These and the like are all over eBay. http://www.ebay.com/itm/STM32F103C8T6-ARM-STM32-Minimum-System-Development-Board-Module-For-Arduino-DHUS-/321569700934?hash=item4adf0c3c46:g:Q7AAAOSw0kNXhGr~
The search term is "minimum system arm" There are two types both under $5 but I'm using the STM32F103 based parts. These are 72MHz clocked 32-bit CPUs with 64K flash. No floating point. See below if you need that. I have several of the above and can program them with Arduino IDE. Someone wrote a boot loader but I mostly use the ST-Link from ST Micro and flash it without using a boot loader. There are a number of free tool chains Another one I like costs more ($13.83 at Digikey) but is much more powerful as it has hardware floating point http://www.digikey.com/product-detail/en/stmicroelectronics/NUCLEO-F401RE/497-14360-ND/4695525 ST makes a large range of Nucleo boards. The "401" is a good starting point. Notice the board is design so you can cut it. It actually snaps in half so you can remove the programmer. Also you can pull the jumper blocks and "remove it. But here is the good part the Nucleo programmer works with the STM32F103 board from eBay if you can rig a few jumper wires with female ends. Or buy a clone of the ST-Link which is the same thing. Also there is the "TI Launchpad" from Texas Instruments that sell for about $10 and some of them have TI's ARM chip. But for the same price I think Nucleo offers more flexibility. But you can't beat the price of the minimum ARM system on eBay. I've seen them for as low as $3 with are shipping but now it looks like they $4 each shipped As I said Arduino IDE works but look up "mbed" It is a free RTOS and IDE that is web based or if you don't like that it can be CLI based or Eclipse based. It is almost as easy to use as Arduino but a real multi-tasking RTOS that runs on these little ARM Cortex M chips. REMEBER. The ARM Cortex M is a micro controller that competes with Atmel AVR and the larger 32-bit PIC. Clock speed is on the order of 100 MHz. The ARM Cortex A is the more powerful type that runs Linux and is likely inside your cell phone. Clock is on the order of 1 Ghz and many of the "A type" are multi core, up to quad core. So, no, you can't buy a computer that runs Linux for $2.83 To run Linux you need something like a Pi3 for $35. The Pi3 needs about 1 amp to run. The typical M0 can run on literally micro-amps, like a coin size battery. (Well, uA if you understand power management. mA if you don't.) On Wed, Feb 22, 2017 at 7:26 PM, Dave Cole <linuxcncro...@gmail.com> wrote: > On 2/22/2017 12:36 PM, Chris Albertson wrote: > > Now that ARM based boards are available for under $5 I've completely > > moved away from AVR. > > I'm missing something. > > Where can you buy ARM based boards for under $5.00? Or did you mean $50 ? > > The Arduino Zero is $54 -$40 and the Neutrino, the kickstarter clone of > the Zero is $19 if you can buy one. > Both boards also work with the Atmel ICE as well apparently. > > Dave > > ------------------------------------------------------------ > ------------------ > Check out the vibrant tech community on one of the world's most > engaging tech sites, SlashDot.org! http://sdm.link/slashdot > _______________________________________________ > Emc-users mailing list > Emc-users@lists.sourceforge.net > https://lists.sourceforge.net/lists/listinfo/emc-users > -- Chris Albertson Redondo Beach, California ------------------------------------------------------------------------------ Check out the vibrant tech community on one of the world's most engaging tech sites, SlashDot.org! http://sdm.link/slashdot _______________________________________________ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
