with
	make bl_upload		make bl_upload
	* pull the LPC_P0.14 line low if not connected to RTS and then reset the board		* pull the LPC_P0.14 line low (also GPS_RESET with Tiny V2.x/TWOG) if not connected to RTS and then reset the board
	-> check the rx/tx pins for data if flashing does not succeed		-> check the rx/tx pins for data if flashing does not succeed
	* deattach the LPC_P0.14, reset the board		* deattach the LPC_P0.14 (and GPS_RESET for Tiny V2.x/TWOG), reset the board
	* the USB bootloader outputs debug information with 115200 8N1 on the serial port		* the USB bootloader outputs debug information with 115200 8N1 on the serial port
	-> try the uart_tunnel from arm7/test, logical high and low should be sent from LPC_RXD_0 to LPC_TXD_1 and LPC_RXD_1 to LPC_TXD_0 (at GPS pins)		-> try the uart_tunnel from arm7/test, logical high and low should be sent from LPC_RXD_0 to LPC_TXD_1 and LPC_RXD_1 to LPC_TXD_0 (at GPS pins)

Michel: /* Expected Current Consumptions */

2007-12-28T07:11:10Z

Expected Current Consumptions

← Older revision		Revision as of 01:11, 28 December 2007
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	Here are some general current guidelines to aid in initial assembly checks.		Here are some general current guidelines to aid in initial assembly checks.

	Tiny13 w/ fresh, unprogrammed LPC & NO LEA-4P GPS: ~~~15mAh~~ @ 12.3V (~~185mWh~~)		Tiny13 w/ fresh, unprogrammed LPC & NO LEA-4P GPS: ~15mA @ 12.3V (185mW)
	Tiny13 running target code (not airborne code) & NO LEA-4P GPS: ~~~25mAh~~ @ 12.3V (~~310mWh~~)		Tiny13 running target code (not airborne code) & NO LEA-4P GPS: ~25mA @ 12.3V (310mW)
	Tiny13 running target code (not airborne code) w/ GPS: ~~~45mAh~~ @ 12.3V (~~550mWh~~)		Tiny13 running target code (not airborne code) w/ GPS: ~45mA @ 12.3V (550mW)

	''The Tiny13 uses a switching supply, realize that you will see varying currents with varied input voltages hence the inclusion of ~~mWh~~ units''		''The Tiny13 uses a switching supply, realize that you will see varying currents with varied input voltages hence the inclusion of mW units''

	== Some thoughts about starting up a Tiny ==		== Some thoughts about starting up a Tiny ==

Mcurrie: /* Tiny13 1.1 Specifics */

2007-10-20T01:55:02Z

Tiny13 1.1 Specifics

← Older revision		Revision as of 19:55, 19 October 2007
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	== Tiny13 1.1 Specifics ==		== Tiny13 1.1 Specifics ==

	* Place the vertically shorter tantalum chip capacitors near the ~~supply~~ first as you will be able to place the vertically taller with tweezers.		* Place the vertically shorter tantalum chip capacitors (C18 & C21) near the 3V3 LDO first as you will be able to place the vertically taller with tweezers.
	* Place the diode next to the large "pulse" inductor before any other backside components'		* Place the diode (U$2) next to the large "pulse" inductor before any other backside components
	* Do not expect either of the two LEDs to illuminate. They are configured via airborne flight code, you may never see or need them.		* Do not expect either of the two LEDs to illuminate. They are configured via airborne flight code, you may never see or need them.

Mcurrie at 01:01, 20 October 2007

2007-10-20T01:01:57Z

← Older revision		Revision as of 19:01, 19 October 2007
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	* check modem, connect tx, rx, gnd and supply		* check modem, connect tx, rx, gnd and supply
	* try to aquire sats outside		* try to aquire sats outside

			== Troubleshooting ==

			Below are some oddball facts discovered in the process of debugging problems. These bits of information may cut a few hours off of a bug chasing adventure.

			* With everything on the board, minus the LPC2148 you should see ~ 580 ohms of resistance on 3V3 rail

Mcurrie: /* Some thoughts about starting up a Tiny */

2007-10-20T01:00:09Z

Some thoughts about starting up a Tiny

← Older revision		Revision as of 19:00, 19 October 2007
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	* use a microscope or a magnifying glass to check for short circuits		* use a microscope or a magnifying glass to check for short circuits
	* use a power supply for first tests, not a battery, limit the current to about 100mA, use a voltage of about 7V		* use a power supply for first tests, not a battery, limit the current to about 100mA, use a voltage of about 7V
	* With everything on the board, minus the LPC2148 you should see ~ 580 ohms of resistance on 3V3 rail
	* use the on-board supply, do not try to feed voltage from the outside		* use the on-board supply, do not try to feed voltage from the outside
	* the 7V should not drop due to current limiting, measure the 5V and the 3.3V supply on the board		* the 7V should not drop due to current limiting, measure the 5V and the 3.3V supply on the board

Mcurrie: /* Some thoughts about starting up a Tiny */

2007-10-20T00:59:10Z

Some thoughts about starting up a Tiny

← Older revision		Revision as of 18:59, 19 October 2007
Line 56:		Line 56:
	* use a microscope or a magnifying glass to check for short circuits		* use a microscope or a magnifying glass to check for short circuits
	* use a power supply for first tests, not a battery, limit the current to about 100mA, use a voltage of about 7V		* use a power supply for first tests, not a battery, limit the current to about 100mA, use a voltage of about 7V
			* With everything on the board, minus the LPC2148 you should see ~ 580 ohms of resistance on 3V3 rail
	* use the on-board supply, do not try to feed voltage from the outside		* use the on-board supply, do not try to feed voltage from the outside
	* the 7V should not drop due to current limiting, measure the 5V and the 3.3V supply on the board		* the 7V should not drop due to current limiting, measure the 5V and the 3.3V supply on the board

Mcurrie at 20:33, 27 August 2007

2007-08-27T20:33:31Z

← Older revision		Revision as of 14:33, 27 August 2007
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			== General Tips ==

			* Use a quality pair of tweezers, 0402 components will seem like 1/4W resistors again
			* Liquid Flux and a small brush or even the lead of a 1/4W resistor will turn a small congealed soldering mess into perfection
			* Use optical magnification if you or your eyes need it (it is not necessary however)
			* Use a liquid flux cleaner either spray on or brush on and scrub the board clean. This will a) impress your friends b) reveal potential shorts or lack of solder and c) reduce high resistance electrical paths on the board particularly around the A/D section
			* Print out a customized and enlarged diagram of the PCB you are working on. Pencil in the component designators by hand while using the graphical desktop environment as an aid
			* Print out a Bill of Materials sheet
			* 0402 components, if fallen onto a dirty workbench will be hopelessly lost. Use a clean white blotter or even some sheets of paper.
			* Populate as little parts as necessary for a first power-up test. In most cases it is perfectly OK to place EVERY component minus the LEA-4P GPS module. Doing this allows you to divide and conquer should a problem arise during assembly.

			== Tiny13 1.1 Specifics ==

			* Place the vertically shorter tantalum chip capacitors near the supply first as you will be able to place the vertically taller with tweezers.
			* Place the diode next to the large "pulse" inductor before any other backside components'
			* Do not expect either of the two LEDs to illuminate. They are configured via airborne flight code, you may never see or need them.

	== LEA-4P Mounting ==		== LEA-4P Mounting ==

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	== Some thoughts about starting up a Tiny ==		== Some thoughts about starting up a Tiny ==

	* populate all parts except the ~~GPS rx~~ for first tests to make them simpler		* populate all parts except the LEA-4P for first tests to make them simpler
	* check the polarity of all parts, compare to a picture of a working reference board		* check the polarity of all parts, compare to a picture of a working reference board
	* use a microscope or a magnifying glass to check for short circuits		* use a microscope or a magnifying glass to check for short circuits
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	* flash the autopilot with		* flash the autopilot with
	make [AIRCRAFT] ap.upload		make [AIRCRAFT] ap.upload
	* the LEDs should work according to your configuration
	* check telemetry through serial port, messages should be displayed		* check telemetry through serial port, messages should be displayed
	* test A/D converters for supply voltage and IR sensors		* test A/D converters for supply voltage and IR sensors
	* check modem, connect tx, rx, gnd and supply		* check modem, connect tx, rx, gnd and supply
	* solder GPS, current should increase to about 100mA at 7V in the lab with no sats visible (60mA @ 12V)
	* try to aquire sats outside		* try to aquire sats outside