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| Freeing up the serial port https://www.8devices.com/community/viewtopic.php?f=13&t=636 |
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| Author: | GregWood [ 10 Nov 2013, 19:03 ] |
| Post subject: | Freeing up the serial port |
How do I free up the serial port on the carambola 2 module so that I can use it for my application? I followed the directions here: https://forum.openwrt.org/viewtopic.php?id=41826 This works almost well enough. Two minor issues: Some initial boot messages are shown, but I can use GPIO to enable the serial out of my board. So this is not a big problem. Character echoing remains on the console. Verified with a scope. This character echoing remains until something else accesses ttyATH0. What I did as a test was ssh into the carambola 2 and run "screen ttyATH0 115200". I was able to send characters between my ssh session and the console port as expected. Once I terminated screen character echoing was no longer active on the serial console. Is there a way to disable this character echoing on startup? The ideal solution for me would be to have the serial console enabled by a gpio line on startup. If for example and GPIO is high then the console works as normal, but when low the console is completely silent. Is this possible? |
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