Changes

[[File:arm_board_r1.jpg|thumb|Revision 1 of the ARM development board]] The goal is to have a small, cheap, and powerful development boardthat supports USB for easy programming, at low parts costs (currentestimate < $5). This allows us to use the board for all silly purposeswhere spending >$20 for an Arduino is just too much. The board is likethe [http://pjrc.com/teensy/index.html Teensy], just with an ARMmicrocontroller instead. == Quick links == * [https://gitorious.org/usb-micro-proto/nucproto Project sources]* [http://www.nuvoton.com/NuvotonMOSS/Community/ProductInfo.aspx?tp_GUID=5dbf7d7a-b6df-4fe1-91c9-063449500ce7 NUC homepage]* [http://download.nuvoton.com/NuvotonMOSS/DownloadService/Member/DocumentsInfo.aspx?tp_GUID=DA00-NUMICRONUC100 Reference Manual]* [https://silver.arm.com/download/download.tm?pv=1102513 ARMv6 Architecture Manual] (requires registration) == Detailed Description == The board uses a[http://www.nuvoton.com/NuvotonMOSS/Community/ProductInfo.aspx?tp_GUID=5dbf7d7a-b6df-4fe1-91c9-063449500ce7 Nuvoton NUC120]48-pin microcontroller which has an ARM Cortex-M0 CPU32-bit CPU core. Features:* up to 50MHz* 32KKB-128KKB program flash, 4KKB-16KKB RAM, 4KKB data flash, 4KKB boot loader flash* 2 UART, 1 SPI, 2 I2C, USB, 1 analog comparator, 4 PWM, 8 12-bit ADC channels The board contains:* USB A connector on board outline* optional Mini-USB receptacle* USB header connector for direct wire connections (e.g. inside PC)* optional voltage regulator for external voltage (up to 13V)* optional LiPo battery charger IC for battery operation* LiPo charger can be driven from a solar panel* SWD debug/programming header* reset button* 1 LED for binary debug/information display == Project roadmap == === Hardware design === In beta state. Version 1 boards have been fabbed and need to betested and assembled Errata/changes required for next version:* probably a problem with 3.3V circuit operation and battery: PMOS gate only gets pulled up to 3.3V, but likely needs the full battery voltage. Replacing PMOS with SOT-323 footprint might help routing. === Toolchain === Proprietary windows software is available, but we'd like to havecomplete support with free software tools. ==== What works ==== * gcc/binutils/gdb support ARM Cortex-M0 ==== In progress ==== [http://dangerousprototypes.com/docs/Bus_Blaster Bus Blaster] can speak SWD with KT firmware; use UrJTAG git as root to [http://dangerousprototypes.com/docs/Bus_Blaster_v2_manufacturing_resources flash] (interface=1). TODO: test SWD connection to target. ==== What needs work ==== * Programming/Debugging: [http://openocd.berlios.de/web/ OpenOCD] supposedly supports SWD. Needs to be confirmed what works.* Need bootloader and programming software. Proprietary from Nuvoton available* Tool library? === Programming envionment === * [http://leaflabs.com/docs/ide.html Maple IDE] by LeafLabs is a port of the Arduino IDE for ARM* [http://leaflabs.com/docs/unix-toolchain.html LeafLabs command-line toolchain] might apply in parts, or at least inspire* [https://github.com/esdencorecode/summon-arm-toolchain summon arm toolchain] builds an ARM toolchain == Umbrellas == Eric says: Expansion boards will be called umbrellas. possible umbrellas:* sdcard umbrella* rf umbrella ([http://en.wikipedia.orgmchck/wiki/6LoWPAN 6LoWPAN]/[http://en.wikipedia.org/wiki/IEEE_802.15.4 802.15.4]?)* stepper motor umbrella* lcd umbrella* microphone umbrella* speaker umbrella (with small amp)* power umbrella (bigger voltage regulator) == Example projects ==* OTP generator (yubikey-like)* Your idea here == People involved == [mailto:2@0x2c.org SimonMoved to GitHub], Eric