Wireless controller targets IoT with on-board user-application memory

July 02, 2014 // By Jean-Pierre Joosting
A system-on-chip, fully integrated wireless controller with on-board memory for end-user application programming and control functions is available from LPRS for Internet of Things (IoT) and other wireless control or communication system builders

The low-cost feature-rich LPRS eRIC (easyRadio Integrated Controller) wireless module has been designed to provide system builders with a simple to integrate complete wireless communication solution combined with a wide range of user options. eRIC modules are supplied preconfigured to operate as standalone modules but can be modified by any developer to take full advantage of the internal processor’s features.

The internal flash memory at the core of the eRIC wireless module has made this possible and LPRS have partitioned it to enable full utilisation of the embedded microcontroller with free access to high end compilers.

eRIC contains 32K of flash memory and 4K of RAM, and is partitioned into 2 halves each of 16K / 2K respectively. The first partition is preprogramed (although fully upgradeable) with Radio and CPU low level functions which handle most areas relating to RF, CPU control and re-flashing application memory. Functions include, background Transmit, Receive, power saving and CPU speed management and more.

This partition is referred to as eROS – easyRadio Operating System. However rather than being a ‘system thread’ eROS responds to interrupts enabled by the application developers code.

The second partition (User Application Flash Memory) is accessed using template project files for use on the TI CCS compilers. The project templates, load all chip, optimisation, and linker files to interface with the eROS subsystem, and also contains headers for controlling other chip features unrelated to Radio functions, which removes the need to understand the individual registers and peripherals of the microcontroller. The TI CCS IDE, contains features like Code Complete, which greatly simplifies the discovery of features to use.