Forums - GPIO /dev/tty* equivalence to access UART through screen

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GPIO /dev/tty* equivalence to access UART through screen
22imonreal
Join Date: 10 Feb 21
Posts: 80
Posted: Wed, 2021-03-17 02:58
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Hello,

I am trying to access the UART0 and UART1 serial ports on the Low Speed Expansion Connector 1 on the Qualcomm Robotics RB5 Development Kit through screen, but I do not know what /dev/* interface each of the LSEC1 ports correspond to.

I have managed to connect to UART1 by setting the Dip Switch button 2 OFF and then using

screen /dev/console <baud_rate> 8N1

However, that solution is not optimal. Where or how would I find which /dev/tty* correspond to each port?

Any help will be very much appreciated, thanks in advance.

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Re: GPIO /dev/tty* equivalence to access UART through screen — Best Answer
kevin.dai
Join Date: 21 Oct 20
Posts: 137
Posted: Wed, 2021-04-21 13:52
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lrwxrwxrwx 1 root root 0 Feb 23 01:45 ttyHS0 -> ../../devices/platform/soc/998000.qcom,qup_uart/tty/ttyHS0
lrwxrwxrwx 1 root root 0 Feb 23 01:45 ttyMSM0 -> ../../devices/platform/soc/a90000.qcom,qup_uart/tty/ttyMSM0
 
UART1  --> ttyHS0
UART0 --> ttyM0
 
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