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This How-To is meant to be a starting point for people to learn use UART for IGEP v2 devices as quickly and easily as possible. In this how-to, we use a program'''(upload source code)''', executed twice in separated progres at the same IGEP. Its function is get a number from UART, increase it and send result via other UART, the result will be a infinite loop between 2 UARTs. This program was tested in [http://releases.linaro.org/platform/linaro-m/headless/final/linaro-m-headless-tar-20101108-2.tar.gz Linaro Headless] with [[Linux Kernel 2.6.35.y|Kernel 2.6.35.y]].
More information about [http://en.wikipedia.org/wiki/UART UART]. Note: This program have a debug option using GPIOs to debug via <span lang="en" classid="short_textresult_box" idclass="result_boxshort_text"><span class="hps">oscilloscope</span></span> the Kernel latencies between "write" and "select" functions.<br>
= Feedback and Contributing =