Difference between revisions of "How to use UARTs"
From IGEP - ISEE Wiki
| Line 3: | Line 3: | ||
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]]. | 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]]. | ||
| − | Note: This program have a debug option using GPIOs to debug via <span lang="en" | + | Note: This program have a debug option using GPIOs to debug via <span lang="en" id="result_box" class="short_text"><span class="hps">oscilloscope</span></span> the Kernel latencies between "write" and "select" functions.<br> |
= Feedback and Contributing = | = Feedback and Contributing = | ||
| Line 9: | Line 9: | ||
At any point, if you see a mistake you can contribute to this How-To. | At any point, if you see a mistake you can contribute to this How-To. | ||
| − | = Preparing IGEP <br> | + | = Preparing IGEP = |
| + | |||
| + | === Check UARTs === | ||
| + | <br> | ||
| + | === Wire connectors === | ||
'''Under Construction''' | '''Under Construction''' | ||
[[Category:Communications]] [[Category:Work_in_progress]] [[Category:How_to_forge]] | [[Category:Communications]] [[Category:Work_in_progress]] [[Category:How_to_forge]] | ||
Revision as of 10:53, 19 January 2012
Contents
Overview
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 Linaro Headless with Kernel 2.6.35.y.
Note: This program have a debug option using GPIOs to debug via oscilloscope the Kernel latencies between "write" and "select" functions.
Feedback and Contributing
At any point, if you see a mistake you can contribute to this How-To.
Preparing IGEP
Check UARTs
Wire connectors
Under Construction
