LeafLabs Garden » Topic: mchck: $7 Cortex-M0 board

LeafLabs Garden » Topic: mchck: $7 Cortex-M0 board http://forums.leaflabs.com/topic.php?id=1324 A place to share, learn, and grow... en-US Fri, 22 Jan 2016 00:07:29 +0000 http://bbpress.org/?v=1.0.2 <![CDATA[Search]]> q http://forums.leaflabs.com/search.php mconners on "mchck: $7 Cortex-M0 board" http://forums.leaflabs.com/topic.php?id=1324#post-63153 Thu, 03 Oct 2013 23:09:10 +0000 mconners 63153@http://forums.leaflabs.com/ Funny, I just stumbled across this thread after acquiring the parts and building a mchck. I didn't remember posting on this topic before. Anyway, a lot has changed on that project since then. It is now on the Freescale K20 chip, and I ordered enough parts to build 10 of them. It was really my first foray into building a board with SMDs and I was actually successful!!! Those 603 parts are tiny though. One has been assembled, flashed, and programmed via usb. It did give me an excuse to buy a bus pirate. Anyway, it's worth checking out at <a href="http://mchck.org" rel="nofollow">http://mchck.org</a>. You really can build them for under $5 each. Mike feurig on "mchck: $7 Cortex-M0 board" http://forums.leaflabs.com/topic.php?id=1324#post-22977 Tue, 19 Mar 2013 14:00:40 +0000 feurig 22977@http://forums.leaflabs.com/ Looks like its about time to ping you... gbulmer on "mchck: $7 Cortex-M0 board" http://forums.leaflabs.com/topic.php?id=1324#post-22702 Sun, 03 Mar 2013 13:53:51 +0000 gbulmer 22702@http://forums.leaflabs.com/ feurig - "you got slides to go with that?" I have some slides which I'm not super-pleased with. The colours scheme needs fixing (bilious), and it seemed their should be a few more builds, so I'd like to rework them. If you hear nothing within two weeks, please ping me, and I'll try to get them done. Also, some of it relied on a 'demo' using the Arduino IDE (in verbose mode), opening up files, and using objdump. Another part was examining a section of the ATmega48/88/168/328 manual, and directly using information from that to create an Arduino program which poked under the covers. feurig on "mchck: $7 Cortex-M0 board" http://forums.leaflabs.com/topic.php?id=1324#post-22701 Sun, 03 Mar 2013 00:03:31 +0000 feurig 22701@http://forums.leaflabs.com/ ps "thinking inside the box" and "Arduino style coding" would be trademarks of suspect devices if we were still dating lawyers.... which thank goodness I am not (haven't kicked the catholics habit yet but one indulgence at a time... feurig on "mchck: $7 Cortex-M0 board" http://forums.leaflabs.com/topic.php?id=1324#post-22700 Sat, 02 Mar 2013 23:24:27 +0000 feurig 22700@http://forums.leaflabs.com/ gbulmer you got slides to go with that? I have been doing a lot of thinking inside the box lessons lately. gbulmer on "mchck: $7 Cortex-M0 board" http://forums.leaflabs.com/topic.php?id=1324#post-22696 Fri, 01 Mar 2013 13:30:33 +0000 gbulmer 22696@http://forums.leaflabs.com/ mconners - Thank you for posting the book link to the forum. A friend had sent me a link recently, bit I had forgotten about it. I have skimmed it, and came to the same conclusion as you, that it was very solid "old school" stuff, and valuable to everyone who wants to get under the skin of the IDE GUI, or have portable skills. Oddly enough, I did a public presentation last night about "Under the covers of Arduino", covering tool chain, in-memory layout (process) and how that works, as well the GPIO peripheral. So I can confirm there are folks who'd like to understand what actually is going on. mconners on "mchck: $7 Cortex-M0 board" http://forums.leaflabs.com/topic.php?id=1324#post-22694 Thu, 28 Feb 2013 20:32:57 +0000 mconners 22694@http://forums.leaflabs.com/ gbulmer, the main reasons I bought them, one you had commended them to me a while back, two <a href="http://www.cs.indiana.edu/~geobrown/book.pdf" rel="nofollow">http://www.cs.indiana.edu/~geobrown/book.pdf</a> I got that link off of the arm.com web site. As part of their university program, that is the lab manual for the Featured Arm Course. The prof seems like an old school guy, he features the STM32LVL on linux and Mac all command line and interfaces with several periperals. Everything I've learned about ARM I've taught myself so having someone else's perspective is great, plus once you learn everything on the command line the gui's are a snap. Thanks again, Mike anton on "mchck: $7 Cortex-M0 board" http://forums.leaflabs.com/topic.php?id=1324#post-22692 Thu, 28 Feb 2013 03:32:53 +0000 anton 22692@http://forums.leaflabs.com/ There is no support for stm32l1 in libmaple. For now I looking at Teensy3, as it potentially can be USB host. gbulmer on "mchck: $7 Cortex-M0 board" http://forums.leaflabs.com/topic.php?id=1324#post-22688 Wed, 27 Feb 2013 21:46:49 +0000 gbulmer 22688@http://forums.leaflabs.com/ mconners - all of those ST Discovery boards are great value. The VL part has lots of peripherals on-board. AFAIK, the only down-side of the STM32VL is the programmer is an ST-LINK and not an ST-LINK/V2. The V2 plays better with Mac. ST's standard peripheral library is a bit ugly, but it is much, much better than nothing. The amazing value-for-money of the Discovery boards is they all have an on-board hardware debugger! Single-step, breakpoints, trigger a breakpoint when data is changed, interrupt a running program. Brilliant! If you want to use gdb, have a look at <a href="https://github.com/texane/stlink" rel="nofollow">https://github.com/texane/stlink</a> STM32F3Discovery is even better! As you can guess, I am a fan :-) mconners on "mchck: $7 Cortex-M0 board" http://forums.leaflabs.com/topic.php?id=1324#post-22686 Wed, 27 Feb 2013 19:00:42 +0000 mconners 22686@http://forums.leaflabs.com/ gbulmer - just picked up two of the STM32VL Discover boards from newark. $9.88 each. Seems like they should be fun to play around with. Mike tormod on "mchck: $7 Cortex-M0 board" http://forums.leaflabs.com/topic.php?id=1324#post-21653 Thu, 13 Dec 2012 15:23:29 +0000 tormod 21653@http://forums.leaflabs.com/ I have used pl2303 a lot on Linux with good experience in our labs interfacing various RS232-equipped gear. It is used in the very common dongles that look like this: <a href="http://uk.farnell.com/tripp-lite/u209-000-r/adapter-usb-a-to-male-serial-17/dp/1838797" rel="nofollow">http://uk.farnell.com/tripp-lite/u209-000-r/adapter-usb-a-to-male-serial-17/dp/1838797</a> with semi-transparent housing and a LED (I think the original design is "UC-232A" from Aten International Co.). They work on Mac OS X also, if you use the right driver, see <a href="https://code.google.com/p/stm32flash/issues/detail?id=36" rel="nofollow">https://code.google.com/p/stm32flash/issues/detail?id=36</a> Good point about the external crystal. That is a good way to guess what the chip is if you can spot a crystal in the adapter. And don't forget the USB connector in the budget, if you compare cost with separate USB/UART adapters. For separate, 3.3V USB/UART boards I prefer the CP2102-based ones from Baite because they have more pinouts (although not all headers soldered). I only have one bad experience with a cheap PL2303 based adapter where the RX input impedance was too low and it pulled down the signal from the MAX232 in the other end, but I don't know if the chip itself was to blame. mikep on "mchck: $7 Cortex-M0 board" http://forums.leaflabs.com/topic.php?id=1324#post-21649 Thu, 13 Dec 2012 09:27:53 +0000 mikep 21649@http://forums.leaflabs.com/ AFAIK, the PL2303 is used in those data cables for Nokia phones (DKU-5 and CA-42, <a href="http://dx.com/p/dku-5-data-cable-fully-compatible-with-nokia-dku-5-cell-phone-data-cable-13863?r=58979887" rel="nofollow">http://dx.com/p/dku-5-data-cable-fully-compatible-with-nokia-dku-5-cell-phone-data-cable-13863?r=58979887</a>, <a href="http://dx.com/p/data-cable-compatible-with-nokia-ca-42-446?rt=1&p=2&m=2&r=3&k=1&t=1&s=13863&u=446)" rel="nofollow">http://dx.com/p/data-cable-compatible-with-nokia-ca-42-446?rt=1&p=2&m=2&r=3&k=1&t=1&s=13863&u=446)</a>. I have used one of these cables as a cheap serial-USB converter. It's 3.3V level and you only get RX and TX and GND (no additional signals, at least not on the cable I had). I only used it on windows though. But from what I read it should be recognized on Linux as well. They're pretty popular for debricking a router or a Seagate Dockstar ... <a href="http://buffalo.nas-central.org/index.php/Use_a_Nokia_Serial_Cable_on_an_ARM9_Linkstation" rel="nofollow">http://buffalo.nas-central.org/index.php/Use_a_Nokia_Serial_Cable_on_an_ARM9_Linkstation</a> gbulmer on "mchck: $7 Cortex-M0 board" http://forums.leaflabs.com/topic.php?id=1324#post-21631 Wed, 12 Dec 2012 20:17:36 +0000 gbulmer 21631@http://forums.leaflabs.com/ tormod - Thanks, very interesting suggestion. As you say, PL2303 $0.32 for 100 off, eg: <a href="http://www.aliexpress.com/item/USB-IC-PL2303HX-PL2303/657757063.html" rel="nofollow">http://www.aliexpress.com/item/USB-IC-PL2303HX-PL2303/657757063.html</a> I think they may be low-cost because: A. Prolific have end-of-life'd: "PL-2303HX (Chip Rev A) will be phased out at the end of October 2012" <a href="http://prolificusa.com/portfolio/pl-2303hx-usb-to-serial-bridge-controller" rel="nofollow">http://prolificusa.com/portfolio/pl-2303hx-usb-to-serial-bridge-controller</a> B. It needs an external crystal. Have you any experience with the PL2303? Does it work okay on Mac & Linux? tormod on "mchck: $7 Cortex-M0 board" http://forums.leaflabs.com/topic.php?id=1324#post-21630 Wed, 12 Dec 2012 16:48:40 +0000 tormod 21630@http://forums.leaflabs.com/ For cheap USB/UART there is also the PL2303. I saw PL2303 chips down to $0.32 (at 100 pieces, free shipping) on aliexpress.com. feurig on "mchck: $7 Cortex-M0 board" http://forums.leaflabs.com/topic.php?id=1324#post-21550 Fri, 07 Dec 2012 17:34:27 +0000 feurig 21550@http://forums.leaflabs.com/ Its kind of a dirty secret. Unless they have fixed it you can buy the mcp2200 (usually for less money than the pic18f14k50) and reprogram it.