From 5a606c759d912f15b2c94a1cabadd5e123eb79c9 Mon Sep 17 00:00:00 2001 From: Keith Packard Date: Tue, 18 Dec 2012 00:12:48 -0800 Subject: Add basic MPSerial info Signed-off-by: Keith Packard --- MPSerial.mdwn | 1 + MPSerial/index.mdwn | 47 +++++++++++++++++++++++++++++++++++++++++++++++ index.mdwn | 4 ++++ 3 files changed, 52 insertions(+) create mode 100644 MPSerial.mdwn create mode 100644 MPSerial/index.mdwn diff --git a/MPSerial.mdwn b/MPSerial.mdwn new file mode 100644 index 0000000..c04a714 --- /dev/null +++ b/MPSerial.mdwn @@ -0,0 +1 @@ +[[!map pages="MPSerial/* and ! MPSerial/*/*"]] diff --git a/MPSerial/index.mdwn b/MPSerial/index.mdwn new file mode 100644 index 0000000..b31f12a --- /dev/null +++ b/MPSerial/index.mdwn @@ -0,0 +1,47 @@ +[[!meta title="MPSerial"]] + + +# MicroPeak Serial Interface (MPSerial) # + +The MicroPeak Serial Interface board provides a way to capture flight +logs over a USB connection to a computer running Linux, Mac OS or +Windows. + +## MicroPeak Data ## + + * Stored in on-chip 512B eeprom + * Records raw barometer readings every 192ms + * Enough storage for 48 seconds + +No changes are needed to the MicroPeak hardware, but new firmware that +includes the data download feature is necessary to use the MicroPeak +Serial Interface. + +## MicroPeak Interface ## + +MicroPeak transmits the entire flight log via the LED just after +reporting the last flight altitude at power up. The data are +transmitted in regular serial format at 9600 baud. + +The MicroPeak Serial Interface board contains a phototransistor, +op-amp and serial-to-USB interface chip. + +## Developer View ## + +Here's a close-up view of the hardware + + * Hardware Features + * ROHM RPM-075PT Phototransistor + * Peak sensitivity matches MicroPeak LED color + * [ST Micro TSV521](http://www.st.com/internet/analog/product/251123.jsp) CMOS op-amp + * Low power + * [FTDI FT230](http://www.ftdichip.com/Products/ICs/FT230X.html) Serial to USB adapter + * Drivers available for Linux, Mac OS X and Windows. + + * Tools Used + * [gEDA](http://www.gpleda.org/) for schematic capture and PCB layout + + * Licenses + * The hardware is licensed under the [TAPR](http://www.tapr.org) [Open Hardware License](http://www.tapr.org/ohl.html) + +
diff --git a/index.mdwn b/index.mdwn index 0502ad9..0ab47e3 100644 --- a/index.mdwn +++ b/index.mdwn @@ -68,6 +68,10 @@ is a higher-performance alternative to [TeleDongle](TeleDongle/). is a high-end flight computer with 6 pyro channels, more and better sensors, GPS, and a high performance bidirectional RF telemetry link. +* [MicroPeak Serial Interface](MPSerial/) +provides an interface between [MicroPeak](MicroPeak/) and USB to +download flight log data. + * [OpenAlt](OpenAlt/) was Bdale's original project here, a dual-deploy rocketry altimeter. One prototype was built, but never flown. This project is now indefinitely on hold. -- cgit v1.2.3 From 6f6d73289cc52bad837e075be6b65ef63554c8b5 Mon Sep 17 00:00:00 2001 From: Keith Packard Date: Wed, 19 Dec 2012 08:55:28 -0800 Subject: Add link to apogee page for MicroPeak Signed-off-by: Keith Packard --- MicroPeak/index.mdwn | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/MicroPeak/index.mdwn b/MicroPeak/index.mdwn index ee4d7a5..a736c71 100644 --- a/MicroPeak/index.mdwn +++ b/MicroPeak/index.mdwn @@ -11,7 +11,7 @@ src="v1.0/micropeak-dime-640.jpg"> Production units are available from the [Garbee and Garbee](http://auric.gag.com/index.php?route=product/product&product_id=80) -web store +web store and [Apogee Components](http://www.apogeerockets.com/Electronics_Payloads/Altimeters/MicroPeak_Altimeter) ## Documentation ## -- cgit v1.2.3 From e43a9a24bf7705161782981ac40864199d3e1552 Mon Sep 17 00:00:00 2001 From: Keith Packard Date: Wed, 19 Dec 2012 08:57:36 -0800 Subject: MicroPeak boost detect is 120Pa or almost exactly 10m at sea level Signed-off-by: Keith Packard --- MicroPeak/index.mdwn | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/MicroPeak/index.mdwn b/MicroPeak/index.mdwn index a736c71..05e432e 100644 --- a/MicroPeak/index.mdwn +++ b/MicroPeak/index.mdwn @@ -67,7 +67,7 @@ Here's a close-up view of the hardware * Written in C * Samples pressure every 96ms * Delay 30s after power-on to finish airframe prep - * Detect boost with 20m altitude change + * Detect boost with 10m altitude change * Exponential averaging filter to minimize transient effects. * Tools Used -- cgit v1.2.3