mborgerson's articles:

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Puzzling power results STM32F4 FPU test 17 21 (1/5/2013 5:59:47 PM) comp.arch.embedded In a recent thread Jon Kirwan and I were discussing FPUs and power consumption. I decided to try some real world tests on an STM32F4 Discovery board. After a few tests in the ChiBios RTOS, where I discov... Mark

Can't profile functions with STM32 and SWD 0 37 (9/14/2012 4:22:14 AM) comp.arch.embedded I'm working with an STM32F205, which I can program and debug with an ST-LINK V2 and the SWD port. I'm using IAR EWARM 6.40 and the C-Spy debugger. Programming, run, stop, breakpoints, etc, all work fine.... Mark

Micro SD power consumption 3 38 (5/23/2009 4:03:11 PM) comp.arch.embedded I'm working on a low-power logger to continuously log data at fairly low rates (2-3KB/s) for months. I've successfully used SD and SD micro cards at lower rates, but I'm seeing a power dissipation problem with... Mark

FTDI FT245R power requirement 5 42 (1/12/2009 4:07:28 PM) comp.arch.embedded I've used the FT245R for USB data upload in a number of data logger designs. I have generally used the logger 3.3V supply to power the chips. However, I just ran across the following note in the most recen... Mark

Those French---Behind the Power Curve Again 2 61 (12/19/2008 5:46:51 PM) comp.arch.embedded I received the following note in an email newsletter: "synchronous design startup readies ultra-low power 16-bit MCU On the eve of the IP'2008 conference this week in Grenoble, Tiempo AS, French startup speci... Mark

SanDisk Ultra II SD plus USB 1 36 (12/1/2007 12:28:27 AM) comp.arch.embedded I just bought a SanDisk 1GB Ultra II SD + USB at Staples for about $27. I have several projects that use SD cards in SPI mode for data storage. This SD card seems to work fine after a limited amount of test... Mark

Embedded Systems Conference priced out of reach? 28 20 (2/11/2007 7:06:57 PM) comp.arch.embedded I just got my flyer for the April San Jose ESC. Inside the front cover I found the following "best value" prices for all access passes: before Feb 6 $1795 (the brocure arrived on the 10th) Mar 5 ... Mark

AT91SAM7 samples 1 50 (4/25/2005 4:43:23 PM) comp.arch.embedded Hi, Does anyone know of a source for samples of any of the chips in the AT91SAM7 line? My standard net searches show only the dev kits at $250. I don't really want another dev kit, since I already have the ... Mark

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Are real programmers a dying species? 63 20 (1/22/2013 9:42:06 PM) comp.arch.embedded I am setting up a new TV-set, a Philips 32pfl3807h . I had never seen a commercial product programmed in such a moronic way. The programmer must have been outright illiterate. Can you imagine the only w... dp (745)

Methods for Reading a Positive to Negative Range on an ADC 21 28 (2/6/2013 6:30:34 PM) comp.arch.embedded I have a sensor circuit that will output a voltage between -4 and +4 V. I need to pass this to an ADC. What are some methods for reading this type of range on an ADC with only a positive rail? ... lutherblackwood (6)

Interfacing 3.3V SPI devices to a 5V MCU 12 19 (2/7/2013 1:53:26 PM) comp.arch.embedded I'm about to do some work with interfacing 3.3V SPI based devices to 5V MCUs and unlike the devices I've been used to, these particular 3.3V SPI devices are _not_ 5V tolerant. Interfacing the SPI output li... clubley (1184)

Really tiny microcontrollers 50 23 (2/25/2013 8:47:20 AM) comp.arch.embedded I'm wondering what the physically smallest microcontrollers are, that aren't too crazy to program and that are amenable to hand soldering with normal SMT tools. I've found some of the ATtiny parts in 2x2mm ... no.email6 (1517)

LPC1788 versus LPC2478 3 5 (2/26/2013 2:44:12 PM) comp.arch.embedded Hi, I have a project running on a LPC2478 with a QVGA LCD, similar to the Olimex LPC2478-STK (a subset ). It runs at 72MHz. The size of my code is approaching the 500k limit, so I have tried to cross ... gydesen.jensREMOVE (10)

Working principle of a Desktop environment 8 8 (3/6/2013 5:28:00 AM) comp.arch.embedded Hi guys You guys have been always a great help to me. Today I am posting or you can say asking something very unusual. till now you guys have met people asking that questions about Linux and it's deve... piyushpandey

STM32F2 series users group 16 8 (3/11/2013 3:02:02 PM) comp.arch.embedded Can anyone point me in the direction of a suitable user's group? I'm currently battling with a STM32F205 and come across a couple of snags!! -- Mike Perkins Video Solutions Ltd www.videosolutions.lt... spam29 (1456)

Market size of new, non-legacy, 5V ICs ? 41 11 (3/17/2013 10:35:28 AM) comp.arch.embedded Outside of the hobbyist ecosystem, what is the actual market size for new, non-legacy, ICs with a maximum Vcc of ~5V ? I've just picked up a few of the new Microchip 1Mbit SPI RAM ICs: http://uk.farnell.... clubley (1184)

A C++-Language Question (Maybe C, too) 64 17 (4/2/2013 12:01:32 AM) comp.arch.embedded Technically this should be on the C++ language group, but I want an answer, not to either be sneered at or to start a religious war. I think this works the same if it's C, once you take out the C++-isms. ... tim177 (4404)

OT: Recommend a decent news reader? 25 8 (4/7/2013 12:01:21 AM) comp.arch.embedded Outlook Express used to be ok if you had the OE patch fix for top-posting, bottom-feeding or whatever they called it, but it seems to have gone the way of much half-decent software. I could editorialize on... nrm1 (6)