Board: Mulle
The Mulle is a miniature wireless Embedded Internet System suitable for wireless sensors connected to the Internet of Things, and designed for rapid prototyping. It can be bought directly from Eistec AB.
https://github.com/eistec/mulle/wiki/Datasheets contains a list of relevant documentation for the components.
| MCU | MK60DN512VLL10 – Cortex-M4, 512 kB flash, 64kB RAM |
|---|---|
| radio chipset | AT86RF212B, sub-GHz IEEE802.15.4 transceiver, similar to the AT86RF233 |
| external flash memory | Micron M25P16 16 Mbits external NOR flash, used for storing configuration, measurements and other slow changing non-volatile data |
| external FRAM memory | Cypress/Ramtron FM25L04B 4 Kbits external F-RAM, used for storing counters and other rapidly changing non-volatile data |
| accelerometer | ST micro LIS3DH MEMS accelerometer, |
This port is currently a work in progress, lots of components are not working yet. The examples/default basic functionality is working. The branch mulle on https://github.com/gebart/RIOT is the current progress. A PR will be opened after it has been cleaned up a bit more.
The radio is currently untested in RIOT, but since the RF231 is somewhat supported it should be a minor porting effort to get the RF212B working.
| Device | ID | Supported | Comments |
|---|---|---|---|
| MCU | MK60DN512VLL10 | partly | See below |
| Low-level driver | GPIO | yes | |
| PWM | no | not started | |
| UART | yes | RX and TX works in examples/default using UART1, implemented but not tested other ports |
|
| I2C | no | not started, first priority after radio | |
| SPI | in progress | implemented core functionality, needs refactoring for PCS and CTAR config | |
| USB | no | not started | |
| RTT | in progress | untested, ported from Contiki | |
| RNG | no | not started | |
| hwtimer | yes | hwtimer uses LPTMR module for timer, 32.768 kHz tick rate | |
| timer | yes | in progress, uses PIT for additional timers, F_BUS tick rate (48 MHz default) | |
| LPM/LLWU | no | not started, will port some code from Contiki for low power modes | |
| Radio Chip | AT86RF212B | no | waiting for refactoring work being done for the IoT_Lab-M3 |
| Accelerometer | LIS3DH | no | will port from Contiki |
| Flash | M25P16 | no | will port from Contiki |
| FRAM | FM25L04B | no | will port from Contiki |
See ARM Family, and Eistec wiki - Installing-toolchain (GCC)
Working:
- gcc-arm-embedded
- Clang 3.4, Clang 3.5 - Install procedure not documented but pretty straightforward (Gentoo:
USE=multitarget), Makefiles and build system is fully functional with Clang.
Not working:
- Link time optimization (LTO) - Requires the GOLD linker, which currently fails on the K60 ldscripts. Needs refactoring of the ldscripts.
See Eistec wiki.