嵌入式应用的能源调试工具

　　嵌入式应用的能源调试工具

　　随着开发进程的推进，代码变得更大，而能源效率优化变得困难和耗时的任务。如果没有适当的工具，识别错误，如可避免的等待周期可能被中断服务程序，或周边的误区，变得越来越困难。如果这些“能量漏洞”没有发现和开发阶段解决，它来检测他们的领域或老化试验几乎是不可能的。

　　有嵌入式系统应用中的节能和效率在开发商优先考虑的越来越多。这些限制可以根据政府规定（如计量应用），要求增加电池的使用寿命，或仅仅是需要降低电费。在电池供电的系统，能源效率通常扮演最重要的角色。如果开发商是满意的系统电池寿命，提高能源效率意味着他们可以切换到更小更便宜的电池，降低整体成本。也有情况下的使用寿命必须扩展到最大值；例如，在电池无法更换或更换涉及很高的成本。

　　To accommodate this trend， a growing number of “ultra-low-power” microcontrollers （MCUs） have become available. However， tools that provide developers with a detailed monitor of their systems‘ energy consumption have not accompanied the MCUs until recently. Having a low-power MCU by itself does not mean lower energy consumption. The trick is to optimize your software， not just in terms of functionality， but also with respect to energy efficiency. Having full control of the hardware surrounding the MCU and optimizing the overall software and peripheral usage are crucial factors for reducing system energy consumption. Software is not usually seen as an energy drain but every clock cycle consumes energy. Minimizing this is a key challenge in reducing overall system energy consumption.

　　Developers are now able to visualize the energy consumption of their systems and relate it to the software running on the microcontroller. Real-time information on current consumption is correlated with program counter sampling to provide advanced energy monitoring capabilities.

　　Energy friendly embedded systems development can be seen as a three stage cycle： hardware debugging， software functionality debugging， and software energy debugging.