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GNU ARM toolchain embedded development on Linux

May 21, 2009, 17:38 (0 Talkback[s])
(Other stories by Bill Zimmerly)

[ Thanks to An Anonymous Reader for this link. ]

"Paramount among the concerns of embedded systems developers is how to get the most processing power from the least amount of electricity. The ARM processor family is one of the better designs for balancing processor power and battery power consumption.

"The ARM core has gained technology advances through several versions over the last 20 years. Recent system on a chip (SoC) processors running on mobile phones such as the T-Mobile G1 Android combine dual-core (ARM9 and ARM11) processors to improve the performance of multimedia applications on low-powered platforms.

"The more recent ARM cores support two operational states: ARM state, in which the core executes 32-bit, word-aligned instructions, and THUMB state, which executes 16-bit, halfword-aligned instructions. ARM mode provides the maximum power and addressing range capability of the processor, whereas THUMB mode allows portions of a program to be written in a very tight, memory-conserving way that keeps memory costs low. Switching between the modes is a trivial exercise, and for many algorithms, the size of the code required can be reduced significantly."

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